Anybody making big boost power on L92 heads
02-15-2011, 02:07 PM
#50
i saw 25psi at the dragstrip. No water pushed.
that was with the new ls3 lsx heads with the thicker deck. 9:1 compression , E85 with alky injections, 50/50 water alky mix. 18* timing past 6k rpm. 25 psi
that was with the new ls3 lsx heads with the thicker deck. 9:1 compression , E85 with alky injections, 50/50 water alky mix. 18* timing past 6k rpm. 25 psi
03-05-2011, 10:36 AM
#53
Don't let this thread die dammit!! This has been an awesome read! Just got some 317's and hoping with everything i can get enough together to go turbo this year with my 402, hoping they will bring the cr down to 10:1 and gonna run 93 pump with either an 88 or 91mm, nw 90/fast 92 combo. My goal is a seemingly realistic 650rwhp and run a 9.99 or faster driving to and from the track.
There is a lot of motivation in this thread with stock head results so keep it coming guys!!
There is a lot of motivation in this thread with stock head results so keep it coming guys!!
03-05-2011, 12:58 PM
#54
As most of you know, I wrecked my car last Dec. I found a new car, am moving the turbo up front, dropping some weight (car and driver, me) and installing a 10 point chromoly cage, mini tubs, and changinging the Moser axles to 5/8 studs, changed the intake, the radiator to a Griffin ($913) standing straight up, advanced the cam 6 degrees, SS hotside, turbine housing to a 1.08, and a few other minor things. Hope to get the car down to 3400pounds and make 1000rwhp and almost instant boost (I have a NX spray bar installed in the new manifold just incase boost spool is slower then I want or if I need up to a 300 shot to get the edge on someone 
) I will post pics in my own thread later.
I promise you with what you are doing you can easily make 800+rwhp and 800+rwtq with 17psi of boost.
Keep us posted.
) I will post pics in my own thread later.I promise you with what you are doing you can easily make 800+rwhp and 800+rwtq with 17psi of boost.
Keep us posted.
03-05-2011, 01:14 PM
#55
Wow sorry to hear about that but sounds like you're coming back even stronger!! I don't know how much boost this motor can handle even if i swap to aftermarket castings because it wasn't built for it. It has total seal rings with 1.5mm AP stainless top ring, 1.5mm napier second and a 3mm oil ring according to the build sheet i got from the previous owner of the tsp shortblock. Any thoughts? 800 rwhp would be NICE!!! But i'd have to look into getting an 80e for sure! LOL
03-06-2011, 12:11 PM
#56
The only thing I see is the compression ratio might limit your boost. Well not really, but with pump gas yes. If you can get it down to 10:1 then 10-12 psi on pump gas is not a problem with the right cam, intercooler, and good tune. Add some methonal injection for added cooling and det protection, and run high octane race fuel, you can go to 17psi. Depending on the head you might need to stop around there.
12 psi on my car made 650rwhp and trq.
I would expect your numbers to be better if you mount the turbo up front and size the piping right. I had mine on the rear, and I ran the cold air piping with 2.5" from the back of the car all the way to the intercooler with a million bends trying to keep some kind of decent ground clearence. Then it went threw a POS 180 buck Ebay intercooler. I had 8+psi delta P from the turbo outlet to the intake manifold. I am sure this robbed some nice power and contributed to the turbo lag. And the real reason I am installing this stuff up front and with a real ($950 Griffin) intercooler that is rated for what I am doing.
My point being, I would expect to see better numbers then my old setup from a kit that was much more efficient.
12 psi on my car made 650rwhp and trq.
I would expect your numbers to be better if you mount the turbo up front and size the piping right. I had mine on the rear, and I ran the cold air piping with 2.5" from the back of the car all the way to the intercooler with a million bends trying to keep some kind of decent ground clearence. Then it went threw a POS 180 buck Ebay intercooler. I had 8+psi delta P from the turbo outlet to the intake manifold. I am sure this robbed some nice power and contributed to the turbo lag. And the real reason I am installing this stuff up front and with a real ($950 Griffin) intercooler that is rated for what I am doing.
My point being, I would expect to see better numbers then my old setup from a kit that was much more efficient.
03-06-2011, 01:41 PM
#57
A lot of great points there! I just bought a set of 317's which will be combined with my nw90/fast 92 combo and using truck mani's and yes, 1 of those ebay type intercoolers but not that one exactly, but is around 30x12x4. I'm interested in running the EPP cam but i may give Speed inc, LME or VA Speed a call for one of there grinds. I'd like to have something with a little lope to it. I'm just looking to make enough power on pump to hit a 9.89 or faster and 650rwhp should get me there. The car should be around 3600rw. I'm interested in running a meth setup but not have the car tuned for it so a hiccup doesn't kill it. I'll add it after i have it tuned for just a bit of insurance. Eventually i can upgrade things but i'm just trying hard to get my foot in the door on somewhat of a decent budget.
03-06-2011, 04:37 PM
#58
650 will be symple for you to hit with that combo. I don't think it will take much boost at all. I personaly run a Virginia Speed cam, thier VTC-3. I know the specs but out of respect for Shawn I will not disclose them. If the I am thinking of the EPP cam you are talking about, we run one in a friends D1SC supercharged 6.0 Camero. Runs great on his blown setup but I don't think I would pick ot for a turbo build. I think it has a little more valve overlap then most would suggest for a turbo. You will need large injectors too. I would call FIC, they have great prices, are sponsors here, they have the tuning data needed for the injector tables, and they will not stear you wrong. I am about to order a set of 100+lbs/hr from them.
