TBIThrottle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.
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i have a 92' silverado and want it to get close to 350Hp, i wanted to know what i should about the tbi, should i buy one, if so what kind, or should i modify the stock one?price difference? performance difference?one more question, does the casper electronics' TPS sensor enhancer really work?i hope so,lol.
__________________ 92' Silverado 350,Flowmaster 2 chamber true dual no cats,jet stage 2, street & performance elec. helix power tower,Casper elec. throttle response calibrator, Dynomax headers with Flowmaster collectors
I don't think the stock TBI can handle that much horse power. I don't know of anyone personally that has achieved above 320hp w/ a 2 bbl TBI, though I don't think to many have tried. In theory, either a Holley 670 or a 454 tbi will handle that much power, you're just gonna need some huge injectors, in the 85-90pph range.
As far as the TPS thing-If it's what I'm thinking it is, it tells the computer you're at full throttle when you're really only at half. I would think that that would be bad and make you run rich, i.e. too much fuel and not enough air.
ok, well what would be the best for my truck? any ideas?beside the 454 tbi and the holley, is there a tbi i can bolt on with little mods or none that would give me the best performance?
Well if you don't want to get the holley 670 or the big block tbi then really the only other option you're left with is your stock 1 11/16" bore throttle body. I suppose theoretically you may be able to support that kind of power with it, just make sure you do all the Ultimate TBI Mods in the tech articles on this page and you will definitely want some bigger injectors.
I'm making a little over 300hp with the Turbo City throttle body.
It's a ported stock tb with bigger throttle plates installed. http://www.turbocity.com/TBIPowerMain.htm
It bolts up to the Edelbrock Performer TBI Intake intake.
-Rich-
what are u running 300hp in Rich? if its for a truck, which one exactly is it? so i should also get an intake huh.i think i wanna go with the ultimate mods thing...... ok tell u the truth, i just want to buy it, wether its aftermarket or stock with ultmate mods, and bolt it on(im not a machenic but i can learn quick)but from what i see, i just cant do that huh, i would have to do something with the fuel curve and all other stuff huh......?it all sounds complicated,lol. but i can deal with it, i just thought it was gonna as simple as bolting on another tbi....... :hail:
hey if i get the edlebrock 670, will i have to get new injectors, or do they come with it? and also, will i have to mess with nthing else once installed, like air/fuel or nthing else? i think im leaning torward that tbi.
p.s. how does the turbocity site work? i mean i see something saying about a core deposit?confused.....
just pay the $429 that they want, then after you install the new Throttle Body, just send in the core and get your $200 back, assuming you have the $429 to spend up front.
OR,
buy a core Throttle body and have it bored for 2" butterflies. You can order beutterflies from Jegs, last ones I bought were like $10, and the machine shop got $50 for their work. Alot more work involved but alot cheaper.
Check my sig, I've got the holley 670 (ported) and 85 pph injectors (cranked up to 105 pph approx). I haven't hit a dyno yet, but I really do think I'm right around 400 hp at flywheel. With a corrected time of 13.6s in the 1/4 from a 4400lb truck , I must have OK power.
