ShawnMacAnanny

His car is a 95, Camaro Z28, A4 like 2500 stall with i think 3.23 gears. Its way down on power. The engine was a GM replacement longblock and while the engine was out the shop installed a cc305 cam for him. He tells me he has stock valve springs on the car. I'm sure the shop would have installed atleast LT4 springs on it but in any case he wants to change his springs.

I've been out of the LT1 performace for a while so i dont really know much about whats used anymore. Ive been reading and seen that alot reccomend the 918 springs. What rockers would you reccomend? I'm sure he has stock pushrods, stock rockers stock cylinder heads, a cold air intake, flowmaster cat-back, high flow cat-back, the transmission is built to some degree.

What springs (and whatever other parts are required) would you reccomend for his setup? Also what rockers should he get or are the stock ones fine? I know im using my stock rockers on a .651 lift cam on my ls1 but ls1s are a differnt story.

87bandit

crane dual coil kit will work perfectly and is cheap

I'd recommend pretty much any 1.6 roller rocker

ShawnMacAnanny

Where can i buy those? I dont see them on Thunder Racings website.

bombebomb

I do not know what the lift on the cc305 is, but if its under 600 I would use some PAC 1218 beehives(918's before comp switched manufacturer), because the comp 918's had a bad "batch(s)" and was breaking on people. The 1218's are rated to 600 lift. If it has more then that, or you just want insurance (which I personally like) I believe ites the PAC 1518's that are rated for .650 lift.

87bandit

http://store.summitracing.com/partde...5&autoview=sku

10308-16

ShawnMacAnanny

Haha JUST opened up that page on the google search. I've seen people mention locaters and remember something about guideplates. I dont recall having these on my LS1, will he need this as well? Whats a good brand of roller rocker for him to get?

I think the cam is like .590 or something. I would really like to use dual springs if at all possible. I know its unnecessary stress on the pushrods and rockers but i have personally had a valve spring break on my old 465rwhp Z06 and I drove it home after this 'loss of power' to check it out and lo and behold i had a broken valve spring. It has a set of ET heads on it which were about $2600 at the time so having that inenner spring not only save my cylinder heads but also my LS6 bottom end. So it's worth it in my opinion.

ShawnMacAnanny

Comp Cams "305" LT1 Camshaft, 220 / 230, .510 / .510 114 LSA

Could he run say 1.7RRs on that setup since he would have the extra spring to handle it? Would that interfere with piston to valve clearence? Would he need stronger pushrods? The lift on the cam just seems low to me.

87bandit

a good brand of roller rocker is Crane or Comp

LS1's come stock with NSA rockers and guideplates built into the heads, NSA rockers and guideplates won't be necessary on a cam that size

ShawnMacAnanny

So far all the needs it the Crane kit 10308-16 right?
He should get Crane or Comp 1.6RRs, he wont need guide plates or locators?
Does he need new pushrods? I know with the LS1s you can get away with running stock pushrods but its kind of frowned upon.
He also wants to know if those dual springs will be too heavy for his cam. I dont see them robbing much HP.

Sorry for all the questions i just want to make sure i order him the right stuff.

slingshot

That cam should run pretty well, I have it in my car with full boltons with a converter. I bought the car with the cam in it, so I really cannot tell you what springs are in it, the car should dyno in the 320 range. My car should be on the dyno next spring after all of the ice clears up here in Chicago. A higher stall converter will really help it, I have a 3400 stall converter in my car.

87bandit

I have the comp magnums and they work great

if you're running a NSA rocker (which you don't need to with that cam) you need guideplates. since you can opt for a SA rocker you don't need to buy guideplates

as for pushrods yes you can get away with stock but if you want some cheap new hardened pushrods, comp sells 7.200" hardened pushrods for like $30-35

ShawnMacAnanny

So the 10308 spring kit for $167 from summit
The self aligning magnum rockers for $190 from thunder racing
where do i get the pushrods from for $40?

RamAir95TA

http://www.thunderracing.com/catalog...vid=4&pcid=106

ShawnMacAnanny

Oh haha i dont know how i missed them. Thanks guys!

Stl94LT1

You can't use self-aligning rockers with the 10308-1 spring kit.

A quote from LE, "The Crane 10308-1 kits will NOT work with SA rockers either. You would need a different retainer/lock set up for these to work".