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| 500 Cubic Inch Cadillac Fiero (Page 2/2) |
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IMSA GT
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JAN 17, 06:41 PM
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| quote | Originally posted by 82-T/A [At Work]:
Weird how back in the day, there were so many people getting banned in the Tech section. There seems to be this "one guy" consistent in all of those threads, Shawn. I know nothing about him, but I keep seeing his name pop up in every thread where someone is banned, and there's always a fight it seems. |
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Shawn loved this place 
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Raydar
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JAN 18, 01:50 PM
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| quote | Originally posted by 82-T/A [At Work]:
...
There seems to be this "one guy" consistent in all of those threads, Shawn.
I know nothing about him, but I keep seeing his name pop up in every thread where someone is banned, and there's always a fight it seems.
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| quote | Originally posted by IMSA GT:
Shawn loved this place
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I think y'all are both thinking about a different Shawn. Errr... Shaun.
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Additivewalnut
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JAN 18, 11:24 PM
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I could probably dig around and find out myself but I gotta ask, how does it get power to the wheels in that orientation? Is the differential under the oil pan or something? How does the transmission even fit? I see these in the fiero car show videos that FieroAustin posts and I'm always confused on how it even works!
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82-T/A [At Work]
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JAN 19, 07:52 AM
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| quote | Originally posted by Additivewalnut:
I could probably dig around and find out myself but I gotta ask, how does it get power to the wheels in that orientation? Is the differential under the oil pan or something? How does the transmission even fit? I see these in the fiero car show videos that FieroAustin posts and I'm always confused on how it even works! |
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It uses a special kind of transmission that's no longer made, it's called the Turbo-Hydromatic 425... .Th425 for short. They also had a TH325 which was a lesser version. They were the front wheel drive versions of the Th-400 and Th-350 respectively ....
Th400 = Th425
Th350 = Th325
The Th425 was found in cars like the Cadillac Eldorado and the Oldsmobile Toronado.
The Th325 was found in the same cars, but in the later years... 1978+
The 425 essentially became the 325, though they are slightly different transmissions. When Cadillac and Oldsmobile transitioned from huge big block motors to small block V8s (metaphorically speaking) from the mid 70s to the late 70s, they switched to the lesser version.
https://en.wikipedia.org/wiki/Turbo-Hydramatic_425
There was also something called a "Switch Pitch" version of these, which is super rare, and really, really cool... it basically allowed you to change the stall speed of the torque converter on-command. It allowed you to alternate between a stall speed of about ~1,000 rpms. Lower stall speed for normal driving, and higher stall speed for performance driving. it would essentially be a little switch that mounted under the gas pedal... so when you'd floor it, the gas pedal would push down on the switch and give you a higher stall speed, allowing the motor to rev up before the torque converted engaged... giving you a nice launch.
https://www.jalopyjournal.c...switch-pitch.674586/
EDIT: I don't know who's car this is... but they used a Th-425 to build a replica Lamborghini Diablo from a Fiero:
https://www.flickr.com/phot...7076/in/photostream/
Click the right button to go to the next image. I start actually thinking it might be a real Diablo, until the shots where I see the good ole-fashioned GM steering column.[This message has been edited by 82-T/A [At Work] (edited 01-19-2024).]
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Additivewalnut
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JAN 19, 04:13 PM
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| quote | Originally posted by 82-T/A [At Work]:
There was also something called a "Switch Pitch" version of these, which is super rare, and really, really cool... it basically allowed you to change the stall speed of the torque converter on-command. It allowed you to alternate between a stall speed of about ~1,000 rpms. Lower stall speed for normal driving, and higher stall speed for performance driving. it would essentially be a little switch that mounted under the gas pedal... so when you'd floor it, the gas pedal would push down on the switch and give you a higher stall speed, allowing the motor to rev up before the torque converted engaged... giving you a nice launch.
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That's so cool!! I love learning about the oddball stuff that came out of the 60s and 70s. That whole transmission is super neat too, I'm amazed they got all that into such a small package given the era.
That's also really cool but you have to wonder if by the time he was done with it, if it would've been cheaper and easier to just get an actual Diablo
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