full k24a2 build with dyno sheet.

[1GR8EP3]

I think what BA meant was the flow characteristics of a k20a2 head will allow the stg2 cams to run at there full potential. There is a link showing the difference between a k24a2, k20a2, and a k24a1 head... but for some reason it wont let me post the graph.

[Ba82Ep3]

Good call Q. Its not so much the combustion chambers, even though there is a difference there, its the runner design. The k24a2 head works best with its longer runner manifold to produce TQ and midrange. The k24a2 head flows less than the k20a2 head, and the k24a1 head flows the best up to 7krpm. The BC stg2 cams would work better with his RBC and either a k20a2 or k24a1 head. Or... reinstall the k24a2 cams for the k24a2 head and the RBC... and retune (of course).

If the BC stg2 profiles are the same as when i had them... then he might do better going with a PRC mani over the RBC too. It depends though... i didnt have an RBC to test back then. The TQ curve looks a little weak from 3 to 6krpm... could be cam angle or the fact the tuner didnt do a lot of work with ignition advance. Its hard to say.

[lemonhead228]

Good call Q. Its not so much the combustion chambers, even though there is a difference there, its the runner design. The k24a2 head works best with its longer runner manifold to produce TQ and midrange. The k24a2 head flows less than the k20a2 head, and the k24a1 head flows the best up to 7krpm. The BC stg2 cams would work better with his RBC and either a k20a2 or k24a1 head. Or... reinstall the k24a2 cams for the k24a2 head and the RBC... and retune (of course).

If the BC stg2 profiles are the same as when i had them... then he might do better going with a PRC mani over the RBC too. It depends though... i didnt have an RBC to test back then. The TQ curve looks a little weak from 3 to 6krpm... could be cam angle or the fact the tuner didnt do a lot of work with ignition advance. Its hard to say.

yea k20s are putting out that much but swapping at k20a2 head on it would definitely make a difference. tuning it on a 100 degree day doesn't help either.