Why does Comp Cams say I can't use a 1.25 spring with the 284 Extreme Cam?
04-18-2002, 04:45 PM
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Car: Junk
Engine: Junk with nitrous
Transmission: Junk with gears
Why does Comp Cams say I can't use a 1.25 spring with the 284 Extreme Cam?
Even though several company's make 1.25 valve springs that are good to the lift the 284 cam has (.507/.510). For example, the Crane 99846-16 spring is good to .540 lift and crane recommends this spring with several of there cams that have up to .525 lift. I don't want to machine the spring seat for larger springs because I'm sick and tired of waiting for my heads back from the machine shop, and I need my car project to be done NOW! 
School is going to start real soon (summer session) and I won't have time to dick around with stuff like this. Here's the specs on the cam:
.507/.510 lift
240/246 duration @.050
284/296 advertised
110 LSA
What 1.25 spring should I use with this cam? Would the 99846 work Okay? Is anybody here running this cam?
School is going to start real soon (summer session) and I won't have time to dick around with stuff like this. Here's the specs on the cam:.507/.510 lift
240/246 duration @.050
284/296 advertised
110 LSA
What 1.25 spring should I use with this cam? Would the 99846 work Okay? Is anybody here running this cam?
04-18-2002, 06:11 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If Comp told me to do something a certain way, I wouldn't do it any other way.
04-18-2002, 06:49 PM
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Car: 89rs
Engine: 400Sb
Transmission: Tremec 3550
there are very few 1.25 springs designed to go .5+ lift
they really don't last long when you talk that much lift and rpm.
http://www.competitionproducts.com/index.html
has a spring that will go .6
But, i would really consider 1.44"
http://www.competitionproducts.com/index.html
has a spring that will go .6
But, i would really consider 1.44"
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