Girly lifters

[littleben]

Been using comp link bar lifters on a 502 big block. Changed to factory style lifters with the factory yoke and lost 15 hp. Trying to compete in a class that requires factory lifters. What happened? I think he factory lifters are bleeding down and loosing both lift and duration. Can I shim them to limit travel? Or just bury the plunger close to the bottom, ( with the probably a longer push rod) help!!!!

[F-BIRD'88]

Stop racing with the girls.
Real men set there own valve lash and bait their own hook.

[af2]

I think it .050" to bury the lifter.

[bigjoe1]

SPEED SECRET of the day--- just run a much more heavy weight oil, like 25-50 racing- I have seen big HP increase on the dyno by just running the 25-50 weght oil


JOE SHERMAN RACING.

[Engguy]

SPEED SECRET of the day--- just run a much more heavy weight oil, like 25-50 racing- I have seen big HP increase on the dyno by just running the 25-50 weght oil


JOE SHERMAN RACING.

I wish you wouldn't give out all the secrets Joe. Let them use that girly water viscosity oil.

[F-BIRD'88]

SPEED SECRET of the day--- just run a much more heavy weight oil, like 25-50 racing- I have seen big HP increase on the dyno by just running the 25-50 weght oil


JOE SHERMAN RACING.

I found this very critical and effective in eliminating pesky annoying hyd lifter noise at idle
using conventional hyd lifters (HT817) and extreme energy hyd cams.
10w 30 passenger car oil was noisey. 15w-40 Rotella was a lot quieter.
Don't know if it improved power or lifter function at high rpm
but it sure didn't slow the car any. Seem to get very good rpm out of this motor
with a hyd cam/normal hyd lifters and streetable spring pressure. No tricks required.
Normal 1 turn lifter preload setting.
The oil quality and viscosity may very well be a Speed Secret.
Normally I shy away from hyd cams whenever the motor is going to see more than 6000 rpm.
This one buzzes pretty good. (SBC) A big block has a much heavier valvetrain.
The high rpm valvetrain dynamics are a lot different than a SBC.
HYD roller cam lobe designs that work well in a SBC relatively light weight and usually less rocker ratio may not work that good in BBC's.
Hyd lifters cannot tolerate bounce, loft or oil bubbles/foaming.

[ap72]

Id just shim the plunger to limit travel to .015 or so. Its a pretty common method.

[bigjoe1]

I have never seen any of thoser tricks make any real difference at all== Total waste of time and money. The cam lobe has the most to do with everything


JOE SHERMAN RACING ENGINES

[LSP]

All of the NHRA stockers guys need to stop limiting the travel of their lifters and put in 25/50 oil so they can go faster.....

[monte442]

All of the NHRA stockers guys need to stop limiting the travel of their lifters and put in 25/50 oil so they can go faster.....

Yeah,OK.You try it and let us know how it works.

[littleben]

Ok, i appreciate the information, what are folks using to shim the plunger?

[donc]

Ok, i appreciate the information, what are folks using to shim the plunger?

I use tool steel.

[CamKing]

Will the GM LS7 lifters fit in the Big Block ???

They handle more pressure then any other GM lifter.

[littleben]

I don't think the ls7 lifters will work, or any sbc factory rollers. The bbc factory style roller has the flats on different sides than the small block for sure and probably the ls7.

[Bob Hollinshead]

Ok, i appreciate the information, what are folks using to shim the plunger?

I use tool steel.

Don, are you buying round tool steel stock and machining slugs? any special shape or clearance? run it at zero lash?