Belt slip is a reality contrary to claims see the proof - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JANNETTYRACING · 10-20-2015, 09:32 AM

I spent the weekend at Palmer Motorsports park in Ware Massachusetts with my 2013 ZL-1 Auto and burned through 3 tanks of fuel with 11 Sessions over the 2 day event.

With the Trend to add a smaller upper pulley to your ZL-1 which I have always recommended against for obvious reasons, I though it fitting to share this picture after the event.

I hear it all the time I don't have any belt slip, I say see the proof.

I have an 18% lower with a stock upper and the shortest belt I can run.

My Throttle body was spottless before the event and now has a fair amount of belt dust.

The moral of the story, Don't fall in the the trap of smaller upper pulleys unless it's your only option.

Ted.

Stephen12ZL1 · 10-20-2015, 11:14 AM

Green HD belt may be a better choice.

JANNETTYRACING · 10-20-2015, 11:18 AM

Quote:

Originally Posted by Stephen12ZL1

Green HD belt may be a better choice.

We run those as well but not available in every size.

I don't believe it will cure belt slip although a tougher belt for sure.

Ted.

15ZL1 · 10-20-2015, 12:00 PM

Is there a 10 rib option for this?

kevint · 10-20-2015, 12:05 PM

Is there any way blower rpm could be measured to determine how bad the slippage is?

JANNETTYRACING · 10-21-2015, 10:13 AM

Quote:

Originally Posted by kevint

Is there any way blower rpm could be measured to determine how bad the slippage is?

Yes on my dyno.

The point is there is always belt slip, contrary to popular belief.

So Lets Not make it worse with smaller pulleys up top.

Do all your blower speeds with the lower pulley.

Ted.

winterboy8 · 10-21-2015, 10:20 AM

Quote:

Originally Posted by JANNETTYRACING

Yes on my dyno.

The point is there is always belt slip, contrary to popular belief.

So Lets Not make it worse with smaller pulleys up top.

Do all your blower speeds with the lower pulley.

Ted.

Ted,

Will changing the idler pulley help with this or at least provide you the ability to change to one of the Green HD belts mentioned above?

Stephen12ZL1 · 10-21-2015, 12:12 PM

I believe the rubber residue is coming from the edges of the belt, and it not necessarily indicative of "slip"

ToddB · 10-21-2015, 01:41 PM

To me it looks like fly shit. No belt slip. Lol

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revo1059 · 10-21-2015, 02:28 PM

Quote:

I believe the rubber residue is coming from the edges of the belt, and it not necessarily indicative of "slip"

I wonder if a stock car, run through the same marathon testing would show similar residue......

Stephen12ZL1 · 10-21-2015, 04:39 PM

top of the belt also has small grooves in it which could indicate debris between the belt and idler for an instant...

2013 ZL1 #7860 · 10-21-2015, 06:38 PM

Quote:

Originally Posted by JANNETTYRACING

Yes on my dyno.

The point is there is always belt slip, contrary to popular belief.

So Lets Not make it worse with smaller pulleys up top.

Do all your blower speeds with the lower pulley.

Ted.

So I already have a 10" lower and only make 10 psi due to altitude.

Can I go to a 10 rib upper and lower?

Trackman · 10-21-2015, 07:31 PM

Looks insignificant to me considering the workout it had.

JANNETTYRACING · 10-22-2015, 09:13 AM

Quote:

Originally Posted by winterboy8

Ted,

Will changing the idler pulley help with this or at least provide you the ability to change to one of the Green HD belts mentioned above?

The larger Idler gives about 1-2% more wrap but may allow a move to an HD belt, we often play with Idler pulleys to adjust belt length.

Quote:

Originally Posted by revo1059

I wonder if a stock car, run through the same marathon testing would show similar residue......

Unlikely as the blower speed is 18% lower.

Quote:

Originally Posted by 2013 ZL1 #7860

So I already have a 10" lower and only make 10 psi due to altitude.

Can I go to a 10 rib upper and lower?

Your currently at 28% or 21,700 blower rpm at 6500 crank rpm

Max recommended blower rpm is 23000.

The closest you can get in 8 rib is 9.17-2.55 combo for 38% or 23,400

LPE does offer a 9.73-2.70 10 rib that is good for 35% or 22,800 which would be your ulimtate solution.

My recommendation, try and do everything with a lower pulley unless you have no other choice.

Ted.

10-20-2015, 09:32 AM	#1
JANNETTYRACING Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009 Location: ON THE DYNO WATERBURY CT. Posts: 15,225	Belt slip is a reality contrary to claims see the proof I spent the weekend at Palmer Motorsports park in Ware Massachusetts with my 2013 ZL-1 Auto and burned through 3 tanks of fuel with 11 Sessions over the 2 day event. With the Trend to add a smaller upper pulley to your ZL-1 which I have always recommended against for obvious reasons, I though it fitting to share this picture after the event. I hear it all the time I don't have any belt slip, I say see the proof. I have an 18% lower with a stock upper and the shortest belt I can run. My Throttle body was spottless before the event and now has a fair amount of belt dust. The moral of the story, Don't fall in the the trap of smaller upper pulleys unless it's your only option. Ted. Attached Images __________________ www.jannettyracing.com Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com

10-20-2015, 11:14 AM	#2
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	Green HD belt may be a better choice. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

10-20-2015, 12:00 PM	#4
15ZL1 Drives: 2015 ZL1 Join Date: May 2015 Location: ILLINOIS Posts: 109	Is there a 10 rib option for this? __________________ ERL 434 LSA super block with 6 bolt 1/2" studs Ported stock blower 2.55/9.55 and NW 102 tb 5" JLT CAI, custom radiator Mamofied TFS heads with 1.8 Y/T rockers and Johnson lifters FI interchiller E85 flex fuel Circle D 3200 Tuned by Speed inc. 755/730 on 93 and 850/822 on corn

10-21-2015, 12:12 PM	#8
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	I believe the rubber residue is coming from the edges of the belt, and it not necessarily indicative of "slip" __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

10-21-2015, 04:39 PM	#11
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	top of the belt also has small grooves in it which could indicate debris between the belt and idler for an instant... __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

10-20-2015, 12:05 PM	#5
kevint Drives: 2013 1SS Join Date: Dec 2012 Location: New Jersey Posts: 716	Is there any way blower rpm could be measured to determine how bad the slippage is?

10-21-2015, 01:41 PM	#9
ToddB Drives: 2011 2SS Convertible Supercharged Join Date: Nov 2010 Location: WI Cert Welder Navy NSSN Posts: 1,157	To me it looks like fly shit. No belt slip. Lol Sent from my iPhone using Tapatalk

10-21-2015, 07:31 PM	#13
Trackman Drives: 67RS Camaro ,Black 2013 ZL1 Join Date: Jun 2010 Location: Alberta Posts: 1,408	Looks insignificant to me considering the workout it had.