beast2001

Hi everybody,

I have 2002 Camaro SS with stock internal and stock 243 head and I am planning to swap my stock cam with Comp Cam LSR 54-459-11
231/239 .617/.624 113LSA
Can somebody please verify if this cam will fit under stock heads & gaskets?
And will I have an issue with piston-2-valve clearence?
And what size of Push Rod shall I have?
and finally any dyno result for such cam

beast2001

Any help Please before I take that cam

Isolde

iTrader: (4)

I expected someone would suggest you call Texas Speed or Thunder Racing for them to hook you up with a similar cam from their lines.
If this is the stick you're decided on, your only help is looking to be Comp's own tech line.
You'll need to do your own checking of clearances.

low2001gmc

iTrader: (148)

a buddy has the 227-235 with like 621 lift in a 6.0 with 243s and unfortunately he didnt have the piston to valve clearance checked. it sounded bad *** but when he revved it up going the track, ooooppssss, the piston and valves kissed and there was damage to say the least. nice cam to have but they require piston notching, preferably no milling of heads and good aftermarket heads to get maximum performance. if you got the money to spend on piston notching and good aftermarket heads and might as well add a fast 90 at least, go for it. but if you dont, better to go with something under .600 lift and 228 duration. it is all about the combination, your intended use and available funds. look at dyno section for eps baby cam dyno numbers, it is simple, a blast to drive and cost effective if you ask me. others with bigger cams have a hard time matching them numbers but it is all in the combination.....good luck....

moeZ28

iTrader: (7)

Lift isnt as much of an issue as duration and lobe separation angle are...if your heads are stock for a 2002 then they arent 243's, they are 241's. That cam should have no problem fitting your motor, but its always good to verify pistion to valve clearance with a checker, which is cheap compared to a rebuild. There are much larger cams for stock engines running around just fine.

low2001gmc...are you sure your friend didnt miss a gear and overrev the motor and kiss a pistion that way...which would have nothing to do with ptv clearance and all to do with driver error...

Oh, and by the way, Comp grinds all the cams for Thunder Racing and for TSP. The cams are spec'd out by those companies, however most, not all, are ground using comps lobes...so yeah, comp would be a great source to check with on this situation.

Isolde

iTrader: (4)

The trouble with this approach is that noone has a baseline tune to get you close. If you're running a stock cam now, this new stick you chose will be a radical change of idle, and may need to be towed to the chassis dyno shop for tuning.

garygnu

if you want that cam call of email comp cam.call or email TSP about 1 of their cams kits.maybe consider a torquer v2.look at the EPS cams ,the lobe is just a little mellower then a lsr cam.

beast2001

Thanks alot everybody
And I already sent an Email to Comp and I am waiting their reply

low2001gmc

iTrader: (148)

low2001gmc...are you sure your friend didnt miss a gear and overrev the motor and kiss a pistion that way...which would have nothing to do with ptv clearance and all to do with driver error...

nah it is a truck and automatic so missing gears.....even in the hot rod sept 2009 issue in which they tested it, they said they got away with it on the dyno but didnt recommend it for the street....for that reason.....

moeZ28

iTrader: (7)

Even with autos you can bang the limiter a few times between shifts...doesnt have to be a missed gear. I have seen several cars on here running bigger cams than that with milled heads and had no problems. One user is running 11.5:1 compression with a 235/243 LSL lobes on a 110+2 LSA and has plenty of PTV...but you should always measure.

PREDATOR-Z

Properly installed it will fit.
You'll need a good set of dual springs for that cam, it should be good for at least 50rwhp increase if done right.

trans_am7935

iTrader: (15)

now i have to say, the beginning of this post got me nervous cause i just ordered a 227/235 .614/.621 LSR cam and PRC 5.3 stage 2.5 heads. but it seams that people have fit bigger LSR cams with no notching of pistons on stock bottom end LS1's. my thing is, is it i am trying to decide if it is worth it for me to even try to get the .040 head gaskets for a 11:1 compression ratio. but i guess i will never know till i check!

Always2Slow

iTrader: (8)

If a trex will fit on a stock bottom end tons of cams will fit. When you get into the larger cams its very important to degree the cam in and check clearances. Instead of just buying the cometics and them not working torque down the head with the old gasket measure and then see if you can squeeze it in.

trans_am7935

iTrader: (15)

that is what i was gonna do. now my quesion is, i need to use 2 solid (or 2 modified hydrolic to act solid) and put the new head and cam in, then use all the old head gasket and torque it down to around 30 ft lb with ALL 15 BOLTS? or do i just use the bolts around the cylinders?

Shockwave179

iTrader: (7)

I was looking at that cam. I'll be interested to see your results.