Thread: A SBC build

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Many moons ago, Schneider Cams had some really strong skinny block flat tappet cams, don't know if they still do or not. They had real good selection and price was reasonable, too. Used to be they could get you as close to a custom grind as you could get without paying the big $$$$ for a custom grind....

Pat, should you alter the valve spring pressures when using the new "trick of the month" cams with the higher ramp speeds???

just someone help me find a cam! the bumpstick is more important then many people think to many people saying keep it under .480 and to many saying got .650 i need to know about the mysterious bumpsticks!

the springs will drop off 10 lbs on the EX and i would like more on a hiwinder but before you get all ready to put that killer cam in thing have to not flex and if the pushrod are not the right size well??

print out the tech sheet and make some calls to the cam companies! These guys are the experts and all it costs is a phone call. The numbers Pat put up should be close.... I've always had real good results with them, accuracy on the sheet is the most important thing!!!!!

Just a personal thing, and nothing scientific to back it up, but I've never gone over 525 lift unless it was on a mechanical roller....

Originally Posted by Dave Severson

Pat, should you alter the valve spring pressures when using the new "trick of the month" cams with the higher ramp speeds???

well how many sets of springs will he have to buy for that fast ramp speed he will not hold that heavy valve train down

Originally Posted by pat mccarthy

well how many sets of springs will he have to buy for that fast ramp speed he will not hold that heavy valve train down

Ok, I see... Didn't realize they would grenade the springs.... Thanks for straightening me out!

Originally Posted by Dave Severson

Ok, I see... Didn't realize they would grenade the springs.... Thanks for straightening me out!

well i just can not say but if he well go that way the springs will take it all parts need to be light or in time the springs will get killed i would but isky spring s and the lite lifters they have

the cam my friend dave is telling me to get <irony huh?> is something like.
.512 .515 with a shi*load of duration i can get those specs tomorrow hes sacrificing lift, for the durationt hat will carry it to the top end when i got look at the block and crank they are done yes! and the crank got away with a good polish block was also decked .10 or .12 piston will only be int he hole .10 now. with those big domes i am stressing piston to valve clearance!

Originally Posted by pat mccarthy

well i just can not say but if he well go that way the springs will take it all parts need to be light or in time the springs will get killed i would but isky spring s and the lite lifters they have

Some lightweight components would help it live a little better. Been out of the engine stuff for a lot of years, would like to try some of the newer stuff sometime....

Originally Posted by Dave Severson

Some lightweight components would help it live a little better. Been out of the engine stuff for a lot of years, would like to try some of the newer stuff sometime....

I suppose duration in the 280 range? Would be close to what my old Henry skinny block liked.... Circle tracking (chebbie 355) we ran .515, think the duration was 282. Ran like gangbusters at the end of the straight, right at 7,000 revs.... car weighed 2550 and a 3 speed trans running in 2nd gear....

on the sand drag stuff i seen stuff hit when it should of never hit cut the seal right off the guids and hammer the top of the guild s with triples the weight and the spring just can not keep up and starts to jump up and down it just can not hold up then bad things hapen

Originally Posted by gassersrule_196

the cam my friend dave is telling me to get <irony huh?> is something like.
.512 .515 with a shi*load of duration i can get those specs tomorrow hes sacrificing lift, for the durationt hat will carry it to the top end when i got look at the block and crank they are done yes! and the crank got away with a good polish block was also decked .10 or .12 piston will only be int he hole .10 now. with those big domes i am stressing piston to valve clearance!

Make sure you use some clay and check the piston to valve clearance, always used .100 clearance as a minimum...... Don't know if that is accurate for a chebbie or not????

yes 100 works that cam that i posted is very old and it at av282/292

Originally Posted by pat mccarthy

on the sand drag stuff i seen stuff hit when it should of never hit cut the seal right off the guids and hammer the top of the guild s with triples the weight and the spring just can not keep up and starts to jump up and down it just can not hold up then bad things hapen

Yup, the heavy valves and pushrods can make things go bang that have lots of clearance!!!!! (Please don't ask me how I know this! )