Getting STS, need advice...

**kealap** · 03-26-2007, 03:27 AM

Ok I'm getting an STS turbo kit, just the base kit adj from 5-8 ps1 and the 60-1 turbo. Already have roughly 400 rwhp. If I run 5 psi, and have plenty of fuel( walbro 255 hi press pump, 42# inj.) this should be right at or a little above 500rwhp right? Will the stock short block take it? Gonna have it towed to the tuning shop just to be safe.

**kealap** · 03-26-2007, 04:54 AM

I also found a killer deal on a set of LQ9 6.0 heads so I can drop the Comp. ratio with the bigger cc. This should help quite a bit with the boost right?

**schrysler** · 03-26-2007, 07:44 AM

I Was Told You Cant Do Lq9 Heads On An Ls1.....somebody Help Me Out

**OreoLt1** · 03-26-2007, 04:34 PM

As long as you have a good tune you should be close to 500 @ about 6-8 psi. We can't give you a 100% yes or no answer if your short block can take it because you never know what the engine has been through internally and it's all mechanical parts that can fail at any time.

But on a different note I have been running the STS kit on my stock 02 Z28 @ 5-8 psi. with no issues for about a year and a half.

I have actually heard different than "schrysler" stated. I think the LQ9 heads might fit. I know that's not much help but hopefully someone else will chime in with better info!

**M6HUGGERSS** · 03-26-2007, 04:39 PM

id be more worried about your clutch, tranny, rear....

with a safe tune your bottom end should be fine.... you may want to think about some meth inj. to keep your pistons happy.

**schrysler** · 03-27-2007, 06:23 AM

Hey M6huggerss Your Z06 Is Rated At 340 Rwhp? I Thought The Z06s Were Rated At 405 Flywheel Hp......

**7camaro7** · 03-27-2007, 06:37 AM

that must be when only one rear wheel is on.

**Spaz** · 03-27-2007, 09:34 AM

Originally Posted by 7camaro7

that must be when only one rear wheel is on.

Originally Posted by schrysler

Hey M6huggerss Your Z06 Is Rated At 340 Rwhp? I Thought The Z06s Were Rated At 405 Flywheel Hp......

probably not dyno tuned...

see my sig for a LS6 that has been dyno tuned...

**Spaz** · 03-27-2007, 09:37 AM

Originally Posted by kealap

I also found a killer deal on a set of LQ9 6.0 heads so I can drop the Comp. ratio with the bigger cc. This should help quite a bit with the boost right?

the reason behind getting lower comp heads is to run more boost...

**M6HUGGERSS** · 03-27-2007, 04:59 PM

Hey M6huggerss Your Z06 Is Rated At 340 Rwhp? I Thought The Z06s Were Rated At 405 Flywheel Hp......

the factory does not rate HP as RWHP. RWHP is "rear wheel horsepower"
the flywheel or factory rating for an LS6 is 405HP ... not RWHP.

the 340rwhp was stock. which would be 405hp - a 15% driveline loss...
equals 340rwhp.

**schrysler** · 03-28-2007, 06:38 AM

Hey Real Spaz, I Am Looking To Do An Ls6 Swap.....was The Ls6 That Much Better Then The Ls1

**02Hawk** · 04-04-2007, 06:36 PM

Originally Posted by kealap

Ok I'm getting an STS turbo kit, just the base kit adj from 5-8 ps1 and the 60-1 turbo. Already have roughly 400 rwhp. If I run 5 psi, and have plenty of fuel( walbro 255 hi press pump, 42# inj.) this should be right at or a little above 500rwhp right? Will the stock short block take it? Gonna have it towed to the tuning shop just to be safe.

With a good tune from like Nelson Performance it is more than do able. Im in the process of getting my STS kit for my Trans am and my buddies z28. Talked to Nelson and mike from STS about it and its do able and realistic.

**JD_Z28** · 04-04-2007, 08:24 PM

Originally Posted by kealap

Ok I'm getting an STS turbo kit, just the base kit adj from 5-8 ps1 and the 60-1 turbo. Already have roughly 400 rwhp. If I run 5 psi, and have plenty of fuel( walbro 255 hi press pump, 42# inj.) this should be right at or a little above 500rwhp right? Will the stock short block take it? Gonna have it towed to the tuning shop just to be safe.

I suggest you get a BOV no matter what. If you're an M6 it a must or you can cause all sorts of problems not reliveing the excess pressure. If you're an M6 you're going to need more then the stock clutch.

What ever you do don't hit boost without a tune. I would also recommend a cooling method (FMIC or Meth) if you're going to run more then 5.5 lbs w/stock compression. If you do the 6.0 heads then you would be ok running about 7-8 lbs w/out a FMIC.

When I was running 8.5 lbs w/out the FMIC I was trapping 95.5mph in the 1/8th, after the FMIC I was trapping 99mph with the same boost.

If you have any more questions feel free to PM me.

Good Luck,
John

**JD_Z28** · 04-04-2007, 08:25 PM

Originally Posted by schrysler

I Was Told You Cant Do Lq9 Heads On An Ls1.....somebody Help Me Out

The LQ9's are cheap and they have a 72cc chamber.

**02Hawk** · 04-05-2007, 03:20 AM

Originally Posted by JD_Z28

I suggest you get a BOV no matter what. If you're an M6 it a must or you can cause all sorts of problems not reliveing the excess pressure. If you're an M6 you're going to need more then the stock clutch.

What ever you do don't hit boost without a tune. I would also recommend a cooling method (FMIC or Meth) if you're going to run more then 5.5 lbs w/stock compression. If you do the 6.0 heads then you would be ok running about 7-8 lbs w/out a FMIC.

When I was running 8.5 lbs w/out the FMIC I was trapping 95.5mph in the 1/8th, after the FMIC I was trapping 99mph with the same boost.

If you have any more questions feel free to PM me.

Good Luck,
John

STS systems have an option for Tial BOV's and an option for 100+ psi Sequential Methanol Injection System... look into it before making any purchases

If your gonna do it, do it right and the first time.

**LS2Tuner** · 04-05-2007, 04:09 PM

Originally Posted by kealap

Ok I'm getting an STS turbo kit, just the base kit adj from 5-8 ps1 and the 60-1 turbo. Already have roughly 400 rwhp. If I run 5 psi, and have plenty of fuel( walbro 255 hi press pump, 42# inj.) this should be right at or a little above 500rwhp right? Will the stock short block take it? Gonna have it towed to the tuning shop just to be safe.

We have seen well over 500hp and they live. I wouldn't stress until your around the 600 mark.
Just remember that kind of cyl. pressure will call for good fuel too not just volume.