Title: 28oz HB and 50oz FW
Post by: 83TB on June 20, 2013, 07:48:03 PM
Post by: 83TB on June 20, 2013, 07:48:03 PM
I was checking casting numbers today to find the year my 351w is. The Harmonic Balancer is showing a 28oz (3bolt). The flywheel is had on there to run the 94 T-5 had numbers RF-E1ZR6380-A2A, from what I have found is a 50oz flywheel, my question is how much damage could have been caused running like this, I have not pulled a main bearing yet for inspection, but the cylinders still have some good cross hash marks.
Title: 28oz HB and 50oz FW
Post by: bodyman on June 20, 2013, 08:30:01 PM
Post by: bodyman on June 20, 2013, 08:30:01 PM
When I ran the 289 in my bird I had a 50oz flywheel rebalanced to 28oz, is it possible this was done? I tried to run the 50oz flywheel that came with the used trans, after about 30 seconds I could tell it was not going to work, pulled it back out and sent it to the machine shop.
Title: 28oz HB and 50oz FW
Post by: 83TB on June 20, 2013, 08:56:56 PM
Post by: 83TB on June 20, 2013, 08:56:56 PM
Looks like a 50oz to me!!
Title: 28oz HB and 50oz FW
Post by: Haystack on June 20, 2013, 09:26:05 PM
Post by: Haystack on June 20, 2013, 09:26:05 PM
I wonder if someone mislabeled a 5.0 flywheel for a 5.8 . external dimensions should be identical.
how loose is the bottom end of the motor?
how loose is the bottom end of the motor?
Title: 28oz HB and 50oz FW
Post by: Haystack on June 20, 2013, 09:26:26 PM
Post by: Haystack on June 20, 2013, 09:26:26 PM
I wonder if someone mislabeled a 5.0 flywheel for a 5.8 . external dimensions should be identical.
how loose is the bottom end of the motor?
how loose is the bottom end of the motor?
Title: 28oz HB and 50oz FW
Post by: bodyman on June 20, 2013, 09:43:22 PM
Post by: bodyman on June 20, 2013, 09:43:22 PM
I can't believe someone would run a car that way for very long, IIRC (it was almost 20 years ago) the vibration started to get really noticeable at 2000 rpm and just got worse from there. Like I stated above, I put it together, started it, knew it wasn't good, shut it down and tore it back apart.
Title: 28oz HB and 50oz FW
Post by: 83TB on June 20, 2013, 09:53:06 PM
Post by: 83TB on June 20, 2013, 09:53:06 PM
Quote from: Haystack;417371
I wonder if someone mislabeled a 5.0 flywheel for a 5.8 . external dimensions should be identical.
how loose is the bottom end of the motor?
bottom end seems to be fine, he pulled the 5 speed from a 94 mustang and put onto the 351w, while he had it in a ford ranger.
Title: 28oz HB and 50oz FW
Post by: 83TB on June 20, 2013, 10:43:45 PM
Post by: 83TB on June 20, 2013, 10:43:45 PM
I just got a hold of the guy who had the motor, he does remember some vibration not much, (thought it was cause of the cut down drive shaft). He drove it like that for about 3000 miles and then parked the truck. Got a newer one and one with A/C. He just put in new bearings, just had the crank polished, new rings.