Larger Tensioner vs Smaller Belts - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

Reply
 
 
 
Thread Tools Search this Thread
Old 12-12-2005, 09:48 PM   #1
Senior Member
Certified GM nut
Thread Starter
 
Join Date: Sep 2005
Location: Home Sweet Home in New York
Posts: 2,009
Thanks: 0
Thanked 0 Times in 0 Posts
Mortehl is on a distinguished road
Default Larger Tensioner vs Smaller Belts

I've noticed that some people use a larger tensioner pulley while others use a smaller belt when adding a smaller SC pulley. Beyond the fact that the larger tension pulley is cheaper, are there any other reasons to take one approach versus the other?
Mortehl is offline   Reply With Quote
Old 12-12-2005, 09:51 PM   #2
Junior Member
 
Join Date: Mar 2004
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
harofreak00 is on a distinguished road
Default

i think you get more belt wrap on the SC one way of the other... not sure which way though...

i had both options in front of me.. and i did the belt
harofreak00 is offline   Reply With Quote
Old 12-12-2005, 09:58 PM   #3
Senior Member
Certified GM nut
Thread Starter
 
Join Date: Sep 2005
Location: Home Sweet Home in New York
Posts: 2,009
Thanks: 0
Thanked 0 Times in 0 Posts
Mortehl is on a distinguished road
Default

Quote:
Originally Posted by harofreak00
i think you get more belt wrap on the SC one way of the other... not sure which way though...

i had both options in front of me.. and i did the belt
Same here. I'm trying to make a choice which way to go.
Mortehl is offline   Reply With Quote
Old 12-12-2005, 10:24 PM   #4
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default

More belt wrap with the bigger tensioner.

Theory is, it allows less slip.
TrueWildMan is offline   Reply With Quote
Old 12-12-2005, 10:46 PM   #5
Senior Member
Certified GM nut
Thread Starter
 
Join Date: Sep 2005
Location: Home Sweet Home in New York
Posts: 2,009
Thanks: 0
Thanked 0 Times in 0 Posts
Mortehl is on a distinguished road
Default

Quote:
Originally Posted by TrueWildMan
More belt wrap with the bigger tensioner.

Theory is, it allows less slip.
Well that settles it for me then.
Mortehl is offline   Reply With Quote
Old 12-12-2005, 11:36 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

S2? Not as critical.

S1 92/93 L67 CRITICAL for an oversized tensioner pulley.
S1 94/95 L67 STRONGLY suggested for the oversized pulley.

By belt path design, the S1 is marginal to begin with. The smaller pulley'* compound the problem.
willwren is offline   Reply With Quote
Old 12-13-2005, 12:22 AM   #7
Senior Member
Posts like a Corvette
 
Join Date: Jul 2004
Location: Bolingbrook, IL Location: Clarkston, MI
Posts: 1,256
Thanks: 0
Thanked 0 Times in 0 Posts
llBlazin_llLo is on a distinguished road
Default

You best bet is on a Series 1 is the oversized tensioner pulley also get a NAPA Gates belt and you will NEVER have to think about belt slip again.

The only thing that an OEM tensioner pulley and smaller belt has to offer is less rotating mass. But that mass you can't even measure.

I run a smaller tensioner pulley and a belt about half the lenght (51") of a stock belt and have more belt wrap then any Series 1 out their but that is a little custom.
llBlazin_llLo is offline   Reply With Quote
Old 12-21-2005, 07:19 PM   #8
Senior Member
Posts like a Northstar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Thanks: 0
Thanked 0 Times in 0 Posts
Jason1351 is on a distinguished road
Default

S2? Not as critical

Sorry Will, gotta correct ya on that. Got a smaller */C pully and deffinetly use smaller belt. Larger pully causes belt rub very badly, specially under WOT.
Jason1351 is offline   Reply With Quote
Old 12-21-2005, 07:38 PM   #9
Senior Member
True Car Nut
 
Join Date: Dec 2002
Location: Sauk Centre, MN
Posts: 5,458
Thanks: 0
Thanked 0 Times in 0 Posts
OLBlueEyesBonne is on a distinguished road
Default

I did both a larger tensioner pulley and a smaller belt and Sunday when I opened the hood I found A LOT of rubber duston the SC snout that wasn't there two weeks earlier when I put the new belt on. :(

Gonna order a Gatorback and see if that helps. Otherwise I'm not sure what to do.
OLBlueEyesBonne is offline   Reply With Quote
Old 12-21-2005, 09:51 PM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Quote:
Originally Posted by Jason1351
S2? Not as critical

Sorry Will, gotta correct ya on that. Got a smaller */C pully and deffinetly use smaller belt. Larger pully causes belt rub very badly, specially under WOT.
Jason, you're misreading my reply. I said the oversized tensioner pulley is not as critically needed for a S2. It'* REQUIRED for a S1 92/93, and STRONGLY suggested for a 94/95.

You can go either oversized idler or smaller belt with a smaller SC pulley. S1 really has no choice.

FYI Jason, many S2 cars here are running the oversized idler with no problems whatsoever, including hundreds of GTP'* with the L67 as well.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
The MOS family may have just gotten larger... MOS95B Lounge 36 08-08-2006 08:57 PM
Larger brakes (92-99) on a 1987-1991? OLBlueEyesBonne Performance, Brainstorming & Tuning 0 04-16-2005 06:15 PM
Larger/Bored TB? GonneVille Performance, Brainstorming & Tuning 3 12-07-2004 10:46 AM
ZZ PERFORMANCE MINI AFC AND A LARGER TB Forced Induction 8 05-27-2003 08:03 PM
HP gains on larger TB? 93-SSEI- Performance, Brainstorming & Tuning 15 02-26-2003 05:36 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:33 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.