Blew my 01 with a supercharger in 200 miles????

Himark · May 31, 2006

This car is actually a pal of mines (20k miles) and he has not pulled the motor yet. But here is what happened, He had a Vortec supercharger installed by the dyno shop here in town they tuned it did all the appropriate changes and when he picked the car up they told him his boost was running right at 12 PSI and to run no less than 92 octane. One week later the car makes a loud knock and when he went to restart the car it turned over like it was way advanced time then started and knocked very rapidly. I am guessing a spun bearing. Whats your guess here of the procuring problem?

cronin49 · May 31, 2006

12 psi is a lot of boost. What are the internals? Is it a GT or Cobra?

Himark · May 31, 2006

Stock GT motor

Gearbanger 101 · May 31, 2006

Himark said:
Stock GT motor

There's your answer. Not saying a stock motor won't run for a while sucking up 12psi (since a couple of memebers here are doing it), but you've got to have a really conservative tune and keep a nice rich A/F ratio to keep it happy. My guess is that it detonated, broke the piston ring land and took out at least one rod and piston with it. It might even be possible that he then smashed it/them into one or more open valves, which would most likely bend a valve and or break one or more of the cam feelers making a mess of the top end of the motor as well. Basically.....I hate to be the bearer of bad tidings, but when these things go, they go big. He's probably going to be looking at $2,000-$3,000 for a built short block.

....live and learn.

2001sleeper · May 31, 2006

who tuned this car?

Himark · May 31, 2006

"the shop" in Lincoln Nebraska. They said they had done tons of these without any problems. My pal asked him directly if 12 psi was too much and he said no it would be fine. My pal is not going after them but he deserves the right to broadcast there incompetence i would say.

DropTopPony · May 31, 2006

too much boost on a bad tune is my guess...
built shortblock is just a phone call away.

VPStang · May 31, 2006

damn...let us know how it turns out--meaning what the shop does for him...

03ghoststang · May 31, 2006

that is too much boost for a stock block, and the tune had to due with it too.....what kind of gas was he runing since a few states have that ethanol chit or something like that

timeless2 · May 31, 2006

Himark in thread title said:
Blew my 01 with a supercharger in 200 miles????

Himark said:
This car is actually a pal of mines

Is it yours or his?

Himark said:
"the shop" in Lincoln Nebraska.

Should have gone to either Dynosport in Lincoln or EJ's in Omaha.

Himark · May 31, 2006

VPStang said:
damn...let us know how it turns out--meaning what the shop does for him...

This is a whole other debate, I now both peeps positions and know the risks involved changing from stock. BUT if the tuning company is paid 1500 bux to tune a car and represents themselves as professionals in there field and make a blatent mistake, YES i do feel they should be partially or fully responsible depending on the severity of the negligence. In this case they have told him SORRY.

03ghoststang said:
that is too much boost for a stock block, and the tune had to due with it too.....what kind of gas was he runing since a few states have that ethanol chit or something like that

Was just looking at his dyno sheets and HP was 338 if that gives you an idea of how hard they were boosting it.

SamMan · May 31, 2006

338 seems low to kill a block.

Im putting down that and ~440 TRQ.

I wonder if he got screwed by the ethenol deal.

You should find out what the timing was set at and what the a/f was. Where are the dyno graphs?

VPStang · May 31, 2006

wow...1500 bucks to tune and then this...really sucks

and I'm guessing they're sticking to their guns about 12 psi being perfectly safe on the tune they put in...

Himark said:
This is a whole other debate, I now both peeps positions and know the risks involved changing from stock. BUT if the tuning company is paid 1500 bux to tune a car and represents themselves as professionals in there field and make a blatent mistake, YES i do feel they should be partially or fully responsible depending on the severity of the negligence. In this case they have told him SORRY.

Was just looking at his dyno sheets and HP was 338 if that gives you an idea of how hard they were boosting it.

VPStang · May 31, 2006

werd--his tune must have been really fudged--to be running 12 psi and only 338 hp...stevie wonder must have been tuning...

SamMan said:
338 seems low to kill a block.

Im putting down that and ~440 TRQ.

I wonder if he got screwed by the ethenol deal.

You should find out what the timing was set at and what the a/f was. Where are the dyno graphs?

Dope 97GT · May 31, 2006

12 psi and only 330hp seems a little odd and i still dont know what year if its a 96-98 that might explain a bit more for the low numbers and the thing blowin up.

Overall it just sounds like a bad tune unless he was beatin on it bad

timeless2 · May 31, 2006

Dope 97GT said:
i still dont know what year if its a 96-98 that might explain a bit more for the low numbers and the thing blowin up.

Thread title = 2001

Z28 KILR · May 31, 2006

That HP number seems really low to me. I had a V1 Vortech setup on my 99 GT that ran 360-370 HP with just some exhaust mods and a 90mm MAF. At 12 psi I was at 404 HP but like your friend my engine did not last very long.

Himark · Jun 1, 2006

SamMan said:
338 seems low to kill a block.

Im putting down that and ~440 TRQ.

I wonder if he got screwed by the ethenol deal.

You should find out what the timing was set at and what the a/f was. Where are the dyno graphs?

Got his dyno sheets today. The AFR was 11.9, 330.8 HP 337.2 TQ.

jstreet0204 · Jun 1, 2006

Himark said:
Got his dyno sheets today. The AFR was 11.9, 330.8 HP 337.2 TQ.

If those numbers are correct, I wouldn't be so quick to blame the tuner. Something was already wrong with the car.

jivepepper · Jun 1, 2006

Himark said:
Got his dyno sheets today. The AFR was 11.9, 330.8 HP 337.2 TQ.

He could have over reved it?

Blew my 01 with a supercharger in 200 miles????

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