I have just finished a 383 build with: cam 282 intake/282 exhaust Duration at .050 in. cam lift 224 intake/224 exhaust, Gross valve lift: .465 in. intake/.465 in. exhaust, Lobe separation: 114 degrees, Stock L98 Heads, Ultimate TBI mods, TBI Riser, Injector Spacer, Edlebrock Performer TBI Intake, custom midlength headers, custom Y pipe, 3" flowmaster exhaust w/ Cutout, 3.42 Posi Rear end, open element, !Smog Pump, MSD ignition, 180* T-Stat, Stall Converter (not sure what, feels like 1800 or so), Shift Kit.

I haven't layed into it yet, as it's not broken in, but it sounds nice and feels real agressive down low. I'm hoping for low 13's, high 12's on the outside. It's not as fast as my 11 Sec LS1, but it's BEASTLY down low.

I think this combo is going to make 250 to 300 RWHP and somewhere near 400LB FT torque. I hope I'm looking at low 13's, high 12's on a PERFECT day. Any thoughts?

 

I'm not really sure because I don't know a thing about TBI but I'd have to say 13.40ish with good traction? 290'ish RWHP should be about right if your car weighs 3500-3600lbs.

I'd recommend a little bit more gear and converter. Like 2800-3000RPM stall and 3.73 gears. That would more than likely get you into the low-low 13's maybe 12.80-12.90 on a great day.

 

i'd say around 230 to 250rwhp and times around 13.8.