I'm building a 383 for the sole purpose of drag racing period. I don't care about anything other than making the most power the most efficently for the money I have to spend. Now with that said I'll give the lowdown on the combo so far. I have a forged rotating assembly which consist of 6in H beam rods, eagle 4340 crank, and JE flattop pistons that are suppose to yield a 12 to 1 CR. The heads are factory LT1's that have been ported a polished and flow 270@ .600 int and 227@ .600 approx. I don't have the flow sheet in front of me, and a ported LT1 intake. I will be using the GM PCM for the time being and want a cam that will peak around 6600-6700 rpm. I had first thought about going soild roller, but since I won't be able to spin past 7000 right yet I was considering going hyd roller. Give me your opinion on what might work for me, oh and by the way this is what I am considering.
Soild Roller 248/254/.606/.612 110ls 106 int CL.

Randy

 

talk to bret about a custom grind
to make the most power for a drag-only car, your best bet would be a solid roller though

 

talk to Lloyd elliot, i just had a Le4 cam ground for my 383. not sure how it is yet. i just got the motor back yesterday.

 

I discussed this with my engine builder at great length and I think we've decided to go with a 236/242 .602/.608 with 1.6's 112 LS.

Randy

 

Why 112 lobe sep?

If it's strictly for drag and driveablity is no issue, why not get some more power and goto a 110 or even a 108 LS?

 

Is that a solid or hyd. roller cam?

 

It's a soild, and a 110 LS was what I had intented to run. I have alot of confidence in my engine builder and he has alot of experience with soild roller 383 LT1's, and besides if it's not right I'll just have to change it.

Randy

 

So is this cam going to peak at 6600-6700 in your 383? Just curious for future reference.

 

It should peak around 6500 or so and I'll probably shift it at 6700. Once I get it built and dynoed I'll post the powerband.

Randy

 

Thats what the GM 847 does in my stroker, shift point wise anyway.

 

That's exactly what I was going to ask.

I would think you'd want a bigger cam for an all-out race car.

 

I may go bigger once I can afford a DFI, shaft rocker, and a killer set of aftermarket heads, but for right now I'm going to go with this recomendation because in six years he's never steered me wrong and I've won alot of races and championships.

Randy

 

i was thinking the same thing as SweetRedta, I'd go to more cam with a SR as well since that SR is about the same size as your Joe O hyd cam.

Bret

 

Well it's a footbrake car and I only run the 1/8, so we're trying to make TQ and we feel we can do it better with a smaller cam. As for the 112 LS I was always told you really didn't need to go much narrower than that especially with factory EFI.

Randy

 

You Heard wrong