MaroNut383

needed some theories, before the car is done,how fast should i go on a 10:1 383 , with 4:10 gears,th400 and some slicks?

brodyscamaro

Details anyone?

sasser43

I'd try asking the people on the organized drag racing boards. I'm sure they can help you more with ETs.

Orr89RocZ

iTrader: (20)

if you got 500 crank hp on a mostly full weight camaro... assuming about 3500lb race weight... your looking at 117-119 mph traps and mid to lower 11's.. with 4.10's and slicks on a th400, more like low 11's

ShiftyCapone

iTrader: (7)

Agreed.

We need a few more details.

Race weight?
Posi?


As mentioned, with the right set-up, 500hp in a 3rd gen could yeild 11's.

84firebird383

My approximately 500 flywheel HP 383 dropped into a stock 84 firebird with a 3.73 posi and a th350 went 11.3@121.on a set of free used up slicks.I had just found out the other day that I had been running with a bent rod.I'm hoping to be faster now with a fresh rebuild and a few suspension mods.

EvoTech1

500 hp out of a 383?

Really?

Lets hear some details of this motor, because most 383's I know of may have make 400+ ftlb, but not 500+hp

I would expect to see this car run low 13's high 12's in street trim, sans a bottle or some really good heads. Then I'd believe 500 hp.

lets hear it. what you got?

Orr89RocZ

iTrader: (20)

really?

500 hp out of a 383 isnt too hard at all.... just good heads, intake and decent sized cam.. should make near 500crank hp at 6000rpms

lilbowilson

iTrader: (2)

I've also been doing my research for the 500hp 383 myself. An I found that even with good heads, intake and cam a lot of 383s fall short from the 500hp mark. I guess some engine builders can do it better than others thats why when I start my 383 my $2000 ported heads should make it easier for me to reach my 500hp goal.

Orr89RocZ

iTrader: (20)

yes, your gonna need some great flowing heads... something like AFR or mildly ported trick flows.. needs to flow over 260cfm at peak and have lots of low lift flow as well. also a decent intake to exhaust ratio.

next would be a intake to support a motor to 6500rpms. like miniram or HSR, or carbed intakes
comp cams XE282 roller which specs out at like 236/242 and abit over .550 lift with 1.6 rockers will get u near 500hp. it needs to be tuned tho. the tune will make the combo...

else maybe a slightly bigger cam like a zzx cam--239/239 i think or something near 240duration. once u get that big, its best to go solid roller. if not, look into a hydra rev kit.


thats your 500hp 383

brodyscamaro

It's called busting out the credit card or checkbook when it comes time to buy heads...

DON 88T/A

There's a sticky in the TPI section a 383 HSR/ mini-ram setup did 500 crank @6000rpm with trickflows and a 236/240 cam....I don't know the head specs But I don't think they were very big heads (195cc?) and the mini-ram was with 52mm Tb..costing a few poinys...plus this whole set-up was really for a 350...The TPI in that set-up did 460hp...and these set-ups were tuned by a magazine so you know there was more on the table....like said...good set of heads/decent cam/good tune/proper intake....no problem.

AC

iTrader: (3)

Alright guys, now you have my interest on this. I know my 383 will probably make closer to 650 at the flywheel (read my specs). I'm in final stages of putting the car back together. I'm only waiting for my driveshaft to get finished and then I can fab up my exhaust (either single 4" or dual 2.5" ) .Anyway, any guesses on this setup for the 1/4?
Engine:
4bolt 1pc rear seal 350 block .030 over
Eagle Forged / Balanced 383 assembly
H-Beam Rods
-16cc Pistons
TPIS Bigmouth Intake
SLP Siamesed Runners
Holley 58mm throttle Body
Siemens 60lb injectors
MSD 6AL
Dart Iron Eagle Heads (215cc / 72cc)
Hooker Super Comp 2210 LT Headers
Harland Sharp 1.5 RR's
Blower: ATI P1SC / 14lb pulley
2 core intercooler
custom prom of course....

Custom Comp Cam
Int: .520 / Exh .540
Duration Int.236 Exh.248
LSA: 113

Suspension:
Spohn Torque adjustable torque arm with ds safety loop
Spohn Adjustable panhard rod
Spohn Lower rear control arms

Drivetrain:
TKO600
Spec (Forenza) Flywheel
Spec Stage III clutch

Rearend: Stock 10bolt with 3.23's (can you say KABOOM!!)

leeperryracing

that combo will give you a very honest 550-600hp if tuned properly, that cam will be a beast with the blower!

Orr89RocZ

iTrader: (20)

thats a big old cam for a blower setup.... i usually see smaller cams than that in blower cars but at 14lbs and that setup your gonna have close to 600-650 i'd say. thats good for 550 at the wheels give or take. but your torque curve will be unreal! TPI and a blower will make gobs of torque.

with the proper suspension.. being setup with drag racing in mind with slicks, and full weight, about 3500lbs or so, i can see well into the 10's at over 130mph

leeperryracing

I agree.

rx7speed

my best guess you could be running between 14seconds to 10 seconds


does it sound a little vauge? if so check out how much information you gave

EvoTech1

you should forget the th400 if this will be any kind of a driver, because even a 3 speed with a 3.42 gear will KILL gas mileage. Go with an OD like a 200 4r or whatever out of the GN and ss cars. They are cheaper to build to that power level, and will have a less crazy 1st gear than the 700r4.

Would he run out of gear with a 3 speed, and 4.10's? Most 383's ive seen are torque motors, and dont hit more than 6k. Wouldnt 4.10's be happier on a smaller high-spinning top end motor?

i guess with the right heads and cam, any motor would spin up like that.

leeperryracing

for that combo there is only 3 logical tranny choices: a built 700r4 w/3.42's or a t-56 w/4.10's or a built th-400 w/ 3.73's and a gear vendors overdrive unit. Of the three choices the th-400 setup would be the most bullet-proof.

Orr89RocZ

iTrader: (20)

a 383 can rev high to 6K+ rpms... and with 4.10s and a 26inch tall tire.. the car will be crossing the line at just over 6K rpms which isnt too bad, as his peak power should be near that anyway. my guess is that he will trap near 118-120mph with the right suspension. 500crank hp is like 400-430 at the wheels. Ls1 cars with taht power are 120mph cars. 120mph in a th400 with 4.10's and 26inch tires is like 6400rpms. i'd say those gears are about good for that combo. maybe if possible, a 27inch tall tire would help more. 28 would be like having 3.73's in a 26 in tire.

but either gear will work.. 3.73's and 26 inch tire might trap at just below peak rpms.. while the 4.10's just over peak. it all depends on where that peak hp rpm is tho.. but from what i seen, n/a 383's and 500hp means 6000+rpm

85SILVERBULLET

my set up will spin 7k no problem... it will go above but my springs are only good to 7500...

lilbowilson

iTrader: (2)

What kind of DEMON are you driving!

fireturd350

iTrader: (8)

I'm also interested in your combo. I'm also building a 383 I hope it will beable to snap 7k+ RPMs. Mine is 4340 forged bottom internally balanced, AFR 210 RR heads, big solid roller stick, stud girdles, rev kit, and a victor jr.

Orr89RocZ

iTrader: (20)

yes it will, you have a very big solid cam in that thing

85SILVERBULLET

the old cam that was in the veh was a crane solid flat tappet cam. specs:242-252@50 and the lift was 572 w/ a 1-6 rocker. the new mechanical roller cam is a comp 242-248@50 and the lift is 610-616 w/ 1-6 rocker. the roller cam is going to hit a little lower 2500-7000 and the old cam hit a little later 3200-7200. Its all about matching components. any of you tpi guys will have a hard time with this kind of rpm due to the fact that the runners will not let it happen. I have a super victor style intake that is matched to the heads and i have close to 11-1 comp ratio. With the right valve springs, flow ,carb, intake, cam, heads, and comp ratio 9k would be reasonable.
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you should have no problem....