I went from not knowing enough to feeling like I could teach someone else about these carburettors. Thank you. One thing I was always unsure about is exactly where to add damper oil. After watching your video I realised I should be directing the fluid into the tube where the plunger goes only. Is this correct? Before I would just pour oil in and I suspect it was just filling up around the tube in the piston recess where it can actually do anything.
@LivingWithAClassic
3 жыл бұрын
Yes you are correct, it is just the tube where the damper piston goes that you fill with oil. Glad you enjoyed the video!
@PompeyMatt17
2 жыл бұрын
exactly what I was thinking...I'm English and grew up in the 70s and 80s and I realised I didn't know how SU carbs worked...now it's such a relief I have filled that gap! 😀
@freestyla101
2 жыл бұрын
@@PompeyMatt17 they are so simple
@imnotahealthandsafetyperso4889
2 жыл бұрын
The 2 holes in bottom of the piston are on the butterfly side they make suction in the dash pots and more the throttle opens the more it makes vacuum to the piston to suck it up the dash pot take one apart and and have a look maybe you could add that to a future video ,just a tip from the uk here at (ultimate jaguar tuning) I get customers from all round the uk with transport there cars to me that so called specialists garages can’t fix we have a tuning side and a restoration side from welding to axles rebuilds gearbox’s plus we build many different classes of race cars, we are not cheap but like most jobs we can take a few hours where others take a week then the car still ends up coming to us plus we call at garages that can’t fix jaguars and Daimlers we don’t have to advertise for work and we work 7days a week apart from the tuning side where I have odd weekends off to race my self like I said in another comment I have parts if needed or any advice good luck on your channel I have just recently found it I like it 👍🏻
@prostreetgsxr
3 ай бұрын
Similar design to a motorcycle carburetor, but more complex
@charlesb8713
4 жыл бұрын
You have NOOOO idea how badly I needed to see this video! Have a '71 RR Silver Shadow that wouldn't start. This video explains everything! Thanks!
@LivingWithAClassic
4 жыл бұрын
I'm glad I could help. Thanks for watching!
@MilouTintin
4 жыл бұрын
One detail he might have mentioned, although I guess that really goes under 'tuning', is that the viscosity of the oil in the dashpot determines how rich the fuel mixture is when you accelerate. Most of the time 15 wt oil is what you want. "Marvel Mystery Oil" is perfect.
@robadams9523
4 жыл бұрын
What a great video ! These carbs have been a mystery to most people and your video proves how simple and sensible they are. Thank you!
@LivingWithAClassic
4 жыл бұрын
Thanks Rob! They are beautifully simple in how they operate 🙂
@frankclark2038
4 жыл бұрын
THANK YOU, THANK YOU! I'm a "newbe" with a 1970 MG Midget 1275 MKIII. This short video is PRICELESS and will be a great help to me because my front carb just started spurting fuel from the overflow port on the float bowl! Did I say THANK YOU?!!
@michaelhalsall5684
3 жыл бұрын
Best explanation of how an SU carb. works I 've seen so far. A lot of general information on carbs tends to be about the US designed Holley and Carter designs rather than these British designed carbs. Thanks for sharing here, regards from Australia.
@cudak888
3 жыл бұрын
Came here looking for the SU carb, and instantly recognized Anders' music for the intro. That was enough to ensure I'd watch all the way through!
@LivingWithAClassic
3 жыл бұрын
I’m glad you enjoyed it! He makes great music
@Mitchfon
3 жыл бұрын
Man you have saved me. I just bought my first Rover, a 3500S and these carbs completely baffled me. I spent hours looking at them yesterday trying to figure it out. I finally get it because of your video. Thank you so much!!!
@davidmorgan3115
Жыл бұрын
Great video. I now understand how my carbs work.
@barbaragraham4701
3 жыл бұрын
Getting ready to rebuild the Su carbs on 62 spitfire.. THANK YOU.. You are a great instructor. Ill be watching these when I get to the tuning portion!!
@citycycling
4 жыл бұрын
Very very useful. I've got a '91 Mini that I'm in the process of preparing to take the engine out, and figured it was about time I understood exactly how the carb worked... And now I know...
@davehitchman5171
4 жыл бұрын
Moving the jet is how the choke works as well, and what you 'tune'. On other models its a large nut underneath and the connection to the float chamber is via a flexible hose (which does sometimes break)
@graydonjones6912
Жыл бұрын
I just started my friends 1950 mg after 6 years sitting and after replacing the fuel pump and changing the old gas out it started and ran after tapping on the carburetors a couple of times and runs amazing
@paulhunt1079
2 жыл бұрын
The purpose of the damper is to slow the rise of the piston on sudden acceleration, to give an initially richer mixture, like the throttle pump on fixed jet carbs. It does NOT restrict the fall of the piston, if held up then manually then released it should drop with a sharp click. The piston rises when the throttle is opened because the large vacuum above the piston skirt is offset by atmospheric pressure under the skirt, which enters the carb through the additional holes in the air filter flange above the fixing holes. The float and valve do not go up and down all the time. The valve is not an on/off valve but a continuously variable one, so as soon as the float takes any pressure off the float valve fuel starts trickling in to keep the float and hence the fuel level in the jet at a constant level. Overfilling the damper with oil does not fill the upper part of the piston, any that does get there runs straight out into the carb throat through holes at the bottom of the piston. The piston is not a 'tight' fit in the cover, it is a 'close' fit. If the cover and piston are touching anywhere the carb will not work correctly.
@beegee22
4 жыл бұрын
Great video! Very clear explanation and demonstration of how these carbs work. Thank you!
@TR3A
3 жыл бұрын
Great information. After years of puzzlement I know understand how the SUs on my Triumph work. Thank-you.
@jean-pierrehilbert2273
3 жыл бұрын
Down to the point, precise, no superfluous yada-yada, will watch more of your vids!
@wilsonpendarvis3710
4 жыл бұрын
I first saw one on a 65 panhead. you can always tell who's rolling up, with a su carb on their bike, whistlin.
@LivingWithAClassic
4 жыл бұрын
They do make a great noise
@MGBDCM
3 жыл бұрын
As the fella said to me when he sold me my first LBC [''61 Sprite] 'The closest thing to fuel injection'
@warrenhaines1717
3 жыл бұрын
Thanks very much for taking the time to explain how they work. Much appreciated.
@ADDvanced
Жыл бұрын
Great video man. Long time subscriber. Love it. Going to start getting into my barnfind XJ6, thank you for all your videos.
@LivingWithAClassic
Жыл бұрын
Thank you! good luck with your XJ6
@poly-glot-a-lot6457
2 жыл бұрын
Thank you so much. I just bought a 1970 Rolls-Royce and I was having nightmares about the carbs. I thought they were unique.
@LivingWithAClassic
2 жыл бұрын
Glad the video helped!
@charlieb2176
3 жыл бұрын
thank you. had a rolls royce silver shadow, These carburetors were an anomaly to me, didn’t dare touch them and couldn’t figure out what they were called. pissed petrol all over the ground. Eventually sold it, now i learn its easier then regular carbs.
@davidlloyd3116
3 жыл бұрын
We were tuning SU H8 carburettors on a 3.4L Jaguar C Type today. All about the air intake in the end.
@Darwinion
2 жыл бұрын
Reliant continued to use the SU carb right through to 2002. Much, much longer that the Maestro or Mini.
@richardgreene3460
4 жыл бұрын
Excited about the new series! A+ Adam..as usual!
@LivingWithAClassic
4 жыл бұрын
Thank you Richard!
@ianwilliams4787
4 жыл бұрын
Well explained, thanks.. look forward to how to set the mixtures and get them running smoothy 😊
@LivingWithAClassic
4 жыл бұрын
Thank you Ian!
@alexforbes8614
4 жыл бұрын
Thanks - a really useful video. I have a 61 Mk2 and on a run recently fuel was leaking out of the float chamber. Stopped leak by tightening everything up but need to do some investigation over the winter when she’s laid up. I shall be consulting this video again then! Thanks again!
@LivingWithAClassic
4 жыл бұрын
I'm glad it was helpful! I had some similar leaks on my old XJ6, it stopped when I took the lids of and retightened everything. It gave me time to order the gaskets.
@gabydeville5177
2 жыл бұрын
Thanks for the heads up,
@zvoxjr
4 жыл бұрын
Perfect videos, watch every vid you release. I would be looking forward to see adjustment of 4 carb setup on XJ12 Series 1
@LivingWithAClassic
4 жыл бұрын
Thank you! I would love and early XJ12. I do have a friend who just got an early XJ12 Coupe on carbs. Might be able to do a video on that car
@zvoxjr
4 жыл бұрын
@@LivingWithAClassic That would be great Adam!
@rodvan-zeller6360
4 ай бұрын
Great video, thank you.
@miked5094
4 жыл бұрын
I had to figure out how these carbs work, because my MG TC has a pair on it, and I don't know how these work, so thank you for all of this information!
@LivingWithAClassic
4 жыл бұрын
Glad o could help. Thanks for watching 😊
@FakeItalianoII
2 жыл бұрын
Very good explanation !! ThankS !
@duncanwilson9020
Жыл бұрын
I am working on a project of mine (1970 mgb gt) and I just had to throw a rebuild kit in to fix a fuel leak
@JF-vf6xp
3 жыл бұрын
Awesome video and very educational. Own 67 XKE 4.2
@LivingWithAClassic
3 жыл бұрын
Glad you liked it!
@mrhoogy3150
4 жыл бұрын
Very clear, thank you for that!
@LivingWithAClassic
4 жыл бұрын
You're welcome!
@DrCh0ngo
3 жыл бұрын
Awesome video! Very informative.
@frankk8018
4 жыл бұрын
Great explanation, thanks for taking the time.
@LivingWithAClassic
4 жыл бұрын
Glad you enjoyed it!
@matthisrault5844
3 жыл бұрын
Thank you, now i can understand how they work👍
@bradleywilkinson8882
4 жыл бұрын
Don't forget the Japanese, sports from the 240z early 69 into the 70s that had them as well.
@MGBDCM
4 жыл бұрын
Skinners Union 'knockoffs'
@LivingWithAClassic
4 жыл бұрын
They are not really "SU's", they are Hitachi, a copy of the SU.
@meowtrox1234
3 жыл бұрын
AISIN. I had the same type as they call it "piston" carb in a Mitsubishi lancer Ck2A
@sowedibrahim2540
3 ай бұрын
I need a rebuild kit...where can I get it
@TornadoCAN99
4 жыл бұрын
Good video. Didn't see how the dashpot piston moves up when throttle is opened. Is there some hidden passage that pulls vacuum above the piston to cause it to move upwards?
@LivingWithAClassic
4 жыл бұрын
Thank you! Yes there are holes in the piston that causes the vacuum to let it rise up
@rosewood1
2 жыл бұрын
There is a great deal this doesn't cover. There are also significant differences between the earlier H Type and an automatic choke version. And significantly there is another issue which will have a profound impact. 1. Never assume that the parts in the full kit are correct or good quality 2. Never assume that the parts on your existing SU are correct. Even when they have been rebuilt by some mechanic On my twin H manual Sus the choke bottom nut couldn't be adjusted properly. Or fuel leaked despite new seals jet and jet body. I found that the brass mixture nut on the jet was incorrect with much too much clearance around the standard jet. This meant that the bottom of the jet could move sideways hence leaks. I also found that the new jet bodies while they looked the same actually were not drilled the same. So you could not set the top of the jet flush with the body. And kit parts were not the same or as good as the original. E.g. jet seals and brass compression ferruls. Some are not suitable. I highly recommend getting a vacuum guage and a glass spark plug so you can actually see the colour of the combustion flame and adjust while running. The new jets all had sharp drilled holes that required beveling and the tubes fine polishing. Never sand! SU carbies will not leak when everything is correct. Sadly many English cars have had fires because Sus have either been not maintained or set up incorrectly. Cork Gaskets must be oil soaked at least 24hrs and I use assembly lube. Do not over tighten and absolute clean is required Cheers all
@craigharris7656
4 жыл бұрын
Yet another of life’s mysteries solved !
@LivingWithAClassic
4 жыл бұрын
Now on to the next one
@stuartbagedonow9770
2 жыл бұрын
Thanks
@bigtool4088
3 жыл бұрын
Well put bud
@LivingWithAClassic
3 жыл бұрын
Thanks!
@rosworld9129
3 жыл бұрын
Good video! 🙏🏽 thank you….
@jeffreyprice773
4 жыл бұрын
They modified the needle and seat to Viton tip, you never showed the diaphragm and spring, a common fault was rust or sand getting in and rotting the spring collapsing it causing bad mixture /running, also blocking the hole from float chamber to carb.
@jimtorre5938
4 жыл бұрын
Can you explain the poppet valve spring and how it effect throttle response
@PeterPr0
3 жыл бұрын
Hi, what is the correct fuel level at the float bowl? Or how can I regulate the fuel level at the mid section?
@brucealbert4686
18 күн бұрын
Thoughts on 6-8 rule (hexagon sides opening from level bridge) for fuel mixture richness?
@LivingWithAClassic
15 күн бұрын
Depends on the car it is for. Anything from 1.5 to 3 turns down
@brucealbert4686
14 күн бұрын
@@LivingWithAClassic Yes, that sounds about right. The car is standard 1067 1.8 for MGB, it looks a bit different as to oil passages molding on the block (the engine is re-borred with machined crankshaft with over-size main bearings to match, oversize pistons also after re-bore). carbs are HS4, butterfly bushings replaced with reobring (over-size lever pivot)...should reduce vacuum leaks. Needles on the HS4s are rich type I thought to compensate for the cam (3/4 race from Kent Cam Co.). At 7 sides down too rich I think according to spark plug color so I leaned it up a bit.
@brucealbert4686
14 күн бұрын
1967, not 1067, that would be a Norman car!
@Peter_Riis_DK
2 жыл бұрын
So, why is the piston movement dampened by the oil cylinder?
@LivingWithAClassic
2 жыл бұрын
Bra cause if the piston rises too quickly the engine would bog down. It would get flooded
@Peter_Riis_DK
2 жыл бұрын
@@LivingWithAClassic I thought you might think that. No, it's quite the opposite. Check it out. What's "Bra"?
@fotorabia
4 жыл бұрын
i put up my 1st Jag XJ6 video..finally...
@LivingWithAClassic
4 жыл бұрын
That's great! I will check it out
@freestyla101
3 жыл бұрын
Hey man I’m having trouble checking the mixtures. If checking with the lifting pin, do I need to fully depress the pin?
@chrisknight6884
2 жыл бұрын
You probably have info by now, but with the engine set at a fast idle, find the lifting pin, push it in until it contacts the piston, then use it to raise the piston by about 1/8 of an inch and listen to the engine revs, if they go up the mixture is too rich, so you need to raise the jet ring, if the engine stalls, it is too lean and so you wind the jet down. When the mixture is right the revs will raise slightly and then settle back. Easy as .....
@freestyla101
2 жыл бұрын
@@chrisknight6884 I did but thanks for reaching out. After looking a little more closely I realised the pin travels a bit before contacting the piston. After that I could lift it the right amount. Thanks
@AneesaCotwal
Ай бұрын
Hi can I use make SUV carb on Opel Rekord Car
@LivingWithAClassic
Ай бұрын
Sure you can
@SpencerKleinVintageWatch
4 жыл бұрын
I happened across your video by accident, but very helpful and timely as I am restoring an MGB-GT that had sat in the woods for 36 years. Everything needs to be done, but the SU carbs were something I needed to research. Thank you for this video. Here is the first part of my own video about the MG: kzitem.info/news/bejne/k6yvt2h9p2SQgo4
@LivingWithAClassic
4 жыл бұрын
The MGB-GT is a beautiful car! I almost purchased on as my first car. They are still on my wish list. Looking forward to seeing your MG videos later tonight 😊
@davehitchman5171
4 жыл бұрын
Be VERY VERY careful not to bend or otherwise damage that needle! They are quite soft really. Changing them or the jet is a pain in the backside - simple enough until you need to get them adjusted to fit each other without binding
@uk2k007
2 жыл бұрын
Can these also expand or change shape. I'm sure my dad had issues with this pin causing the car to stall.. i guess that would mean the piston then gets stuck in a "closed" position?
@MyKharli
7 ай бұрын
When anybody could fix their own car . Mind you, you had too quite a lot .
@ryandavis6660
4 ай бұрын
Brilliant comment!
@fastdude2002
2 ай бұрын
*to
@fabrisoto
5 ай бұрын
👏🏽👏🏽👏🏽👏🏽👏🏽👏🏽
@johnwong6382
3 жыл бұрын
6
@lordleonusa
5 ай бұрын
Of course, they are constantly depressed. They are British! (I'm allowed to say that as I'm British)
@kevindaniels6205
Жыл бұрын
The words, "brilliantly" and "simple" should never be used to describe a SU carb. 🙃
@LivingWithAClassic
Жыл бұрын
They are extremely simple though. Just one moving part really
@kevindaniels6205
Жыл бұрын
@@LivingWithAClassic The dash pot moves, the needle can be moved/set, the mixture moves, the float moves, the throttle rod moves, high speed idle, low speed idle, choke, etc.
@johnnyo3fan
3 жыл бұрын
Orientated? Ouch!
@Burritosuupreme
4 жыл бұрын
The intro song sounds like gay 80s robot farts.
@chuniquepaceno470
Жыл бұрын
Thanks, really, really appreciate it. I'm bringing a 1970 Datsun 240z back to life after a 30+ year hybernation and this has really been helpful.
@bernhardlist9359
4 жыл бұрын
There is another often overlooked little item on those carbs: it is the damper piston cap. There are 2 versions available, with a little hole on the top and without. Now there are also 2 versions of the „bell housing“, with a little „fin“ on the top and without. Now these items are very important to vent the piston when moving up BUT the 2 versions mentioned above must not be mixed, that means if you have the version with the fin on the bell housing check inside the top throat and see that there is a hole drilled and it should be clean and with this version bell housing you must use a damper piston cap WITHOUT the hole!!! Otherwise if there is no fin with that venting „fin“ than you must use a cap WITH the hole. Those 2 Versions get mixed up a lot since people replace those dampers over the years and use the wrong one thereafter, sometimes they just replace them to get a brass top because it looks nice and shiny but get the wrong type. So recap: it works fine as long as you don’t use 2 vents or no vents that must be avoided Also as you mentioned that the floats will start to leak and sink down, consequence is overflowing fuel out the vent pipe! PLEASE DO NOT TIGHTEN THOSE SCREWS INTO THE ALUMINIUM HOUSING YOU WILL SOON BREAK IT! Solution: get new floats (plastic ones are available from Burlen) that don’t leak AND check the fluid level adjustment (the funny looking lever that closes the vent) or check that the valve closes tightly else replace the valve. At that time also renew those gaskets. Your problem will be solved and the gas milage will drastically improve. 😁😁😁
@dukecraig2402
4 жыл бұрын
Yep, I've been running SU's on Harley's for years and I've run into that issue several times when guys who didn't know any better would fix them or would try to assemble one from parts from different junked carbs and would get all that mixed up. Those things run fantastic on Harley's, there's not another carb out there that has the throttle response on one like those things do, especially on the older engines, they had intake ports that were too big and port velocity suffered as a result, the constant velocity principle of the SU's really peps up the older one's.
@colvinator1611
Жыл бұрын
Thanks a lot for that information Bernhard. Much appreciated.
@LouMontana-wc7nr
4 жыл бұрын
Buddy, you are killing me here! Every time I turn on my computer there you are with another lesson. Thank you and as always, very well done.
@charliewakely9440
2 жыл бұрын
Excellent video! One very minor correction; the last production car to use an SU carb was the Reliant Robin, which was made until 2001! There were even a few produced in 2002 by BN plastics.
@luckyPiston
2 жыл бұрын
No mention of how vacuum in the bell chamber rises the piston to increase the size of the venturi allowing more air/fuel into the motor while maintaining high air velocity and atomization at the discharge jet, there is a small orifice in the bottom of the round slide that is the top of the venturi and this is how low pressure is created in the bell ....
@kevinumhey5939
2 жыл бұрын
Very helpful , thanks and well done !!!
@domwarden3443
4 жыл бұрын
Great video. Just to let you know the SU carb was used up until 2001 in the british Reliant Robin 3 wheeler 😊
@55mena
5 ай бұрын
Mi jaguar mk2 1967 3.4 has fuel leak bottom plenum thru the zirk..can you give me some orientation??
@davidburke1794
5 ай бұрын
Datsun was licensed to build SU type card but with fuel pump injection.
@echothegamerguy
10 ай бұрын
su carbs was used all the way to 2002 as the su hs2 was used in the reliant robins till 2002 just so you know but great video
@sowedibrahim2540
3 ай бұрын
Where can I get that electronic valve on the SU cars..mine is dead ...what is it called even
@MICHAELSMITH-ot3tc
Жыл бұрын
Hi Good video I may have got the dash pots mixed up on the Mk 11 How can I check if the right ones are on the carbs Mike
@harrygatto
11 ай бұрын
Very few people know what SU is an abbreviation of.
@2316-t8u
2 жыл бұрын
I've seen some SU's with a jet lever, what are they for if someone can help me
@stephenborsbey4350
4 жыл бұрын
very well explained. the needle can also be worn i am told.
@LivingWithAClassic
4 жыл бұрын
Thank you! Yes they can wear. When rebuilding I recommend checking the tolerances or simply replacing the needles
@-KN1GHTMARE
Жыл бұрын
Awesome video 🤘
@TrojanBus
3 жыл бұрын
Hi, I have a 1979 Spitfire with twin SU Carbs and I am wondering if the metering needles are correct. They seem to angle very slightly to one side. I have unscrewed the grub screw and tried to adjust them but that hasn't done anything. I wonder if the guide/sleeves are too loose or the little springs that give the needles tension are too worn? Or is a slight angle to the needles normal? I thought they should go directly down into the jet orifice. Any suggestions would be great. Thanks. Rob
@dukecraig2402
4 жыл бұрын
On a Harley Davidson these carburetor's are absolutely without peer, no other carburetor will give the throttle response on one like an SU will, especially on the older Harley's, the ports were too big for the engines needs and as a result port velocity was too low, the constant velocity principle of their operation really helps the older one's with throttle response. Back in the day we used to scrounge around junk yards looking for them on wrecked European cars with the prize being a 2" version from off of an E type Jaguar, there is however an aftermarket supplier of performance parts for Harley's called Rivera Engineering that offers them in kits for different models of Harley's, they take brand new ones and do a few simple modifications required to make them motorcycle friendly like provide the correct type of throttle cable brackets and an intake manifold so you don't have to modify one to work, in '97 they started offering the improved version that doesn't have the troublesome bushings in the dash pot and instead has a caged ball bearing assembly and they also don't require an oil level in them like the earlier ones. In the late 80's Keihin designed a carburetor for Harley that's a sort of hybrid between a regular butterfly type carburetor and an SU, the idle and intermediate fuel circuits work like a conventional carburetor with the slide stayed closed but once it transitions through them then the vacuum operated slide with it's same type of needle configuration as an SU takes over. There's even a guy in Daytona Beach named Carl Marrow who owns Carl's Speed Shop who makes performance Harley parts that sells his own version of an SU called a Typhoon. And the fact that they just look cool as hell on a Harley with that big dash pot sticking up on them doesn't hurt one bit either.
@kellybreen5526
4 жыл бұрын
MG Midget owner and I love these caburettors. I am not a mechanic but I can fool people when I fix these things. English cars are easy to work on once you forget all your habits you learned working on American cars. Very simple but very different.
@nilslarsson4266
4 жыл бұрын
Hi Adam, very good. I have a problem with engine on idle and found that on one of the carbs at the bottom of the piston there is a small (5 mm) plastic stopper that was damaged, thus there where no clearance between piston and "nozzlebridge", resulting in no fuel delivery by this carb. I heard that in later SU HS8 production, this plastic piece was replaced by a brass stopper. My question is what should the clearance between piston and bridge be. Im looking at putting a brass screw there and file it down to dimension. Best regards Nils
@fredrowan922
2 жыл бұрын
I have a SU H2 (I think) off a 19630MG midget. It has 3 -4 brass lines out of the bowl. I assume 2 are for fuel, what are the others?
@Toms_Short_Movies
4 жыл бұрын
Just trying to get a Midget running after 15 years. Both needles were dirty and float bowls. Would you expect fuel to flow up through the jets with the needle's and casing off? The pump is on and filling the float bowls.
@autopositivesolutions8681
3 жыл бұрын
Hi my twin su carbs on my mini is iddle-ing very high. I tried all setting on absolute minimum and still its high. what could be the problem. After my cylinder head came back I had this issue.
@wernerdanler2742
3 жыл бұрын
That was a very good demo of how the carb works and it is very simple. However, I am not quite sure how the piston goes up and down. There is that spring of course to help it go up but what exactly draws it back down when you let off the throttle? Is there an internal vacuum line to the top of the piston so that when you step on the throttle it draws the piston up and then reduces the vacuum as you let off?
@fabrisoto
5 ай бұрын
👏🏽👏🏽👏🏽👏🏽👏🏽👏🏽
@davehitchman5171
4 жыл бұрын
My car wouldnt start, turned out the valve letting the petrol in had blocked... simply blown through - not that the petrol residue tasted nice
@1qazandrew333
3 ай бұрын
Super helpful... working on my mini's twin SU carbs now!
@davehitchman5171
4 жыл бұрын
The cable connections are the worst thing, the aligning the needle and jet is also a pain... but overall they just work and they are a dream to tune
@jeffharrison5265
3 жыл бұрын
I just watched this video, great info. Makes my wish I had SU's instead of the Zenith Stromberg carbs the US market got stuck with.
@martingibb517
3 жыл бұрын
Great video thanks. Nice simple carbs, always liked and trusted them, very reliable.
@classicjalopy
4 жыл бұрын
nice explanation, thanks.
@LivingWithAClassic
4 жыл бұрын
I'm glad you liked it!
@mypugsdad5366
2 жыл бұрын
having had British cars with SU's one question . How come they don't need a accelerator pump?
@alexandrecouture2462
2 жыл бұрын
The oil slows down the movement of the needle (as well as the acceleration), so no accelerator pump is needed.
@mypugsdad5366
2 жыл бұрын
@@alexandrecouture2462 Hay thanks I kind figured that to some degree. But glad you seconded my feeling. Thanks again.
@littleallin8010
3 жыл бұрын
Hello how much oil should I put in the carb and how often do I need to put oil in it.
@billrea66
Жыл бұрын
Good video . My '75 R-R has 2 - S,U carbs .
@LivingWithAClassic
Жыл бұрын
I’m glad you liked it!
@GT-Bob
4 жыл бұрын
Thank you. Very useful and clear.
@frankmummolo7727
4 жыл бұрын
Great job! I am having some carb issues with a vintage motorcycle (not SU carbs) and this explanation is helping me to know where to look. Thank you!
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