increase torque
 

my engine has no balls when it comes to lower rpms. whats a good way to increase engine torque without spending much money.

Re: increase torque
 

what type of manifold are you running? single plane will kill low end performance. also what head/cam combo?

Re: increase torque
 

Manifolds > Headers at low end torque.

A stock intake will often times yeild better low end torque then aftermarket ones aimed at more upper end HP.

Re: increase torque
 

For your headers, best bet is shorty headers with small tubes [1 1/2"] and exhaust pipes no bigger than 2 1/4"....2" is better for low end torque.

A daul plane manifold that gets best performance at 1500 rpm and up will do fine. Edelbrock's Performer EPS does this. If you really want to move when towing or hauling, get a mild cam that comes in around 1000 rpm. I have this setup on a mostly stock 350....moves nicely off idle for a 4300lb truck with 400 lbs in it daily [me and a few tools].

Re: increase torque
 

What motor is in your truck?

Re: increase torque
 

In his sig:

Re: increase torque
 

What rear axle do you have?

Re: increase torque
 

For what you got I would have to say your cam is the problem. It must be a top end cam. I'd put the lowest or next highest (from the lowest) RPM range perf. cam they make.

Re: increase torque
 

I would say the cam is the problem also.

Re: increase torque
 

I agree with the cam.The biggest performance mistake most people make is to overcam overcarb an engine.Rather than matching components for the overall type of performance they go for the "Bigger is better" plan that doesn't work for anyone but goverment.

Re: increase torque
 

I would look at two items :

rear end gears and what cam do you have...

I agree that sometimes you can over cam a motor killing it's low end torque and power.

Re: increase torque
 

What camshaft, what intake, and what carb are you running? what are your rear gears? I agree with the posts above that state you may be overcammed. Bigger is not better for a street driven heavy vehicle with a small v8. Big cams sacrifice low end torque for mid-upper RPM power.

Another thought: Maybe the HEI is not timed as well as it could be? Consider your initial advance as well as mechanical advance. Perhaps swapping to lighter springs in the HEI would help to bring total timing in earlier. Also check out your vacuum advance... is it even working? look for vacuum leaks on the engine... that will definitely hurt performance! Maybe the carb is not jetted as well as it could be? Maybe the secondaries are not opening soon enough?

Re: increase torque
 

i couldnt really tell you what exactly what the engine has cause the po did all the mods to it before i bought it. it has 4.11 gears, the timing is set to 10 tdc at idle, cant remember what the total advance is, im planning on switching to manifold vacume soon but i dont know what it does to engine performance. over the weekend il probably pull the valve covers to get the head numbers. i was thinking of gettin a gm aluminum intake cause a good friend of mine said they are one of the best manifolds out there, hes runnin them on his 67 c10, his 80 vette, and i think his dad has them on his 72 cheyenne. heres some pics to see what i know i have.

Re: increase torque
 

Cadillac 500. GM 502. GM 454.

Just kidding. All the above info is right on the money.

Re: increase torque
 

gm sells a cam they call a 300hp 350 cam and they work well without killing all your torque.

Re: increase torque
 

My 350 in my GMC has a Crane "truck-power" cam, headers with 2'' duals, edelbrock intake and a holley 600 4bbl, and for a big old truck, she friggin flys!!! I'm thinking about a different set of heads though, I think mine now are holding my engine back alot, powerwise.

PS...cam specs are .427/.454 lift...look up Crane truck power cams in either a jegs or summit catalog, it'll be right there.