Perry93TransAm

I just finished up my 383 build-up for my 97 T/A, the motor is still setting next to the car right now and I'm kinda having a little trouble about what cam to use. The car will be rarely driven (maybe twice a week a few miles), full weight and mayby raced for fun 8 to 10 times a year at organized events (bracket). My goal is a 12 flat or high 11. this is what I HAVE. Of course the 97 WS6 auto. 3.42 rear gears (have a set of 3.73s in a box) Vigilante 3000 stall and a set of M/T sportsman Pros. The motor is a cast steel eagle 3.75 crank, 5.7 eagle rods, KB pistons w/16 cc dish. Mildly ported AFR 190 cc heads. Port matched intake, 52mm t/b, stock injectors (30#s later), opened up stock ram air (hood and box), stock MAF,Hooker S?C long tubes , 3 inch y-pipe into 3 inch cat-back. All these are knowns as well as the car weight which is 3654 with me in it. Any and all sugestions are welcome.
Thanks

treyZ28

off the shelf? Xe 230/236 HL

i vote custom ground solid roller if you can afford it.

Perry93TransAm

I can spend up to 400 for the cam. I know it would be much more total with lifters, springs, etc.

Jeff Belloma

what is your compression ratio? and do you need to worry about emissions?

JB

Perry93TransAm

My compression ratio seems to come out to 11:1, and no emissions is no problem here in Oklahoma.

Gripenfelter

With the AFR heads and the fact that you won't be driving it much, I would get a custom ground cam from Comp for your setup. Not off the shelf.

Perry93TransAm

Any suggestions on the cam specs? Hyd or Solid, etc.

Jeff Belloma

your goal as i read it is to run low 12's high 11's, correct?

that being the case, you don't need a mechanical cam when a mild hydraulic will get the job done. you could run a really mild hydraulic roller, then you just need to get the power to the ground. the engine is the easy part. you could honestly meet your goals with a good setup and only 1 hp per cid. of course we'd like to see more than that but my point is that ET is in the combination (read suspension setup).
i personally would run a hydraulic roller with 226-230 degrees of duration and no more than 110 degrees of lsa. 383's will usually make best torque and hp with a lsa of 106-108º. lift should be matched to your cylinder head flow. 5% more lift than the stall point is a good rule of thumb. if the port makes 270 cfm at .550 and only 275 cfm at 600, for all intents and purposes it has stalled at .550. don't get too hung up on using a ton of lift. the effective area is more a function of the lobe grind than the duration and it's lift.

JB

Perry93TransAm

Thanks! I called comp cams and they say they can put a cam spec on any ls I ask but it will change the LCA a few degrees. I'm thinking of the mid XE grind and have them close the LS a little, its ground on a 112.