I am going to be building a 383 or a 350 with a blower I was thinking of going carb but I wanted to know if it was possible to do this with tbi. Also what are you guys going for computers? I am putting a ls1 computer in my 92 z28 with a procharger.

 

Absolutely possible with TBI. The EBL Flash can tune for boost.

 

Ok, so how much can the tbi system handle? I have never really dug into tbi. Can you run a roots type blower with tbi or no? Why doesn't anyone build with the tbi ? Are they harder to get power out of?

 

I would use port injection for that power, it is hard to have 2 injectors deliver extremely alot of fuel at WOT and wery little at idle.

Dual TBI is possible if you are a passionate TBI fan. Otherwise some aftermarket port injection or a modified LT1 intake manifold for exemple, would be simpler.

EBL is also avalable for port injection, it can cotrol boost and many other cool stuff.

 

What is EBL?

Will I need to swap computers to run the lt1 intake or can you pin it to work? What fuel injection systems would you suggest ?

 

I'm with Thomas on this one. It's probably possible, but not very cost-effective. MPFI/TPI would be a better idea. You can get much better flow control having 8 smaller injectors, vs 2 big injectors. I've been looking at ways to realize the power of my engine, which should be pushing close to 300 Horses at the crank, but the 61# stock 350 setup can only really support about 200HP-220HP.

Even if you were to take some 75# injectors out of a 454, run the fuel pressure of to 18psi. Your theoretical limit of what that fuel system can support of is going to be around 327 HP, based on the research I've been doing...

If you're looking for big numbers, TBI can't hold onto that much power without some SERIOUS dedication, and probably more money, in the long run, than a good port injection system.

Also, EBL is a complete tuning solution. It makes it so you can flash your ECM directly, without having to burn chips. You just plug your computer in, and read the datastream directly from the EBL, make changes, and flash it back into the ECM.

It's $350 for a self install (if you can solder), or I think they'll do the install for you. I don't know how much, but I think it's around $30-$50. Check it out here: www.dynamicefi.com

 

Can you run a roots type blower with the lt1 intake or would I need to go to electronic injection?

 

I see now you can't do it to a lt1 without major hacking into intakes and such.


what would be a good injection system to run then? I want to run a roots blower on a forged small block and still be streetable.

 

Your 61# injectors @20-25 psi will work nice for your goal, if you add a VRFPR you can make it run clean as from the factory and pass emission test easy.

Speaking of fuel delivery, 90#/hr TBI injectors @ 30psi FP should be good for 516 FWHP, (I immagine there will be some big fuel drops at idle or maybe even run like a tiny fountain)
Dual would be just over 1000 FWHP.

 

Cool! I wasn't sure how much pressure these injectors could actually take. I've never seen somebody running over 18psi. I don't have to worry about emissions, because this engine is in a boat, but I do need a smooth idle, since it's used to wakeboard behind, and needs to be smooth at idle for setting up to pull a rider, without ripping their arms off.

I'm going to order an FPR this week, since my stock regulator is only pushing 10psi as it is...

 

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