Stock shortblock and superchargers

There is no answer, that's why people aren't posting here I think.
Same cars, same boost, same tune....one could blow up, the other last 80K miles. There's just so many variables.

So here's the bottom line: be prepared for the motor to go....eventually.

thats a tough question and there is no definitive answer. I ran a '98 cobra with a stock pulley s-trim and a 4" powerpipe for about 20K daily driven miles, over 3 years. I saw about 9psi, maybe 10 on a really cold night. Car made about 450/380 SAE. Two weeks before I sold it, I had a leakdown/comp test performed, and it was as good as new. Tune was right at 11.9 to 1 WOT.

Most of the "answer" lies in the condition of the motor before you plop the blower under the hood. Was it a mid day Wednseday car or a late afternoon Friday car? Those two names on your block will have alot to do with how durable that hand built, 9.85 comp motor will be. A blower (even tuned conservately) will definitely "root out" the weak points of the build alot quicker than running NA. So, to make a long story short, how lucky do you feel? Even taking all precautions and running proper fuel and tuning components, thats what it boils down to.

I kind of felt on borrowed time at three years, so I opted for a change.

you should have no problems with 8#'s. once you start playing with smaller radius pulleys for more boost is when it catches up to you.

This is kind of a depressing thread. I just bought an '03 cobra, even with a supercharger I really can't believe the motor will konk out anytime after 20 or 30k miles. I would hope to get 80-100k at least.. am I dreaming? (I hope not for what I paid for the car.. a vette will last forever)..

No, no, no, no, no.....you are fine man. Your car has a steel block, forged crank, rods, and pistons...it was meant to have a supercharger on it. Us pre 03 Cobra guys have an aluminum block with forged crank, but that's it....plus our compression is 9.85/1 vs. your 8.5/1. The 03+ Cobra's are a whole new beast....have fun with it.

My car will be done this week....after I blew the motor I had the aluminum block machined by Diamond....then put in manley rods and Diamond pistons (same 9.85 compression), Cobra crank, ARP bolts, billet oil gears, P&P'd the heads....it is now made to handle boost.