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11-16-2007, 11:03 PM
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Registered User
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Join Date: May 2004
Location: Sydney, Australia
Posts: 90
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So let me get something straight.
I have a damaged 3 litre flywheel at the moment which I can not use. How could I adapt my 2.5 litre flywheel to fit my 3 litre 12v engine in my racecar? Obviously I want my starter motor to work too.
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Forza Napoli - Ti seguiro ovunque!!!
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11-17-2007, 02:18 AM
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Registered User
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Join Date: Dec 2003
Location: VB, VA
Posts: 7,397
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 Quote:
Originally Posted by Barbalatte
So let me get something straight.
I have a damaged 3 litre flywheel at the moment which I can not use. How could I adapt my 2.5 litre flywheel to fit my 3 litre 12v engine in my racecar? Obviously I want my starter motor to work too.
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See if these help: 164 3.0 into a Milano Swap
AlfaGTV6.com ~ Home of the Alfa Romeo Transaxle
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Ciao, Alfisto Steve
Virginia Beach, VA
AROC 164 Tech Advisor
sdpatchin@aroc-usa.org
http://www.aroc-usa.org/tech/index.asp
http://www.aroc-usa.org/
Daily drivers: USA models 91 Bianco 164B 5-speed ALFA 4ME, 91 Argento aka "Quik Silver" 164B ALFA 4US w/AT, 93 Rosso 164L 5-speed - semi-daily driver with issues.
164L Rescue projects: 91 Argento aka Non-QS, and organ donor 91 Nero 164L
"A day without an Alfa whine is like a day without sunshine"
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11-17-2007, 03:27 AM
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Join Date: Mar 2006
Location: Melbourne, Australia
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This has come up before with a mix of responses. Personally I don't believe every 2.5 has an individual balance factor. It's so impractical to assemble crank, flywheel and front pulley, balance, dissassemble then re-asssemble those same parts into a block another half a dozen steps down the production line. On a Ferrari or Lamborghini no doubt, but I can't see it on a mass production Alfa. As JJ's posted before, balancing holes drilled at the factory looked different between a pair of 2.5 front pulleys photographed. From this it was concluded that every motor had a different balance. Another way of explaining it is differences in the castings. This theory was suggested in the 1st link below.
2.5 and 3.0 should have different balance factors but Jes and others have mixed and matched components with good results.
Here are a few threads on this topic. The 2nd thread is one I started about a jig I used after lightening but could be used to turn a 2.5 flywheel into a 3.0 for your conversion.
ALFAGTV6.COM ~ View topic - Front flywheel balancing
Flywheel balancing jig
60 Minus 2 Pulley for GTV-6
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11-17-2007, 05:24 AM
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Join Date: Nov 2003
Location: Southern California
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Quote:
Originally Posted by Alfisto Steve
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 Although, I know of more cases of the same.
Jes
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87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeating what I suggest or do is at your own risk - be critical)
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11-18-2007, 03:23 PM
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Join Date: May 2004
Location: Sydney, Australia
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Thanks for the responses boys.
Just to note the 3.0L is from a Milano and my 2.5L is from my GTV6. I am dropping the 3.0L into my GTV6. I stress, the 3.0L is not from a 164. Should the 2.5L flywheel just bolt straight on??
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Forza Napoli - Ti seguiro ovunque!!!
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11-25-2007, 02:21 PM
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I can tell you one thing. They look very different! Diff. sizes etc...
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Forza Napoli - Ti seguiro ovunque!!!
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11-26-2007, 09:06 AM
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Richard Jemison
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Join Date: Apr 2005
Location: Pensacola, Fl. U.S.A.
Posts: 798
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Verde 3.0 flywheel
Pics are below, I don`t have a late (87-88) 2.5 to compare it to for you. The GTV6 and pre 87 Milano`s are totally different!
No. E 195 46 02 400
Crank Boss is raised 13mm (.512) from base
Moulded counterweight measured bottom tip to other bottom tip is 186MM
(7.325)
Counterweight height is 6.02 mm (.237) higher than the recess around the rest of the flywheel
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Richard Jemison
RJR Racing
http://scuderiagiallo.com
"you don`t have to listen, but you won`t win the argument"!
"Nothing that I might suggest will be legal in California"
Last edited by Alfar7; 11-26-2007 at 06:57 PM.
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12-17-2007, 01:20 AM
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Location: Granolaville, Washington
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Quote:
Originally Posted by Alfar7
Pics are below, I don`t have a late (87-88) 2.5 to compare it to for you. The GTV6 and pre 87 Milano`s are totally different!
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I'll try using Richard's terminology ("the molded counterweight measured bottom tip to other bottom tip") and try to extrapolate measurements between the two sets of pictures. Unfortunately I already measured top tip to top tip (and we positioned the flywheels in our respective pictures clocked opposite by 180 degrees to make matters worse), so I will call it inner-tips versus outer-tips to be clear...
Looking at the wheels flipped from another angle, the one on the left (said to be a 3.0), measures about 153mm from inner tip to inner tip and the one the right is only about 128mm (a known 2.5) - again - measuring the inner-tips (top tips in Richard's pictures, bottom tips in my pictures...)
Looking at the scale in Richard's pics, that flywheel appears to be about 6 inches (or roughly 153mm at the "inner" tips of his as well), just like the one on the left in my pics (which is the one that I suspect is a 3.0) - this jibes with what Richard is saying although, the 2.5 flywheel on the right in my pictures HAS the raised crank-plane (like we know the later Milano flywheels to have) but it has a different cut-out (only about 128mm measured from the inner-tip to inner tip...)
What did I miss...?
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'87 Milano 3.7 Litre V6 156 Series 24 Valve - "Ducati Dark"
'88 Milano Verde - GoTech (24 Valve REAL Soon Now!) - Black
'95 164 LS - 6-Speed 3.45 L 24V w/UniChip - Burgundy
'94 164 LS Auto - Baby Seat!  - Bronze
'84 GTV6 (24 Valve & GoTech Soon!) - Silver
'74 GTV Twin Spark w/ITBs & GoTech - Red
Last edited by junglejustice; 12-21-2007 at 10:15 AM.
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12-17-2007, 11:38 AM
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Join Date: Jul 2005
Location: Oslo, Norway
Posts: 459
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There must be a balance difference between the 2.5 and 3L flywheels because the crankshaft has a longer throw on the 3L than the 2.5L. That the same flywheel has been used on 2.5 and 3L is not correct, cannot be. In the september 1988 the factory spare part list there is listed two different numbers for the 2.5 and 3L flywheels: they are not the same!
Hopefully somebody(JJ?) can find flywheels with these numbers and compare physically and even checking balance in a balancing machine.
Factory spare part number of september 1988
3L flywheel : 19546 02040 00 00
2.5L flywheel: 19555 02040 00 00
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12-18-2007, 03:51 PM
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Richard Jemison
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Join Date: Apr 2005
Location: Pensacola, Fl. U.S.A.
Posts: 798
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3.0 flywheel
Quote:
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So, that's a 3.0 in your pics?
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Your two flywheels however, don`t appear to be the tall flange.
They have the part no.s on the other side.
What are you trying now?
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Richard Jemison
RJR Racing
http://scuderiagiallo.com
"you don`t have to listen, but you won`t win the argument"!
"Nothing that I might suggest will be legal in California"
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12-18-2007, 04:23 PM
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Location: Granolaville, Washington
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Quote:
Originally Posted by Alfar7
Your two flywheels however, don`t appear to be the tall flange. What are you trying now? |
 You must have a screw loose...! That, or you partake in heavy drink - early in the day?
BOTH of these flywheels have the raised crank-mounting sections, but one is from a known 2.5 Milano and the other is supposed to be a 3.0 - don't know.
That is what I am trying to determine (if you will just get off of your narcissistic, ****ing sarcastic high-horse for one moment...) 
__________________
'87 Milano 3.7 Litre V6 156 Series 24 Valve - "Ducati Dark"
'88 Milano Verde - GoTech (24 Valve REAL Soon Now!) - Black
'95 164 LS - 6-Speed 3.45 L 24V w/UniChip - Burgundy
'94 164 LS Auto - Baby Seat! - Bronze
'84 GTV6 (24 Valve & GoTech Soon!) - Silver
'74 GTV Twin Spark w/ITBs & GoTech - Red
Last edited by junglejustice; 12-18-2007 at 04:27 PM.
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12-18-2007, 04:34 PM
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Richard Jemison
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Join Date: Apr 2005
Location: Pensacola, Fl. U.S.A.
Posts: 798
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Flywheels
Quote:
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BOTH of these flywheels have the raised crank-mounting sections, but one is from a known 2.5 Milano and the other is supposed to be a 3.0 - don't know.
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What...
You can`t read the #`s off them???
Or are they secret flywheel numbers......
Like your cam specifications
Hmmm.....................
__________________
Richard Jemison
RJR Racing
http://scuderiagiallo.com
"you don`t have to listen, but you won`t win the argument"!
"Nothing that I might suggest will be legal in California"
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12-18-2007, 08:53 PM
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Location: Granolaville, Washington
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You're such a DORK Richard!
Quote:
Originally Posted by junglejustice
I finally had a chance to take a shot of a "suspected 3.0" and a known 2.5 Milano that I have here...
Unfortunately I already measured top tip to top tip (and we positioned the flywheels in our respective pictures clocked opposite by 180 degrees to make matters worse)...
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I had not been back to the shop to re-measure or take more pics or record the numbers yet either. Why do I bother with you!?
You know what Richard - I think the guys are right. I am just going to place you on my ignore list. Feel free to play the role of the self-styled vigilante who has to protect the poor mindless, helpless victims of the BB. You're delusional. I shall ignore you from now on.
__________________
'87 Milano 3.7 Litre V6 156 Series 24 Valve - "Ducati Dark"
'88 Milano Verde - GoTech (24 Valve REAL Soon Now!) - Black
'95 164 LS - 6-Speed 3.45 L 24V w/UniChip - Burgundy
'94 164 LS Auto - Baby Seat! - Bronze
'84 GTV6 (24 Valve & GoTech Soon!) - Silver
'74 GTV Twin Spark w/ITBs & GoTech - Red
Last edited by junglejustice; 12-18-2007 at 09:01 PM.
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12-19-2007, 07:14 AM
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Richard Jemison
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Join Date: Apr 2005
Location: Pensacola, Fl. U.S.A.
Posts: 798
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Flywheels
Quote:
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I shall ignore you from now on.
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My bucks are on your attemp to show two old flywheels, just to throw the seed of doubt on my posting. Otherwise why not post pics of #s? If you can stay up all night to post your infomercial ****, wipe off the ****ing #s and post the pic of them! My flywheel had the correct number on it...........but yet you post a question to it being a 3.0 flywheel.
You are such a devious ****head!
Mean Old Bastard
__________________
Richard Jemison
RJR Racing
http://scuderiagiallo.com
"you don`t have to listen, but you won`t win the argument"!
"Nothing that I might suggest will be legal in California"
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