3500 swap - Manual transmission questions (flywheel/pressure plate/clutch) (Page 2/2)
olejoedad JUL 24, 10:12 AM
Just an idea....

Could you clearance the Isuzu bellhousing with a grinder and use the 88 2.8 flywheel?
1985 Fiero GT JUL 24, 11:23 AM

quote
Originally posted by Kameirocco:


i have an 86 SE, the 3500 is from a 2011 impala (LZE? i think?)

the flywheel is the part that is REALLY tripping me up. as i now cannot find an 88 fiero flywheel that isn't externally balanced... everything i see on rockauto has weight balancing holes drilled out.


Although, this looks like what i need... not sure how i didnt find this before!

https://www.fiero.nl/forum/...040710-2-047121.html

does this look complete? if yes, i can find beretta ones real easy that look perfect (at least on rock auto)



The "weight balancing holes" are NOT the external balance, if anything it's simply balancing for the flywheel itself to get it to neutral (like every wheel, brake disc, etc needs some balancing, either by removing or adding material). The external balancing comes in the form of a large lump of metal on the engine side of the flywheel.

I am using a 3400 la1 block and rotating assembly, with the 88v6 flywheel (which is the same part number as the f23 2.2 engine flywheel), with an f23, and a spec 3+ f23 2.2 clutch and pressure plate.
jelly2m8 JUL 24, 05:41 PM

quote
Originally posted by Kameirocco:

This is where I get confused…
So if the 2.8 pressure plate rubs, what pressure plate do you use with this setup?



Rule of thumb is you use a clutch purposely designed to work with what ever transaxle / transmission, not the given engine.
jelly2m8 JUL 24, 05:48 PM

quote
Originally posted by olejoedad:

Just an idea....

Could you clearance the Isuzu bellhousing with a grinder and use the 88 2.8 flywheel?



You probably could but that would require bolting the transaxle to the engine with clutch installed, rotating it until it binds up, disassembling and looking for the point / points of contact.

I never did take the one apart I ran into this issue with, and it was many years ago, but I assume it was the rivet heads on the pressure plate just slightly making contact at some point inside. I found this out when I swapped a 2.8 into the then wives 85 2.5L 5 spd and used the 2.8L manual clutch ( I forget if I used the Muncie or Getrag clutch). I went to start it and it went KA-THUNK! rotating the engine via the crank bolt I was able to force it through it with a long ratchet a few times. Then i started it and thought Yikes! but the noise went away fairly quickly and at that point... "it's fineeeee.........."
ericjon262 JUL 24, 06:52 PM
not my circus, not my monkeys, but I think I would forgo trying to make the izuzu work and just go straight to the F23 swap. Mounts and linkages are available, there's minimal guesswork, and it's known to be strong enough, unlike the izuzu.

if this were my swap, I would probably use the stock ECU, wire it up as a 3900, and have a tuner adjust a 3900 tune for the 3500, it would be the fastest, most reliable way to make that work.

------------------
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."

I invited Lou Dias to trash me in my own thread, he refused. sorry. if he trashes your thread going after me. I tried.

pmbrunelle JUL 25, 11:52 AM

quote
Originally posted by ericjon262:
not my circus, not my monkeys, but I think I would forgo trying to make the izuzu work and just go straight to the F23 swap. Mounts and linkages are available, there's minimal guesswork, and it's known to be strong enough, unlike the izuzu.



I agree with skipping the Isuzu, if that’s not the end-goal.

However, I do not find the selection of off-the-shelf F23 mounts/linkages to be so good, so I would assume some amount of custom-fabrication / fitting / head-scratching.
ericjon262 JUL 27, 05:41 PM

quote
Originally posted by pmbrunelle:


However, I do not find the selection of off-the-shelf F23 mounts/linkages to be so good, so I would assume some amount of custom-fabrication / fitting / head-scratching.



thats a fair point.

------------------
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."

I invited Lou Dias to trash me in my own thread, he refused. sorry. if he trashes your thread going after me. I tried.