I have recently installed a 383 in my 69 chevelle. spec are

bottom end: 11 to 1, 4 bolt main, with a 1pcs main
Scat 9000 crack, scat 5.7 5140 forged rods, forged speed pro pistons, all with arp bolts, all is blue printed and balanced

Top end: Dart 215cc iron eagle heads, with 2.05 & 1.60 vaules, the heads have a mild port job. (pocket porting) The cam is a roller crane, spec are 234/242 at .050 .539"/.558" lift. 1.6 roller rocker, stud gridles, victor jr intake, 750cfm holley double pumper. full msd, headers, 2 1/2" exhaust.

Trans: th350 3000 stall, shift kit

rear end: 12bolt posi 3.90

With this set-up the car went 12.7sec with 3.08 out back. I have installed the 3.90's. I want the car to break the 11 sec mark. what should i do to make the car faster in the quarter, but keep so I can drive it on the street too.

The 3.90 will help alot, was it this same exact combo, just freshened it up?

Go with an electric fuel pump if you don't already have one. Other than that..gears will definitely get you there.

What's your MPH?
60 ft. ?
Have you been back to the track since the gear install?

Originally posted by 383Vette:
Go with an electric fuel pump if you don't already have one. Other than that..gears will definitely get you there. No need to go electric, don`t even bother.
A good mech pump will be all you`ll probably ever need.

60ft time was 1.94 with slicks
kph was 101.39

I am alreadly running a red holley fuel pump. I was thinking of changing my vic jr. to a super vic. And maybe a 850cfm demon.

It would probably run quicker with the Performer RPM air gap, and a 750 is plenty of carburetor.

You need to some tuning..is the 1.94 60 ft. with the 3.08's?

I already had a rpm air gap, but the machine shop told me that I would get more power with the vic jr. Yes, the 60ft time it with the 3.08's, spinning the slicks. I think that I my need to upgrade to a bigger fuel pump and replace the stock line with something bigger.

A 12.7 at 101 mph with a 1.94 60ft is not right, it seems to me that your combo is a bit sluggish off the line (street tires? or poor traction?)and isn't pulling hard on the top end. I would check the fuel delivery system and timing. With my 84 (in the sig), a bad air day at 2300ft netted me a 13.03 at 103.5 MPH, 1.84 60ft.

He, He!!

What's that old movie, "Animal House's" road trip chant?? "Big Block, Big Block!!"

Come to the "Dark Side" b/c the "Force" is Strong!!

I just had to, please carry-on...

pdq67

The 850 would be too big. Do you still have a 10 bolt in that thing?

We have a very similar combo with a few exceptions. My car rans 1.68-1.70 with a best of 1.66 60's and 7.70's with a best of 7.66 @ 89.3 in the 1/8th

- did you flow the heads after the port work? My Iron Eagle 200's are ported and flow 277/199 at .600
- what does your car weigh 3700 3800? mine is a little advantage at 3500 with me in it.
- What does your exhaust consist of? I picked up a good bit by going to a 2.5" X pipe mandrel bent system.
- I run a plain old RPM intake. That would be the first thing I would change on your car. The Vic Jr on you heavy car is hurting you.

All in all with a a few small changes and tuning 11's might be a little stretch but a very low 12 is in reach. Good luck and keep us informed on the project.

I don't know the flow rating on my heads, all I know is they where huge heads; for a small block.

I have never weighed my car. It is a 69 chevelle that is all steel, no fiberglass.

Why would the RPM be better for my set-up. The cam card said that it would make power to 7000rpm, that is why I purchased to vic jr. I thought the single plain would make power, then the dual plain, with my power range.

i would keep the vic with the 390s,its good for the motor ,i wouldnt even consider a air gap,you have a 383 that probably shifts at 6800,work with timing,jets,traction,red pump should be fine ,are you running 3/8 or + fuel line

Heads are huge, you will need as much rpm to get them to work. Honeslty I would build the motor for RPM. Deep gears, big cam, big carb, let it breath as much as possible. A heavy car makes it harder.

Remember motor is only half the package, as everyone else mentioned it's a combo.

Steve

Is it a hydraulic or a solid roller? I assume as small as it is that its hydraulic. Hydraulic motors don't like to see much over 6500.

Your car is probably 3800-3900 lbs if it has nothing removed. With your small cam and fairly tight converter I still think you will be just as well or better with the RPM defanatly don't step up to a super victor. Mine has a baby hydraulic flat tappet .500/518 232/242 at 50 and runs the times above

What is that old saying i used ta say??

Oh, "poked, stroked and blown, and if that ain't enough add a little gas!!"

He, He!!

AND if mine isn't enough, I will either poke and stroke a bigger one or blow what I have!!

pdq67