Idler pulley ?

tazzracing1 · 02-13-2006, 09:14 PM

I was wondering if I need an additional idler with running a 2.93 pulley. I don't notice any slippage but I was curious if I should add one for insurance.
Thank You for the help and your time to help with my ?
Larry

sccobra · 02-13-2006, 10:14 PM

I put one on and then I took it off - it was noisy, in the way, and just extra weight - save your money.

ausie · 02-14-2006, 07:31 AM

It all depends on the belt length. The idler pully will increase belt wrap on the supercharger pully which in turn will reduce slippage of the belt. If you decide to get a set, go with billetflow or Richard Racing. Note: the use of idler pullies will require removal of the belt cover as well as a longer belt. This may look cool but can lead to missing fingers if you put your hands where they should not be if the motor is running. As far as added weight, it would weigh as much as that cheeseburger you had for lunch. With the smaller Supercharger pully, some leverage is lost due to the reduced size which translates into slightly more horse power to turn the rotors and at a sudden change in RPM such as launching or speed shifting down a race track the belt has a tendancy to slip on the pully surface. If what you have now works it probably is not important to change it.

blk04cobra1 · 02-14-2006, 09:23 AM

I would highly recommend one...it insures minimal belt slip

NC03BlkSnake · 02-14-2006, 10:03 AM

With the 2.93 and 4pc. Idler set from Billetflow, the stock belt is utilized which makes it great, plus it looks bad ass. That's the setup I'm running.

Greg

Linn@Amazon · 02-14-2006, 04:16 PM

I would not get an auxillary idler if you are not getting belt slip...some sets ups get it and others dont.. if you do decide..Metco makes a top quality hardcoated pulley that resists fading and scratching...and RR makes a double bearing pulley that matchs with their blower pulley..

MidLifeC · 02-15-2006, 07:32 PM

I second buying the Billetflow idlers. They are top quality products and Doug will guarantee them 100% (and you will be supporting a product made in Michigan). You should replace the stock bottom idler; there have been dozens of them that have exploded.

Linn@Amazon · 02-16-2006, 02:41 PM

lots of good choices for aftermarket idlers and as stated should be done as a safety issue..I have an exploded stock idler pulley on my desk for emphasis..this happens far too frequently with the stock idlers and can cause damage under the hood.

ausie · 02-17-2006, 07:26 AM

For those that have the exploded idler pully or know about that issue, is it due to changing the supercharger pully or just a matter of time if nothing was changed? I know what could happen if the tension arm breaks since I had that happen to my Explorer (at least it was in the driveway when it happened and not while on the road).

Linn@Amazon · 02-17-2006, 06:56 PM

changing the blower pulley is not a single contributiong factor..the stock idlers are just weak and very poorly designed...we've seen them go bad under many different circumstances

tazzracing1 · 02-18-2006, 01:35 AM

I ordered a set from billet flow today. Thank You for all the help and advice.

Ram77mus · 02-18-2006, 04:12 AM

Quote:

Originally Posted by tazzracing1

I was wondering if I need an additional idler with running a 2.93 pulley. I don't notice any slippage but I was curious if I should add one for insurance.
Thank You for the help and your time to help with my ?
Larry

Well you said it "should I add one for insurance." you can't go wrong with insurance. Keep in mind the more belt rap the blower pulley has the less chance of slippage. Keep that belt snug!

03slidewayzSVT · 02-18-2006, 09:35 AM

now here some belt wrap

blk04cobra1 · 02-18-2006, 10:17 AM

Quote:

Originally Posted by 03slidewayzSVT

now here some belt wrap

man that's an old looking belt

...spray some tire shine on it to spruce it up

03slidewayzSVT · 02-18-2006, 10:43 AM

YES SIR TORREY will do!!!!

02-13-2006, 09:14 PM	#1
tazzracing1 SCMC Member Join Date: Jul 2004 Location: Paw Paw, michigan Posts: 904	Idler pully??? I was wondering if I need an additional idler with running a 2.93 pulley. I don't notice any slippage but I was curious if I should add one for insurance. Thank You for the help and your time to help with my ? Larry __________________ 2003 S/C Cobra(born 6/10/2002 #439 of 8394) 2.93 pulley/Cold air intake X-pipe with cats/Magnaflowcatback Strut tower bar and subframe connectors MGW shifter second to none/best of the best Billetflow pullies with snub pulley 1997 Cobra(retired) www.michiganmustang.com

02-14-2006, 07:31 AM	#3
ausie Don't let the dog drive Join Date: Apr 2004 Location: Kinston, NC Posts: 1,883	It all depends on the belt length. The idler pully will increase belt wrap on the supercharger pully which in turn will reduce slippage of the belt. If you decide to get a set, go with billetflow or Richard Racing. Note: the use of idler pullies will require removal of the belt cover as well as a longer belt. This may look cool but can lead to missing fingers if you put your hands where they should not be if the motor is running. As far as added weight, it would weigh as much as that cheeseburger you had for lunch. With the smaller Supercharger pully, some leverage is lost due to the reduced size which translates into slightly more horse power to turn the rotors and at a sudden change in RPM such as launching or speed shifting down a race track the belt has a tendancy to slip on the pully surface. If what you have now works it probably is not important to change it. __________________ 2004 SVT Cobra, Silver, February 2004 SVT Build # 2485 out of 3768 SLP Loudmouth Cat-back UPR double lock firewall adjuster UPR GMS extreme double hook quadrant Wheels: Ford SVT 10th anniv. wheels (track duty) SVE 10th anniv. style 17x9F, 10x10.5R BBS RK Plasma 18x8.5F, 18x10R (retired) (retired) 2001 black SVT Cobra, October 2001 missed but not forgotten

02-14-2006, 09:23 AM	#4
blk04cobra1 Registered User Join Date: Nov 2004 Location: Charlotte, NC Posts: 1,374	I would highly recommend one...it insures minimal belt slip __________________ 2004 Cobra HP Twin 67's 785rwhp on 9lbs of boost

02-14-2006, 10:03 AM	#5
NC03BlkSnake Registered User Join Date: Sep 2005 Posts: 47	With the 2.93 and 4pc. Idler set from Billetflow, the stock belt is utilized which makes it great, plus it looks bad ass. That's the setup I'm running. Greg __________________ 03 Black Cobra Coupe Mods: Billetflow 2.76 w/4 idler setup PFab Intercooler Resevoir Amazon Racing CAI VRS O/R X-pipe Mac DuraBlack Coated Cat-Back SCT Chip/Tuned by Pro-Dyno 475-RWHP/507-RWTQ

02-17-2006, 07:26 AM	#9
ausie Don't let the dog drive Join Date: Apr 2004 Location: Kinston, NC Posts: 1,883	For those that have the exploded idler pully or know about that issue, is it due to changing the supercharger pully or just a matter of time if nothing was changed? I know what could happen if the tension arm breaks since I had that happen to my Explorer (at least it was in the driveway when it happened and not while on the road). __________________ 2004 SVT Cobra, Silver, February 2004 SVT Build # 2485 out of 3768 SLP Loudmouth Cat-back UPR double lock firewall adjuster UPR GMS extreme double hook quadrant Wheels: Ford SVT 10th anniv. wheels (track duty) SVE 10th anniv. style 17x9F, 10x10.5R BBS RK Plasma 18x8.5F, 18x10R (retired) (retired) 2001 black SVT Cobra, October 2001 missed but not forgotten

02-13-2006, 10:14 PM	#2
sccobra Registered User Join Date: Apr 2005 Location: Sarasota FL Posts: 6	I put one on and then I took it off - it was noisy, in the way, and just extra weight - save your money.

02-14-2006, 04:16 PM	#6
Linn@Amazon Registered User Join Date: Jun 2005 Posts: 198	I would not get an auxillary idler if you are not getting belt slip...some sets ups get it and others dont.. if you do decide..Metco makes a top quality hardcoated pulley that resists fading and scratching...and RR makes a double bearing pulley that matchs with their blower pulley..

02-15-2006, 07:32 PM	#7
MidLifeC Registered User Join Date: Dec 2004 Location: Livonia, MI Posts: 15	I second buying the Billetflow idlers. They are top quality products and Doug will guarantee them 100% (and you will be supporting a product made in Michigan). You should replace the stock bottom idler; there have been dozens of them that have exploded.

02-16-2006, 02:41 PM	#8
Linn@Amazon Registered User Join Date: Jun 2005 Posts: 198	lots of good choices for aftermarket idlers and as stated should be done as a safety issue..I have an exploded stock idler pulley on my desk for emphasis..this happens far too frequently with the stock idlers and can cause damage under the hood.

02-17-2006, 06:56 PM	#10
Linn@Amazon Registered User Join Date: Jun 2005 Posts: 198	changing the blower pulley is not a single contributiong factor..the stock idlers are just weak and very poorly designed...we've seen them go bad under many different circumstances

02-18-2006, 01:35 AM	#11
tazzracing1 SCMC Member Join Date: Jul 2004 Location: Paw Paw, michigan Posts: 904	I ordered a set from billet flow today. Thank You for all the help and advice. __________________ 2003 S/C Cobra(born 6/10/2002 #439 of 8394) 2.93 pulley/Cold air intake X-pipe with cats/Magnaflowcatback Strut tower bar and subframe connectors MGW shifter second to none/best of the best Billetflow pullies with snub pulley 1997 Cobra(retired) www.michiganmustang.com

02-18-2006, 09:35 AM	#13
03slidewayzSVT Registered User Join Date: Oct 2005 Location: Kannapolis, NC Posts: 475	now here some belt wrap

02-18-2006, 10:43 AM	#15
03slidewayzSVT Registered User Join Date: Oct 2005 Location: Kannapolis, NC Posts: 475	YES SIR TORREY will do!!!!

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