I am building Blown 383 93 formula. I just purchased an intake manifold that is 94 plus. I was going to port it, but I want to make sure that I can use the 94 w/ m y speed density setup.
http://speeddensity.org/showthread.php?t=679

I doubt I can use it but lemme know if i am wrong!

 

To clarify, I Have a 94 manifold w/ fuel rails that I got for 50 bucks. I would like to know if I can use this manifold (w/ the batch fire rails) with my setup. basically will all of my crap bolt up and run right. Id like to put together my motor before I pull the old one.


also, can a tpi throttle body be used on a 93?

 

It bolts on just fine. You'll have to 'adjust' the fuel lines as they attach at a different spot and the FP regulator is at a different spot but it won't make a difference. You'll either have to switch to the 93's injectors or re-tune to use the 94's larger ones.

people have switched to speed density with 94+ cars and have no issues...you can as well.

Now the question. Why are you bothering? You can port your 93 manifold easily enough and I doubt the 94+ manifolds offer higher performance over your '93 parts....

 

My understanding is the 93 rail is restrictive compared to the 94+ so not only can you do this but the higher capacity rail may be of benefit on a blown stroker.

On the other hand the 93 intake doesn't have the crossover trough right behind the TB so it might be slightly better.

 

The 93 rails are designed for "batch flow" hydraulics. The 94 and up rails are designed for "sequential flow" hydraulics. There's a significant difference in the pressure profile when you are pulsing 4 injectors at once, vs. pulsing the one at a time. Whether you will notice a difference will only become obvious after you build it and can inspect the plugs, looking for differnces in the A/F ratio from cylinder to cylinder.

 

The cylinder to cylinder balance on a stout LT1 is so poor to begin with I doubt using a rail designed for one stock system vs the other would improve anything. I was talking total volume flow.

Besides the LT1 goes into batch at WOT rpms anyway. It is sequential at low idle and cruise rpms.

 

First time I've ever heard that.

 

I have a set of 42 lb injectors in the garage still in the package. I also am going to have my car retuned anyhow because I am going from stock to 383 procharged.

My 93 lt1 is running and in my car. My 383 short block is sitting on a pallet in my garage. I want the least amount of down time for my car, so if I assemble my 383 before I even drop my 350 lt1, i wont be waiting on the Intake manifold to get ported. My friend are kinda flaky, so when I drop the Engine we can just start putting in the other one.

 

I was thinking of new rails anyhow.

It doesnt have the trough for the x over


Thanks!