Hello everyone
I am converting over to Tbi I have never tuned before and I have done a lot of reading and found good information here.

Would anyone be willing to help me or give me a good starter Bin file for my set up to realy give me a good head start? Eny help would be greatly apreciated..
Thanks in advance..

My specs

Sbc 383 stroker bored .30 over 12cc dish Pistons 10:1 compression

Procomp heads 200cc runners 64cc chambers holley airgap intake

Howards Cam. .488/.507 lift
.235/243 dur @ .050
Tunerpro rt all moates equipment

Ecu 93-95 5.7 truck/van 16197427. Auto Trans bpsa
95 bored out 454 Tbi 30psi spring #90 injectors

Can anyone help me please?

 

Def file I believe to be $0D. 7.4L truck. May want to find a 7.4L .bin at Gearhead EFI for a auto trans. Then change the BPC for CID and FP.

 

Any progress on this?

I'm actually considering a 454 TBI from SPR to convert my '79 T/A Pontiac 400 4spd to TBI. I'm, however, using Megasquirt as my computer system.

 

I have my doubts that TBI will flow sufficiently for that CID. Might want to look at port fuel. I converted from TBI to PF and the throttle response was much improved

 

I understand that port injection would clean up fuel distribution and make for clean response but I don't get the CID argument. I'm talking about running 454 TBI unit on a 400. My 400, however is set up to make more power than a TBI 454.

 

The 454 TB was sized for a truck that maybe never sees much over 5000 rpms if that. The 2.0 inch TB's are shrouded by the injector pod so not really 2.0. One way to determine if TB's are too small is to do a key on and check the MAP reading. 100 MAP is at sea level. If you are above SL it may show say 97. Full throttle if it reads under 97 then there is a restriction. I ran a 7.4L/454 TB and there was a restriction. Engine shifts at 5800 per comp cam. I made the conversion to that 7.4L TBI system. In hind sight I should have gone PF instead of 7.4L TBI and save the expense and time. My intake was a Holley projection and heads are Edel RPM.

 

Out of curiosity, how much power is your engine set up to make?

It seems like there's just a lot of mixed information on the TBI subject. SPR's website claims about 450hp being the max power limit for one of these units but I see differing opinions on different forums. Their ebay store claims 750cfm.

I would think that running one of these on a performance engine with single plane intake would make for nice throttle response, clean up fuel distribution across cylinders and just maximize the overall output capability. I haven't really seen this done too much besides on the Megasquirt Nova budget build...that one used an SBC TBI on a Torker II intake though.

 

I currently run a SP Edel Vic Jr EFI manifold. Edel 1000 cfm universal TB.

cam is 224/230 @ .05 flat tappet 114 lsa.. Roller rockers 1.6. Dual ext with crossover 2.25 inch. Hedman headers 1+5/8. N20 @ 100 hp. Engine alone should be 375 HP a guess. I never had on dyno. Daily driver.