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3800 TPI 4spd Auto into 86 Coupe |
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Blair 
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 250 |
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 Topic: 3800 TPI 4spd Auto into 86 CoupePosted: 24 March 2007 at 4:54pm |
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I'd like to here from anybody that may have advice on this swap. |
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Capt Fiero
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Posted: 24 March 2007 at 11:34pm |
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Uhm advice. Hmm, slap a big fat turbo on it. :)
That engine looks very nice and will make a great addition to your car. I can't wait to see it up and running. Will have to take me for a boot in it when it is done. |
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 25 March 2007 at 8:00am |
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I have the tubo in the 3.8 T type Riv that I have to bring back from the Island. I think it will work good on this engine |
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Car-2-Lo
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Joined: 14 February 2007 Location: Canada Status: Offline Points: 1266 |
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Posted: 25 March 2007 at 10:31am |
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Looks very HOT, Blair! What year Buick 3800 tpi ?
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Blair
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Posted: 25 March 2007 at 5:48pm |
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The engine is from a 93 regal. It's a 3800 series 1 tpi 170hp 220 t with a thm4t60e trans. It should be an improvement over the duke tm125c combo. |
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Blair
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Posted: 29 March 2007 at 6:03pm |
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I've started designing the mounts to install engine\trans onto the cradle. With all the problems of rubber mounts and the expense of ploy mounts I'm starting to think that solid mounting is the way to go. It's the same amount of work but gives me more room for stronger mounts. The cradle mounts should dampen vibration. What are the down sides of solid mounting to the cradle? Are there drive line problems that develop from solid mounting on Fieros |
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Capt Fiero
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Posted: 29 March 2007 at 8:25pm |
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With the automatic you should be fine, its only with the standards where the shock loads are more that people start breaking trans axles.
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 01 April 2007 at 5:51pm |
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I opted to go with mounts that fit the stock Fiero setup. I used a Isuzu to locate engine mount position and made a heavy duty mount for it. Now I can reinstall the 4t60 trans and setup for the trans mounts. I couldn't handle the dirty trans so off to U-blast it when't
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Capt Fiero
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Posted: 01 April 2007 at 7:16pm |
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Dang Blair that tranny came out really nice. I might have to take my next Isuzu down and get it cleaned up the same way.
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 24 April 2007 at 6:17am |
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Here is a couple pics of the trans mounts for the 4t60-E. Look at how close the trans is to the cradle. I made the mounts fit the stock rubbers but will be going to polys.
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Blair
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Posted: 30 April 2007 at 5:44pm |
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I'm now working on the wiring harness for the 3800. I came across a cool site that I thought I would share. It's dtcc.cz28.com It has a lot of good Fiero engine swap info including pinout diagrams for ecms. If anyone knows of any other sites like this one, please post. |
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Capt Fiero
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Posted: 08 May 2007 at 6:03pm |
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Now all you need to do is get the motor in a car in 30 days.
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 08 May 2007 at 7:12pm |
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I can have it in a car by tomorrow but without axles ,fuel ,exhaust ,and power it's a long push. I am hard at work on the wiring harness. I think that this is going to take the longest. Anybody have a wiring diagram for a 93 Regal 3800 tpi ? |
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Capt Fiero
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Posted: 08 May 2007 at 11:02pm |
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I know somoene who does, I will see if I can get him to send me the files.
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 20 May 2007 at 4:45pm |
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I finished reworking the wiring harness to fit in a Fiero and reinstalled it on the engine.( Thanks to Gold Key Pontiac for unlimited access to there books and Captain Fiero for some pin diagrams.) I also finished the new front belt drive setup with AC and power steering delete. Now it's time to reinforce the cradle so it can handle the torque of the 3800 engine If there is any body looking to do an engine swap Langley Discount Used Parts LTD. has a 3800 series 2 supercharged engine with low KM for $2,000. Do you wont to go fast?
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Capt Fiero
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Posted: 25 May 2007 at 6:27pm |
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I am glad you are taking lots of pics. We are going to need to to see how you do it, so we can do a similar setup when we put a 4T40 into Lisa's V6 car.
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Blair
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Posted: 09 June 2007 at 5:35pm |
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The engine cradle is ready for the engine now. I reinforced the cross brace with a 3"x 1/8" flat bar insert.
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Blair
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Posted: 09 June 2007 at 5:37pm |
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Blair
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Posted: 09 September 2007 at 9:34am |
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3800tpi swap update. ; ; ; ; ; ; My backup car is going to Dale's and aircare next weekend and then I can pull my 85 off the road and start installing the new motor. The 3800 is as fare as I can go out of the car. The rear suspension is all rebuilt, all mounts and bushings are polyed up. While I have the car off the road it will be getting a full front end rebuild and Grand Am brake upgrade as well.
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Blair
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Posted: 01 October 2007 at 8:15pm |
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Half way done. The engine bay is painted and heat shielded. I installed the engine 30 min. ago and so far things look good.
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After haggling over price for half a year I finally got my Buick 3800 tpi home and out of it's car. I plan to install the engine and it's 4 speed auto into my 85 2m4. 
