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wfot · 03-15-2021

I have spoken to Marc about this personally, a very nicely detailed runner will be about 45 HP over the 35HP posted on his site and yes, 10 less for the 93 - 95 versions.

I have been looking at the differences between the 375 vs 405 housings and finds that the secondary runners are very similar, however the primary runners on the 405hp have much more volume..measured in ML. secondaries are both 80 ML and the 375HP primary about 70ML and the 405HP primary is about 80ML. the 405HP runners seem to be much more equal in volume as far as primary vs secondary.

Pete seems to do more extensive work with a 37mm port and I would doubt that there is an honest 50HP hiding in those housings.... hence this tread...

John

03-15-2021	#40
wfot Join Date: Jan 2009 Location: New jersey Posts: 156	Re: porting injector housings to 36MM I have spoken to Marc about this personally, a very nicely detailed runner will be about 45 HP over the 35HP posted on his site and yes, 10 less for the 93 - 95 versions. I have been looking at the differences between the 375 vs 405 housings and finds that the secondary runners are very similar, however the primary runners on the 405hp have much more volume..measured in ML. secondaries are both 80 ML and the 375HP primary about 70ML and the 405HP primary is about 80ML. the 405HP runners seem to be much more equal in volume as far as primary vs secondary. Pete seems to do more extensive work with a 37mm port and I would doubt that there is an honest 50HP hiding in those housings.... hence this tread... John