Will a cylinder head from an Infinity G20 interchange with the one on my redtop sr20det? Are there any differences internally? (cams, valves, etc)
Thanks!

The head will bolt on but there are too many other differences to make it practical. Intake manifold points the wrong way, distributor location against the firewall, etc.

Shouldn't be too hard to find a spare redtop head, or a spare engine for that matter. Much simpler.

couldnt u just swich everything else from the red top head to the G20 head like the cas and cams and what not....i do know that the valves are different on the exhaust side I think...7mm instead of the 6mm do to the sodium filled thing
cams I think are a bit more aggresive on the red top
what happen to yours

-Cams might be the same, depends on year.
-Intake manifold should switch
-The distributor problem cannot be overcome easily. It's in a completely different location and driven by different means on the two heads. You'd need a CAS from whatever car the VE-on-RWD-block guys are using, and custom engine management. NOT a bolt-on, no matter what.

ive seen that where *** cas normaly goes on the RWD DET, the FWD head has a cover so if he uses the cam from the red top asuming its good it just might work, I havent seen them side by side so I coulndt tell right of the top of my head :rofl:

It still wouldn't work. The RWD cam doesn't have the notch on the end to drive the FWD distributor, and the RWD CAS can't be driven by the notch on the FWD cam because it's gear-driven. The FWD distributor wouldn't fit against the firewall and the ECU wouldn't know what to do with it anyway.

The guys who are running VE heads on a RWD block are using a CAS from a Toyota or something (can't remember) and full-on standalone engine management.

no no you are still not undertanding me I know that a rwd cam cant run the dizzy but if he uses the rwd cam that does have the gear to drive the cas and uses that cam on the fwd head and takes off the cover where the cas originaly goes that should work, I dont know about everythin else....im shure someone has come up to this but isnt posting...give it a bit more time

I fear that it is you who don't understand.

First, I can't remember whether the gear is part of the cam or part of the cam gear, but there's actually extra room in that end of the head on the RWD motor that isn't there on the FWD. You can see it when you compare the valve covers too, the part that goes over the cam gears is wider on the RWD than FWD. Also, there's no "cover" on the FWD head where the CAS goes in on the RWD head, like you could remove it and have it work. You'd have to drill a hole in the side of the head and figure out how to secure the CAS.

Sorry but this dog don't hunt. Think of one more thing - if it was cheap or easy to use the FWD SR engine or head in a RWD car, wouldn't more people be doing it?

maybe but how often do heads on sr20dets go bad...im not trying to argue or anything im just going by what ive seen not that I know I just thought it would work, i know ive seen that cover on the head where the cas goes I know im not crazy, it might be something else but there is something there but im not happy and im going to have to get a hold of a fwd head to compare to my rwd red top head

aaaaaaaa ok I see what you mean about not having any room for *** CAS, so that dosnt work.
and yeah defenetly way more trouble to try to make it work than just finding a Red Top RWD head :rofl: