635 RW HP ALL MOTOR VIPER SRT10

**John Hennessey** · May 18th, 2005, 11:32 AM

Here is the dyno sheet.

diabolos88 · May 18th, 2005, 11:41 AM

$$$$??

JGK95 · May 18th, 2005, 11:44 AM

Now THAT IS AWESOME!!

John,

Whats the most you've ever done for a Gen II?

BigCarrot · May 18th, 2005, 11:45 AM

DAMN!!!!

Anthony - 98 GTS · May 18th, 2005, 11:54 AM

Quote:

Originally Posted by JGK95

Now THAT IS AWESOME!!

John,

Whats the most you've ever done for a Gen II?

Last time I dynoed all motor - 649 RWHP. We have since done a little more head work and expect around 660 RWHP.

DJ Self · May 18th, 2005, 12:09 PM

Yes, That is awesome. :thumb:

Cody@A.R.T. · May 18th, 2005, 01:10 PM

That's awesome John

HIBOOST · May 18th, 2005, 04:44 PM

SWEET!!

JGK95 · May 18th, 2005, 05:05 PM

Quote:

Originally Posted by Anthony - 98 GTS

Last time I dynoed all motor - 649 RWHP. We have since done a little more head work and expect around 660 RWHP.

Anthony,

You Sir, Have my Respect!! I've always believed that the Viper V-10 was more than capable of 600+ NA. I looked at Ford's V-10 that was hitting over 600+ with race gas and was in disbelief that they could hit the figure and Dodge Couldn't.

Thank you.

BTW, would you list what you've done? Hardened internals? Head work machining on the outflow? Manley and Oliver components?

Thanks,

Jay K.

Martin D · May 18th, 2005, 06:55 PM

My Venom also makes 650/650 on motor.... Just a bit more area under the curve than the graph John has posted.

Regards,

SylvanSRT · May 18th, 2005, 07:18 PM

to repeat the question $$$$$ ???

**TX WHOS YOUR DADDY** · May 18th, 2005, 09:52 PM

Quote:

Originally Posted by John Hennessey

Here is the dyno sheet.

BIG BREEZE... GREAT NUMBERS!FROM THE LOOKS OF THE DYNO SHEET IT APPEARS U ARE RUNNING A STOCK COMPUTER AND MAYBE JUST A VERY SMALL BIT ON THE RICH SIDE.IF THAT IS THE CASE YOU HAVE A FEW MORE HORSES TO BE GAINED. WHAT IS YOUR A/F RATIO?

**TX WHOS YOUR DADDY** · May 18th, 2005, 09:54 PM

Quote:

Originally Posted by Anthony - 98 GTS

Last time I dynoed all motor - 649 RWHP. We have since done a little more head work and expect around 660 RWHP.

KEEP US INFORMED!GO ANTHONY! :thumb:

GARY J · May 19th, 2005, 10:07 AM

Those are a couple of badass all motor cars for sure...

**KRAZYPSI** · May 19th, 2005, 10:17 AM

Quote:

Originally Posted by GARY JAVO

Those are a couple of badass all motor cars for sure...

I'd say!!!

:thumb:
-------------------------------------------------------------------------------
2003 SRT-HEFFNER TWINTURBO "1040RWHP&1135RWTQ"
1999 DIABLO VT-HEFFNER TWIN SUPERCHARGED "620hp&740tq"
2005 MERCEDES CL65-HEFFNER MODIFIED&TUNED "650HP&830TQ"
2005 MURCIELAGO HEFFNER TWINTURBO(SOON TO BE ANNOUNCED)
2005 AUDI A8 (STOCK WITH THE EXCEPTION OF 20INCH HRE'S)
2006 RANGE ROVER SUPERCHARGED
1970 CUDA (VIPER MOTOR,BAER BRAKES,RECAROS,20INCH WHEELS,COILOVERS)
2006 MERCEDES CLS55

snkbite97 · May 19th, 2005, 12:14 PM

I still dont see a response to the ? of costs? And what mods were done to achieve those sweet #'s

DDIGGLER · May 19th, 2005, 12:21 PM

Great work John. As if we didn't already know who the king of Vipers was.

**John Hennessey** · May 19th, 2005, 12:27 PM

Quote:

Originally Posted by snkbite97

I still dont see a response to the ? of costs? And what mods were done to achieve those sweet #'s

Here is what the package includes, test numbers at the track on street tires and cost:

http://www.hennesseyperformance.com/...ctionReq=Where

JGK95 · May 19th, 2005, 01:18 PM

I can't believe that MOTOR Trend was That Nice to a American Car, much less the Viper!!

Okay John, Who'd you pay off!

Congrats on the Amazing work.

Jay K.

blk04cobra1 · May 19th, 2005, 06:18 PM

that's awesome work...congrats...only thing I dont understand is why someone would wanna do that when they could spend about $15k more and get 1000rwhp? $15k and 400 more rwhp sounds like a good idea to me