Thread: Need some help

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i have 400 small block bored 40 over, with .100 domes, eagle steel crank, X rods, World Products Sportsman 2, torker 2 intake, and a 850 double pumper, and .615 soild roller cam. And its not real torquey off idle but on up in the rpm range it starts to pull real hard.. I need some help getting low rpm torque out of it.


Plus its in a full body s10 with 4.10 gears and 26 by 10 M/T drag slciks..and a 350 turbo with 2.5 inch exhaust

If you want more low RPM torque, you need a smaller cam, dual plane manifold and maybe a smaller carb.

A cam with that kind of lift wont perform in low rpm, You are running a high stall converter?

im running a 3500..but its surges at a red light so im going to put a 4000 or a 4500 in it

All your stuff is for high rpm power, not bottom end. A smaller carb might help, but top end will suffer. Try limiting centrifugal advance and running more initial.

This sounds to me like a typical mistake of a lot of builders. They overbuild an engine for street use then wonder why it sucks to drive on the street.

i didnt build it for the street.. there was a guy with a truck like mine but stripped out. he said he could out cruise me i ended up the next town over waiting on him between here and there charging his battries.

could you explain this... limiting centrifugal advance and running more initial

I was thinking a higher stall converter.
I ran a Dyno program and put in your specs. Granted this is not 100% acurate but you will see the power difference at different RPM's.

3500 308 HP 463 TQ
5000 495 hp 520 tq
6500 562 hp 454 tq

Now I haven't messed with any high rpm stall converters like this but, by the looks of these numbers I would say about a 4500 rpm Stall. Right now you are locking up close to you lowest hp range. Pluse those big cams were ment to produce power in the upper rpm's.

man i thank you a bunch it gives me a idea..what site or program did you run that on..would i do better with a victor jr

If you limit the centrifugal advance with a kit, and run more initial advance, it allows the engine to come on sooner without having too much advance when at high rpm.

Originally posted by hotrods10
man i thank you a bunch it gives me a idea..what site or program did you run that on..would i do better with a victor jr

I am using DeskTop Dyno.

your talking about a curve kit ?