I just got my new motor running. I think I need a bigger converter. I'm using a crane solid non roller cam and it has 500 520 lift and 248 258 dur at .50. It says the rpm power band is between 3800 and 7200. I thought perhaps my 3500 stall would be good but I think I should maybe move up to a 4000 plus stall. It's a complete dog out of the hole.

The rest of the motor is as follows 210 afr heads 12 to 1 comp all forged bottom end with a vic junior intake and 650 dbl with a proform main body.

I plan to use a 250 shot of juice in the future.

Please give me your feedback thank you.

need more info.show us your timeslip number.what rearend gear ratio u have?what kind of trans???

Octane of the fuel you use, weight of the car (with driver), gear ratio, tranny type, tire size, header and exhaust size, etc? Lots more info required.

First off all I'd say the carb is way to small for those heads and compression ratio. A minimum 750 DP should be used.

With 12:1 you should be using at least VP C12 fuel. 93 would be struggling to keep from detonating.

The converter is fine depending on the rest of the combination of parts you've decided to use.

The Proform main body should make it a 750.

Car wieghs 3200 pounds.I don't think the carb is way to small. It does have the proform main body which will make it flow more. And since I have been running it it has been really fat and that is with a power vavle block off 76 jets in the front and 78 in the back. I haven't raced it but I will be running 112 race gas. My best friend has the same motor with the exception of the cam and runs a 4500 stall. He has even made numerous passes at the track with 94 octance staight from the pump and has had no detenation problems.

The gears are a 4.10's the exhuast is a 1 5/8 shorties with a mandrel bent 3 inch y and full mandrel bent 4 inch. The sig should state most of that.

What do you have your ignition timing set at, initial and total?

Timing is set at 38 total. I have a 6al!

Even with a 3500 stall it shouldnt be a dog off the line. Did you degree your cam when you installed it?

Yes I did! It was dead on and I installed it straight up. It's not a dog but it isn't what it should be.

Think about it my old cam use to make power at 2500 rpm and I had a 3500 stall. This new cam starts making power at 3800. I'm not even in the power band at all out of the hole. If I let it get to 4000 rpm in first and then step on it it goes great.

You need a dyno! Then, when you find your torque peak rpm you'll know what stall cov. to use. "guessing costs money"

So does using a dyno!

If I recall right, the the stall speed was supposed to be just above or below the peak torque #'s. I'm not sure. I did a lot of guessing when I drag raced years ago, that's why I know it costs alot. I have no idea how much dyno time costs but I do know it's usefull when figuring out a combination. Some people just do it to find out what they've got.