Jester

K motion K-700
1.265" diameter
115# @1.7"
350# @1.15"
bind is at 1.050


They're $43 bucks. The Cranes I WAS gonna buy, with as far as I can tell identical specs, are $110. WTF am I missing?
In case ya'll forgot it's a 234/244, .510/.544 cam.

ede

yeah i'd say they'd work ok for you. best to check with the cam grinder.

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-=ICON MOTORSPORTS=-
1st & 3rd

Jester

I dunno...he stopped calling back after the 2nd date.

AlkyIROC

Too small for the cam choice. The K-700 springs are a stock replacement spring designed for lift up to .500". If the spring pockets are not enlarged for larger double springs then you need K-750 springs. If the spring pockets allow for the larger 1.460" springs then go with the K-800. Both the K-750 and K-800 allow up to .600" lift

What crane springs were you considering?
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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley


[This message has been edited by Stephen 87 IROC (edited November 19, 2000).]

Jester

Ok..the K-750's bind at only .020 more, and have only 30# better seat pressure, and cost $130. WTF am I missing?

AlkyIROC

Since I don't have a K-motion catalog I can only assume it's the thickness of the spring material and the spring rate.

When the valve is fully open there should be a minimum of .060" between the coils. You could probably use the cheaper springs but would have less than the recommended .060" between the coils. As long as you're not spinning the engine to 6000 rpm they should last for a while. Don't forget the rockers also. Lifts higher than .500" require a rocker with more travel. Stamped steel rockers are available with a longer slot or just install roller rockers.

It's always best to use the cam's recommended springs. The cam makers know what springs are required for each cam. You can actually make more power by using a stronger spring but also risk wearing out a cam earlier.


[This message has been edited by Stephen 87 IROC (edited November 19, 2000).]