Flywheel Specs

CraZy6 · 06-01-2008, 10:53 PM

I was given a fidanza(older style) steel flywheel, but isn't sure if its a 28oz or 50oz. Here is the part number stamped on the flywheel, any help would be appreciated

RPW-163021
MEET SFI 1 1 Specification (I know what this means)
SFI NO. D065951

Then at bottom of flywheel is marked with a sharpie 10426

H0SS302 · 06-02-2008, 12:44 AM

do u have a scale at your house(to measure a persons weight)

just weigh it and then figure that in ounces

**thesource** · 06-02-2008, 09:25 AM

If the weight is pretty big , its a 50oz . If its smaller , its the 28oz .

Post a picture of the back of the flywheel .

racer99 · 06-02-2008, 11:07 AM

Quote:

Originally Posted by H0SS302

do u have a scale at your house(to measure a persons weight)

just weigh it and then figure that in ounces

WTF are you talking about?It dont work that way.

CraZy6 · 06-02-2008, 11:08 AM

Well I found the part. It was a Ford Racing 50oz flywheel not fidanza.

H0SS302 · 06-02-2008, 02:37 PM

Quote:

Originally Posted by racer99

WTF are you talking about?It dont work that way.

well whats he talking about with the ounces then?

**thesource** · 06-02-2008, 02:46 PM

Quote:

Originally Posted by H0SS302

well whats he talking about with the ounces then?

The amount of weight required to balance the crankshaft . Ford used a 28oz balancer / flywheel on 302's until 1981 and then went to a lighter crank shaft which required more weight to balance it .

351W are all 28oz balance unless you have them zero balanced .

H0SS302 · 06-02-2008, 02:49 PM

AHHHHH ok thanks. learn something new everyday. i always thought those weights ment the physical weight of the flywheel. now that i know that i feel a little stupid haha.. even with a lightweight flywheel those weights would be pretty light lol

blueink · 06-02-2008, 10:34 PM

interesting!! I have always wondered what these weights ment, as I have been looking for an OEM replacement flywheel for my 2000 GT. What specs should I look for when looking for the flywheel, and I am in no way interested in a lightened flywheel, just a stock replacement. the car has a t45 tranny

**thesource** · 06-03-2008, 11:36 AM

Quote:

Originally Posted by blueink

interesting!! I have always wondered what these weights ment, as I have been looking for an OEM replacement flywheel for my 2000 GT. What specs should I look for when looking for the flywheel, and I am in no way interested in a lightened flywheel, just a stock replacement. the car has a t45 tranny

I think the 4.6 engines are zero balanced but not 100% sure . I know they have a 6 or 8 bolt crank but think the balance was always the same . I am not a mod motor fan .

CraZy6 · 06-04-2008, 11:36 AM

PRW
PRW1630201 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 28 Oz. External Balance - PRW1630201

Its a PRW (performance racing warehouse) flywheel. I called manufacture to confirm the markings and its a 28oz flywheel. Damn I needed a 50oz.

racer99 · 06-04-2008, 01:41 PM

See next post

racer99 · 06-04-2008, 01:44 PM

Just for references sake,lots of websites do this and
it will mess you up.

They say this is nuetral(0) balance.
PRW1630200 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, Internal Balance - PRW1630200

They say this is 28 oz
PRW1630201 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 28 Oz. External Balance - PRW1630201

And they say this is a 50 oz
PRW1630202 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 50 Oz. External Balance - PRW1630202

All are the same.(50 oz balance)
I believe the one in the pic you posted is a 50 oz.

By the part number you posted but not the one in the pic
yours is a 28oz(early)balance.

06-01-2008, 10:53 PM	#1
CraZy6 Registered User Join Date: Jun 2003 Location: Corpus Christi,TX Posts: 815 Trader Rating: (0)	Flywheel Specs I was given a fidanza(older style) steel flywheel, but isn't sure if its a 28oz or 50oz. Here is the part number stamped on the flywheel, any help would be appreciated RPW-163021 MEET SFI 1 1 Specification (I know what this means) SFI NO. D065951 Then at bottom of flywheel is marked with a sharpie 10426

06-02-2008, 09:25 AM	#3
thesource LSS Sponsor Join Date: Nov 2004 Location: in a hole building transmissions Posts: 2,951 Trader Rating: (12)	If the weight is pretty big , its a 50oz . If its smaller , its the 28oz . Post a picture of the back of the flywheel . __________________ Texas Motorsports Myspace Texas Motorsports Photobucket

06-04-2008, 01:41 PM	#12
racer99 Box Foxes Rule!!! Join Date: Feb 2005 Location: San Antonio TX Posts: 1,170 Trader Rating: (1)	See next post __________________ Never underestimate the unpredictability of stupidity! 78 Zephyr, 306 turbo 82 Granada Wagon,306 150 shot 88 Mustang 2.3 turbo 100 shot Last edited by racer99; 06-04-2008 at 01:47 PM.

06-04-2008, 01:44 PM	#13
racer99 Box Foxes Rule!!! Join Date: Feb 2005 Location: San Antonio TX Posts: 1,170 Trader Rating: (1)	Just for references sake,lots of websites do this and it will mess you up. They say this is nuetral(0) balance. PRW1630200 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, Internal Balance - PRW1630200 They say this is 28 oz PRW1630201 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 28 Oz. External Balance - PRW1630201 And they say this is a 50 oz PRW1630202 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 50 Oz. External Balance - PRW1630202 All are the same.(50 oz balance) I believe the one in the pic you posted is a 50 oz. By the part number you posted but not the one in the pic yours is a 28oz(early)balance. __________________ Never underestimate the unpredictability of stupidity! 78 Zephyr, 306 turbo 82 Granada Wagon,306 150 shot 88 Mustang 2.3 turbo 100 shot Last edited by racer99; 06-04-2008 at 01:48 PM.

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06-02-2008, 11:08 AM	#5
CraZy6 Registered User Join Date: Jun 2003 Location: Corpus Christi,TX Posts: 815 Trader Rating: (0)	Well I found the part. It was a Ford Racing 50oz flywheel not fidanza.

06-02-2008, 10:34 PM	#9
blueink Registered User Join Date: Nov 2007 Location: Houston Posts: 127 Trader Rating: (1)	interesting!! I have always wondered what these weights ment, as I have been looking for an OEM replacement flywheel for my 2000 GT. What specs should I look for when looking for the flywheel, and I am in no way interested in a lightened flywheel, just a stock replacement. the car has a t45 tranny

06-04-2008, 11:36 AM	#11
CraZy6 Registered User Join Date: Jun 2003 Location: Corpus Christi,TX Posts: 815 Trader Rating: (0)	PRW PRW1630201 - PRW Billet Steel Flywheel - Ford 289-351W, 157 Tooth, 28 Oz. External Balance - PRW1630201 Its a PRW (performance racing warehouse) flywheel. I called manufacture to confirm the markings and its a 28oz flywheel. Damn I needed a 50oz.