Stock lifters with 105# valve springs

[T-Punk]

Alright, im going to be upgrading to some new rockers soon and will also be putting in some 105# valve springs. Would there be any problem using the stock lifters or should i put in the comp cams lifters? I will also be putting on a turbo if that makes a difference. also is there any reason to put new retainers on cause i cant see one.

[WickEdSix9838]

there wont be any problems. I am running the 26918's with 130# seat pressure on stock lifters.

[T-Punk]

cool i just wanted to make sure.

[oil pan 4]

Those 105's can't be much stifer than stock. I bet there real close to what the stock springs are.

[T-Punk]

I am putting in 1.9 ratio reworked rockers so i figured i would need stiffer springs to prevent valve float. i didnt think we had springs that were that stiff plus i have 60K miles on my car so i think its just a good idea to go ahead and replace them. The others i was looking at was the ls6 springs but the 105's arent much more. The other upgrade im doing with this will be to put the lightwheight pushrods from intense in.

[98Camaro3.8]

According to ZZP, stockers are around 60 lbs.

[T-Punk]

I didnt think we had very strong springs. thanks for the info.

[WickEdSix9838]

the stock springs that came off my heads were at 45lbs on the seat with 60,000 miles on them.

[RedFrk13]

I also heard ours are around 60. I would use LS6/LS2 which are 90 or the 105 you chose. The turbo will like those rockers. [img]smile.gif[/img]

[oil pan 4]

New springs suck or your roller cams are just beating them to death.
I pulled springs that had over 80,000 miles from my 2.8L and had 80-95 lb of seat pressure left on them.

[grayman]

It seems from most literature from aftermarket high ratio rocker manufacturer (intense for instance) suggest the LS6 springs (90# i think). Our stock springs are about 50 or 60#. I know you can use your stock retainers with LS6 springs...dont know for sure about the 105's.
I guess make sure the light weight push rods are a good match (oil passage) for the stock lifters/aftermarket rockers.
I do get valve float at about 5600 + rpm with the 1.9 aluminum rockers. (just a bit...but enough to notice) Very low miles on car...less than 10,000. Will be switching to LS6 springs very soon. I will update my 'rocker report' after evaluating spring upgrade. I sure it will make a good difference.
good luck with your new rockers T Punk.