what springs to use ? (part 2)
Thread Starter
Staging Lane
Joined: Jan 2004
Posts: 74
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From: East Hartford, CT
what springs to use ? (part 2) Ok...
TEA heads, machined for 987 springs
Putting big cam in... 987s not up to par (232/240 593/603 112 cam)
Can i put smaller diameter springs into the spring pockets that are machined for the larger? stock is 1.250 right? these pockets are machined to accomodate 1.430/1.460 springs... but there are a ton of good stock diameter springs out now!
Do I have any choices other than going to 977s? (aka need Comp Rs which I have but I don't have adjustable rockers....)
TEA heads, machined for 987 springs
Putting big cam in... 987s not up to par (232/240 593/603 112 cam)
Can i put smaller diameter springs into the spring pockets that are machined for the larger? stock is 1.250 right? these pockets are machined to accomodate 1.430/1.460 springs... but there are a ton of good stock diameter springs out now!
Do I have any choices other than going to 977s? (aka need Comp Rs which I have but I don't have adjustable rockers....)
You have a PM...
Also, you can shim the stock rockers, or a direct replacement (YTs, HS, etc) so I'd not give up on that idea, yet. Comp 977s are great springs, several X2 and X3 cars running around on them with no probs.
Also, you can shim the stock rockers, or a direct replacement (YTs, HS, etc) so I'd not give up on that idea, yet. Comp 977s are great springs, several X2 and X3 cars running around on them with no probs.
TECH Apprentice
Joined: Jun 2002
Posts: 321
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From: Bowling Green, KY
You must run longer vavles to run the 977 spring. However with a modified spring locator you can run the 978 which is identical to the 977 except for the installed height is 1.800 instead of 1. 850. Remember to use comp "r's" with either spring.
I can shift faster than you.
iTrader: (21)
Joined: Nov 2001
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From: Baton Rouge, LA
Originally Posted by tux2112
Can i put smaller diameter springs into the spring pockets that are machined for the larger? stock is 1.250 right? these pockets are machined to accomodate 1.430/1.460 springs... but there are a ton of good stock diameter springs out now!
On The Tree
Joined: Jan 2004
Posts: 192
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Fine, but this advice had me waste several hundred $ on the crane set up when they didn't work due to the install height. I was told I could just put them in without shimming. After this, I had valve float at 6000 instead of 6400.
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Originally Posted by TEA Brent
You must run longer vavles to run the 977 spring. However with a modified spring locator you can run the 978 which is identical to the 977 except for the installed height is 1.800 instead of 1. 850. Remember to use comp "r's" with either spring.
Thanks
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Brett Foote
TECH Fanatic
Joined: May 2003
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From: RainbowCity,Alabama
Originally Posted by tux2112
Ok...
TEA heads, machined for 987 springs
Putting big cam in... 987s not up to par (232/240 593/603 112 cam)
Can i put smaller diameter springs into the spring pockets that are machined for the larger? stock is 1.250 right? these pockets are machined to accomodate 1.430/1.460 springs... but there are a ton of good stock diameter springs out now!
Do I have any choices other than going to 977s? (aka need Comp Rs which I have but I don't have adjustable rockers....)
TEA heads, machined for 987 springs
Putting big cam in... 987s not up to par (232/240 593/603 112 cam)
Can i put smaller diameter springs into the spring pockets that are machined for the larger? stock is 1.250 right? these pockets are machined to accomodate 1.430/1.460 springs... but there are a ton of good stock diameter springs out now!
Do I have any choices other than going to 977s? (aka need Comp Rs which I have but I don't have adjustable rockers....)
Yes,you can run a smaller spring in the larger pocket.Just mak sure you buy the spring lcator.The patriot "GOLD" spring kit comes with a hardened spring locator that will hold the spring in place.This will let you run a stock diameter spring in a larger pocket.
Originally Posted by Z28Venom
I didn't know that the 978's required the Comp R lifters. My heads came with the 978's and I'm running them on stock lifters. How much trouble am I in? Do I need to change lifters immediately?
Thanks
Thanks
BTW, the coil bind on the 978 is 1.090" , the coil bind on the 977 is 1.200", since there has to be a minimum of .050" from peak lift to coil bind, then the 977 would have to set up at 1.850", which is not possible with most LSx head setups.