351W Flexplate

[JWMcCrary]

Can somebody confirm this is the correct flexplate for 351w and C4, tooth count is what I'm not remembering, but thinking this should be it.

https://www.summitracing.com/parts/sum-g111sfi?rrec=true

 

[Rangerbj]

Isn't the weight also important to know?

I upgraded an engine from old 302 to new crate 302 and I had to go from 28 oz to a heavier flexplate.

Just saying

 

[DirtDonk]

It's the correct imbalance (28oz for 351w always) and tooth count (164t is the larger V8 truck type) but I don't know about the offset.
Maybe someone else can confirm then, but at least the first two parameters are correct.

Paul

 

[thegreatjustino]

Isn't the weight also important to know?

I upgraded an engine from old 302 to new crate 302 and I had to go from 28 oz to a heavier flexplate.

Just saying

All 351s are 28oz imbalance from the factory regardless of year. The 50oz change over only applied to the 302/5.0

 

[JWMcCrary]

The one I have is a 50oz that was behind a stroker 351w that was balanced 50oz, going back with all 28oz assembly so need a new flex plate. I guess I can take the one I have in to summit and get them to match it up and make sure the one in the link is the correct one.

 

[Jfryjfry]

This is the one we got for our 351w when I installed a c4 transmission. Also, get a new mini starter - great improvement.

Flexplate, 164-Tooth, External Engine Balance, 28 oz. Imbalance, SFI 29.1, Ford, Small Block, Each
(Mfr. #: SUM-G111SFI)

 

[JWMcCrary]

Already have a mini starter, been using for years. Thanks for the info

 

[EricLar80]

My builder ended up using a 50oz flexplate rather than 28oz so that I didn't have to use Mallory metal to get the rotating assembly balanced. Not sure if that is the 'right' way, but seemed to work ok.

 

[hucklburry rev2]

Can someone confirm info on the torque converter bolt pattern in the Bronco that it will fit a newer flex plate? I haven't paid enough attention, is the bronco TC bolt pattern smaller than most? I could be wrong....

 

[Broncobowsher]

The Bronco used 2 different bolt circles over the years. Viperwolf will probably correct me on this.
'73 was the large bolt circle 11.4"
'74-76(?) used the unicorn small bolt circle (10.5") with an extended snout.
'77 went back to the large bolt circle

And that Summit flexplate looks correct. I see reference to it working with FMX and 4R70W. That would also be correct if you have a large bolt circle torque convertor C4

 

[Viperwolf1]

The Bronco used 2 different bolt circles over the years. Viperwolf will probably correct me on this.
'73 was the large bolt circle 11.4"
'74-76(?) used the unicorn small bolt circle (10.5") with an extended snout.
'77 went back to the large bolt circle

And that Summit flexplate looks correct. I see reference to it working with FMX and 4R70W. That would also be correct if you have a large bolt circle torque convertor C4

Looks accurate as far as I've seen.

Sent from my SAMSUNG-SM-G891A using Tapatalk

 

[hucklburry rev2]

The Bronco used 2 different bolt circles over the years. Viperwolf will probably correct me on this.
'73 was the large bolt circle 11.4"
'74-76(?) used the unicorn small bolt circle (10.5") with an extended snout.
'77 went back to the large bolt circle

And that Summit flexplate looks correct. I see reference to it working with FMX and 4R70W. That would also be correct if you have a large bolt circle torque convertor C4

Thank you - I couldn't recall the info - I picked up my first C-4 Bronco, a 74, and will have to deal with this soon, swapping the engine and all that.

 

[GWBronco]

That is the exact one that I just installed.