Stock, LS1, LS6 spring info

[Superdave]

daily driver with a healty lope to it, im sorry i am looking lower dur and higher lift to keep the driveability and not worry too much about lope

I've kept the overlap around 50 degrees so it shouldn't lope too bad.. it'll deffenetly be noticible though.. lol

that was the goal, to have the cammed up sound, making decent overall power but still have a good power band and good vacuum for driveability.


If he decides to switch springs then we can go your route, something similar to the MMS stage 1 would work nicely.

[gectek]

daily driver with a healty lope to it, im sorry i am looking lower dur and higher lift to keep the driveability and not worry too much about lope

[Superdave]

i think u have it backwards...the lift will get the air in, dur is more for time it is allowed in, and usually better for higher RPM than lower. the higher lift will help out everything and if you keep the same dur, it will increase all through the RPM, still be choked a little at the top, but help out alot with bottom end

If you look at the flow numbers under .500 lift it's still flowing tons of air. Besides, the valve spends more time below peak lift than it does at peak. The longer you can keep it open the more air the piston will draw in.

I've got all the specs in DD2K and it's showing some pretty healthy numbers.

240 HP/246 TQ with stock compression, ported top end "HP Manifolds" --(meaning the 3500 Malibu's). I'm not sure how much the stock 3400 TB flows so i put in 300 CFM for now... .465 in/.470 ex with 270 advertised on both.

[SappySE107]

I know LS6 have worked at .533 lift.

[gectek]

i think u have it backwards...the lift will get the air in, dur is more for time it is allowed in, and usually better for higher RPM than lower. the higher lift will help out everything and if you keep the same dur, it will increase all through the RPM, still be choked a little at the top, but help out alot with bottom end

[Superdave]

why such low lift....stock 3400 is 436

we're trying to keep it streetable since it's a daily driver.. I kept the lift lower and upped the duration to get the air in.

the LS1 springs are allready installed on the heads, also didn't want to have the expence of changing them...

we're talking about a lift difference of .044 which is hardly anything... lol the longer duration really helps it though. Maybe LS6's are worth the added expence. I bet someone would buy the LS1's.

[gectek]

but ull trust the LS6 til about .520 or so right

[SappySE107]

I thought I posted in another thread on their specs. They aren't much better than stock but I don't know how much lift you can go. After seeing them coilbind on a stock 2.2 with the 2.2 retainers, I don't trust them for much over .430 in our motors.

[gectek]

why such low lift....stock 3400 is 436

[Superdave]

The pressure and coil bind numbers aren't right. I wish this thread would die honestly. Those measurements were for what scott at the machine shop here felt was a good max lift. They are not true coil bind. .53x has been used on the LS6 springs, though I prefer to see .52x max personally and use the comp 26986 springs for higher lift or machine the heads to increase the install height to 1.75"

So in that case, what's the real specs on the LS1's then?

we're looking at running around .470 lift. Install height is 1.682.

[SappySE107]

The pressure and coil bind numbers aren't right. I wish this thread would die honestly. Those measurements were for what scott at the machine shop here felt was a good max lift. They are not true coil bind. .53x has been used on the LS6 springs, though I prefer to see .52x max personally and use the comp 26986 springs for higher lift or machine the heads to increase the install height to 1.75"

[Superdave]

http://60degreev6.com/local_links.php?catid=15

should all be in there

[rvbilly]

2.8 & 3.4 Crate Spring Rates ???

Hi , mayby a bit off topic but was curious if anyone knows what a stock 88 2.8 HO spring is rated at , and the same for the GM 3.4 Crate engine spring, My cam will only have a max lift of .456 inch so would the 3.4 crate springs be a good choice ? Thanks Bill..

[Superdave]

Ok, i don't get it...

LS1
1.7" 106#
1.3" 177#
Coil Bind 1.290

that means safe lift is .410 with those springs.. when stock 3400 lift is .430.

Has anyone ran higher lift on the LS1 springs?

[gectek]

cool, the 772 is the tit retainer. also what locks were u using for those, the hardened steel or stock, because the stock 3400 locks are about 2 or 3 grams lighter for the pair than the hardened steel from comp