Fluidampnr for L98
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Re: Fluidampnr for L98 (SHINOBI-X)
L-98 with 1 pc rear main seal crankshaft have an external balance balancer. Be aware though it is a different external than earlier chevys. It is specific to one piece seal type crank. An 85 L98 has 2 pc crank.It uses the internal style.So much for chevy being interchangeble.
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
Re: Fluidampnr for L98 (Pete K)
L-98 with 1 pc rear main seal crankshaft have an external balance balancer. Be aware though it is a different external than earlier chevys. It is specific to one piece seal type crank. An 85 L98 has 2 pc crank.It uses the internal style.So much for chevy being interchangeble.
[Modified by tpi 421 vette, 10:48 AM 2/27/2004]
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Fluidampnr for L98 (tpi 421 vette)
L-98 with 1 pc rear main seal crankshaft have an external balance balancer. Be aware though it is a different external than earlier chevys. It is specific to one piece seal type crank. An 85 L98 has 2 pc crank.It uses the internal style.So much for chevy being interchangeble.
Actually, the 1 piece seal cranks are internal balance on the front half of the crank, and external balance on the rear half of the crank. So you can use a "normal" internal balance dampner.
[Modified by tpi 421 vette, 10:48 AM 2/27/2004]
Actually, the 1 piece seal cranks are internal balance on the front half of the crank, and external balance on the rear half of the crank. So you can use a "normal" internal balance dampner.
[Modified by tpi 421 vette, 10:48 AM 2/27/2004]
Jake
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Re: Fluidampnr for L98 (JAKE)
Sorry guys , my balancer (87 oem) had a notch missing so I thought it was external.I was wrong but my wife says I am wrong alot. Wont let her see this post. Sorry for the confusion. :sad:
[Modified by Pete K, 6:18 PM 2/27/2004]
[Modified by Pete K, 6:18 PM 2/27/2004]
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Re: Fluidampnr for L98 (Pete K)
thanx guys,im a little confused but i might just build a 383 with a ex bal.400 crank to make it esier. and its a 2 piece rear so i guess it makes it real easy now.
so if i used a 1 piece rear block from a 89 vette and stock internals i'd have to .....use an internal dampner? :confused:
so if i used a 1 piece rear block from a 89 vette and stock internals i'd have to .....use an internal dampner? :confused:
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Fluidampnr for L98 (SHINOBI-X)
thanx guys,im a little confused but i might just build a 383 with a ex bal.400 crank to make it esier. and its a 2 piece rear so i guess it makes it real easy now.
so if i used a 1 piece rear block from a 89 vette and stock internals i'd have to .....use an internal dampner? :confused:
so if i used a 1 piece rear block from a 89 vette and stock internals i'd have to .....use an internal dampner? :confused:
The stock TPI engine is a hybrid. It has a neutral balance damper (no additional weight added) and a flex-plate WITH additional weight.
If you go with a 400 crank, then the engine becomes externally balanced - meaning weights will be called for on BOTH the damper and the flex-plate UNLESS
You specific to have the crank internally balanced (calling for mallory metal) inwhich case you'd use a neutrally balanced damper and flex-plate/flywheel.
Now when going with a 400 crank and maintaining the EXTERNAL BALANCING, the size of the damper becomes a concern. A 400 calls for a larger diameter damper that the 350 does and this creates a clearance problem at the lower front of the engine.
You'd need an EXTERNAL DAMPER with an OD of 6-3/4" to clear without having to modify the car for the needed clearance.
Hope this helps.
Jake
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Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Re: Fluidampnr for L98 (JAKE)
thanks JAKE,solved a little confusion in my head last night
i wanted to replace my new motors stock one with a superior one. either an ATI or a Fluid.still debating on 406 or 383.i have a 400 blk already also.so im still plannin.i want more speed so prolly the bigger brother will get chosen.
:cool:
i wanted to replace my new motors stock one with a superior one. either an ATI or a Fluid.still debating on 406 or 383.i have a 400 blk already also.so im still plannin.i want more speed so prolly the bigger brother will get chosen.
:cool:
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: Fluidampnr for L98 (SHINOBI-X)
I had my 400 crank internally balanced on the front, using a nuetral balancer
and externally balanced on the rear of the crank with a Balancing plate, stock 85 Flywheel and Centerforce clutch.....
oh yeah,, http://www.dirttrackthunder.com for a fluid damper
[Modified by ld85, 10:37 PM 2/27/2004]
and externally balanced on the rear of the crank with a Balancing plate, stock 85 Flywheel and Centerforce clutch.....
oh yeah,, http://www.dirttrackthunder.com for a fluid damper
[Modified by ld85, 10:37 PM 2/27/2004]
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Fluidampnr for L98 (ld85)
I had my 400 crank internally balanced on the front, using a nuetral balancer
and externally balanced on the rear of the crank with a Balancing plate, stock 85 Flywheel and Centerforce clutch.....
oh yeah,, http://www.dirttrackthunder.com for a fluid damper
[Modified by ld85, 10:37 PM 2/27/2004]
and externally balanced on the rear of the crank with a Balancing plate, stock 85 Flywheel and Centerforce clutch.....
oh yeah,, http://www.dirttrackthunder.com for a fluid damper
[Modified by ld85, 10:37 PM 2/27/2004]
Jake
