tristan69

My cam on me 383 is a Chet Herbert with RPM Range: 2500-6800Advertised Duration: 284/290Duration @ .050: 228/234Lift: .480/.494Lobe Center: 106c

The Guy at B&M said I should run a 3000 or 3600 Holeshot.
The guy at Doug Herbert engines said a 2500 stall would work.
My local speed shop said a 2000 - 2400 would be more streetable.

My car is a 69 vert with a turbo 400 and 308 gears.
I just do not want to have to hammer the brakes at stop lights to keep from surging forward, but not have to always give it to go.

Thanks

weimer20

I'm running a 383 as well and I use a 2200 stall. It works well and I don't have the car pulling really bad at a stop.

tristan69

B&M says it all depends on the duration at 50 of the cam.

What are your cam specs?

Thanks

gingerbreadman1977

definatly go no less than the 2500 with this engine. i would even suggest the 3000. you would not be dissapointed.i have a 3000 B&M holeshot in mine.

Glensgages

..... if you contact one of the larger, custom/drag-racing manufacturers (ATI, Transmission Specialties, etc. ), they'll ask for all the specs of your engine, and your intended use for the car:
from there, they can supply you with a converter that'll match your car and it's intended use.

tristan69

How does it drive in stop and go rush hour traffic?

How hard do you have to hold the brake to keep it stopped when running?

When you let off the brake does it coast forward (usefull in traffic)?

Thanks

The Money Pit

Your cam isn't really that big,and with a 383 it'll have plenty of low end anyway. If I were to pick a stall for you,it would be a 2400 or so unit. My 3000 is in my opinion a little too soft for the street,but with a 254@.050 cam,I needed it to help with the idle.

That said,my 3000 stall with 3.70 gears isn't all that bad on the street,but since I don't race the car,and it's really just a street toy,if I were to do it over I'd go with less stall,even with my cam.My last cam was 240@.050 and I ran a 2200 stall with no problem.

tristan69

The Money Pit[/QUOTE]My last cam was 240@.050 and I ran a 2200 stall with no problem.[/QUOTE]

With this setup what was it like at a stop light?

Thanks

76 sting

If your hardly ever at the track go for the 2500... better for the street. However, if you spend a decent amount of time at the track and looking to constantly improve your time I would go with the 3000 and bump up your gear to a 3.50

gingerbreadman1977

just the usual brake pressure of resting my foot to keep it stopped. it does creep forward when i let it off but in short littly incriments only.its only a weekend driver so i dont really have to drive it in rushed traffic but i could no problem. a little slippery in the wet but i know what to expect.i have a hydraulic roller cam so have plenty of vacum for the brakes and they work fine. i have the booster running of the carb and the rest of the accessories off the manifold.

tristan69

I would not go to the track much at all, maybe once or twice just to see how she runs.

But I fear that it will surge ahead at stop signs, at least this is what the B&M guy said.

Thanks

76 sting

I am assuming your 383 is making decent TQ at the bottom end 350 -375 around 3000RPM? I have a 10" Street Fighter approx 3200 stall and good for the track, but it is loose and I want it that way due to the NOS I have.

Sounds like you want a nice street pounder with good driving manors if so I still say the 2500.

Personally, I do not think you will like the 3000RPM stall…too loose

VettePower

Can someone explain what a stall converter is and how it works???

The Money Pit

My last cam was 240@.050 and I ran a 2200 stall with no problem.[/QUOTE]

With this setup what was it like at a stop light?

Thanks[/QUOTE]

No issues at stop lights except in rare occasions the power brakes weren't that powerful.(low vacuum due to the cam)I had my idle set real low (650 in gear) because I liked the fender shake,rumpity rump idle.
In answer to the converter question it was a 2200 rpm stall,and worked fine. No issues with two feet on the brakes to keep the car stopped at the light,or stalling because the converter was too tight for the cam.This was with the 406,mind you,which has quite a bit of low end torque.

Matt Gruber

stock stall should be fine. my 72 as per GM specs is 2110 and that is what i get. just idle it 550-650. richen IFR if necessary, in carb.

76 sting

http://auto.howstuffworks.com/torque-converter.htm