NACA 66 Special A/BGS

[gray63]

Rob,  Good to hear that the project is moving along.  I will call you the next time that I am in Butler for a visit.
We had a successful experience at Bonneville with our 56 Corvette.  We qualified for our B license at 197+.
We also ran at the Last Maxton event. It was quite an experience.

Regards,  Dave

[robfrey]

I would look at a slider clutch  you can make them handle "anything"

Are you thinking of a Crowerglide or something?
I'm also looking for something relatively inexpensive as I don't need to cut a good light anything. Just engage once per run.
Many clutches designed for this kind of power are extremely elegant engineering marvels and are priced accordingly.
The amount the clutch slips and the consistency are what the Pro Mod boys are looking for.
Just need a clutch to hold the torque. The planetary clutch packs will absorb the harshness of the shifts and along with longer than usual axles giving me some additional torque absorption, we hope to avoid the problems that have plagued the Speed Demon.

[Peter Jack]

Is it worth looking at a Tilton or something similar? There are several multi-disc brands out there. They are readily available even on the used market, are easily rebuildable and are designed to take a fair degree of abuse. They just don't like being slipped a lot.

Pete

[jl222]

 
 We use a Hays 6 finger centrifugal clutch lever, 3 disk 10'' clutch. We don't slip it because of trouble getting
to it and time spent adjusting. We destroyed the stands on an older style 3 lever alcohol dragster clutch.
Its been awhile since we bought but it was around $1300 + the disk $125 from what I remember probably more now.
 Our bellhousing depth is 711/16'' but had to grind down floater plates [ still within min specs] to fit inside bellhousing for 3 disk.

  Hays 216 398 8300 or 216 688 8300

 This clutch was being used on pro-mods at that time.

  We started with 2 disk but were slipping it so went to 3 disk by just adding longer floater plate stands.

 Our Camaro weighs 4900 lbs. so if your lighter and slippier a 2 disk might work.

  JL222

[John Burk]

Quarter Master makes 7 1/4" and smaller multi disc clutches and 9 1/4" diameter ring gears for low ground clearance bellhousings that use their rear entry reverse rotation starters . Their rear entry bellhousings are cast aluminum so I had to add a starter pocket to my Lakewood bellhousing .

[robfrey]

I believe I need a 1-3/8 x 10 spline clutch. I'm not sure what dia I can get away with in the low ground clearance bell. I think the bigger in diameter I choose, the less number of disk I can have.
Tilton does not have any clutch with the shaft interface I need or the torque capacity.

[jdeleon]

Rob,  what max flywheel diameter can you use?  I might have an old 10" - 3 disc (1-3/8-10) AFT laying around in my shop.

[jl222]

I believe I need a 1-3/8 x 10 spline clutch. I'm not sure what dia I can get away with in the low ground clearance bell. I think the bigger in diameter I choose, the less number of disk I can have.
Tilton does not have any clutch with the shaft interface I need or the torque capacity.

  The Hays clutch doesn't care about spline size just diameter of disk and right  spline in disk for input shaft.

        JL222

[Scott]

We had a 3 disk Tilton in 2010 that got destroyed. Now run a Crower no problems. Look at advertised torque limits.  SB

[robfrey]

Rob,  what max flywheel diameter can you use?  I might have an old 10" - 3 disc (1-3/8-10) AFT laying around in my shop.

I think that bell uses a 153t flywheel.

[jdeleon]

Rob,  what max flywheel diameter can you use?  I might have an old 10" - 3 disc (1-3/8-10) AFT laying around in my shop.

I think that bell uses a 153t flywheel.

I'll look for it monday and give a flywheel diameter.

[jdeleon]

Found it.  Its a 2 disc lite weight clutch from my OLD p/s days.  O.A.L. dia of flywheel is 14" .   OAL hite is @ 5.5"

DSC00179 by jdeleon1955, on Flickr

[robfrey]

Wow. That clutch looks really nice.

[robfrey]

Well, we got a start on the water tank.

[robfrey]

We think the water tank will be one of the more difficult sections of the build as it houses two pumps, one radiator, is partitioned to separate engine cooling water from inter cooling water and is a structural part of the chassis.