Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Cobra Forums
The Terminator
Engine/Tuning
RR 2.65" upper puley w/ factory lower (w/ pics and dyno sheet)
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="myslowstang" data-source="post: 12083568" data-attributes="member: 112091"><p>When I was trying to figure out which pulley to go with it was hard for me to find info on using the 2.65" upper pulley. Many people told me not use the 2.65" because of belt slip but I've come to find out that the GT500 guys are using pulleys smaller then the 2.65" so I decided to give the 2.65" a try.</p><p></p><p>Here's what I found... I have very little, if any belt slip. I'm used a 100mm auxiliary idler, which you have to remove to put on/off the belt due to the high side wall of the RR 2.65" pulley. I used a Napa belt (part # 080740), I believe it's a 74 5/8”. The car made 14.41#s of boost. I have LT headers so I may have lost a little boost but I wouldn't think it'd be much. I'd guess that if I had the factory headers that I may have hit 15#s.</p><p></p><p>Here is a list of my mods so you guys know what I had and the results I got.</p><p></p><p><u>MODS</u></p><p>Posi Performance race port (on factory Eaton blower)</p><p>2.65" upper pulley (factory lower)</p><p>Accufab single blade throttle body and plenum</p><p>JLT 12" high boost cold air intake (new version)</p><p>SCT BA-3000 MAF with 105mm housing </p><p>60 LB injectors (from Sieman Deka)</p><p>BAP </p><p>MAC long tube headers</p><p>MAC off-road H-pipe</p><p>MAC 3" catback </p><p>ECG delete</p><p>BilletFlow 100mm idler pulley</p><p>Napa belt (part # 080740)</p><p></p><p></p><p>Cobra made</p><p>518rwhp</p><p>497rwtq</p><p>14#s of boost</p><p></p><p></p><p>Here are a few pics to show fitment</p><p></p><p>[ATTACH=full]357278[/ATTACH]</p><p></p><p>[ATTACH=full]357279[/ATTACH]</p><p></p><p>[ATTACH=full]357280[/ATTACH]</p><p></p><p>[ATTACH=full]357281[/ATTACH]</p><p></p><p>[ATTACH=full]357282[/ATTACH]</p><p></p><p></p><p><u>DYNO</u></p><p></p><p>[ATTACH=full]357283[/ATTACH]</p><p></p><p>Tuned by HBH</p></blockquote><p></p>
[QUOTE="myslowstang, post: 12083568, member: 112091"] When I was trying to figure out which pulley to go with it was hard for me to find info on using the 2.65" upper pulley. Many people told me not use the 2.65" because of belt slip but I've come to find out that the GT500 guys are using pulleys smaller then the 2.65" so I decided to give the 2.65" a try. Here's what I found... I have very little, if any belt slip. I'm used a 100mm auxiliary idler, which you have to remove to put on/off the belt due to the high side wall of the RR 2.65" pulley. I used a Napa belt (part # 080740), I believe it's a 74 5/8”. The car made 14.41#s of boost. I have LT headers so I may have lost a little boost but I wouldn't think it'd be much. I'd guess that if I had the factory headers that I may have hit 15#s. Here is a list of my mods so you guys know what I had and the results I got. [U]MODS[/U] Posi Performance race port (on factory Eaton blower) 2.65" upper pulley (factory lower) Accufab single blade throttle body and plenum JLT 12" high boost cold air intake (new version) SCT BA-3000 MAF with 105mm housing 60 LB injectors (from Sieman Deka) BAP MAC long tube headers MAC off-road H-pipe MAC 3" catback ECG delete BilletFlow 100mm idler pulley Napa belt (part # 080740) Cobra made 518rwhp 497rwtq 14#s of boost Here are a few pics to show fitment [ATTACH=full]357278[/ATTACH] [ATTACH=full]357279[/ATTACH] [ATTACH=full]357280[/ATTACH] [ATTACH=full]357281[/ATTACH] [ATTACH=full]357282[/ATTACH] [U]DYNO[/U] [ATTACH=full]357283[/ATTACH] Tuned by HBH [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
The Terminator
Engine/Tuning
RR 2.65" upper puley w/ factory lower (w/ pics and dyno sheet)
Top