06 SS/SC g85 Cobalt, it's going to be a turbo swap I just purchased BlkWdoSS's kit, now to the question.

How much spring pressure is too much for the hydraulic lifters?

The articles I have seen don't seem to have reason behind going to solid.

Does anyone know off hand what the spring pressure is on the Bates Engineering?

Is Supertech a quality brand?

 

It has nothing to do with spring pressure, everything to do with cylinder pressure

 

you have not understood what you have been reading then

spring pressure has an affect on the exhaust side of the head(and intake) as the lash adj have to handle 100x more pressure then the intake side of the head due to post combustion pressure solid lash adjusters are not just put them in and forget them you will need to do alot of maintenance with them you will have to check the lash regularly and if one is to far out of spec you need to re machine one to replace it

these are not for everyone not many people will have a need or the want to or ability to keep up on maintenance on a solid setup

 

So I couldn't put too stiff of springs and collapse the hydraulic lifter? What springs would allow 7500-8200 rpm red line?

 

if you cant understand what you are reading then dont mod the engine

 

This is what I have gathered in the time I have been reading stuff on this forum, I may be way off but I hope to be in the ballpark with my answers.

The hydraulic lifters were designed to run at the stock spring pressure and stock oil pressure. Raising spring pressure will cause them to collapse due to there not being enough oil pressure to counter act the increased spring pressure. The added cylinder pressure of boost pushing up against the exhaust valve intensifies this times 1000. A larger cam shaft with more duration and lift will also intensify this. Any spring pressure over stock will cause the lash adjusters to collapse. People have had good luck making power with aftermarket cams and springs using the stock lash adjusters. However diminishing returns come into effect earlier then expected.

The supertech 76lb kit is the lowest rated spring I have seen, and from the looks of it people have had good luck with it. If you are going to rev past 7500 you should consider more then just a set of valve springs. Cams, Ported Head, ATI Damper, Balance Shaft Deletes all should be considered when reving high.

If you haven't read through this thread I recommend it. It answers your questions better then I ever could.

https://www.cobaltss.net/forums/2-0l...r-cams-315216/

 

QFE. This is why we have so many threads stating "I did this to my car and it won't work now. HELP." I know this sounds mean but before doing anything major it is always better to learn and understand everything you are doing rather than just throwing money and parts at it.

 

I'm not just throwing money and expecting it to work. I'm looking for specs so I can make a better decision. I know that getting the combination just right is the key to having a phenomenal car.

I didn't make this post because I couldn't comprehend the inner workings of a motor, I didn't read that "Why dont ecotecs perform better with cams" because I had no interest in cams, just the springs and some specs of the Bates and if Speedtech was good or not.

So for anyone looking for the reasons to go or not go solid lash, go read that damn thread "Why dont ecotecs perform better with cams" because that's what you're looking for and someone needs to change the thread name to something that mentions springs/lash

 

75# supertech kit.

 

Lol, is there actually a 76lb kit or did I mix the numbers up?

 

Engine

 

I guess I hadn't seen the 75lb kit before. Oh well it was close lol.

 

 

And I have read your thread about doing the spring and cam install only 20 times Staged. Fail on my part I guess

 

its all good man.

 

dsm on left ecotec on right do i need to say more

 

Wow!!