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Discussion Starter #1
15 RW HP.

HERE IS THE BOTTOM LINE: THE AIR INDUCTION SYSTEM AND THE EXHAUST SYSTEM ON THE 2003 VIPER SRT10 BOTH BREATHE VERY WELL. THEY BREATHE MUCH BETTER THAN THE PREVIOUS GEN 1 & GEN 2 MOTORS THAT WOULD BOTH EASILY GAIN 15 RW HP FROM A GOOD AIR INDUCTION SYSTEM AND 15 RW HP FOR A GEN 2 EXHAUST OR UP TO 30 RW HP FOR A GEN 1 CATBACK.

SO AFTER WORKING HARD ON JOHN MYRICKS 2003 VIPER SRT10 FOR THE LAST 2 DAYS, I AM PRETTY PLEASED WITH A 15 RW HP GAIN. AND I FEEL THAT THIS IS ABOUT THE TOTAL UPSIDE ON THIS CAR FOR AN AIR INDUCTION AND CATBACK EXHAUST UPGRADE. WILL POST DYNO SHEETS LATER WHEN I GET A CHANCE.

HERE IS A VIDEO CLIP OF THE SRT10 ON THE DYNO - IT SOUNDS PRETTY GOOD:

http://www.hennesseyperformance.com/hennesseyperformance/Cool_Mpegs.php?cart=KPgvcNWW

HEADERS ARE NEXT. THERE IS NO FREE OR EASY HP TO BE GAINED ON THE GEN 3 THUS FAR.
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John Hennessey
www.HennesseyPerformance.com
Venom 1000 Twin Turbo (9.52 @ 156.46)
Venom Twin Turbo (1087 rw hp)
 

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Discussion Starter #2
HERE IS THE ENTIRE STOCK EXHAUST SYSTEM REMOVED FROM THE CAR:

http://www.hennesseyperformance.com/hennesseyperformance/images/Pic3.php?id=36

THE BENDS ARE ALL NICE 2.5 IN. MANDREL BENT STAINLESS. THE TOTAL WEIGHT FOR THE STOCK SYSTEM AFT OF THE CATS IS 59 LBS. I DONT HAVE A FINAL PRODUCTION WEIGHT FOR OUR SRT CATBACK EXHAUST UPGRADE, BUT I WILL ESTIMATE IT AT ABOUT HALF THAT. SO A NET WEIGHT SAVINGS OF ABOUT 30 LBS. IN ADDITION TO A POWER GAIN OF ABOUT 10 RW HP.

ALSO, THE AIR INDUCTION UPGRADE SEEMED TO WORK BETTER WITH THE EXHAUST UPGRADE, RATHER THAN JUST BY ITSELF.
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John Hennessey
www.HennesseyPerformance.com
Venom 1000 Twin Turbo (9.52 @ 156.46)
Venom Twin Turbo (1087 rw hp)
 

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god damn that car sounds nice
 

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Discussion Starter #5
Jerome, we tested straight out the side. Wanted to get a best case, lowest restriction case possible, with stock cats in place. Certainly there are a number of exhaust design possibilities. But at this point, keeping stock cats in place, any mod aft of the cat will only have a total upside of 10 rw hp. Any other kind of design changes would have a greater effect on exhaust sound rather than power gained.

John
 
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