1990 Camaro RS TBI
stock 700R4
3.73 posi
350 .040 over zero decked
10.5:1 comp
.508/.511 lift w/1.6 full rollers, 228 231 duration
CNC bowl blended ported and polished 2.02 1.6
190 cc intake runners, 64 cc combustion chambers,
Holley 670cfm throttle body, edelbrock performer intake, 2200 stall converter

What do you think i'll run at 6000ft?

 

you're gonna need ALOT more stall probably 3500 with that much duration. With that setup and a tbi unit at that altitude i'd say high 12's low 13's

 

 

I think a 3000 stall would be fine too. Just depends, my Vortec headed 350 had a camshaft with 230/236@.050 and it did well with a 3000 converter. It bested 12.28@111.85, I don't see why you can't obtain similar results depending on raceweight and the cylinder heads you have chosen.

 

My plan through this build was to keep the car streetable, I figured if I went with too much stall, I would lose all streetability. Oh, yeah i forgot to add that the heads are Patriot Aluminums.

 

way more stall, get a single plain intake for TBI, ditch that junk performer. I bet it would run a lot faster with a carb instead of restrictive tbi. Hope you plan on bigger injectors, more fuel pressure and a TON of chip burning.

 

I like fuel injection for the better throttle response and improved reliability. The throttle body is going to flow 670 cfm, more than I will ever need, even at over 100 percent volumetric effency.

 

from the 30s to the early 80s people putted around on carbs, i'm sure they're more than reliable. Throttle response won't be noticeable either I sure hope you're really good at burning chips because that is a huge cam for a tbi system to support. I would imagine a 750cfm carb would be a good choice for that engine, but good luck on your tbi endeavor.

 

Ever driven a carb car? The throttle response is NOT sluggish by any means.

My carb has never given me any trouble (and if it did, it was my fault).

 

Well, I bit the bullet and put a carb on it. It's up and and running now. The prom game isn't worth the hassel.

 

so you put a 750 double pumper on there? I hope you didn't buy a vacuum secondary carb.

 

Well, funny story. I got a smokin deal on a edelbrock 650 vacuum secondary with preassure regulator for $100. Thats what's on the car right now, and i'm pretty happy with it, but...my uncle just brought by a holley 750 double pumper. It's been sitting in his garage for a couple years and needs rebuilt, but who am I to complain about a free carb? I'm going to tear it down and rebuild it, and slap it on.