lifter mods

[gectek]

depends on the RPMs you are going to pull. lower than around 6k i would say no dont do it.

[1988GTU]

poop.

[923.4v6]

depends on the RPMs you are going to pull. lower than around 6k i would say no dont do it.

Its the 272 which is going to 6200-1 6000-2 and 5800 3rd gears.

[gectek]

stay with the stockers...they are good enough. you would need a bigger cam than that imo to justify it. or a higher rpm limit

[MidnightriderZ24]

id recommend it anways, our lifters are junk factory.

[Driver_10]

Ill be spinning a touch faster.

7200 rpms at all shifts with 6500 peak power band and comp-cams #122 springs. Safe redline of 7500rpms. Absolute red-line of 8000rpms

If thier are any doubts that this is is feasable with modded hydraulic lifters, let me know now. Otherwise Im sticking a set of solid lifters in the motor.

Sorry about the thread-jack, but it seems like a good opportunity to get an answer.

[gectek]

solid lifters will give you more power in the upper rpms with a small sacrifice down low.

[MidnightriderZ24]

how will u adjust for lash on solid lifters?

[gectek]

adjustable rocker arms or adjustable pushrods, or the correct length pushrods.

[torq455]

you'd have to have adjustable rockers for solid lifters. they wear over time, and tightening them down more is how you keep the appropriate clearance.

[Driver_10]

I was intending on using Summit 1.6:1 sbc adjustable roller-rockers. Since Im using a stage-3, off-the shelf WOT-TECH 3400 turbo cam, I dont think that there will be a need for special-length push-rods.

If I can pull off 7500rpms without valve float on modded hydro lifters
then Id rather take that route. If not, then Ill use my solid lifters.

[Superdave]

you still should measure for correct pushrod length. Your rocker geometry is going to be off and with spinning the RPM's you are planning i wouldn't risk anything.

I thought SBC rockers wouldn't work for some reason....

I seriously doubt you'll float the valves with good springs and the modified lifters, With solids you might make a tad more HP but having to regularly pull the valve covers is what turned me off from them.

[torq455]

SBC rockers won't work, although, i have a strong theory that SBC with center bolt rocker covers would work. my Dad had a set of 1.6 roller tips and they looked very much like mine.

rule of thumb: if you change the cam, you change the pushrods.

[gectek]

i have tried the narrow body ones before on my heads...they wont work right. the tip is too large and hits the retainer instead of the valve stem unless you use a +.050 retainer/lock. I tried both the self aligning and the non and both are too wide.

[torq455]

must be just enough to cause problems. they looked the same. i wasn't able to give that a try. good to know.