South Central Region Board for the states of Texas, Oklahoma, and Louisana.

Progress update on TH350 swap.........

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Old May 28, 2006 | 09:08 AM
  #1  
Barry 85IROC's Avatar
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From: Houston,Texas
Car: 1985 IROC
Engine: 355 4-bolt
Transmission: Specially-Built Exner TH350
Axle/Gears: 3.73
Progress update on TH350 swap.........

Well, after one LONG DAY, TH350 is in the car, cooler installed. Left to do: finish cooling line, 2 bolts in bell housing, tighten cross-member, torque-arm bracket (one bolt), and install shifter. Found out that my clutch has been slipping constantly. 5000 miles and the clutch disc was GONE(on the flywheel side). Flywheel hammered, pressure plate marginal. Clutch simply wasn't holding. Too much torque. My fault. Didn't buy enough clutch. Will be done today (Sunday).
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Old May 28, 2006 | 09:31 AM
  #2  
Zap Racing's Avatar
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Posts: 4,079
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From: Houston Texas
Car: 1989 IROC Z-28
Engine: L98 350--modified
Transmission: 700 R4--modified
Axle/Gears: 4:10 Posi
So, I guess U don't need the external cooler I offered U?
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Old May 28, 2006 | 04:28 PM
  #3  
Zap Racing's Avatar
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From: Houston Texas
Car: 1989 IROC Z-28
Engine: L98 350--modified
Transmission: 700 R4--modified
Axle/Gears: 4:10 Posi
Sue wants to know.......does it go VROOM...VROOM yet?
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Old May 29, 2006 | 07:10 AM
  #4  
Barry 85IROC's Avatar
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Joined: Sep 2000
Posts: 156
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From: Houston,Texas
Car: 1985 IROC
Engine: 355 4-bolt
Transmission: Specially-Built Exner TH350
Axle/Gears: 3.73
The conversion kit came with a B&M cooler!(much to everyone's surprise).
And yes, it does go vrooom,vroom. Drove it home yesterday. We all know nothig ever goes as planned.(Murphy's law is alive and well). The stock T-5 bracket is not the same as a 350 bracket.Larry Dunlap was a life-saver. Came through with a B&M conversion bracket to avoid delaying the install by several days. Thanks, Larry. I gotta get taller street tires, though....................General observations so far........
MUCH FASTERNo more slipping clutch. Motor has WAY MORE POWERthan I thought.
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Old May 29, 2006 | 08:19 AM
  #5  
Zap Racing's Avatar
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Joined: Jul 2003
Posts: 4,079
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From: Houston Texas
Car: 1989 IROC Z-28
Engine: L98 350--modified
Transmission: 700 R4--modified
Axle/Gears: 4:10 Posi
Congratultions!!!

And I mean that, from the bottom of my fart!

Did the 700 shifter I gave U work, or did U have to get a real 350 shifter?

What stall TC did U end up with?

Have U made any WFO runs, all the way thru the gears?


Why do U need taller tires? U got 3.73's that should be just right for your combination--should put U thru the lights right at a little over 5000.

So, are U 100% finished or still have little things to finish up?

Last edited by Zap Racing; May 29, 2006 at 08:24 AM.
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Old May 29, 2006 | 10:49 AM
  #6  
Barry 85IROC's Avatar
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Posts: 156
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From: Houston,Texas
Car: 1985 IROC
Engine: 355 4-bolt
Transmission: Specially-Built Exner TH350
Axle/Gears: 3.73
Shifter works, 3000 stall, no WOT runs. Taller STREET tires. 4200 RM on freeway (no idea how fast I was going. new speedo not in yet. I was passing everybody.)
Thing to finish up.....removing all the clutch crap, modifying the shifter plate to allow me to put it into park, hot-wiring the neutral safety switch (so I don't have to push in the clutch to start it)Little odds and ends (back-up lights, etc.)
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Old May 29, 2006 | 04:37 PM
  #7  
Zap Racing's Avatar
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Joined: Jul 2003
Posts: 4,079
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From: Houston Texas
Car: 1989 IROC Z-28
Engine: L98 350--modified
Transmission: 700 R4--modified
Axle/Gears: 4:10 Posi
So, how long U figure before it's track ready?

I'm surprised U havn't had your foot in it yet!
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Old May 29, 2006 | 05:20 PM
  #8  
Wheel Spin's Avatar
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Joined: Nov 2004
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From: Currently:...Home: Texas City.
Car: 89 Formula 350 (x 2)
Engine: L98
Transmission: 700R4
Axle/Gears: BW 3.27
Originally Posted by Barry 85IROC
....3000 stall......
OK, so maybe I WON'T beat your 60'.....

You still want the stock 700r4 neutral safety switch I have? PM me the address info, I'll mail it to ya.
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Old May 29, 2006 | 06:45 PM
  #9  
Barry 85IROC's Avatar
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Joined: Sep 2000
Posts: 156
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From: Houston,Texas
Car: 1985 IROC
Engine: 355 4-bolt
Transmission: Specially-Built Exner TH350
Axle/Gears: 3.73
I did punch it, but the rear end just went up in smoke. On the freeway, it was awesome. I'll be ready in 4 weeks.....maybe 3. Right now, I have absolutely NO desire to even look at a wrench, let alone twist one. The starter was set up foe 15x tooth flywheel. installed 168(?) tooth flexplate, so starter had to be moved. Now, it needs to be shimmed. So, I got THAT goin' for me............ LCA brackets going on, too. Also, gotta change the thermostat. Lower temp. 160. Are we having fun yet???

Last edited by Barry 85IROC; May 29, 2006 at 07:01 PM.
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Old May 29, 2006 | 07:06 PM
  #10  
Barry 85IROC's Avatar
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Joined: Sep 2000
Posts: 156
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From: Houston,Texas
Car: 1985 IROC
Engine: 355 4-bolt
Transmission: Specially-Built Exner TH350
Axle/Gears: 3.73
Originally Posted by Wheel Spin
OK, so maybe I WON'T beat your 60'.....

You still want the stock 700r4 neutral safety switch I have? PM me the address info, I'll mail it to ya.

I don't know. You're making a lot of torque, and it's hooked!!!!!
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