Whipple 4.0 L in!

[Wwabbit]

How's that mono blade TB treating you? Any sticking?

 

[FBA]

Smooth as glass; no sticking.

 

[Fubar]

That sounds like a lot of power without added fuel. I am not concerned about your tune. I am sure Torrie did his job but you might be careful when running about GT in similar a power range. Don't surprised if the results are "not as expected".

This statement from the Dyno guy is what got me. If he has added a 20% for drivetrain to the computer calculation, then he is calculating engine power, not wheel power (otherwise there is no need to add or subtract drivetrain power).

I can only say that with runs of 728-735 HP with a good looking AFR...(and the Dyno guy is saying he has calculated a 20% drivetrain loss on his Dyno, not 15%)

If he is adding 20% for drivetrain loss, then it is a miscalculation. The GT only sees about 11%-12%. It's just a thought? The best test is the "seat of your pants" calculation.... go with that and have fun!

 

[FBA]

The drivetrain loss is an SOP number and is not used in any actual calculation or dyno setup. Drivetrain loss is also subjective and obviously depends on the Dyno being used. These results (781.3 RWHP) are what shows on the Dyno after SAE correction. There's no input for crank HP; that's only what the Dyno guy estimates from past experience while Dyno'ing stock engines. SOP dyno - she pulls very hard throughout the entire range. No question, much, much faster and harder than my SRT10 or my Z06. These RWHP numbers are about what one would expect with the 4 liter Supercharger @ 19 PSI. I have seen similar results from the 3.4 posted here. A Dynojet Dyno would read higher RW numbers than this chassis Dyno, since Dynojets are known to be somewhat less conservative. In any case...even if it is only an 11-12% loss, that would still be in the 850-860 crank HP range. My baseline with a pulley/tune and exhaust was in the 560 RW range. Many I have seen with the same setup are in the 610 range. Yesterday, in total, we picked up over 200 RWHP over the baseline. That part is indisputable.

 

[Fracman]

Congrats on the awesome numbers! I'm sure you will enjoy your "transformed" machine even more than its original form.

 

[paul b]

What spark plugs are you using?

 

[FBA]

NGK - but don't remember which ones...maybe 4177's?

 

[Fast Freddy]

^^^^ - TR7's

 

[FBA]

Congrats on the awesome numbers! I'm sure you will enjoy your "transformed" machine even more than its original form.

I am - immensely! She feels closer to my Ninja ZX14 than to my other cars now....and though I know she really couldn't hold a candle to the ZX14, she'd definitely make minced meat out of the European exotics...and she'll walk my Concours 14 as well, which is one of the fastest big block Sport touring bikes around today. She runs circles around my SRT10, which is no slow ride either...

 

[Fubar]

I raced a few liter bikes with the 4.0L and put a hurt'n on 'em. I'm sure they were very stock bikes but I loved with watch the rider glance over his shoulder, just in time for me to slide past his "ultimate street machine". Its pure satisfaction, doing that with a 3400lbs car.

 

[BlackICE]

I raced a few liter bikes with the 4.0L and put a hurt'n on 'em. I'm sure they were very stock bikes but I loved with watch the rider glance over his shoulder, just in time for me to slide past his "ultimate street machine". Its pure satisfaction, doing that with a 3400lbs car.

You must of been well past triple digits before passing them in Mexico. :biggrin

 

[FBA]

Absolutely - my ZX14 would murder my 4.0L...till about 170, then bye bye ZX14...even my ZX10 would eat my GT.