Heres my situation.. Bone stock 01 GT 4R70w, 327 gear, 60-1 Custom intercooled turbo setup ( blow through), 42lb injectors, 90mm L maf, SVT Focus pump w/ rewire, Mod Depot X cal 2 tune ( 93 octane), low boost, conservitive driver.
I finally got the MODULAR DEPOT sct tune in ( via X cal 2) installed the 42lb injectors with caution ( lubed O rings) installed Lighting meter and upon start up the car idled like complete ****, surging very badly.. Ok, no big deal right, that can be tuned out, and part throttle was fine. I turn the block, round a corner...get into a little boost, and before the motor even revs out, and hits full boost.. ( keep in mind, no noticable detonation) POW!, and then the worst sound ever, like I was dragging metal trash cans under the car, and then clunk clunk and she locked up!
So after pulling the plugs ( perfect burn on them, NO sign of detonation what so ever) , and checking over everything, it seems somehow with VERY little effort, on probably less thne 10psi ( didnt get a chance to see the gauge, although I have the Tial 38 gated for 10psi), in 1st gear, half throttle, and possibly the WORST tune ever, I completely whipped out the #1 piston ( laying in the bottom end), bent the rod in half and sent the rod through the block, causing the block to crack into the coolent passage, allowing the coolent to pass through and fill the bottom end of the motor with a mixture of coolent and oil.
I still havent pulled the pass side head to check out the damage to the valves or head, but hope to god it's repairable.
Needless to say, I applied for a loan yesterday, got the $4 grand and will be purchasing either a MMR 900 shortblock or MPH street/strip shortblock here shortly ( both consisting of Cobra crank, manley rods and ross or manley pistons) Hopefully this new motor will take to the VERY LITTLE boost I was running, better then the stock ****. That and I am geting a REAL tuner to tune the X cal 2.. and probably upgrading the fuel system with a BAP, and X tender on the mass air. Would like to push 450-500 rwhp this time around.
That's my little horror story for those who want to push the limits of their stock 2 valve without a trustworthy tuner at hand.
I finally got the MODULAR DEPOT sct tune in ( via X cal 2) installed the 42lb injectors with caution ( lubed O rings) installed Lighting meter and upon start up the car idled like complete ****, surging very badly.. Ok, no big deal right, that can be tuned out, and part throttle was fine. I turn the block, round a corner...get into a little boost, and before the motor even revs out, and hits full boost.. ( keep in mind, no noticable detonation) POW!, and then the worst sound ever, like I was dragging metal trash cans under the car, and then clunk clunk and she locked up!
So after pulling the plugs ( perfect burn on them, NO sign of detonation what so ever) , and checking over everything, it seems somehow with VERY little effort, on probably less thne 10psi ( didnt get a chance to see the gauge, although I have the Tial 38 gated for 10psi), in 1st gear, half throttle, and possibly the WORST tune ever, I completely whipped out the #1 piston ( laying in the bottom end), bent the rod in half and sent the rod through the block, causing the block to crack into the coolent passage, allowing the coolent to pass through and fill the bottom end of the motor with a mixture of coolent and oil.
I still havent pulled the pass side head to check out the damage to the valves or head, but hope to god it's repairable.
Needless to say, I applied for a loan yesterday, got the $4 grand and will be purchasing either a MMR 900 shortblock or MPH street/strip shortblock here shortly ( both consisting of Cobra crank, manley rods and ross or manley pistons) Hopefully this new motor will take to the VERY LITTLE boost I was running, better then the stock ****. That and I am geting a REAL tuner to tune the X cal 2.. and probably upgrading the fuel system with a BAP, and X tender on the mass air. Would like to push 450-500 rwhp this time around.
That's my little horror story for those who want to push the limits of their stock 2 valve without a trustworthy tuner at hand.