Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

Inline 6 into a 1985 Firebird

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Old Oct 3, 2018 | 01:21 PM
  #1  
xirxious's Avatar
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Inline 6 into a 1985 Firebird

I found an old thread about a turbo 250 H6 into a 3rd gen Firebird. The OP hasn't logged on in 3 years. I'm trying to determine if there is an existing stock engine mount that will work, or if its all custom?
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Old Oct 4, 2018 | 01:46 PM
  #2  
midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Inline 6 into a 1985 Firebird

I cant think of one no I6 ever came factory in these cars.

Do you own a random I6 you want to swap for some reason?
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Old Oct 4, 2018 | 03:11 PM
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From: Las Vegas
Car: '88 Trans Am
Engine: 5.7L TPI
Transmission: Slushbox
Axle/Gears: 3.27
Re: Inline 6 into a 1985 Firebird

I vote for a 2jz 😉
it has been done with great success
https://youtu.be/RDkZyjmtoak
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Old Oct 4, 2018 | 05:13 PM
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From: Knoxville, TN
Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: T56 swap ongoing
Axle/Gears: 2.77 9-bolt Posi
Re: Inline 6 into a 1985 Firebird

If I were going to swap a 6-cylinder into an F-body, I'd consider a 3.8 turbo Buick, and more or less replicate the Turbo Trans Ams Pontiac made back in the day.

Very strong performance, and a rather large established base, particularly because of the Regal Grand National guys. Pretty much anything partswise you'd need, you can get.

I'm not claiming it would be cheap...but done right, it would be very fast.
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Old Oct 4, 2018 | 07:34 PM
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8t2 z-chev's Avatar
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Inline 6 into a 1985 Firebird

1979 Nova or Camaro could be had with the 250 I6-i think those use same mounts as 3rd gen.Trucks used inline up through 1984.Hood clearance at front of engine might be tight on a 3G firebird
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Old Oct 9, 2018 | 11:02 AM
  #6  
xirxious's Avatar
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Re: Inline 6 into a 1985 Firebird

Midias - The Car is being built for the 24 hours of Lemons. I got it with a blown small block and didn’t want to show up with the same old sbc as everyone else. I got a 235 from a 63 Chevy II free. I also got a 250 that sat for 30 years for the pan and mounts. 92droptopws6 – I’m an idiot with electronics and am going for cheap to match the $0 budget, lol. Galaxy – Most of our drivers are new and never raced on road courses. Maybe down the road, but I’d probably turbo the inline before a V6.82t – I didn’t think about the mid 70’s, thanks! I have the mounts from a 67 Camaro, but they need work. I’m also using a TH400. I got the ACS crossmember, so that really will define where the engine sits.
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Old Oct 9, 2018 | 11:10 AM
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midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Inline 6 into a 1985 Firebird

I cant think of any reason to swap both of those turds into a thirdgen. Would be incredibly slow and being unknown and sitting probably in need of a rebuild.
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