I think my motor let go after one day with the blower

98GTfromGA · Jul 3, 2007

I just got the car back yesterday from being dynotuned. AFR was 12.0 timing was very conservative. Last night I drove it about 15 miles. I go to crank it and it cranks fine I back out of a parking spot and pull up a few feet and the car dies. It started back up but was running real rough so I put it in a parking spot and it died again. I tried to restart it and it would catch but run rough and then die within 10 seconds. It spins over but it sounds like I can hear some loose metal in the block.

I am running a s-trim with the 3.60" pulley it made almost 10psi on the dyno. I'm expecting the worse, I think it broke a rod or piston.

Dusstbuster · Jul 3, 2007

Pull your plugs and shine a light in each cylinder and see if one looks FUBAR'd

lvmustanggt · Jul 4, 2007

damn brother I hope nothing wrong. That will suck real bad if something is but if you got money then get MMR 900 block and bam 900hp no problem

EPIK · Jul 4, 2007

Are u on the stock internals? How many miles? 10psi seems a little steep for stock internals....

thomas91169 · Jul 4, 2007

whats your mileage when you put on the blower? did you do a compression check before?

if 10psi with a conservative tune killed your motor, it was on its last leg to begin with.

id start with the easy stuff first, compression check, etc. if compression on all 8 check out fine, and you have fuel and spark, the engine will run even if you are getting rod knock. if by some chance you blew a hole through a piston or melted it, youll know when you find 0psi on one or a few cylinders.

head gasket could be a culprit, but the car would still likely run, youd have to lose half the gasket on one bank to not be able to run decent on a V8.

98GTfromGA · Jul 4, 2007

motor had 130,000 miles on it prior to blower install, it was fine it made 267 rwhp on the dyno when it was n/a, yes its stock internals and the 10 psi was at 6200 rpm probably more like 9psi at 5500

showstopper2 · Jul 4, 2007

AF ratio in the 12.0 range is too lean for a daily driver...you would be better in the 11.8 range at most. check your chip and make sure its in there snug. I had a similar problem when the SCT chip came loose. they ended up giving me a new chip as it was faulty and the problem went away. could also be the driveability side of the tune causing this. Hopefully you didn't hurt the motor on day 1

EPIK · Jul 4, 2007

I wouldnt ever throw a blower on a motor with 130,000 & stock internals. Thats like a time bomb waiting to blow.... Good luck though

Seraphitia102 · Jul 4, 2007

I'm afraid of blowing my motor too since my Mustang is a daily driver.

DBMSTNG · Jul 4, 2007

sounds strange. usually when a supercharged engine blows, it's under load/boost. my guess is that it's not the rods or pistons.

98GTfromGA · Jul 4, 2007

showstopper2 said:
AF ratio in the 12.0 range is too lean for a daily driver...you would be better in the 11.8 range at most. check your chip and make sure its in there snug. I had a similar problem when the SCT chip came loose. they ended up giving me a new chip as it was faulty and the problem went away. could also be the driveability side of the tune causing this. Hopefully you didn't hurt the motor on day 1

it was tuned with a xcalibrator so there is no chip

98GTfromGA · Jul 4, 2007

DBMSTNG said:
sounds strange. usually when a supercharged engine blows, it's under load/boost. my guess is that it's not the rods or pistons.

it would really make my day if its not, the car is not a daily driver btw I have a
F150 that I drive everyday

deftsound · Jul 4, 2007

EPIKGT said:
I wouldnt ever throw a blower on a motor with 130,000 & stock internals. Thats like a time bomb waiting to blow.... Good luck though

why? , i have a friend who has a blower on a 2000 with 145k miles, it's ran fine for 10,000 miles so far

deftsound · Jul 4, 2007

98GTfromGA said:
it would really make my day if its not, the car is not a daily driver btw I have a
F150 that I drive everyday

if its running rough it could be a LOT of things, anywhere from a vacuum leak to an unplugged MAF, not necessarely a blown motor

04YELLOWGT · Jul 5, 2007

As already posted check to see if any of your piping blew off from your supercharger to your intake it could also be a problem with you MAF.

Samething happened to me last year driving down the road I heard a loud wosh after going WOT, then the car ran rough and died. I thought I blew the motor but when I poped the hood there was pipe from my intercooler disconected.

As for the MAF being bad I just had this problem last week. I put a MAFia on my car and it was a POS and scewing up my AFR and making my car run rough or not at all. Pulled it off and car runs fine and a SCT MAF is going on Monday along with a retune!

deftsound · Jul 5, 2007

04YELLOWGT said:
As already posted check to see if any of your piping blew off from your supercharger to your intake it could also be a problem with you MAF.

Samething happened to me last year driving down the road I heard a loud wosh after going WOT, then the car ran rough and died. I thought I blew the motor but when I poped the hood there was pipe from my intercooler disconected.

As for the MAF being bad I just had this problem last week. I put a MAFia on my car and it was a POS and scewing up my AFR and making my car run rough or not at all. Pulled it off and car runs fine and a SCT MAF is going on Monday along with a retune!

This is the second time ive heard about the SCT MAF, i just bought the lightening MAF, is there a difference between the two?

smokin00GT · Jul 5, 2007

I would check all of your tubing for the blower, and for vaccume leaks. If you find nothing you could have spun the bearings. This could happen at high rpm like when it was on the dyno. Also 11.8 is where your AF ratio should be at. I spun the brearings in my engine 1 month after supercharging it.

98GTfromGA · Jul 6, 2007

I already checked for vaccuum leaks and the maf and everything is connected. When I get back from traveling I am going to pull the valvecover, I think it could be a rocker that came off

deftsound · Jul 6, 2007

wow this is scaring me, my car has 97k on the clock and i just ordered my s/c, i think i just wont WOT it and wait till i have money for a forged block...

DBMSTNG · Jul 6, 2007

deftsound said:
This is the second time ive heard about the SCT MAF, i just bought the lightening MAF, is there a difference between the two?

the SCT Maf's support way more power than the LMAF.

I think my motor let go after one day with the blower

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