Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
SDTW Custom Wheels & Tires
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > General Camaro Forums > Camaro ZL1 Forum - ZL1 Specific Topics


Reply
 
Thread Tools
Old 05-03-2018, 06:17 PM   #15
SecondZ28
 
SecondZ28's Avatar
 
Drives: 2013 ZL1
Join Date: Dec 2012
Location: Illinois
Posts: 718
Quote:
Originally Posted by JANNETTYRACING View Post
You are installing larger injectors with this 18% pulley correct?

It is much better to upgrade the crank pulley and leave the stock upper.

Ted.
If replacing the isolator, doesn't it make sense to do at least a 2.5 pulley anyway?
__________________
'13 ZL1
'06 TBSS
'98 TJ
'87 GN
SecondZ28 is offline   Reply With Quote
Old 05-04-2018, 07:30 AM   #16
JANNETTYRACING

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 13,935
Quote:
Originally Posted by SecondZ28 View Post
If replacing the isolator, doesn't it make sense to do at least a 2.5 pulley anyway?
No, why induce belt slip with a smaller pulley?

Change the lower and keep the stock pulley up top and keep max belt traction.

You have not said if you plan to change injectors.
__________________
www.jreperformanceparts.com
Celebrating 32 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705
JANNETTYRACING is offline   Reply With Quote
Old 05-04-2018, 05:56 PM   #17
Roadking107
 
Drives: Camaro ZL1
Join Date: Aug 2017
Location: Canada
Posts: 44
Quote:
Originally Posted by JANNETTYRACING View Post
You are installing larger injectors with this 18% pulley correct?

It is much better to upgrade the crank pulley and leave the stock upper.

Ted.
Yes larger injectors and upgraded HX. Griptec pulley and changing out the isolator
Roadking107 is offline   Reply With Quote
Old 05-05-2018, 07:40 AM   #18
SecondZ28
 
SecondZ28's Avatar
 
Drives: 2013 ZL1
Join Date: Dec 2012
Location: Illinois
Posts: 718
Quote:
Originally Posted by JANNETTYRACING View Post
No, why induce belt slip with a smaller pulley?

Change the lower and keep the stock pulley up top and keep max belt traction.

You have not said if you plan to change injectors.
ID-1050ís

CTS-Vís have been running with a 2.4/2.5 upper for years; with the right belt and a 100mm idler. Iíve seen some report slip with a 2.38/2.40/2.45 but the 2.50/2.55 seem to do fine.

It also setups up for future headers with a 8.6/2.5
__________________
'13 ZL1
'06 TBSS
'98 TJ
'87 GN
SecondZ28 is offline   Reply With Quote
Old 05-05-2018, 08:09 AM   #19
JANNETTYRACING

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 13,935
Quote:
Originally Posted by SecondZ28 View Post
ID-1050ís

CTS-Vís have been running with a 2.4/2.5 upper for years; with the right belt and a 100mm idler. Iíve seen some report slip with a 2.38/2.40/2.45 but the 2.50/2.55 seem to do fine.

It also setups up for future headers with a 8.6/2.5
Belt slip is not something you can detect with a boost gauge.

We used Laser RPM sensors on the crank and supercharger pulley to determine slip and it is real, you can also pick up traces of black belt dust around the throttle body which comes from the upper pulley.

Great choice on the injectors.
__________________
www.jreperformanceparts.com
Celebrating 32 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705
JANNETTYRACING is offline   Reply With Quote
Old 05-05-2018, 12:47 PM   #20
robrocketanski
 
robrocketanski's Avatar
 
Drives: ZL1 Convertible Auto
Join Date: Apr 2015
Location: Ferndale, Michigan
Posts: 316
I have never believed that .05 to .1 inch difference in pulley is all it takes to make it go from no slip to slip. As in, 2.38 to 2.45 might slip but 2.5 doesn't. I used a 2.75 upper for 2k miles and there is black coloring on my water pump below the upper pulley.

Whether the slip is that big of problem is a matter of opinion I guess but there probably is some.
__________________
LS3 intake and throttle body, Huron Speed Products twin turbo with 6265 oil less turbos, and 3" header back, JRE smooth cam, ID1300, Fore dual 450lph pumps with MSD voltage booster, A6, 325/45/17 M&H Racemaster
robrocketanski is offline   Reply With Quote
Old 05-07-2018, 07:07 AM   #21
JANNETTYRACING

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 13,935
Quote:
Originally Posted by robrocketanski View Post
I have never believed that .05 to .1 inch difference in pulley is all it takes to make it go from no slip to slip. As in, 2.38 to 2.45 might slip but 2.5 doesn't. I used a 2.75 upper for 2k miles and there is black coloring on my water pump below the upper pulley.

Whether the slip is that big of problem is a matter of opinion I guess but there probably is some.
Any slip is lost performance.

Ted.
__________________
www.jreperformanceparts.com
Celebrating 32 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705
JANNETTYRACING is offline   Reply With Quote
Old 05-07-2018, 11:46 AM   #22
RobZL1
fo'shizZL1
 
RobZL1's Avatar
 
Drives: 2014 ZL1
Join Date: Aug 2017
Location: ATL
Posts: 225
Quote:
Originally Posted by JANNETTYRACING View Post
Any slip is lost performance.

Ted.
Spinnin' ain't winnin'.
__________________
2014 Red Hot #1503 | 629 SAE | RotoFab | 28% OD | 1-7/8 LT's | JMS BAP | ID850 | TR7IX | MSD Wires | Monster LT1-S Triple |
RobZL1 is offline   Reply With Quote
Old 05-07-2018, 12:02 PM   #23
Can'tHave2MuchHP
God - Family - Country
 
Can'tHave2MuchHP's Avatar
 
Drives: 2018 Camaro ZL1 A10 Coupe in White
Join Date: Mar 2015
Location: Michigan
Posts: 2,963
Quote:
Originally Posted by RobZL1 View Post
Spinnin' ain't winnin'.
Or is it Slippin' Ain't Winnin' in this case?
__________________
Current Garage:
2018 Camaro ZL1 | A10 | White | Coupe | PDR | Nav | Carbon Fiber
2017 Corvette C7 Z06 | A8 | Black | Z07 | 3LZ | Carbon Fiber
2013 Corvette 427 | M6 | White | Convertible | ZR1 Wheels
1973 Camaro Z28 | M5 | Blue | 383 SBC | Frame-Off Resto-Mod
1970 Corvette 454 | M4 | Red | Convertible | 454 BBC | Frame-Off Restoration
Can'tHave2MuchHP is offline   Reply With Quote
Old 05-07-2018, 05:02 PM   #24
RobZL1
fo'shizZL1
 
RobZL1's Avatar
 
Drives: 2014 ZL1
Join Date: Aug 2017
Location: ATL
Posts: 225
Quote:
Originally Posted by Can'tHave2MuchHP View Post
Or is it Slippin' Ain't Winnin' in this case?
I'll meet you halfway with Slippin' It Ain't Whippin' It
__________________
2014 Red Hot #1503 | 629 SAE | RotoFab | 28% OD | 1-7/8 LT's | JMS BAP | ID850 | TR7IX | MSD Wires | Monster LT1-S Triple |
RobZL1 is offline   Reply With Quote
Old 05-08-2018, 07:41 AM   #25
JANNETTYRACING

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 13,935
Quote:
Originally Posted by RobZL1 View Post
Spinnin' ain't winnin'.
Quote:
Originally Posted by Can'tHave2MuchHP View Post
Or is it Slippin' Ain't Winnin' in this case?
Quote:
Originally Posted by RobZL1 View Post
I'll meet you halfway with Slippin' It Ain't Whippin' It
Good stuff here LOL.
__________________
www.jreperformanceparts.com
Celebrating 32 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705
JANNETTYRACING is offline   Reply With Quote
Old 05-08-2018, 01:38 PM   #26
d454brisson
 
Drives: jeep
Join Date: Jul 2016
Location: md
Posts: 226
I tried to get the back supercharger bolts off but could never get to the last 2 without drilling.

Some will hate this but I had just enough clearance (with a little prying force) to slide the snout out.
I cleaned and clearanced the area that would rub with a file and grinder (top under hat, cannot be seen and lower portion of snout plenty of sealing area left) and now can Remove / Replace the snout without loosening the intake bolts.
The crankcase vent tube bent a little and had to be straightened but once clearanced its pretty easy now to get the snout off for bearing changes, porting, swaps etc.
d454brisson is offline   Reply With Quote
Old 05-08-2018, 03:05 PM   #27
silversleeper
Some ol' dude
 
silversleeper's Avatar
 
Drives: '13 ZL1
Join Date: Mar 2017
Location: California
Posts: 527
Quote:
Originally Posted by d454brisson View Post
I tried to get the back supercharger bolts off but could never get to the last 2 without drilling.

Some will hate this but I had just enough clearance (with a little prying force) to slide the snout out.
I cleaned and clearanced the area that would rub with a file and grinder (top under hat, cannot be seen and lower portion of snout plenty of sealing area left) and now can Remove / Replace the snout without loosening the intake bolts.
The crankcase vent tube bent a little and had to be straightened but once clearanced its pretty easy now to get the snout off for bearing changes, porting, swaps etc.
I can't envision where you are talking about grinding. I already ground some on mine to get the front fuel rail bolt off. If it doesn't look too bad or affect reliability and it's not a perfect original show car why not. Could you post a pic of what you did?
silversleeper is offline   Reply With Quote
 
Reply

Thread Tools

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 -5. The time now is 03:08 AM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.