Other Stuff > Misc / Open

Mr P****s strikes again.

<< < (2/3) > >>

kevski:
I wouldn't go near him again, they like brush on black also.

K2-K6:
I've got it that the exhaust valve guides are important for heat transfer out of the valve as it has no cooling charge going past it like the inlet has.

Ordinarily they leave the ex guide snub nosed to prevent that itself from heating too much as it could with a taper. Even though it causes port restriction, cutting it back I feel is considered where outright port flow is considered above longevity,  ie absolute race performance.
Bronze guides aim for that compromise anyway,  with faster/efficient conductivity favoured over ultimately their lifing.

Perhaps they've good reason to supply as they have, but they should at least be able to explain why and the effect it has, rather than they're all like that sir.

Whether there's enough practical difference as to notice (if not racing it) I'm not sure.

royhall:
What they said was"sold 100s of those sets never had a problem" That makes it right then. Just waiting to hear back from Ape Racing themselves. I bet they say these are for gas flowed heads not standard, even though that's not stated anywhere. We shall see.

royhall:
Well I am surprised. Ape Racing have replied to my email to say that is correct. The dilemma now is do I leave it or change them for standard items. That gap may just fill with carbon I guess.

royhall:
I now have two sellers (who build engines) and the manufacturers themselves saying that gap is correct. Who am I to say otherwise so I am going to go with it and build the engine. But in my head that will never be correct.

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