Need help with comp 280 install ASAP!!!

[tlcooper]

Hey guys its me again, alright I've found out from the machine shop that on my cpi engine with L35 heads, the stock spring yields a max lift of .450. As you all know, I am DEFINETLY purchasing the computer controlled comp 280. I know that to accompany the extra lift you need to machine the spring pocket for lift over .450 for L35s and .480 for 96+ vortecs. I'm trying my best to get around having to machine my heads, they are already done!!! My question for you guys is there a "DROP IN" spring with the same diameter as stock but allows more lift and uses the same retainers, locks, and valve seals???

As soon as I get everything installed I will post pics and video...

thanks in advance

[Mikz86TA]

Im not 100%, but look into the LSx beehive springs.

[ZR1-S10]

I belive the Comp 918's fit right in but you still have to machine the guides and seals down for the extra lift.

[firefighter]

ALLWAYS, ALLWAYS, ALLWAYS. Have your spring height checked. The beehive will work though but get it checked.

['94 Big Blaze]

check out # 9 and 10...they had the same problem...used a 280 cam

http://www.hotrod.com/techarticles/engine/113_0208_chevy_43l_262ci_v6_engine_build/dyno_results.html

[tlcooper]

do you guys think it would be pointless to get a comp 280 grind down with lift under .450 and everything else the same(ie. 224 duration and 110 lsa)? I ask because the stock cpi cam's lift is .432 intake/ .440 exhaust. So basically it would be a cpi cam with more duration and a 110 lsa instead of a 112 (stock cpi). Would it be worthwhile power wise???

[Mikz86TA]

I dont see why not. Ask Comp about it. They do custom grinds from what I hear and may have already done what youre asking. Im sure the top end pull will just be a few hundred RPM shorter.

[shipper]

I think the major issue is valve seat-retainer clearance; which if unchecked could be more than disasterous. Also coil bind. Touch the coils ONCE and even the very best valve springs are wasted. One could get by without machining seats if longer stemed valves and pushrods were used. All in all, you'd be ahead to break down the heads and do the machine work.