Is it possible whitout racegas on a stock LT1 ?

 

6psi with what?

you can run 93octane and get plenty of power out of it without detonation, but id say invest in a BTM so you can retard timing 1 or 2 degrees per pound of boost.

 

Oopps its a p1sc and twin highflow ic on a stock engine.
So if i run 93 and above it shouldnt be nessesery to retard timing at all? In sweden we only have 95 and 98 oktan wich i equally to youre 91 and 93.5 and there is no big diffrence on the price so it isnt aproblem to run 93 here.

 

my appologies, i didnt see your sig.

i think you will be fine running pump gas, i have a friend who has a similar setup to yours running a 12# pulley on the P600B and he hasnt had any detonation problems.

 

Its not for my car (the one in the sig) its for a friends 93 z28 complet stock engine.

 

oh ok, then i dont see your friend having any problems with it on pump gas...i would still recommend a BTM to pull timing though, just to air on the side of safety.

 

Thank for the answer.

Anyone else having onother opinion?

 

although you can probably get away with full timing, I would reccomend a BTM and pulling it back a little.

 

Thanks
I asked a shop for a msd with boost/retard function and was recomended the msd6+dig and i didnt realize that it doesent have the boost/retard function (before i got it), so im gona return the msd 6+dig and buy a msd6btm insted.

 

Words of wisdom (boom !) trust me i learned the hard way !

pull timing out ... all gas is not the same and he will blow it up one time or anther ...... ) all it takes is a split second and the motor is toast not worth it in my book

 

YES!! I have a completely stock 97 Z28 and I'm running 8 lbs of boost on it with no problems. Stock tuning, full timing, exhaust, etc. We ran autotap on it and I'm actually seeing 26 degrees advance timing at WOT and on 91 octane gas. The car seems to like it. I have the ATI P-1SC twin hi-flow intercooler setup. Just get a MAF massager or MAF translator to make sure it's not running lean and you'll be fine. Everyone said I was going to blow up my motor, but it's still running strong. I'm spinning DR's with only 16psi of air in them going into 2nd gear! But the one thing to remember is, you have to know your motor. I bought the car with 42,000 miles on it and it has a very strong engine, so I supercharged it.

 

hmmm you must be one of the lucky ones ... how long have you been on 8 psi? Some can get away with that but I think it also has to do with the location of where you live (from your post you live in AZ) but it is not normal recommend to run such high boost on stock cast pistons ... Sorry bro you are living on borrowed time before boom. (the cast pistons will not take that abuse (8psi)

 

DrewZ28, On my car (in sig) im seeing 30 degrees (scanned with datamaster) all the way up to 6200-6400 rpm and 7-8 psi non intercooled (stock shortblock over 80000 miles).

But thats not stock tuning, on a complet stock car i scanned i saw 40degrees (at wot 4000-5500 rpm), so i dont understand way your car only show 26 degrees.

Maybee autotap and data master isnt compareble, any ideas?


Buy the way, a new msd 6btm for the stock 93 are on the way.

 

That is wierd. Maybe it's just different from OBDI and OBDII?

 

I don't know. Maybe I am just lucky. But I do know that my motor is a VERY strong motor. The previous owner agrees with that as well. But who told you LT1's have cast pistons? They actually have hypereutectic pistons, which are a step below forged. But I am running a twin hi-flow intercooler setup as well, maybe that's helping too. But I just made sure that the car is on the rich side, cause going lean is what'll blow the motor.