I have a question for everyone, Im only been on this site for about a week now, and all of you have been a big help thanks. I did a 305 to 350 engine swap about 5years ago, I have a 91 tpi camaro, everything runs fine but as I read in hear it sounds like I should change my knock sensor? would I notice that much of a difference? I dont get a check engine light ever? Also, its about time to change the motor out it has 120,000 on it and I was tying to find out specs on having a motor built with about 350hp to 400hp. Would someone in here have any good specs and info to send to me? thanks for the help.

 

A 305 knock sensor is basically "deaf" when used on a 350, because the 350's bigger bore changes the 'sound' of engine knock, and that sound is not in the frequency range of the 305 knock sensor.

If you use a 350 knock sensor, you will probably notice a good improvement in the engines street manners.

As for making 350-400hp, I wouldn't try to do it with a TPI manifold on top... TPI is just too restrictive to feed an engine enough air to make 400hp.

With TPI, 300-320hp is a more realistic goal. If you are going with a carb or an aftermarket intake, then 350+hp is not hard at all to get out of a 350.

 

Well the stock TPI is restrictive above, say 4500 RPM's I think. A big mouth: manifold, runners, and plenum should eliminate the restriction right?

 

That will help some, but the biggest bottle-neck in the TPI system is the reeeeaaaaallllyyy long intake runners, and there is really no way around that.

 

So, if a have a motor built with 350 hp and I put the tpi setup on it will the engine still run or would it starve for air. I could make a ram air setup on the car and port out the tpi would that help enough.