Been looking at engine swaps for fun, seems like everyone drops in a 3800, but the sound of a 3.4 DOHC IS SWEET! Just wondering what work and other things have to be done besides engine swap for a 3.4 on a 4 speed stock 86 2M6 notchie?
Custom front engine mount Dog bone and mount Exhaust Coolant plumbing Power steering delete Wiring harness 88 (or balanced) flywheel New fuel pump ECM, flash of ECM chip to new program Throttle cable AC hookup to compressor/hoses
Probably replace the clutch and TO bearing as well while it's all apart.
------------------ Anything I might say is probably worth what you paid for it, so treat it accordingly!
I believe that the 3.4LTDC flywheel and Fiero clutch will work as is, but you may need a HD clutch.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
I believe that the 3.4LTDC flywheel and Fiero clutch will work as is, but you may need a HD clutch.
The 3.4 flywheel may work, but it's a little heavier than the Fierpo 2.8 flywheel, so use the Fiero 2.8 flywheel. However, the clutch that went with the 3.4 is for the Getrag 284 transmission and has a *PULL*-to-release pressure plate. It will not work with the Fiero Getrag 282.
[This message has been edited by Will (edited 11-25-2019).]
The 3.4 flywheel may work, but it's a little heavier than the Fierpo 2.8 flywheel, so use the Fiero 2.8 flywheel. However, the clutch that went with the 3.4 is for the Getrag 284 transmission and has a *PULL*-to-release pressure plate. It will not work with the Fiero Getrag 282.
That might be the best choice but I believe that the 88 Fiero neutrally balanced flywheels may no longer be available.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
Custom front engine mount Dog bone and mount Exhaust Coolant plumbing Power steering delete Wiring harness 88 (or balanced) flywheel New fuel pump ECM, flash of ECM chip to new program Throttle cable AC hookup to compressor/hoses
Probably replace the clutch and TO bearing as well while it's all apart.
Would the ECM from the donor car not work as is? Am new to all this computer swapping/programming way of tuning. I am considering this swap for my 84 2.5/auto, with the 3.4 and an OD auto in the future.
