Thread: A SBC build

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Well, you know my deal on cams.....I still just fill out the sheet and call Comp Cams. They've done very well for me over the years. With the good converter now you should at least be able to get up in the duration high enough to make it still pull on the top end..... How much lift will your valve springs tolerate before coil bind?

you are getting 4500 stall out of a 9 inch stall? that s what is the core size i run with a big blocks .i think a 8 is were you want to be at??

i have the sheet laying around here somewhere lemme go grab it ,,,

on the huges website it said true stall for their 9 inch 4500 was like 5+????

Originally Posted by pat mccarthy

you are getting 4500 stall out of a 9 inch stall? that s what is the core size i run with a big blocks .i think a 8 is were you want to be at??

i dont know which set of specs to post, heres what i can make out out of all this technical jargan, heads seat up @ 1.75 " 133 # on the seat<closed

1.20" 385# open <full lift>

1.100" ---> coil bind, thats how its wrote down maybe you guys can figure the tech jargan out they are dbl valve springs with a dampner k-motion's

if your going up that hi i would look at some ligth weight valve train parts i would run thre super 7 valve locks and titanium parts would help and buy the best pushrods and check them at mild lift so there the rigth size .some of this stuff can be found used on Ebay nascar parts and re work it to fit

cam that was int here was .500 .500 .300 .300 some thing from speedway motors that was laying around, ran good till i put a smaller converter and dual plane intake on it ha! yes wheel spin, 1.8-2.1 60 foot times.

or, just cheat

the heads have 10 degree locks and retainers

step up 1.750 stock for a small block @130 lbs to lite and coil bind is 1.200 at 385 lbs 500 lift is pushing it ? you will need a hire setup like 1.850

I now it's not a chebbie, but the Pinto wagon with the 289 and 5 speed I had about a gadzillion years ago ran about the same rpm, crossed the line @7200. Was a long time back, but the lift was in the 520's and duration was split, both in the 280's. This was with the cast iron 271hp/289ci heads angle milled to 58cc. Maybe the guru's will know what that mini mouse would want as opposed to my antique blue oval setup!!!!

Originally Posted by pat mccarthy

step up 1.750 stock for a small block @130 lbs to lite and coil bind is 1.200 at 385 lbs 500 lift is pushing it ? you will need a hire setup like 1.850

Are the springs shimmed? You could gain a little height but give up some pressure, 385 is plenty with the valve open I would think.

try this 247 252 @050. .507 .528 lc 112 or a round there

like i said i probably mis read it all ill ask the guy tomorrow to de-dumbeyfye it. <nice spelling huh> these are the springs that are on there specs from jegs on the k-800's 1.460'' Dia. Silicon Double Valve Spring with Damper,
Seat Load: 165lbs @ 1.850''
Open Load: 495lbs @ 1.150''
Coil Bind: 1.085''
Max Lift: .700''
Set of 16
571-K-800
like i said, theres just a sheet with a bunch of writing i dont know what i t all means! yes springs are shimmed .030

well i would want to see abit more then 130 on the set and the spring can not take much more lift and would want a hard shim under the spring stock set up is 1.750 with stock parts