New Camshaft, need more torque
 

I'm wanting to put a different cam in my truck. I'm needing more low end torque for pulling trailers. Was wanting to hear some of the aftermarket cams that everyone out there has in their trucks. I would like to install something a touch lumper than stock, not huge just enough to notice. Also, the engine I'm running is basically a stock 1971 350 truck motor with an edelbrock 600cfm carb and an edelbrock performer intake.
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Re: New Camshaft, need more torque
 

rear ratio? tranny? tires? all play a big part in movin a 2ton brick like object

Re: New Camshaft, need more torque
 

mellings makes a torque cam, i'm not sure of the specs, but the part number is MTC-1
I'ts not a thumper, but i think this will work fine for ya , heres a link
http://www.melling.com/Aftermarket/H...ance-Camshafts

Re: New Camshaft, need more torque
 

Keep in mind that "thumpy" cams either move or change the torque curve. In most cases, they actually make less torque to produce more horsepower and/or move the torque range to a higher rpm point.

I'll show you a perfect example.
The stock GM 350 crate engine 10067353 is rated at 260hp and 350lb.ft torque. Peak torque comes in at about 3250rpm

The GM engine 12499529 engine is rated a 290hp and 326lb.ft torque. Peak torque is at 3750.

These two engines are exactly the same other than the camshaft. The larger cam in the 290hp engine moved peak torque higher in the rpm range and also made less.

This is something to consider when choosing a cam for a vehicle you plan to tow with. I would go with a high-torque style cam. Most engine builders refer to them as RV cams, but cam manfacturers no longer really use this term.

Re: New Camshaft, need more torque
 

Retrofit Tuned-Port fuel injection. You don't have to have a lumpy cam to make power.

Re: New Camshaft, need more torque
 

Call the big cam manufactures direct and talk to one of their techs. They can recommend a cam for your engine components that will do exactly what you want. They do it for living...

Re: New Camshaft, need more torque
 

Big ditto on this^^^
As well, if you are running big/tall oversize tires you've got a lot of work to do and money to spend to make torque....or even average power.
The perceived appearance advantage comes at the expense of reduced transmitted torque to the ground.
Is yours a 3/4 ton or a 1/2 ton?
Coley:chevy:

Re: New Camshaft, need more torque
 

When you call the cam co. You will need to know,engine,CR,gearing,tranny,tire size,weight of the vehicle,and probably other specifics to get the best choice they can offer.

Re: New Camshaft, need more torque
 

Here s what I just put in

http://www.summitracing.com/parts/sum-1102

I am very happy with it, I pull a 4000 pound boat.

I have a 350 w/ a 700r4 trans, and 3.08 rear gears for reference.

Re: New Camshaft, need more torque
 

Remember, torque is measured, horsepower is the answer to a math equation.

HP= RPM x Torque / 5252

So an engine making peak 400 ft/lbs of torque at 2000 rpm is making 152 HP at 2000 rpm.

An engine making peak 400 ft/lbs of torque at 6000 rpm is making 456 hp at 6000 rpm.

Both engines make the same peak torque, but the first one will be much better suited to pulling a trailer than the second even though it makes much less peak HP.

Just some fun info to mull over.

Re: New Camshaft, need more torque
 

Sorry guys. Right now I'm running 4.10 or 4.56 gears in the rear with a 4 speed manual. The truck is 72 GMC K-2500 (3/4 ton 4x4). I'm going to be going to a 3.73 final drive ratio here pretty soon with 265/75R16 BF Goodrich rugged trail t/a tires
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