496ci revamped

Speedlink1973 said:
Not sure what to do, but I'm pretty sure
This isn't correct, I called jeg's on the issue and they sent another set of bearings
Which are a different part number but measure the same, the spool is centered up but only half the race sets in the pocket on both sides.

Any ideas?View attachment 11409
Click to expand...
It's your Ford 9 inch diff.
What gears ?
What ratio ?
3 series ? 3.73 ?
Spools are all 4-5 series gears compatible.
 
What is done on the Pontiac 9.3 drop diff side of vintage Gasser Hotrod with 3 series gears is a spacer is used where the bearing presses onto the spool.
You machine turn down the side needed to center the spool in the drop out case 3rd member.
 
Speedlink1973 said:
Not sure what to do, but I'm pretty sure
This isn't correct, I called jeg's on the issue and they sent another set of bearings
Which are a different part number but measure the same, the spool is centered up but only half the race sets in the pocket on both sides.

Any ideas?View attachment 11409
Click to expand...
Be ok for Low Hp Low torque.

But it's High Torque and Healthy Hp 496 BBC .
Likely go Kaboom as is now.
 
Other option is to run a Detroit Locker 3-series.
Think you will blow it up fast Drag Racing at the track.

Race Spool power level your at NOW.
 
The Spool Carrier Bearings need full 100 percent contact in the drop out diff bores for full on drag race abuse.
Not on the side adjustment threads as now...problem yes.
 
One other practical option is loose the 3-series gear with the Race Spool.

Buy a 4 series gearset.
Limit street use on Highway of course.
4.10, 4.30, 4.56, 4.88.
RACE CAR !

Always a tradeoff !
 
If you machine the spool it must gave a Full 1/8" or better radius in the corner of the spool where the side bearing presses on.
Make the spacer from A11 Tool steel or 4340 ChroMo.
Cheep steel will push out crack under race loads.
 
Speedlink1973 said:
Right now the threaded part is a bigger diameter , guessing I need to call Yukon tomorrow.
Click to expand...
Ok.
Seen it before....
Why you need an extra 200-500 rpm drag race I talked about in past.
Forced to use 4-series gears often like now.

Hellcats like yours they Welded the Ring gear to carrier from the factory.
They knew it was living on a prayer day 1 !
 
You can use an Aluminum full spool to save rotating weight but it will wear out the internal splines in 1 race season.

Prefer full steel spools.
Bullet proof.

Competition class racing a Lightweight steel spool is best.

Mark Williams makes the Best driveline parts and also the most expensive.

Strange Engineering is popular here.
I try and sell Mark Williams but guys are pinching pennies....cheep street racers.

I prefer to build 1 time and use best parts if possible.
 
Ok figured it out talked to Tom Stilwell
He's the jeg's axle and driver train tech
It's the right bearings but spool is incorrect.20190107_180910.jpg
Bearing face to bearing face is "5.625
For this pig it's supposed to be "5.25
Ordered new light weight spool
It's 6 lbs
 
Speedlink1973 said:
Ok figured it out talked to Tom Stilwell
He's the jeg's axle and driver train tech
It's the right bearings but spool is incorrect.View attachment 11410
Bearing face to bearing face is "5.625
For this pig it's supposed to be "5.25
Ordered new light weight spool
It's 6 lbs
Click to expand...
Yes.
It also looks like you have a 4.11 gear for a 3-series carrier.
The Ring Gear is real thick for a Ford 9 till you get into 5-7 series for Dirt Track Racing.
 
I'm probably in for a treat...
I was told old gear was thought to be
3.7 :1
It's actually 3.25 : 1 12 pinion teeth divided by 39 ring gear teeth makes it 3.25
Now it 4.11 : 1
I wondered why my short time wasn't coming out right @ 1.7 ish
I'm guessing it's probably going to be close to 1.5 on my short time

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