Firstly hello - been reading this forum for a while and finally pulled my finger out and joined up.

My issue is this :

I've got a '83 Z28 in which I've installed a '93 LT1 (carb'ed) and T56 trans . . . .

Now. When I got the motor it was from a junker Firebird and the front pulley/balancer was removed during the freshen-up / install into my Camaro.

Problem is now I suspect that the pulley itself has been scrapped during a garage clear-out a few months back so is long gone !!



I know, I know, I'm a complete idiot but what are my options, here ?

Please bear in mind that I live in the U.K and trustworthy machine shops are few and far between . . . .

The only other related things to mention is that I have a Ram aluminium flywheel and clutch fitted - the rest of the bottom-end rotating assembly (rods, crank, pistons) is / are stock.

Someone suggested that I pick up a fluid dampener and that will solve my problems and avoid the need to pull the engine and trans back out but I'm sceptical.



Any info / links would be much appreciated - thanks.



BTW - If this should've gone into the other engine sub-forum as it's a non-stock install I apologise !

 

I would think you could just go to a parts store and get a balancer for a 93 Z28. Assuming your parts stores are like ours. No need to pull a motor over a balancer though.

 

From memory I recall the pulley was drilled . . . I'm assuming that's to balance out the rotating assembly ?

If it's just a case of putting any new one on that's not a problem - I'll just get a friend in S.C to send me one over . . . I just thought it wasn't that simple.

?

 

Bump.

 

Parts stores outside the US do not carry parts for US cars

 

LT1 Balancer is neutral on your engine so any stock one will bolt on.BUT it may have been drilled for fine adjustment of balance if you had the rotating assembly balanced
BE AWARE.
LT1's use two different balancers dependent apon what accessory drive is used .The Corvette with A/c on LHS uses a different balancer to the F-body one with accessories on RHS

 

That's the sort of info I need - thanks.

I'm 99% sure the motor is stock - I pulled the motor and trans from the Junker myself and there was no sign of any mods to the car at all so I'm pretty sure everything's as per "out of the factory" - except the RAM clutch and ally flywheel that is - but that itself should be externally balanced - correct ?????

Next question :-

The only accessory I'm using is the alternator as I've ditched the A/C (we just don't have the weather here !!) and I'm switching to a manual steering rack as it'll be used mainly at the strip.
I've purchased an alternator re-location bracket to mount it lower down.

I have an ally BBK reduction pulley I brought a while back (before the manual steering plan) . . . .

Assuming this pulley ITSELF is balanced - can I just use this instead of ordering another stock pulley ?

Or am I speaking out of my A**e ?

Are there better alternatives for my situation other than the stock pulley ?

Thanks again.

 

Is it for a LT1?
The balancer IS the pulley on a LT1 ,it has the ribs on outside to drive the belt;
See
http://www.summitracing.com/parts/ATI-917071/?rtype=10

There is not a seperate balancer and pulley as on earlier Chevs.If it is only a pulley ; no go.
If you have not changed anything from when you bought the engine ,you just need a stock balancer to suit a F-body LT1

 

Thanks again - no - the pulley I have is merely a pulley by the looks of it - looks like I'll have to find a replacement.

Next question(s) :

Will I need a new crank-hub if I go for a balancer like the one you linked, there ?

Secondly, as I'm running a carb and dizzy - how the hell do I make sure the hub (and balancer) are properly in relation to the front crank snout as, although there's a keyway on the crank snout (if I recall), there's no woodruff key to positively align the hub !

At this point I'm thinking that my timing marks on my balancer aren't gonna mean anything as although you can "eyeball it" as you put it on there's no way of guaranteeing it's exactly where it should be ???

This is my first LT1 build by the way . . . I'm sure it shows.

 

Get your mate in US to get one from Rockauto
www.rockauto.com
DORMAN Part # 594017
$67

Not unless it is worn and destroying the timing cover seal
But
The LT1 crank has the groove for key ; it is just not used
Some fit a keyed LT1 hub to prevent drive system spinning in big HP apps
http://www.thunderracing.com/shop-by...ankshaft-Hubs/
Maybe you should buy this one (cheap ) ?
http://www.ls1tech.com/forums/parts-...92-95-lt1.html

How do you set your timing now?
What have you got for a timing mark?
Only way to do it without taking the head off would be to put a piston stop
http://www.summitracing.com/parts/CCA-4795/?rtype=10
in #1 cyl and rotate engine either way against the stop until you determine actual TDC #1 .
The replacement balancer is not going to have a timing mark so you would mark balancer once it was installed with engine at TDC.
Benefit of keyed balancer is you would only have to do it once ; the balancer is going to go back on in correct position anytime you take it off in future

You might get more info over on
https://www.thirdgen.org/forums/ltx-lsx/

 

Yep, already had the RockAuto pulley in favourites as a back-up.

The keyed hub was the way I was thinking of going, hence I was looking at the one the guy on LS1Tech is selling on Jegs earlier this morning.
Obviously the stock replacement is the far cheaper option, though . . .

At this stage I haven't set the timing - the motor hasn't run since I removed it but I'm aiming for a August fire-up depending on a (hopefully) final shipment from the U.S very soon (hence need to get this issue sorted.

The simplist solution I see is to get a keyed hub like :

http://www.jegs.com/i/JEGS/555/51607...oductId=757291

Then get an appropriate balancer, complete with timing marks like :

http://www.jegs.com/i/JEGS/555/51606...oductId=757291

Although from the pictures it doesn't actually look like there's timing marks on that - dispite saying so in the description . . . ???

So maybe something like :

http://www.summitracing.com/parts/PFS-80030/

(The ATI one you posted is ideal but I'm just being cheap with the one above !)

Then this would also probably be very handy too :

http://www.jegs.com/p/Comp-Cams/Comp...90667/10002/-1

Does the above seem like the best option ?

Obviously throwing a stock balancer back on would be the cheapest way forward but it won't help with my up-coming timing issues . . .

 

. . . . Then there's no timing tab on the timing chain cover so that's another thing I'll have to get around . . . .