4A Crank Q's

[DeftAnesthetik]

aside from the obvious strength problems, can a standard 4A-c crank be fitted to any other 4A block? I ask because i am dropping a 20Valve in an older tercel and the flywheel will not fit my transmission, i have tried to get the flywheel from the 3a reindexed but the incompetence of local machine shops have me looking for another solution. from what i understand the 4A-C has a 6 bolt pattern on the crank as opposed to the standard 8 bolt on all other 4A's. this is not going to be a racecar and i will more than likely be crippling the engine so it does not tear the car apart. just doing what i can to become familiar with the "A" series engine for a future project. (i'll let everone know when the time comes) . all my research tells me this is entirely possible, just need some confirmation before i start tearing.

thanks in advance

[Hypo]

Could you not run a 4age flywheel from a 86 kw engine?

I ran a 3a 4 speed gearbox on a 4age.

[Rallystanza]

I would have thought that you can use the 86kW 4AGE flywheel also in your bellhousing?

When you do a 4AGE conversion in an AE86 for instance, the 8 bolt 4AGE flyhweel gets used in this instance.

So is it purely a case of the 4AGE flywheel not fitting in the bellhousing or the 20 valve flywheel not fitting? The 20V flywheel is larger.

Have you tried the above suggestion?

[DeftAnesthetik]

20v flywheel is too large for the bellhousing, i have called around to find the standard(if there is a standard) 4ag flywheel and all the measurements i have gotten made me believe that they are the same size. I have been trying to search on the net to find actuall size specs but all i get are either 200mm or 212mm clutch specs which do not tell me the actual outer diameter of the flywheel. the one i have (which came with the 20v) is 267mm which is about 5mm too big even though i have ground as much of the bell housing as i feel comfortable with. can anyone tell me the actual outer diameter of the various flywheels? the 3A has a 250mm one and i could possible accept upto a 260mm but no bigger.

[rick q]

I've got a billet flywheel on my desk which measures 271mm across the tops of the ring gear teeth - it suits the 200mm clutch, but will fit either smallport or bigport. Don't know whether it'll fit the 20V.

[Hypo]

20v flywheel is too large for the bellhousing, i have called around to find the standard(if there is a standard) 4ag flywheel and all the measurements i have gotten made me believe that they are the same size. I have been trying to search on the net to find actuall size specs but all i get are either 200mm or 212mm clutch specs which do not tell me the actual outer diameter of the flywheel. the one i have (which came with the 20v) is 267mm which is about 5mm too big even though i have ground as much of the bell housing as i feel comfortable with. can anyone tell me the actual outer diameter of the various flywheels? the 3A has a 250mm one and i could possible accept upto a 260mm but no bigger.

Go and look at this page should have everything you need.

http://www.club4ag.com/faq%20and%20t...0Analysis.html

3/4 of the way down.

[DeftAnesthetik]

I've got a billet flywheel on my desk which measures 271mm across the tops of the ring gear teeth - it suits the 200mm clutch, but will fit either smallport or bigport. Don't know whether it'll fit the 20V.

that flywheel may be larger than the one i already have. (but we could be measuring differently)

Go and look at this page should have everything you need.

http://www.club4ag.com/faq%20and%20t...0Analysis.html

3/4 of the way down.

yes, i have this one in my bookmarks. it does give you the various p/n#'s but no actual outer diameters. it does state though that all the ring gears are the same, making me believe that all the flywheels are the same size. bringing me back to the question will a 4ac crank go into a 20v? i know the 4ac crank has a 6 bolt pattern which will match up with my original flywheel. i may have to get creative with some conrods.... this is what i need to know.

[Hypo]

I can tell you that a 3a gearbox goes on a 4age 86kw engine with a factory clutch.

A 20val flywheel is bigger then a 86 kw flywheel.

Why not buy a 86 kw flywheel and bolt it on. Then you don't have to change cranks. If this doesnt work you have lost what $20 dollars and if itd oes work you have saved heaps of time.

Needs to be 86,.87,88 Corolla one as some of the MR2 ones are 212 mm.

[Lachie]

You could always get a custom flywheel, or get the centre of yours cut out, then get the centre of an eight bolt flywheel cut out and machined to a press fit for the hole left in your old flywheel.

Sounds like alot of screwing around to me though, try the 86KW like people have suggested. I'd steer well clear of the 4AC crank...