Keep breaking front pump !!! Wtf?
 

ok,
lq9(heads,cam,intake,boost-9psi,etc.etc....)
4l60e (built professionally w/ all the goodies)
tci 3800-4000 stall converter with antiballoon plates

0 miles on it 1st. time car on dyno front pump broke. builder told me i installed converter wrong, told him fat chance. i've put bout 1000 in my automotive career.

put trans back in,
drove for 2 weeks, put 1500 miles on it.

parked car yesterday, started it this morn, put it in drive n nothing. checked it out and front pump broke again. wtf?

the tci converter has 1/8" play between fly & mounting pads. which is normal spacing before converter is pulled to fly and bolted.

stock flyweel.

everyone tellin me its bad converter, find that hard to believe.
maybe flexplate ballooning? crank end play(fresh build doubt it)

what are your guys thoughts? and have you had this problem?

Curt when I first read the post... first idea was converter not shimmed right...

TCI converter??

yup, tci converter. never ever had problems with tci stuff. and there is no shimming of converter.
with converter all the way into pump there is a 1/8" to flex. allowable tolerances even from g.m. is 1/8"-3/16" you can even go 1/4".

I usually like to see closer to 3/16". called tci and they said that 1/8" is exactly what they want to see, but that doesn't give you any room for minimal crank end play or flex plate movement @ high rpm.

if the tci converter didn't have the anti ballon plate welded on to pump shaft it would go farther into trans.

Im going with the converter, i had the same problem, I blew about two or three pumps then finally upgraded to a tci flexplate and torque converter and ive been good. For the record I had a stock flexplate and yank converter when I kept blowing the pump.

HEY, so you using the tci flex w/ a tci converter? i've been pondering that the flex is the issue.
thinkin bout just scrapin all of it and going with a new flex with vigalante converter. lot of $ though. i'm already out a boatload of $ from these mishaps !

Correct, TCI Flexplate, TCI 3500 stall, ARP Bolts.