4g64 questions...

All the oily, spinning bits

Moderators: DJpowerHaus, mattmartindrift

Post Reply
ali3baba
Knowlege Seeker
Posts: 5
Joined: Tue Jul 19, 2005 1:00 pm

Post by ali3baba »

Hopefully someone may be able to answer this...

I picked up a 4g64 block out of a '95 Mighty Max pickup. I've triple-checked the bell-housing bolts and it is 13.25"... which tells me that it is a wide-block. Interestingly, the crank is a 7 bolt... which seems contrary to what I've read for the 4g64 wideblocks (6 bolt). A friend has a '92 Mighty Max and it has the 6 bolt. Does anyone know if there was a change in the 4g64s in the Mighty Max? *edit - Never mind... I read a few threads and see that this is normal *

Also... This swap is planned for a '87 Starquest using the 87 tranny. My understanding is that the flywheel for '87 is 225(?)mm and that it is recommended to use the 240mm flywheel from the later year... which should bolt directly to a 4g64 wideblock. But that is if you have 6 bolt correct? I was planning on using a fidanza flywheel (240mm) and contacting them to see if they could take a blank and drill it for a 7 bolt... or am I wrong? Would a 240mm flywheel fit in an '87 tranny?

Thanks in advance! And expect a lot more questions as my project moves along... :)
Top
DJpowerHaus
Sir Post A Lot
Posts: 1782
Joined: Wed Apr 07, 2004 3:24 pm
Location: Baltimore, MD
Contact:
Contact DJpowerHaus

Post by DJpowerHaus »

Its not the flywheel that changes when SQers go from 225-240mm, its the pressure plate and the disk. (the SQ flywheel isnt stepped.. just one big flat surface).

As for the 7 bolt thing.. who knew!? Maybe somebody at www.mightyd50.com has some input. Seems like alot of trouble with the redrilling of a flywheel. Do you have a backup plan? You could probably use the 95's wideblock 7 bolt flywheel for the time being... no clue about pressure plate and disk stuff for it. Maybe there is something in the aftermarket for the 95 trucks... Fidanza doesnt list anything.

Bottomline: we need to find what year it went from 6-7 bolt so nobody else has to go though this trouble.
Image
Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
Top
Mike
Addict
Posts: 176
Joined: Fri Sep 03, 2004 8:50 pm
Location: Aurora, IL

Post by Mike »

Mitsubishi all went 7 bolt at the same time 92.5. I had a 7 bolt in my 93. If you look at the rebuilt engine sites, they list the flywheel and year ranges.
Top
ali3baba
Knowlege Seeker
Posts: 5
Joined: Tue Jul 19, 2005 1:00 pm

Post by ali3baba »

LOL... so I'm a newb. I was looking at the flywheels today and realized 225 and 240 was for the clutch while talking w/ a friend about it. And, of course, you confirmed it, DJ... Oh, well... I'm the dummy today! :lol:

So when people use the 4g64 wideblock (6 bolt), they can just use a flywheel from the SQs? Or can they use the original also? What differences exist between the flywheels from the SQ and 4g64 6-bolts (if any)? In looking at my friend's 4g64 6 bolt and my 7 bolt, both are flat and do not appear to be stepped (not the way I interpert "stepped")... Hence, that made me think that I could get a fidanza if I called them (or a distributor) and got a 7bolt pattern drilled in one. Could be a PITA but might be workable... if the statement rings true that 6 bolt'ers can directly bolt a SQ flywheel to their blocks.

Top
DJpowerHaus
Sir Post A Lot
Posts: 1782
Joined: Wed Apr 07, 2004 3:24 pm
Location: Baltimore, MD
Contact:
Contact DJpowerHaus

Post by DJpowerHaus »

I talked to you on IM about this, but I figured I'd post here so everybody else knows...

Yes, the 6 bolt is the same for Starions and 6bolt DSMs and 6 bolt 4G64s.

How'd the call to Fidanza go?
Image
Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
Top
slowquest
Addict
Posts: 112
Joined: Tue Jun 14, 2005 11:30 pm
Location: Cincinnati, Ohio

Post by slowquest »

Fidanza makes a flywheel for the 7 bolt, not sure if its the 225 or the 240 though. Try RoadRaceEngineering.com
Top
ali3baba
Knowlege Seeker
Posts: 5
Joined: Tue Jul 19, 2005 1:00 pm

Post by ali3baba »

<!--QuoteBegin-DJpowerHaus+Aug 6 2005, 06:02 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (DJpowerHaus @ Aug 6 2005, 06:02 PM)</td></tr><tr><td id='QUOTE'><!--QuoteEBegin-->How'd the call to Fidanza go?[/quote]
Well.... Fidanza said, "Sure, we do that... you have to buy 10 of them to make it worth it to us." Something to do with the fact that since it is CNC'd, they would have to make changes in the program to accomodate the 7 bolt pattern... which then slows the line down for them.

So, I won't be buying 1 or 10 flywheels.

<!--QuoteBegin-slowquest+Aug 6 2005, 06:07 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (slowquest @ Aug 6 2005, 06:07 PM)</td></tr><tr><td id='QUOTE'><!--QuoteEBegin--> Fidanza makes a flywheel for the 7 bolt [/quote]

They do... but I think (I don't know for sure) the problem would lie in the fact that the flywheel would be stepped and then the clutch would be different (aren't eclipses cable-actuated?)... making sure the clutch would fit the input shaft on the SQ tranny could be a problem too? Pressure plate mounting holes are different between the SQ and DSMs?

Right now, I'm going to try and find a 88-89 SQ flywheel... a friend of mine has an idea and needs to see one. Anyone have a spare one lying around?

Top
machvr4
Knowlege Seeker
Posts: 7
Joined: Tue Mar 08, 2005 8:51 pm

Post by machvr4 »

(aren't eclipses cable-actuated





The only "cables" involved with 1G T/E/L transmissions are the shifter cables. Pressure to the slave cylinder happens via hydraulics through the clutch master cylinder.


Geoff
Top
Post Reply

Return to “Swap Mechanical”