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
SVT Shelby GT500
2010 Dyno numbers - somewhat disappointed
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="XP900" data-source="post: 16528560" data-attributes="member: 199546"><p>Thanks,</p><p> I noticed that too and expected a maximum boost of about 17lbs based on what VMP recommends and my height above sea level. That's why I went with the 2.5 pulley on stock crank. I think two things may account for the higher boost. The day of the dyno it was probably between 45 and 50 degrees outside when he started his runs and they keep their garage doors open during many of their dyno tests from what I saw in the past. I think the cooler air dense outside and in the dyno area may cause a slight increase in the overall boost displayed by the dyno. I asked about that before and was told he accounts for that during his tuning process. The second thing that may be increasing the boost is the back pressure in the exhaust like you suggested. I read that this usually shows up as a bump up in the very high rpm levels which is what I see right before it reaches the 6000 mark. I think that bump up is my exhaust pressure but I am guessing. That's why I considering looking for the 13/14 and 11 exhaust pieces to swap out but keep my car somewhat quiet.</p></blockquote><p></p>
[QUOTE="XP900, post: 16528560, member: 199546"] Thanks, I noticed that too and expected a maximum boost of about 17lbs based on what VMP recommends and my height above sea level. That's why I went with the 2.5 pulley on stock crank. I think two things may account for the higher boost. The day of the dyno it was probably between 45 and 50 degrees outside when he started his runs and they keep their garage doors open during many of their dyno tests from what I saw in the past. I think the cooler air dense outside and in the dyno area may cause a slight increase in the overall boost displayed by the dyno. I asked about that before and was told he accounts for that during his tuning process. The second thing that may be increasing the boost is the back pressure in the exhaust like you suggested. I read that this usually shows up as a bump up in the very high rpm levels which is what I see right before it reaches the 6000 mark. I think that bump up is my exhaust pressure but I am guessing. That's why I considering looking for the 13/14 and 11 exhaust pieces to swap out but keep my car somewhat quiet. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
SVT Shelby GT500
2010 Dyno numbers - somewhat disappointed
Top