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Shelter at home 67 convertible project


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37 replies to this topic

#21 Martin Cooper

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  • Year: 1967
  • Make: Pontiac
  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 11 May 2020 - 07:48 AM

A major roadblock has appeared. While the G-Force crossmember appears to be a very well made and strong piece it absolutely will not work with original exhaust system routing. There simply is not enough room around the rear of the crossmember to allow any exhaust system to tuck into the driveline tunnel above the body stiffening plate. Now I get to search for another vendor.

#22 Martin Cooper

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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 26 May 2020 - 04:39 AM

The saga continues. The second crossmember I bought will not clear the transmission pan. I've decided to use the first crossmember I bought and cut the exhaust. Then I'll have to have a shop reroute the exhaust along with cutting some of the stiffening plate.
Otherwise things are moving along and I expect to read test it soon.

#23 Martin Cooper

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  • Engine: 326
  • Transmission: Auto

Posted 14 July 2020 - 10:08 AM

Hey, we're back at it. Just after the last post I encountered a huge problem. We had the trans fully installed and attempted a test run on jackstands. The trans was pouring a steady stream of fluid from behind the torque converter and it wouldn't go in to any gear. Out came the trans and back to the vendor it went.
Next life happened and I had to go to Illinois for a family issue that ended in a funeral which was bad enough but add to that 2 weeks in hotels and over 2600 miles on the road during this COVID thing. I was happy to get back home and thankful that my masked assistant was able to accept delivery of my repaired trans while I was gone. My assistant had been on the road for business so he and I decided we should each quarantine for 14 days before we got back to work.
When we got back to work it didn't take long to get the trans back into the car. The initial test on jackstands went MUCH better. No leaks at the front of the trans and it went into reverse then drive before a cooling line hose burst. We replaced the hose and tried again with identical results. I've determined that the hose that was supposed to be designed for this purpose was in fact not good enough.
That brings me to today. I'm getting ready to install a new and different hose before a road test.

#24 Martin Cooper

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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 14 August 2020 - 01:52 PM

I might be nearing the finish line. I ended up fabricating cooling lines. If I had realized how easy it is I could have saved a lot of time and frustration.
The Shiftworks shifter conversion continued to present problems until I bought a Lokar ACA-1802 infinitely adjustable transmission shift arm. I installed it and everything seemed to fall into place. Now the Shiftworks conversion provides a very solid feel and precise control.
After reading multiple transmission suppliers installation instructions I decided that verifying fluid pressures in each transmission shifter position was cheap insurance that the transmission was assembled correctly. My pressures all came out good.
A short road test went well but there was a small fluid leak coming from the cooling lines. I tightened everything up as well as I could and drove the car about 12 miles to a shop to fit exhaust system around my crossmember and connect it to my existing system.
Tomorrow I will pick it up. Can't wait.

#25 Formula71

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Posted 19 August 2020 - 06:32 AM

Great progress Martin!!




RIP Jay - So glad to have known you

#26 Martin Cooper

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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 19 August 2020 - 10:27 AM

Thanks. The Firebird performs as I expected. The transmission shifts well in automatic mode and provides precise firm shifts in manual mode. I installed a manual switch inside my console compartment to prevent torque converter lockup when not desired. Otherwise with the Bowtie Overdrives lockup controls supplied with the conversion parts the torque converter will lockup whenever the transmission shifts into overdrive.
The only disappointment is that the differential is not as quiet as I would like.
All in all it has been a very interesting and sometimes frustrating experience. It's the type of project I have always wanted to do even if to prove to myself that it could be done. I started ordering parts on April 9 and made my final adjustments on August 15.
Now I just need to drive it and enjoy it.
A quick rundown on modifications made are as follows:
1) Stage 1 200r4 transmission and conversion kit purchased through TransDepot in Hudson, FL
2) G Force transmission crossmember.
3) 3.36 Yukon rear gear installed.
4) Auburn limited slip differential installed.
5) Shiftworks shifter conversion.
6) Custom exhaust routing (required to clear aftermarket crossmember.

#27 Martin Cooper

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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 09 September 2020 - 03:11 PM

After running some shakedown miles and subsequent adjustments everything is working right except that I have a pesky cooling line leak that I have not yet been able to correct. I will persevere.

#28 Martin Cooper

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  • Engine: 326
  • Transmission: Auto

Posted 09 September 2020 - 03:16 PM

I should add a picture of the car as it sits today.

Attached Files


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#29 ZumpTA

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Posted 09 September 2020 - 05:02 PM

She's a beauty


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#30 NOT A TA

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Posted 10 September 2020 - 07:45 AM

Great looking car Martin! The Yukon gears seem to be a bit louder than stock in my experience.


John Paige

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#31 Martin Cooper

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  • Year: 1967
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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 11 September 2020 - 05:10 AM

I had not heard that Yukon gears do not run quiet. That makes me feel somewhat better about the the setup. I was sure everything was well within spec.

#32 Injuneer

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Posted 11 September 2020 - 11:00 AM

Any more pictures..... please :D .

 

I have always admired the 67/68 cars with their simple, straightforward styling, relatively compact size, and great performance.  I bought a 1968 brand new (yes, I’m that old) for my (now ex) wife's daily driver - Aegena blue coupe w/ parchment custom knit vinyl interior,  350 2bbl, 4-speed, 3.23 Safe -T-Track, front discs, Rally II wheels.  I had a 1966 GTO at the time.  But seemed like more fun to drive the Firebird.

 

Love your ride.  Thanks for preserving a part of Pontiac history.  Great job!


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381ci all-forged stroker (Callies Stealth, Oliver billet rods, BME 2618-T61 nitrous pistons) - 10.8:1 - CNC LT4 heads/intake - Comp Cams solid roller - MoTeC M48 Pro engine management - 8 LS1 coils - 58mm TB - 74#/HR injectors - 300-shot dry nitrous - TH400 - Gear Vendors 0.78:1 O/D - Strange 12-bolt - 4.11 Pro-Street gears - AS&M headers - true duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP / 800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117 MPH straight motor
 
https://www.firebird...9_698_32777.jpg

 


#33 Martin Cooper

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  • Engine: 326
  • Transmission: Auto

Posted 11 September 2020 - 11:08 AM

Thanks for the compliments. I haven't figured out how to post pictures from my phone which is what I am on most often when viewing this site.

#34 frauhansen

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Posted 12 September 2020 - 07:34 AM

nice!!!!!



#35 Martin Cooper

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  • Engine: 326
  • Transmission: Auto

Posted 02 October 2020 - 09:08 AM

Everything seems to be working fine now and I even got my trans cooling line leak fixed. I ended up completely replacing the cooling lines. I probably should have gone that route from the beginning.

I've added some more photos, including one of my masked assistant and me at work. He was a tremendous help throughout the project.

Attached Files



#36 Martin Cooper

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  • Model: Firebird
  • Engine: 326
  • Transmission: Auto

Posted 02 October 2020 - 09:14 AM

Me and my masked assistant.
For some reason the pic of me and my masked assistant won't upload. Sorry

#37 JOE68

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Posted 02 October 2020 - 03:47 PM

looks great !!   it always helps to have another set of hands and someone to help you keep your sanity...lol



#38 Scottcm

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Posted 05 October 2020 - 03:09 AM

Looks great Martin!  I also have a2004R and love itand it also gives you a litttle better kick off the line over my TH400 I had, plus drops the RPMs about 1000 at highqway sppeds with 3:73 gears in the back.


20200627 122604 resized
20200627 122636 resized

 

 

 





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