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DRR Pro
Picture of 68TSCAMARO
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pass on jw . meziere / big dawg done
 
Posts: 830 | Location: middle georgia | Registered: July 20, 2003Reply With QuoteReport This Post
DRR Pro
Picture of jmarkaudio
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quote:
Originally posted by SCDIV1:
139 tooth JW or ATI

You would have to change the starter drive too but you have a far stronger setup and even if your engine kicks back, you won’t break a tooth off the flex plate.

I had a JW and had it re-certified once. It expired again so it was 6 years old and I just put an ATI on a fresh engine.

It’s a much larger tooth design and way stronger.

The cheap flex plates no matter who’s name is on them are probably offshore made. Not very good quality.


This. We switched to the 139 tooth on our stuff, very solid. JW 139 tooth Wheel and Starter of your choice.




Mark Whitener
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Posts: 1005 | Location: Florida | Registered: November 16, 2007Reply With QuoteReport This Post
DRR S/Pro
Picture of SCDIV1
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JW makes a "wheel" with holes like a std flexplate, they call it their lightweight version...

I used that and don't use the solid version...

ATI's also has holes....

I had more issues with burnt thrust bearings going back many years ago when using a JW Solid Wheel.....

For that reason alone I refuse to use one....

Never had a thrust burn up using the wheels with holes....


In the past I never used a chip on the starting line for Pro Tree racing and I've done a lot of it....S/ST, S/G and S/C

That may have contributed to the rash of burnt thrusts I had in more than one car with more than one engine....

I think it happened to me about 3 times and was very annoying......Last time I just slid a new rear main bearing in there and let it go....had probably .020"-.030" thrust....stayed like that for quite a while with no problems

Magically stopped and only change was NO SOLID FLEXPLATE...

I don't argue with results or facts.....lol
 
Posts: 1598 | Location: Where ever I am, I'm here and it's me | Registered: March 15, 2007Reply With QuoteReport This Post
DRR Sportsman
Picture of TD3550
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^^^ Man that is strange. Do you think it was a balance issue or a harmonics issue? How bad was the thrust? Maybe because of the weight of the solid piece??? OR a balance issue with the plate it's self?
 
Posts: 636 | Location: Under a Truck | Registered: August 23, 2013Reply With QuoteReport This Post
DRR Sportsman
Picture of 57 Vette
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Years ago while visiting ATI in Baltimore.I had a discussion with Jim Beattie about this very same thing.Jim said that the flex plate holes were there to dampen drive line harmonics. And if they were solid like some of them are on the market,they would cause all sorts of strange things.

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Posts: 242 | Location: Toronto Ont/Surprise AZ | Registered: August 18, 2003Reply With QuoteReport This Post
DRR Top Comp
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^^^^^ I agree with this!

My transmission guy claims that automatic transmissions were designed to have a flexplate, not a flywheel. Currently running a TCI with zero problems.


Clowns to the left of me, Jokers to the right. Here I am.......
 
Posts: 4638 | Location: stuck in the middle with you! | Registered: March 11, 2002Reply With QuoteReport This Post
DRR Trophy
Picture of SuperPro54
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That is interesting. I have always used the JW Wheel on my small blocks. I have never had an issue.


Matt Sommers

www.kmhotrods.com
 
Posts: 73 | Location: Brooksville FL  | Registered: September 08, 2006Reply With QuoteReport This Post



DRR Trophy
Picture of 1leg
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The solid JW flexplate will flex, The Meziere HD ProMod Flexplate will flex. Meziere makes a near solid version for the Baja 1000 race teams guess what they also flex.

I have tried to find a video that went around that showed how much a flexplate flexed when in the car running but have not been able to find it. I should make one some day.


Meziere Tech.
Make sure your water pump is on whenever you check your coolant level.
 
Posts: 76 | Location: Escondido | Registered: July 01, 2011Reply With QuoteReport This Post
DRR S/Pro
Picture of SCDIV1
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I don't know the answer and read a lot of articles and watched videos about what causes the trust bearing issue.

Saw guys film the converter and flexplate with engine running and going to the wood.

Turbo 400's were notorious for burning up BB Chevy trusts in trucks for a while and there was some sort of cooler issue or something like that.

I know for sure Beattie said that about a solid wheel but many racers used them with no problem.....

I even used mine a lot with no problem......and just had a streak of it happening and as I said it was in 2 cars with at least 2 engines and trans and converters....

I used to grab a screwdriver regularly and check the thrust by prying forward and backward on the balancer and back of crank crossing my fingers !


I drilled a direct oil feed hole from the rear main oil passage to the back of the thrust and a hole in the bearing and created a direct oil flow path on almost every BB I built....made zero difference when I had the issue going on...


Only thing that I stopped using was a solid wheel. I'm pretty sure I still have one buried under a bench somewhere.....Might even be an old externa balance unit and probably is....

A discussion about the problem used to be right on here (DRR) going way back and some real good info got thrown around by smart trans guys but no real absolute answer as to what causes it....

It used to always get blamed on converters pushing forward but the best answer for that one I recall was if it could wreck a thrust why does it not show damage inside the pump.....

Trust bearing is torched or maybe just worn without torching the rear main surface, pump and converter are spotless.....??? How does that happen.....I don't know is all I got....
 
Posts: 1598 | Location: Where ever I am, I'm here and it's me | Registered: March 15, 2007Reply With QuoteReport This Post
DRR Pro
Picture of BarneyB
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I find it funny (or I’ve had years of luck) but I’ve been running the JW the wheel for well over 15 years. I do replace it when the cert expires because I mainly race NHRA divisional and nationals. I have never had any of the problems I read on here.


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Posts: 2349 | Location: Wadsworth, Ohio | Registered: December 12, 2001Reply With QuoteReport This Post
DRR S/Pro
Picture of SCDIV1
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I'm just happy I have had no repeat episodes for a long time with any engine in any car.
 
Posts: 1598 | Location: Where ever I am, I'm here and it's me | Registered: March 15, 2007Reply With QuoteReport This Post
DRR Sportsman
Picture of BD104X
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quote:
Originally posted by BarneyB:
I find it funny (or I’ve had years of luck) but I’ve been running the JW the wheel for well over 15 years. I do replace it when the cert expires because I mainly race NHRA divisional and nationals. I have never had any of the problems I read on here.

I have been running a 555 or bigger motor on injected alcohol for 15+ years with a regular starter & flexplate for years and never had an issue, but then once last year I wnt to start my car and pull it in the trailer & I guess I didn't get the "rhythm" exactly right and it kicked back and knocked a tooth off the flywheel. I chalked it up to bad luck and put another ordinary TCI flexplate on and its been fine.


Billy Duhs - BD104X@gmail.com
 
Posts: 361 | Location: New Jersey | Registered: February 26, 2000Reply With QuoteReport This Post
DRR Trophy
Picture of 1leg
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I believe in most cases with thrust bearing damage is due to improper transmission pump pressure or converter engagement.
We had a issue on a engine back in the late 80s on a small block, went through 3 thrust bearings before we just swapped out to a different powerglide and converter. Back then we didn't know too much about trans pressures and converter set ups so we never got a good answer on the cause. The case was tossed for another and the converter went in for a rebuild. Never had a issue again.


Meziere Tech.
Make sure your water pump is on whenever you check your coolant level.
 
Posts: 76 | Location: Escondido | Registered: July 01, 2011Reply With QuoteReport This Post
DRR Elite
Picture of 1320racer
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Been using ATI flex plates for decades, none better.



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Posts: 6022 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post



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