I have an 85 TPI Z28. I also just happen to have a 400 SBC that I am wanting to put in the Camaro. I was looking for suggestions for Heads, Cam, and Intake setup. I want a daily driver with lots of Torque and at least 400 hp but would like 425-450hp. I am planning on keeping the rpms low. Can anyone let me in on some info. Thank you
five7kid
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Mar 29, 2026
Welcome aboard thirdgen.org.
TPI is limiting even to a 305, let alone a 400. You should figure on hardware upgrades such as larger runners and base, along with porting the plenum. A Holley/Weiand Stealth Ram intake would be a less expensive and more capable change, but tends to raise the RPM powerband.
There are a couple of 400 SBC threads going right now. The really long one has a bunch of information about heads.
TPI is limiting even to a 305, let alone a 400. You should figure on hardware upgrades such as larger runners and base, along with porting the plenum. A Holley/Weiand Stealth Ram intake would be a less expensive and more capable change, but tends to raise the RPM powerband.
There are a couple of 400 SBC threads going right now. The really long one has a bunch of information about heads.
beggin for a stealthram,36lb inj.,AFRs and a nice roller cam(large)
Senior Member
i agree with five7kid your going to need to feed the 400 a heck of alot more than you would the 305 your tpi most likely is coming from can feed for..
but if you get heads and a set of pistons with a decent comp ratio you are going to need a decent size cam and that will up your rpm range as well as the stealth ram.
by keeping the rpms low how low are you talking here?
but if you get heads and a set of pistons with a decent comp ratio you are going to need a decent size cam and that will up your rpm range as well as the stealth ram.
by keeping the rpms low how low are you talking here?