BawlsZ28

iTrader: (11)

Okay, here's what I have(or had) on my car:
D1SC 7.65 LT1 balancer
Keyed Professional products SFI Damper
Keyed crank hub/crank w/woodriff key installed.
3.4 pulley-making 11# boost on my car

Here's what happaned:
I dyno tuned my car and beat the crap out of it-no problems
Then, at the track, I blip the throttle to clean out the plugs and then my damn **** puled right off-crank bolt, balancer, ATI spacer/crank pulley, belts etc.

I don't understand how this happened as my ARP crank bolt pulled out, threads were good, but it was bent.
My balancer was split at the spot where it is keyed all the way through.
The key was in good condition.
The spacer/ATI crank pulley was still in tact as one peice like it is installed.
The crank is not bent, threads are still good.

I think the keyway on the damper split under the pressure, then it was spun off the crank-backing out the bolt, and then bending the bolt as it came off. The bolt did not break.

Anybody with a LT1 and some moderate boost have some advice? I used loctite everywhere, yet this still happened. What should I do next time??? I just lost 1,000 in parts and dont want this to happen again. please help or offer your .02!!! Thanks!!
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BigBenz

iTrader: (7)

pics post pics

EPP

iTrader: (22)

I'd go with an ATI Performance Products balancer instead of the Professional Products balancer. Bob

lugnutt

iTrader: (4)

Who installed it? Was it torqued properly? Sound like it worked it way loose, the loosened the bolt!

Fire67

iTrader: (3)

Lonnies Performance... This guy will send you out a ATI balancer (underdrive or not), a special ATI balancer hub (BBC o.d. to provide more material/more strength) with or without dual keyways, and a custom machined timing cover (it accepts a larger diameter seal for the larger diameter hub).

This is how mines set-up, And Im running 13+psi with the D1SC pulleyed to almost max out the blower.

I did get the dual keyed hub, but unfortunately my motor came with only one key in the crank. So I drilled and pinned the other side

Project GatTagO

iTrader: (7)

Certainly sounds like you were let down by a fine, made in China, product. Pics.

Andrew

Fire67

iTrader: (3)

Performance Product hub says it all!

With FI, nothing is cheap for a reason. Cheap parts simply wont hold up. Buy the more expensive stronger parts the first time, cause like it or not the cheaper part will fail eventually and you'll have to buy the more expensive one later. Costing you more money in the long run.

Funkybird

iTrader: (4)

This same thing just happened to me! Does this place have a web site?

Project GatTagO

iTrader: (7)

You mean Professional Products...right?

Andrew

BawlsZ28

iTrader: (11)

Pics coming soon!!
I don't know how to post them in a thread to show up yet!

Lonnies Performance

iTrader: (16)

Look me up, I'll be glad to set you up with everything you need.

Thanks for the interest.

Fire67

iTrader: (3)

Speak of the devil and he shall show his face
Welcome to the thread Lonnie
Andrew-
You are correct, I didnt read through the thread again to confirm the name. Im lazy when it comes to that.

Lonnies Performance

iTrader: (16)

Fire67,
I believe we spoke before about a fuel system for your car.

Let me know if I can help with the balancer issue. I have done many of these LT1's & the big hub holds up well even with a single key.

Fire67

iTrader: (3)

Yeah we spoke about the fuel system and you sold me my ATI balancer/hub combo and hooked me up with specs for having my Procharger pulley spacer machined down to work with the ATI balancer. Actually, I think my engine builder bought the timing cover from you after the one he machined let go of the seal.

BawlsZ28 needs the balancer/hub combo. And probably should just get the cover as well. Other than the spacer, its a bolt on deal from there on out.