Help required with compression ratio...

[Clarkson]

Andy,

That looks much better,now you have said you have a 3.07 diff, the rpm cam won't work in a 302, you would need a 350 0r a 383 to pull that diff. I have been down this road bofore. I think your right with the XE268 it would work much better. Why are you using rpm heads? have you already bought them? anyway the XE268 and the rpm heads will work great together.This is comp cams best selling street cam. Hope this make sence as I have had a few beers.

David

[adricar2]

andy
i have run that through dyno2003, , also i have tried a slightly larger cam, try a comp cams 270h,and small tube headers, you might be surprised . also there seems to be no or little loss in using a single plane manifold , a lot more top end power. you can always use a spacer plate under the carb to bring the power in sooner.
the cam you are using has only lift at 450 thou that seems a bit on the low size for the rpm heads , well thats my 2 cents .
adrian

[Andy302]

David,


You are making perfect sense, I find a few beers helps clear the mind of non essential thoughts, too many however also does for the essential ones like "how to stand up"!!
Rightly or wrongly I have already purchased the rpm heads and intake, may have a been a hasty decision but hey Im stuck with them now so Ill make the most out of them. I am now warming to the XE268 as the 268H was my choice for a long time the XE is a bit better.

Adrian,

Ill try playing around with the settings you mentioned, Ill also look into the 270H cam as I asked for help Im not going to discount anything until Ive checked it out fully.

As usual this forum is really helpful!! Many thanks to everyone.:thumb:

[Clarkson]

no worries.

david