jbates346

I have used the search function, I've gotten some information but would like to go slightly deeper. I am interested in building a 350 Crossfire for my V8 Chevy S10. I have seen some thread on here talking about using newer TBI computers, so that could be an option. I would like to have a mild cam, so I think a smarter computer or one that I could reflash easily would be better (not having to burn a new chip, just uploading a tune). I was looking at the FAST 302000-06 system for my IROC build, and I think that would be perfect if we can somehow make it work for the Crossfire. A couple of questions are, how does the computer control the throttle bodies? Is it batch fire or does it command the injectors at the same time? I was thinking maybe I could just splice into that circuit if it was not? That said I would also like to upgrade the throttle bodies, maybe to some ported 350 ones, or the BBC ones. Again, just trying to get some ideas or suggestions on different computers I could use to fire the motor a little more accurate. I wrote down below currently what I am trying to achieve with this thing. Its not 100% locked in, but just to give you guys an idea. I thank you all for your constructive input.

350 Roller motor
180-200cc aluminum heads
GM hot cam or similar Hyd roller cam (summit 8802)
Ported intake or Renegade if I can find one
Would like around 350hp/375 torque

aliceempire

iTrader: (14)

Personally would look into ebl flash and use a modified tbi harness. l'm 90% sure that can be made to work. Search for "L83 tuning ebl" I know there's a thread on ebl and a crossfire being done.
Crossfire injection is easily the most difficult efi to make power with on a sbc, so it's a larger uphill battle compared to just about anything else. Little to no aftermarket support, but it can be done.

jbates346

Great info, thank you! I will absolutely look into that and check out that thread. That might fit what we are trying to accomplish.


Justin

Komet

I don't think you're going to hit your power goals with crossfire. It doesn't flow like the dual quad cross ram setup from the old z28s; the only cool thing going for it is the name.

If you want sequential fuel injection, you will need 8 individual port fuel injectors and a way of knowing what position the cam and/or crank are in at all times. Without that data, you are limited to batch fire. I suggest some of the intake designs that look similar to dual or single plane intakes, but designed with fuel injector bungs. Also consider the stealth ram, miniram, and first setups. It will be much easier to get started, tune, and get help with a setup like those using any of the various modern ecm solutions than it will trying to resurrect disappointing dinosaur injection.

KITT1983

iTrader: (3)

I would go msd or holley tbi kit

jbates346

I was actually looking at those too.