HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech
Register Photo Gallery FAQ Community Calendar


Reply
 
Thread Tools Display Modes
Old 05-15-2011, 08:32 PM   #11
Mark Yacavone
Veteran Member
 
Mark Yacavone's Avatar
 
Join Date: Mar 2002
Location: Miles From Nowhere
Posts: 7,658
Likes: 2,764
Liked 4,848 Times in 1,842 Posts
Default Re: TH350 Clutches / Modifications

Quote:
Originally Posted by Bob Mulry View Post
Hi Alan,

Got to be careful about not running the wavy steel on the intermediate clutch pack because sometimes the flat steels interfere with the apply piston return spring retainer. This will also give you an incorrect clutch pack clearance...

Just a heads up,
Bob
I put a spacer under the int. piston so it doesn't return as far , thus tightening the clearance and quickening the apply.
__________________
Real life never quite adds up.... Jay Farrar
Mark Yacavone is offline   Reply With Quote
Old 05-15-2011, 08:40 PM   #12
Alan Roehrich
VIP Member
 
Alan Roehrich's Avatar
 
Join Date: May 2006
Location: Murfreesboro TN
Posts: 4,969
Likes: 1,136
Liked 1,221 Times in 315 Posts
Default Re: TH350 Clutches / Modifications

Quote:
Originally Posted by Chad E532 View Post
Alan,
Thanks for the info on the clutch/plate counts and also the tip on replacing the wave plate with flat steels.
What is the theory behind drilling the holes out on the direct clutch? It is just a cooling enhancement for street driven cars?

This is a race only car that is slowly inching it's way to I/SA as I save up the funds to replace the bracket engine with a legal stocker.
Thanks again.

Chad, I've seen that modification done, but not seen any real gain.

Honestly, the transmission for Stock will be very different. In fact, for your car, in I/SA, I'd be looking at a 200 Metric from McClay or Arnett. To convert your 350 to a class transmission, you'll need to replace both drums with aluminum drums, as well as having some other stuff lightened. The difference between what you're building now and what you'll need for Stock is about a tenth.
__________________
Alan Roehrich
212A G/S
Alan Roehrich is offline   Reply With Quote
Old 05-19-2011, 07:51 PM   #13
Daran Summerton
Senior Member
 
Daran Summerton's Avatar
 
Join Date: Jun 2003
Location: Las Vegas nv
Posts: 599
Likes: 18
Liked 66 Times in 37 Posts
Default Re: TH350 Clutches / Modifications

http://www.truckinweb.com/tech/0510t.../photo_03.html


What do ya'll think???
__________________
72 cutlass
Daran Summerton is offline   Reply With Quote
Old 05-19-2011, 08:19 PM   #14
ss3011
Senior Member
 
ss3011's Avatar
 
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 900
Likes: 67
Liked 238 Times in 112 Posts
Default Re: TH350 Clutches / Modifications

One of the reasons for drilling out the "cooling holes" in the OD of the clutch housing is to allow trapped oil to escape. The oil could build up on the OD of the clutch plates, when the housing spins and drag the clutch on. By drilling holes in the correct areas of the splines, the oil will exhaust and won't apply the clutch. Usually this trick only is done on the direct clutch housing.
ss3011 is offline   Reply With Quote
Old 05-19-2011, 08:48 PM   #15
Alan Roehrich
VIP Member
 
Alan Roehrich's Avatar
 
Join Date: May 2006
Location: Murfreesboro TN
Posts: 4,969
Likes: 1,136
Liked 1,221 Times in 315 Posts
Default Re: TH350 Clutches / Modifications

Quote:
Originally Posted by Daran Summerton View Post
Daran, that is exactly what I described up thread. It yields a 2.75 low gear, because the front planetary remains unchanged.

That photo is merely a picture of a stock TH350 rear planetary carrier next to a stock 700 R4 planetary. That's not what it looks like when ready to install.
__________________
Alan Roehrich
212A G/S
Alan Roehrich is offline   Reply With Quote
Old 05-20-2011, 02:07 AM   #16
Mark Yacavone
Veteran Member
 
Mark Yacavone's Avatar
 
Join Date: Mar 2002
Location: Miles From Nowhere
Posts: 7,658
Likes: 2,764
Liked 4,848 Times in 1,842 Posts
Default Re: TH350 Clutches / Modifications

Quote:
Originally Posted by Daran Summerton View Post
My latest brillant idea, 1966 Impala SS/NA 283/220 low budget!!!! 5.86 gear stocker radials, footbrake stock t-350 with 8" converter approx. 4500.
60 ft 1.86
1/4 12.80 on a 12.15 index
mph 106

My U/SA left harder

Car will never be a killer, just looking for consistancy 2-3 under.
Daran, You're way under geared and about a thousand short on the stall speed for openers.
__________________
Real life never quite adds up.... Jay Farrar
Mark Yacavone is offline   Reply With Quote
Old 05-20-2011, 02:15 AM   #17
Alan Roehrich
VIP Member
 
Alan Roehrich's Avatar
 
Join Date: May 2006
Location: Murfreesboro TN
Posts: 4,969
Likes: 1,136
Liked 1,221 Times in 315 Posts
Default Re: TH350 Clutches / Modifications

Mark, I was thinking 6.17 gears, if it's a 12 bolt, and about 6000 stall, if he's got a Super Stock engine that will spin anything like it should. Not sure a 2.75 low will work because of the drop between 1st and 2nd. That extra point and a half of gear is a big deal to a small engine with no torque, especially in a heavy car.

Going from 2.52 in 1st to 1.52 in 2nd is not the same as going from 2.75 in 1st to 1.6 in 2nd, even though the 1st is low, the extra 0.15 gear drop makes a bigger difference than some think, because they forget the car is going SLOWER when it comes out of low gear with a 2.75 than it is with a 2.52, that amplifies the drop.
__________________
Alan Roehrich
212A G/S
Alan Roehrich is offline   Reply With Quote
Old 05-20-2011, 02:29 AM   #18
Mark Yacavone
Veteran Member
 
Mark Yacavone's Avatar
 
Join Date: Mar 2002
Location: Miles From Nowhere
Posts: 7,658
Likes: 2,764
Liked 4,848 Times in 1,842 Posts
Default Re: TH350 Clutches / Modifications

Quote:
Originally Posted by Alan Roehrich View Post
Mark, I was thinking 6.17 gears, if it's a 12 bolt, and about 6000 stall, if he's got a Super Stock engine that will spin anything like it should. Not sure a 2.75 low will work because of the drop between 1st and 2nd. That extra point and a half of gear is a big deal to a small engine with no torque, especially in a heavy car.

Going from 2.52 in 1st to 1.52 in 2nd is not the same as going from 2.75 in 1st to 1.6 in 2nd, even though the 1st is low, the extra 0.15 gear drop makes a bigger difference than some think, because they forget the car is going SLOWER when it comes out of low gear with a 2.75 than it is with a 2.52, that amplifies the drop.
I imagine Daran is trying to pick up the 60' with the low gear change.
If he had the right rear gear, he wouldn't need the low gear set.
We used about 5300 stall in a 283/220 SS car, about 30 years ago.
He needs a 6.40 ford or a 6.50 Dana to do it right.
__________________
Real life never quite adds up.... Jay Farrar
Mark Yacavone is offline   Reply With Quote
Old 05-20-2011, 02:33 AM   #19
Alan Roehrich
VIP Member
 
Alan Roehrich's Avatar
 
Join Date: May 2006
Location: Murfreesboro TN
Posts: 4,969
Likes: 1,136
Liked 1,221 Times in 315 Posts
Default Re: TH350 Clutches / Modifications

We've got a 6500 in the SS/EA car. I've got a 2.75 low in it because I can't get the 5.57 they say I need, the closest I can get is a 5.38, they don't have a 5.57 for a Dana 60. I'm not sure the RPM drop won't hurt me a little. But I need the car to move harder, and I think between the stall and the big block, I can pull that drop okay.
__________________
Alan Roehrich
212A G/S
Alan Roehrich is offline   Reply With Quote
Old 05-21-2011, 09:28 AM   #20
Daran Summerton
Senior Member
 
Daran Summerton's Avatar
 
Join Date: Jun 2003
Location: Las Vegas nv
Posts: 599
Likes: 18
Liked 66 Times in 37 Posts
Default Re: TH350 Clutches / Modifications

Just installed a light T-350 2.75 low with brake this time. On the brake the converter is going 5200. Heading to Gainesville tonight to try. Hoping for a 1.5 something??? 60 ft. I have a 12 bolt in it with 9x30 radials. Perhaps a 6.14 and a ET 29.5 will be next.
__________________
72 cutlass
Daran Summerton is offline   Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:20 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.