Thanks for the no thrills in depth insigh! Much appreciated as always! Your comparisons are awesome. Similarly excellent as the recent oil pump video.
@warrenlucier5796
6 ай бұрын
Would have liked to have seem the MA1/9A1 head in the comparison also.
@drs2000rr
3 жыл бұрын
Martin, happy holidays. Thanks for such an informative video, Porsche really took their time to engineer, a cost effective solution incorporating the castings. I’m very interested in the valve spring specs, heights, psi rates ,diameters and difference in the m96/76-79 and the m96/1-4 engines. Looking to upgrade my x51 modified m96/04 engine with the upgraded valve springs for the gt3. What have you been able to measure and compare. Cheers.
@kayvon_is_likes
2 жыл бұрын
Big thanks for this. Just what I was after. So whilst the GT3 can vary the cam timing in relation to the crank the Carrera can also vary phase between the inlet and exhaust valves? What is the mileage before wear like on the GT3's chain guide? Also, can the Carrera adjust the inlet timing vs the crank position? cheers.
@martinhill5770
2 жыл бұрын
Both the carrera and the GT/turbo engines vary the timing of the inlet camshaft relative to the crankshaft, whilst running fixed timing on the exhaust. The differences in the way they do it mean that the carrera system is on/off whereas the GT/turbo one is variable. The turbo also has the addition of the switchable cam lobes which neither the GT3 or the carrera has on the 3.4l engines.
@kayvon_is_likes
2 жыл бұрын
@@martinhill5770 thanks for the reply, apologies if it was a slightly confused question.
@Van-tastic
3 жыл бұрын
So, I’m back to this video again after watching your latest one. I’ve got my exhaust back from ceramic coating and after looking at that channel between the exhaust ports again, I’ve decided I hate the secondary air injection system and I want it gone from my life! Any advice on how to kill it without getting arrested lol?
@Van-tastic
3 жыл бұрын
How’s the scavenger pump coming ?
@martinhill5770
3 жыл бұрын
Running it in my pink car and in another car. All good so far, just want more miles on them.
@Van-tastic
3 жыл бұрын
@@martinhill5770 you need to send one to me! Then we can double the miles lol!
@Van-tastic
3 жыл бұрын
Could you please explain what is going on with that channel between the exhaust ports and why it’s only on the 996 and 997.1?
@Van-tastic
3 жыл бұрын
@Emrys Dwyer how that work? It just runs between the ports and nowhere else
@Van-tastic
3 жыл бұрын
But why a grooved channel that runs between all three ports? It seems detrimental to cylinder scavenging. Additionally, how do you "inject" filtered air into the exhaust on a naturally aspirated engine? MAP is always at a vacuum.
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