lifter mods

[MidnightriderZ24]

i know about the lt1/ls1 spring swap into the 60degree lifters, but ive got lots of spare lifters layin around, what about doubling up on the stock springs?

[RedBird]

after everything you've got done to this motor, you wanna cheap out now, instead of buying a set of LT/LS lifters to take parts from? you can geta used set of lifters on ebay for like 40 bucks :P i just missed a set, 87k miles, they sold for 35 shipped that also included the cam, pushrods, and guide, too.

[gectek]

take the 2 springs out of the stock 3400 lifter and throw them away
put teh 2 new springs from the LS/LT lifter into the 3400 one. reassemble, you are good.

[geldartb]

take the 2 springs out of the stock 3400 lifter and throw them away
put teh 2 new springs from the LS/LT lifter into the 3400 one. reassemble, you are good.

thats what i did and it took what seemed like forever. i think i had to take apart 24 and put back together 12 lifters.
but i was on the computer at the same time too.

[gectek]

you need 3 things. a good hook. a flat bladed screw driver. and a vice/spring compressor. then you will work fairly fast.

try doing 2 sets of lifters. they all look the same after a while. just make sure not to mix them up...

[MidnightriderZ24]

after everything you've got done to this motor, you wanna cheap out now, instead of buying a set of LT/LS lifters to take parts from? you can geta used set of lifters on ebay for like 40 bucks :P i just missed a set, 87k miles, they sold for 35 shipped that also included the cam, pushrods, and guide, too.

true. just lookin for some input i guess lol. im not worried about actually doing the spring swap. i guess ebay here i come?
EDIT: got a set of 50k ls6 lifters on ebay for 30 shipped! niceeee

[Superdave]

here is a pic i just took for comparison:

[1988GTU]

I wonder if this mod will work in 3.1 mpfi lifters?? ?

[Driver_10]

Ive got a set of solid, roller lifters. Im starting to think that maybe Ill go with a set of modded hydraullic rollers at this point. I think I might end up selling my solid roller lifters now.

[torq455]

Dave, in the picture, what are the larger springs for? They look like something out of a tranny.

Why are we doing this lifter spring conversion? Is it safe to assume it has something to do with high springs rates?

[Superdave]

the larger ones are the main plunger spring in the lifter, the smaller ones are for the check valve.

higher valve spring pressures and higher RPM's can cause lifter collapse, this is a good way to stop that. Also the stronger check valve spring prevents the lifter from fully pumping up till slightly higher RPM's than stock.. the lifter absorbes some of the cam lift and helps with idle quality.

[pocket-rocket]

Sounds like homebrew Rhoads lifters made out of stock stuff, lol.

EDIT: I think I remember hearing Rhoads lifters have a good concept, but don't work very well, so at least the homebrew ones with LSx springs rocks for you guys

[gectek]

werd

[Superdave]

I noticed a difference in idle quality and idle vacuum.

[923.4v6]

So if one is satisfied with his idle would it benefit to take the intake off to do the mod or a waste of time?