1988 flywheel in a 1987 (Page 2/2)
Gogoman OCT 08, 05:52 PM
Ok so today I got the Fiero back. It drives ok, the shop didn’t bleed the master or slave clutch cylinder so the ride off wasn’t that good. Tho ones home a bleed the system and it’s nice and solid. The engine vibrates. I can feel it inside the cab, but the idle is steady at 1500rpms and it’s a lot more responsive when i press the gas.

Maybe the time is off? Maybe the spark plugs or wiring are bad?? I’ll be checking more later at another time. Currently staying in Florida so I can’t exactly work on the car to much.
Dennis LaGrua OCT 08, 09:19 PM
You stated that that the engine was running smooth when it went to the shop now you say it's running rough after they changed the flywheel. Draw your own conclusion. As for using a Duke Flywheel on the 85-87 2.8L V6 engine. The external 4 vs 6 balance may not be the same.

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" 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 "

cartercarbaficionado OCT 09, 02:19 AM

quote
Originally posted by Dennis LaGrua:

You stated that that the engine was running smooth when it went to the shop now you say it's running rough after they changed the flywheel. Draw your own conclusion. As for using a Duke Flywheel on the 85-87 2.8L V6 engine. The external 4 vs 6 balance may not be the same.



weirdly enough the 2 I had were the same? maybe they are both v6 ones
Dennis LaGrua OCT 09, 04:49 AM

quote
Originally posted by cartercarbaficionado:

weirdly enough the 2 I had were the same? maybe they are both v6 ones


They will bolt up but the balance of these engines is dependent on how/where weight was added or deleted from the flywheel. I'd be very surprised if the Duke and 2.8L have identical balancing requirements but anything is possible.

------------------
" 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 "

[This message has been edited by Dennis LaGrua (edited 10-09-2024).]

olejoedad OCT 09, 08:20 AM

quote
Originally posted by Gogoman:

Ok so today I got the Fiero back. It drives ok, the shop didn’t bleed the master or slave clutch cylinder so the ride off wasn’t that good. Tho ones home a bleed the system and it’s nice and solid. The engine vibrates. I can feel it inside the cab, but the idle is steady at 1500rpms and it’s a lot more responsive when i press the gas.

Maybe the time is off? Maybe the spark plugs or wiring are bad?? I’ll be checking more later at another time. Currently staying in Florida so I can’t exactly work on the car to much.



I think you need to find a new shop to take your car to.
Your description of their work deserve a call to the manager of the shop and the demand for an adjustment on the bill.
BillS OCT 09, 12:35 PM
The other guys nailed it - no neutral balance flywheels in the older style engine.
If you are ever doing an engine rebuild, one thing you can do to update the car is source a 3.1 crankshaft which is neutral balance and uses the 88 style flywheel and the slight bump in displacement gives you a noticeable benefit in torque. Need the pistons too as the pin mounting points are different.
Dennis LaGrua OCT 09, 08:15 PM
No insult intended but I'll tell it to you straight. The job that you have described was done by a half ass mechanic. You won't see good engine life by having the wrong flywheel on your engine. It is really that critical. Contact Mike Valentine or Wayne Renninger, buy a good condition 85-87 V6 flywheel, have it surfaced and installed. If you buy from Wayne and are anywhere near Allentown PA he may be able to install it for you. Jeremy at TFF Auto in Alabama can also do this work but I believe that he's overloaded right now.

------------------
" 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 "

lou_dias OCT 11, 01:55 PM
Check the transmission fluid level.
Some may have leaked out during the process.
Gogoman OCT 11, 08:53 PM
Thanks for all the feedback guys really appreciate. With that being said sorry the the late response just got hit with Hurricane Milton and haven’t had the time. Well the shop definitely did a poor job with everything being said I’m still waiting on the receipt for the job. While waiting I’ve check and ajustes something things. Example adjusting TSP, Loss vacuum lines. Will keep everyone posted

fierofool OCT 11, 09:16 PM
If you determine that you need an externally balanced flywheel, I have a couple that were removed from my old engines when I upgraded to a 3.1 and a 3.4.