Thread: What do you guys think of this combo for torque...

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Comp has dyno sheets for the XE250H and the XE256H cams on their website.

http://www.compcams.com/Technical/Dy...50H-10_001.asp
http://www.compcams.com/Technical/Dy...56H-10_001.asp

They make pretty much identical power curves with the same peak torque and horsepower at the same engine speeds. The 256 just carries itself for a few extra rpm. That means you can stay in your lower gears longer to help get that heavy car rolling.

Horsepower is what gets you down the track, not torque. I can exhert just as much torque as my engine to the wheels of my truck and more. Yet, I cannot exhert that torque fast enough (horsepower) to get it rolling at any appreciable speed. If you have a car running at a certain mph and two engines running at the same horsepower output, yet one is running at 3000 rpm and the other is running at 6000 rpm, they are both putting the same amount of torque to the wheels even though the 6000 rpm engine is making significantly less at the crankshaft. Maximize your horsepower and generate your torque with gearing (those 3.73's are going to be plenty sufficient).

Here is a clip of my truck running a 15.372: http://videos.streetfire.net/search/...E19507E2C1.htm
By using the detent to keep the truck in 2nd gear, I was able to increase the MPH from 88 to 90.5 in a later run, but I spun the tires bad off the line.

The combination I gave is entirely capable of getting a 3600 lb Vette into the 14's, especially with your gearing and tires. No slippery converter or high octane gas required. It was topped off with an out of tune Q-jet and a stock HEI ignition.

this is awsome. i have a story for you. a friend of mines dad built a 79 corvette 350 30 over (355) vortec heads, flat top pistons (10.0:1 compression) 750 q-jet, all stock ignition, 3.73 rear gear. this story isnt one of those i new this guy that new this guy. i actually rode in this car. at a stand still this car jumped out of the hole. then we proceeded to go down town by highway in a 55 mph zone we were doing 60 came up on this car and slowed to follow i was just along for the ride but i had a feeling he was gonna pass this car. yup he did i looked at the speedo just b4 he punched it at 55mph we were what seemed instantly at 80 mph and it set me back in my seat like the seat was pulling me in. just a story. but if u start doing head work just like i tell every 1 check the price of the work then check the price of the vortec heads. oh yeah he used that extreme 4x4 cam dont know the numbers but that car had an awsome thumpy idle and went like HHHHEEEELL666

Hey 383..If you can, find out which cam he used.I think I am on the right track with this set up. Only thing is I am still running about 8.2 compression ratio. I wonder if I HAVE to boost my CR in order to have the big power. I didn't go with the vortec heads and intake, but I wonder before I put it back together if I HAVE to go that route. Nothing for nothing, but the car isn't really worth more than 12 gran, and it is worth LESS the more I chop it up. I plan on selling the car next year, and getting a real car, but this is fun for now.
I thinl the 3.73 rear is the major ticket to be honest.