DavidDeco

Assuming 93 Octane gas and:

PowerFC, CB, Hi Flow Cat, DP, Large IC, Perf Fuel Pump, Rising Rate Fuel P reg, 1300 cc injectors, and Pettit cold air intake. STOCK TURBOS but Streetport, 3mm Apex seals, just rebuilt.

What's a reasonable, around town PSI and what's a fairly agressive but relatively safe PSI for street racing limit?

Thanks.

GoodfellaFD3S

iTrader: (213)

That sounds very similar to my setup, minus the 3 mils. I run 13 psi (~.91 kg/cm^2 on the pfc commander)around town, and 15 psi (~1.05) when I'm feeling naughty . I am tuned very conservatively (high 10s, low 11s a/f on boost) and make sure to get brand name 93 octane. You didn't mention an ignition amp--are you running one?

WhtRocket

So assuming the ECU is tuned (dyno'd) for all that , as you imply, it's limited by the stock turbo's ability to flow before it's outside it's operation efficeny.

My GUESS is 13psi is safe, 14psi should be OK and 15psi is likely to result in pretty short turbo life. What does "large IC" mean.

That's just my guess. Best I remember the stock IC's are not very good at/above 15 psi. **** you got money, just get a big single.

Nice setup.

DavidDeco

yeah I do have one, forgot that because it just came in today and I sent it to the guy doing my car. Its an HKS Twin Power.

What's brands are best? I'm assuming Amoco & Mobil at the least?

Thanks again.

DavidDeco

Well, the ECU isn't tuned yet. The car hasn't been finished yet (seal went out a few weeks ago after 8 years). I was told the base map would get me by until I could take it to Pettit whose going to tune it for me. Hopefully in a week or so when I can do the several hour drive.

The Large IC is the Pettit Cool Charge 3 SMIC. I said "large" because its bigger than the Cool Charge 2 and much much bigger than the thing they call the stock IC.

94touring

On the stockers, around 15psi is pushing the life span. But on a single turbo you can go higher on pump gas, as long as you know how to tune. I'm running 18psi daily on 93 octane.

GoodfellaFD3S

iTrader: (213)

How much power are you putting down at 18 psi? Just curious, as I'm going single turbo sometime soon...

jr

Are you using the stock MAP sensor? I thought it would limit the boost to 14.7psi/1bar with the PFC if you were running the stock MAP sensor.

lzyassmofo

dont forget about a little pre mix action . i dont know if you guys do this, but from some guys ive talked to that used to race 3rd gens in solo events and autocrossing, at higher boost on stock turbos (14psi and up) a little gas tank brewery can save you a lot of head ache and add a lot of life to your engine. the biggest problem with running in excess of 14 psi is heat. so these guys used a mixture of race fuel (at least a hundred octane) and 91 or 93 octane, usually about 50 50%, and about 1 ounce of red line 2 stroke motor oil per 3 gallons of gas directly poured in the tank (about 5 ounces total per tank). ive been using this mixture religiously when running in excess of 14 psi on my stock turbos and on stock apex seals ive never had a problem, even at 80k miles. the 2 stroke motor oil is an amazing agent in terms of keeping the seals lubricated and everything running smoothly inside the engine. i guess its not all about getting your car to run colder, but also getting it to run more efficiently under higher heat situations. i also run about 3 ounces of the oil per gas tank even when im not running hard or at higher psi, just for good measure.

WhiteRXseven

Ryan...

Let me know if you order/buy any more premix..
I wanna order some with ya, next time you get some.

I've never used premix in my gas. after 130k miles
I think its about time..

lataz

RedFD

I never understood why people put premix in thier car when we already have oil injection. Seems like it would be overkill. I talked to Peter about this and he told me not to do it. He says all it does is lower your octane. If you have 130k and have never used premix......... maybe its because you dont need it. Just a thought.

GoodfellaFD3S

iTrader: (213)

Peter who? Peter Pan ?

Just messin' with ya man

94touring

I haven't dynoed at 18psi, but did dyno at 15psi. I put down a disapointing 370rwhp, but did make 350rwtq. I decided to turn the boost up to 18psi to compensate for the loss of power. There is a big increase in power felt between 15psi and 18psi, and I feel that i'm around or slightly above 400rwhp......not to mention an increase in torque.

RICE RACING

I have a single turbo and I run 20 psi boost in it all the time on 98ron pump gas which is similar to your 93mon gas.

I use a 200:1 pre mix in conjuction with the OMP and use water injection.

I made 471.9rwhp (corrected DIN standard) on a aussie dyno, wich reads a bit less than a dynojet.

As long as your charge temp/water temp and ignition parametersare ok you can run this boost no worries, the WI helps, but i have herd of people running this boost with out it on pump gas (not sure of their power level though) as the boost is one thing, how much power you make at that boost is what is important cause it tends to tie in how much pressure is in the combustion chamber, which in turn pushes the auto ignition limit of the fuel you are running.

Oh, I use 11 heat range plugs too.

regards

Peter

94touring

Hey Rice,

Are you running a haltech, if you are could you send me a map so I can look at your settings.

Thanks,
Dans3300@juno.com

RICE RACING

I am running an Autronic SMC, about the only person in the world ! ... LOL

94touring

Thats cool man, thanks anyways

Autronic#1

SMC on a rotor rice, oh the power you are giving away for want of a sm2

chris