Sabregl Posted January 18, 2010 Report Share Posted January 18, 2010 Has anybody had their car on a dyno to determine the true RWHP of these cars? I also see that SAI has these cars rated @ 725hp and 750hp? I will be calling them shortly to question this but I thought I would see if any members out there had their own dynos done. Thanks. Link to comment Share on other sites More sharing options...
blkGT500nCA Posted January 18, 2010 Report Share Posted January 18, 2010 725 version = apx. 630-650 RWHP 605 version = apx 550ish RWHP Link to comment Share on other sites More sharing options...
Lee N. Posted January 18, 2010 Report Share Posted January 18, 2010 Has anybody had their car on a dyno to determine the true RWHP of these cars? I also see that SAI has these cars rated @ 725hp and 750hp? I will be calling them shortly to question this but I thought I would see if any members out there had their own dynos done. Thanks. I did not dyno mine before I modded it, but there are several that have. Seems like the numbers are pretty accurate for crank HP. Most are comming between 590-630. There can be a pretty noticible difference depending on the dyno thats used and the weather. Link to comment Share on other sites More sharing options...
dbackg Posted January 19, 2010 Report Share Posted January 19, 2010 Has anybody had their car on a dyno to determine the true RWHP of these cars? I also see that SAI has these cars rated @ 725hp and 750hp? I will be calling them shortly to question this but I thought I would see if any members out there had their own dynos done. Thanks. 725 is the OLD original tune. 750 is the NEW tune after 9-1-2010 FRPP SC TVS tune and verts. 605 is the OLD original tune 630 is the NEW tune after 9-1-2010 The parasitic HP loss is approx 15% through the driveline, less on the one-piece aluminum drive shaft. Additional considerations are, atmospheric conditions, temperature, altitude, etc. Also, the all dyno machines/computers are NOT the same. Good luck with this topic. Link to comment Share on other sites More sharing options...
mrdci Posted January 19, 2010 Report Share Posted January 19, 2010 Is that Sep 2009 or Jan 2010. Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted January 19, 2010 Report Share Posted January 19, 2010 Is that Sep 2009 or Jan 2010. That depends on if you're in the Military or a Civilian! lol I'm pretty sure that's Sept. 2009. At least that's about when the Ford Racing site changed their specs. to the newer/higher numbers. I also noticed that they have just recently changed the photo's of the FRP mufflers on their site. They finally show the "quiet" versions as the big ovals and the "loud" versions as the round ones. HTH, Phill Pollard Link to comment Share on other sites More sharing options...
Robert M Posted January 20, 2010 Report Share Posted January 20, 2010 Has anybody had their car on a dyno to determine the true RWHP of these cars? I also see that SAI has these cars rated @ 725hp and 750hp? I will be calling them shortly to question this but I thought I would see if any members out there had their own dynos done. Thanks. Some of the owners who had 2007/08's and opt'ed for the 725 KB Super Snake were dyno'ing 634-637 rwhp and I remember one 643 quote. Motor Trend recently dyno'ed a 2010 Super Snake with the Ford Racing 750 horse S/C and got 635 rwhp. R Link to comment Share on other sites More sharing options...
Curt A Posted January 20, 2010 Report Share Posted January 20, 2010 Has anybody had their car on a dyno to determine the true RWHP of these cars? I also see that SAI has these cars rated @ 725hp and 750hp? I will be calling them shortly to question this but I thought I would see if any members out there had their own dynos done. Thanks. With a KB S3, 3 " pulley and a tune from John Lund for pump gas [93] you can easily hit high 680's rwhp The factory tune is 50 state friendly . http://kennebell.net/superchargers/ford/Shelby/Shelby.htm Link to comment Share on other sites More sharing options...
08SHELBYSS Posted January 21, 2010 Report Share Posted January 21, 2010 Mine came in at 622.9 rwhp Link to comment Share on other sites More sharing options...
Robert OHara Posted January 21, 2010 Report Share Posted January 21, 2010 Last dyno, 3 in pulley, 93 pump gas 709 rwhp 630 torque Link to comment Share on other sites More sharing options...
Sabregl Posted January 21, 2010 Author Report Share Posted January 21, 2010 Last dyno, 3 in pulley, 93 pump gas 709 rwhp 630 torque That's amazing HP! Are there any issues that need to be addressed when changing to a 3" pulley? Does the car need to be retuned or is it just simply r+r the pulley? Also is the original 725HP pulley 3-1/2" diameter? Thanks. Link to comment Share on other sites More sharing options...
Robert OHara Posted January 21, 2010 Report Share Posted January 21, 2010 That's amazing HP! Are there any issues that need to be addressed when changing to a 3" pulley? Does the car need to be retuned or is it just simply r+r the pulley? Also is the original 725HP pulley 3-1/2" diameter? Thanks. I have the KB tune from SAI install, tune is good for 3 1/4, and 3 inch pulley. Have to run 93 octane with the 3 inch. Yes, the 3 1/4 is the stock SS pulley Bob Link to comment Share on other sites More sharing options...
Sabregl Posted January 21, 2010 Author Report Share Posted January 21, 2010 I have the KB tune from SAI install, tune is good for 3 1/4, and 3 inch pulley. Have to run 93 octane with the 3 inch. Yes, the 3 1/4 is the stock SS pulley Bob Thanks Bob Have you considered going to even a smaller pulley and running race gas or is the risk and headache not worth the gains? I would expect that you have to retune to do this is that correct? Gregg Link to comment Share on other sites More sharing options...
Robert OHara Posted January 22, 2010 Report Share Posted January 22, 2010 I can run a 2 7/8 pulley with the same tune , but does require race fuel. Maybe try that at the track in the future, but that will require buying some new rear grip Link to comment Share on other sites More sharing options...
pucky Posted January 28, 2010 Report Share Posted January 28, 2010 HI MY 2010 GT500 WITH KENNE BELL STAGE 3 WITH 3 IN PULLEY AND 93 OCTANE DYNO AT 686 RWHP BACK IN THE LATE FALL ALSO I HAVE THE 3 1/4 PULLEY WITH NO RETUNE REQUIRED Link to comment Share on other sites More sharing options...
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