regorih383

iTrader: (21)

i would like if all of you can give me advice on what i should do or what i should change.. and what kind of power it will make ....

what i got...
:383 LT4 block
:Forged 4340 Eagle Crank
:Forged H Beam Rods
:Forged JE Custom pistons .30 over, Flat Top
:MSD 6AL with 8mm Wires
:1.6 RR
:CC 306
:Stage 2 LT1 Heads, 3 Valve angle job,milled, Flow @ 260 at .600 lift
:High Volume Oil Pump
:Stock LT1 Intake Match ported
:30lb. Injectors
:58mm TB
:SLP Mid-Lengh Headers 1 5/8
:3in. Borla Exhaust
:Stock Water Pump
:A/C Delete Pulley
:Stock Fuel Pump, Would like a 255 fuel pump
:Custom Tuning

any input would be great..

car weight is 3400 and has 3.73 , let me know

Vendetta

Sounds like a pretty good setup, I would probably go with a fuel pump and larger injectors to keep the setup open for nitrous Good luck!

kevinb

long tubes + true dual exhaust

Sounds like a nice setup.

DietCoke

iTrader: (18)

Probably around 370 rwhp/ 400tq on an auto, maybe closer to 385/410 with a manual. Those headers are going to choke you

lt1_sickness

i would go long tube headers. also the 58mm tb is over kill i would go with speed and marine 54mm. they make the best tb. i got pretty much the same setup but im gettin afr 195's and a custom cam from comp cam. im lookin for like 500 fwhp maybe little more. you wanna flow as much air in and out less restriction on both ends produces more power!

Vendetta

AS&M makes a 58MM TB as well, which is what I would go with. A 58MM TB isn't overkill when you're flowing lots of air. It wont' do much, but why not pick up a few extra horses with that instead of going with a smaller size? Every little bit helps.

1LOUD98

iTrader: (1)

I have a 58mm on my stock bottom end 350 and it dont hurt it,actually picked 10 on the dyno over stock!And look at what my little ole moter made 438/390 with BIGGER numbers to follow!

lt1_sickness

i don't feel hes got enough flow in and out to use the 58mm like i said before i would get the 54mm. if its to big hes gonna feel lage not instant response!

Camaroholic

iTrader: (1)

I've got a 58mm on my 4.3L L99 motor.

And zero MAP drop at WOT.

Throttle tip-in is a bit interesting tho. If I slam my foot to the floor, velocity is down so it doesn't take off right away. But if I ease in to it, air velocity is higher, and it picks up better.

I had it on my old heads/cam motor (before the boom). Didn't feel like taking it off my intake when I swapped motors.

I say go 58mm. You'll be kicking yourself (or you may end up selling the 54 and buying a 58)...

pmbmax

I have the same bottom end but have AFR heads and cam i designed myself for nos i also have the lt1 edit if you have a laptop best way to go on programing i know alot of guys that have had a lot of driving and cold start issues with tuning from lets say Mr wright. go with 1 3/4 long tubes. I dont know a bought the power you would get with that cam it has better lobe seperation than mine on motor. but mine is a nitrous engine. on the dyno mine only made 348 at the wheels on gas 250 pills it did 613 hp and 597 ft lb torgue. my car has 3.73 also just got back from the pump gas drags and the car went 10.53 @128 and 1.43 short time good luck pmbmax
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