I Think that i'm going to go with the following cam: 235/243 0.548/0.556 Lobe sep. is 114 All specs at 0.050. Here's the setup:

355, Sportsman II heads (2.02, 1.6 64cc 200cc), SuperRam base, plenum and runners, 58mm throttle body, 30lbs or 24lbs injectors, 10:1, Holley AFPR, 1.6 rockers, 1 5/8s headers, custom y-pipe, hooker cat-back, MSD 6A, 700R4 2,200 rpm stall, and 3.73's.

I'm hoping to hit low 13's with that setup, I'll let you all know in spring how it turns out.

 

Thats a huge cam to run with a SR on a 355 IMHO. I'd bet the SR will run out of breath long before the cam does.
Bet hey, go for it and let us know how it turns out.
You might want quite a bit more stall with that cam also.

 

Go to ligenfelters site and get the 216 cam.I wouldnt get that cam you are looking at.Ask the professionals,as they know more than you.Cam will make or break that engine.Way to much duration for a street car,especially a 355.Got to keep it under 220 on the street.

 

I agree, the cam is way too big. The LPE 219 is designed to go with the SR. If u don't like that cam, I don't think I'd go past a 224/224.

 

awhat do ya think guys ... get rid of that 58 mm TB too

unless you are running a supercharger

 

A 58mm will be fine. I have one on my car, I got it used/cheap so I figured why spend more to get a 52mm. If he already has the 58mm, it won't hold him back.

 

IMO way too much duration unless your spinning to 8000 RPM.

 

Man, if you only want to run low 13's, take the advice from the guys above. Thats a huge cam for 13's. Thats more like a cam to run 11's.

 

cam is a lil to big
have you eer looked at the LT$ hot cam

lift .525/.525
duration-218/228
lobe sep. 112
i think that would be a little better..

also 13/4 headerswould also help it, i think 1-5/8 is not enough on such a motor

 

You are right, I did pick up the 58mm for $100. Thanks for all the great responses guys. I see what you mean, that cam is awfully large. I do like the LPE219, but that's just way too expensive for my taste. Are there any cams that are equal to the 219, but don't cost quite as much? Thanks!

 

YEP, a used 219.

 

Honestly, a cam is VERY important. If there are 2 parts you don't want to skimp on for making power, it's heads and cam. I think the extra $100 or so for the LPE 219 is worth it.

I'm looking at cams for my LS1, the good ones run about $430 for that But, they are making around 400rwhp with stock heads too

 

Go single pattern. I run the LT4 hotcam and wish I would've went either the 219/219 or what I am planning on now, 224/224, from the start.

 

87-FakeIroc: What are the specs on the 224/224? And where can i find it.

Also, I'm kinda having a hard time with a cam since i have such large heads but they don't have great flow numbers. Unfortunately, I may have to run a flat tappet, but for now i'm still planning on running roller. If i have to run flat tappet, I'll make another post.

BuckEyeRoc: I just want to take this moment to say that I am constantly impressed with your car, and to turn my car into something similar to yours is my goal. Thanks for being an inspiration.

 

Thanks, but I gotta give credit where it's due. I researched a ton of engine combos and got the setup from BeachBum on Corvetteforum. And Gofasterfirebird and TPI Guy built the motor. I did what I could and learned a lot from them. Now I just need a 12 bolt and a driveshaft, do some tuning, and put the N2O on for a 10.9. Then it's time to start playing with the Trans Am.

 

Danzig,
It is the 08-430-8, 4th from the bottom. Here:
http://www.compcams.com/catalog/062_063.html
You can get it most anywhere that sell Comp Cams I'd imagine. Thunder Racing, Summit, etc....
What are the flow numbers on those heads by the way? If they don't have a very good i/e % you might actually want a split duration.

 

what do you mean by intake and exhaust percentage? Here are the flow numbers that i have. Came from World.

intake exhaust

lift cfm cfm

0.050 40 28
0.100 68 57
0.200 132 102
0.300 187 131
0.400 225 150
0.500 240 164
0.600 243 162


Sorry my "table" looks so ugly but i hope you get the idea.

 

You should go with the cam that I'm running! My car run's LOW 12's according to the gtech and that is with the PROM way off (I'm still working out the tuning bugs in my chip) and my little 3.23 gears mated to a six speed, and damn near no traction! A super-ram will breath a little better than my ported LTR setup, so it should be a little stronger in your motor (Comp Cams XR276HR-12). My cam goes for $239.95 from Summit.

Here are the specs with 1.5 rockers:

.503 / .510
224 / 230 @ .050
112* LSA
108* ICA

It's an awesome cam!

Mike (1bad91Z)

 

1bad91z: Is that a roller cam or a flat tappet?

 

HR=Hydraulic roller in CompCam speak.
XR=Extreme roller I think
276=Advertised duration
-12=112LSA

 

this is how I understand it to be:
It is how the exhaust port flows in relation to the intake port. the closer they are to flowing the same, the less you need a split duration cam- which uses more duration to allow the lesser flowing port to move the exhaust better/longer.
So basically, the weaker the exhaust port is, the more the extra exhaust duration can help.
Am I right on this guys?

 

Yea. Thats the idea. Doesnt mean it wont work though

 

yes, it is a hydraulic roller.

Madmax is correct.

XR - extreme energy roller grind
276 - advertised intake duration
HR - Hydraulic roller
12 - last two digits of the lobe separation angle

advertised duration of this cam is 276 on the intake and 281 on the exhaust.