i did a search but just couldnt find the exact answer i was looking for i was wondering if i can use my stock valve springs (97 305 5 speed) with the zz4 cam or if i will run into any problems ? this is kinda an off topic question but is there a ecu controlled rev limit on my car ?

 

well probably at like 10K but there is another one at about 8500 called exploding engine

 

I assume you meant '87 valve springs.

"Run into" is a pretty good way to put it. As in, your springs will run into themselves, and most likely the retainers will run into the top of the guides.

Pulling the heads is the only way you're going to be able to modify them to take the ZZ4 lift.

 

damn that sucks i was really hoping that i could pull off the cam swap, there dirt cheap, i guess i will just wait till i do a full rebuild befor i try to switch the cams. thanks for the replys

 

You might be able to get away with a .050" offset lock set.

 

Agreed but his spring seat pressure will probably really tank. He would also have to check the valve seal for clearance. If that would clear then with aftermarket springs with more pressure he would have a decent setup.

 

theres really no such thing as a dirt cheap cam swap if you want to do it right....you might be interested in something i posted to a guy wanting to do heads and a cam....the thread is called UPGRADES LET ME KNOW
its interesting.

 

i'll just wait till i got more time and/money to do cam swap but thanks for all the info guys !!

 

 

i heard of people swaping in the lt1 cam is that more of a doable goal on stock springs

 

Well I was thinking then he'd shim up his valve spring .050" as well. All you'd be doing is raising the entire valve spring and jazz up .050". If the only problem is valve guide boss clearance, this would work. Of course you still need new valve springs with this cam either way - i'm just saying you don't have to pull the heads off and machine them. (Well, might not have to, measure it stock, if you need .040" extra, then this'll work, if you need .070" then no).

Forget the stock springs, they're barely good enough for a stock cam. Springs are cheap, like $80 maybe eh? I think of it this way, 3 tanks of gas. That's cheap for a performance upgrade. Always think in tanks of gas.

 

Im dumb when it comes to cams. I been wanting to swap a bigger cam in my 87 IROC and was thinking of a ZZ4 since alot use it here. As far as springs go, willing swapping to ZZ4 springs do? What I mean is will ZZ4 springs fit the heads or does some modifying need to be done?

 

There was an awesome article in this month's chevy high performance mag about cam selection. Basically what it came down to was that unless you factor every part of your engine into the cam you use, you could be throwing good money away. Just because the zz4 cam runs well in 350s with vortec heads and a carb does not mean that it will pull even close to the same numbers as your stock 87 engine. In fact, I would be willing to bet that it would cause a loss of low end torque and power. Here's the link to an older article along the same lines, you will feel your brain growing with every paragraph. http://www.chevyhiperformance.com/te...camshaft_info/

Hope this helps, squid.

 

Thanks, BTW Im not a squid, Im a Seabee.

 

Whatever you say squid

If they wear dog bowls, white clothes all year, and tuck their "caps" into their waist bands, they are squids, even if they do wear bumble bees. What is that they say... "United States Marine Corps, MENS Department of the Navy"

 

Ill remember that the next time a jarhead needs a Bee to do something for them.

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