UnleashedBeast

iTrader: (2)

I have read thread after thread about 8 PSI being the "safe" PSI to run on a stock bottom end LS1, but what about 10 PSI? I know Bob @ EPP ran his stock high mileage LS1 up to 15 PSI to see how long it would last, but I haven't read an update on that. My plans are the D1SC intercooled setup with my mods listed below.

Stock heads (853)
TR224/227 .569/.572 114 LSA Supercharger/nitrous cam
Comp 918 springs, TR Hardned pushrods, Ti retainers
Pacesetter LT headers
3" true duals, no cats, H pipe, twin Flowmaster Super 40s dumped
LS6 intake
Textralia clutch OZ700, stock M6 tranny w/ upgraded slave
HPTuners for the tuning on 93 octane pump gas
stock 10 bolt w/ 3.42 gears for now, but a 12 bolt will be in order to hold the power

So, is 10 PSI possible for a daily driver or am I asking for trouble? This car is a daily driver and I want more than 500 HP at the wheels.

Also, what can I expect of my fuel mileage after the supercharger under normal driving conditions?

Last question, I know that the Fbody setups include dual intercoolers, but I like the look of the single intercooler in front of the radiator (makes it visible). Is this setup more efficent than the dual intercooler setup? Does the front mounted version make cooling more of a problem for the radiator?(see pic below, borrowed pic)

LSONE

iTrader: (1)

a FMIC is alot better than the stock procharger intercoolers, you will also want an upgraded tensioner. 10PSI is fine on stock internals, as long as you're prepared to buy a new block "just in case". Chances are they you will be fine with it, but you never really know untill its to late. IIRC, SDCE makes the bracker you will want and synergy motorsports makes a compleate FMIC setup for the procharger.

UnleashedBeast

iTrader: (2)

Yes, the SDCE bracket/tensioner was a definete b/c the ATI tensioner is to noisey at idle IMHO.

We put a D1SC setup with FMIC @ 10 PSI on a C6 LS2 vette Sunday and the ATI tensioner makes it sound broke @ idle speeds.

UnleashedBeast

iTrader: (2)

OMG!!!! 1100.00 for a FMIC setup, is it really worth the upgrade?

LSONE

iTrader: (1)

Oh, and as for your other questions, gas mileage shouldn't fluctuate too much as long as you stay off the throttle, but will go down alot once you get into the boost. the FMIC setup is much more efficient than the dual intercoolers, which dont cool very well. Radiator shouldn't have any air problems, as all of the air that normally goes to the rad. comes from underneath and is directed forwards. As long as you make sure that there is a nice gap between the two.

and like I said earlier:
are you asking for trouble? yes, any time you push the stock internals like we do you're just asking for it. chances are low from what I've seen, its a calculated risk.

I plan on running about 8-9psi on the stock internals with a turbo/6.0l heads/cam, so my problem will most likely be overpowering the ropds, but cylinder pressure.

Blackbird

it does add up quick.

thats a fmic, a mondo bypass, all the pipes, couplers and tbolt clamps.

price it out. the parts alone get close to that pricetag and he of course needs to get paid for time and effort.

it's certainly doable yourself if you have a chop saw and a welder and time. if you want something that just bolts in then you pay for it.

UnleashedBeast

iTrader: (2)

Yes, I have heard from reliable sources that the stock crank can handle loads of power, but the rods couldn't.

LSONE

iTrader: (1)

thats why I'm going turbo, because after all the upgrades, it comes out to either the same price or even a little more. if there was a way to just buy the head unit and bracket from procharger, send it to sdce and buy the fmic kit, i would be great. but buying a whole kit, then upgrading everything except the head unit is way to expensive.

LSONE

iTrader: (1)

stock crank can more power than any of us will ever throw at it, but the rods and pistons are only goot to about 550ish hp, after that its a large gamble.

Got Me SOM

iTrader: (2)

as you know the ati blows a lot more air than the vortech, i would not recommend 10 psi on a stock bottom end. too damn risky.

you should easily be over 500 with 8 psi and that cam.

EPP

iTrader: (22)

We cracked the #7 piston this year in the ringland area. Once we get a little time we're going to put my engine together with Callies Compstar rods, Diamond pistons, Patriot heads, and our Comp blower grind camshaft. With the same pulley combo I had before the 15 psi I was making will be reduced by the better flowing heads and by the cam to approx 12 -13 psi. My 540 rwhp should go up to 650+ or so. I'll be using a FAST 90mm intake along with a Nick Williams 90 throttle body.
I'll most likely go with an OBX intercooler and make my own tubing for a front mount intercooler install.

The new for '05 4.5" thick ATI ProCharger intercoolers are doing a much better job of cooling the heated air at higher boost levels. These intercoolers should not have any problem keeping the temps down in the 10 to 12 psi range, and would keep the cost down for you. Bob

UnleashedBeast

iTrader: (2)

Bob, thanks for the update on the high mileage high PSI stock LS1 car.

and al the other info. I might just do the 8 PSI with the larger intercoolers from ATI.

Avengeance

iTrader: (4)

Bob... Ive been meaning to ask, and Im sure its been asked before, how come at 15psi you only made 540rwhp? Was it on a Mustang dyno?

TrakDay

iTrader: (7)

My car makes 8.5psi of boost at 7k rpms with a 224/228 blower cam and I am making 551rwhp and 457 rwtrq out of my GTO! I don't think with your mods listed you will need 10psi to break 500rwhp!

2K2CamaroSS

iTrader: (18)

I'm runnning a little under 10 PSI (like 9.5) on my setup for a while now and haven't had any issues. I've got 600+rwhp, with the D1, SDCE, SynergyMotorsports FMIC kit, Moser 12 bolt.

Gas Mileage varies. I'm pretty hard on my car and get about 17mpg. You are obviously going to have to get bigger injectors, upgrade the pumps, and get a decent tune. I think motor longevity has a lot to due with the tune, and your driving style.

02' hawk

iTrader: (6)

I'm running the stock 8lb with patriot stage 2 heads and a small cam and makeing 520 rwhp

Got Me SOM

iTrader: (2)

trak day how come your car doesn't put up the time though?
Dave made less horsepower than you but schooled ya on the tree and held ya off the whole way down..

EPP I don't think it will advantageous to go with a 90 tb and manifold, you'll lose velocity and the blower will have to work a lot harder to make the power to pressurize the intake.

doski25

"We cracked the #7 piston this year in the ringland area."


My guy that is doing my car says that #7 piston pops all the time when people start pushing 515+ HP LS1

doski25

"So, is 10 PSI possible for a daily driver or am I asking for trouble? This car is a daily driver and I want more than 500 HP at the wheels."

#1 as posted above, I'd hate to see your piston pop, but

#2 maybe its cause I'm from MN, but if you have the money to have a 500 hp LS1, why beat on it everyday? Why not buy a 1500 Dodge Omni for work, and the bad boy for honies?

Blownramair

Hey, just curious... have you ran your car with this setup? IF so, what did you run et&mph? I basically have the exact setup... thanks

J