Today I went to stillen day and I got my car dynoed and it put down 257.1 as the max HP. I was amazed. I have nothing but the Stillen Hi Flow and the Z-tube on my car as far as performance mods go. Some of the guys there couldnot get higher than 250 with pullies exhaust intake etc... I think my SCGOA sticker added like 10HP though [img]/w3timages/icons/wink.gif[/img]

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03 CB Coupe 6MT
www.itclan.com/g35


271067-rob dyno good copy.jpg

 

<blockquote><font class="small">In reply to:</font><hr>

Wow, that's awesome. I'm assuming I should multiply the 257.1 by 1.15 (15% loss of power at the drivetrain) to get crank hp, right? That comes out to 295hp, pretty impressive !!!

<hr></blockquote>Isn't 295hp kinda low for that much rwhp?

I think I've seen stock cars putting down as much as 230rwhp. Assuming they had 280 at the crank, that's a multiplier of 1.22 which would make his crank hp closer to 314hp which is even MORE impressive!

04, TB/W, Nav, Aero, 6MT, Z-tube/ZWT, etc...

 

...or you could just multiply 280 x .85 and get there one step faster [img]/w3timages/icons/tongue.gif[/img] But yes- freak from the factory. Impressive numbers, man

G

2003.5 Black w/ Willow G35
Premium / Sport / Aero / Winter / Navi / Tint
<font color=blue>Z-tube, Pop-charger, Borla True-Dual Exhaust, Eibach Pro Kit, GroundingGear</font color=blue>

 

The G35 loses more than 15% power. Isn't the average RWHP about 233 or so... Which equates to about 83% HP transferred from the crank. Which would be the reason that you might think his BHP numbers should be more. 257rwhp. WOW.

Black / Black 2004 GcoupeMT. Premium. Splash Guardz.

 

Now... for an explanation... tuning, ecu... I really wonder. I'm sure all the internals are the same.

 

Mr. E, we're saying the same thing.

I just figured that the driveline LOSS is probably closer to 18% (based on a stock car's numbers). To get back to the original number I had to ADD 22%. I don't add 18% of 257 (because that's LESS than 18% of the original number).



For instance a 15% loss requires you to add 17.5% to get back to the original number. If the car had 295hp at the crank and had a 15% LOSS the rwhp would only be 250.75
(295 minus 15% driveline loss = 295*.85= 250.75rwhp)

If the driveline loss is 15% his hp should really be 302 at the crank:
302*.85 = 257

To get back to the crank hp you needed to add 17.5%:
257*1.175=302

04, TB/W, Nav, Aero, 6MT, Z-tube/ZWT, etc...

 

Just as I have been saying for years: Caribbean Blue coupes are faster than other colors period. This dyno result is just another piece of evidence.

 

<blockquote><font class="small">In reply to:</font><hr>

For instance a 15% loss requires you to add 17.5% to get back to the original number. If the car had 295 hp at the crank and had a 15% LOSS the rwhp would only be 250.75
(295 minus 15% driveline loss = 295*.85= 250.75rwhp)

If the driveline loss is 15% his hp should really be 302 at the crank:
302*.85 = 257

To get back to the crank hp you needed to add 17.5%:
257*1.175=302

<hr></blockquote>

Just to make this a little easier... Typically you know the car is rated at 280 bhp and you know you dynoed 257.1 rwhp. What you really need is a stock G35 (same tranny type) to dyno on the SAME day on the SAME dyno and take their measurement of "rwhp" and determine whether or not you actually have a 15% drive train loss or more.

To turn the dyno horsepower number back into crank horsepower do the following...
257.1 / (1 - 0.15) = 302.5 bhp

thus a 15% loss due to the drive train would be...
302.5 - (302.5 * 0.15) = 257.1 rwhp

Without the stock car for comparison I keep thinking something is wrong. 15% drive train on our cars is a bit low (especially since this engine and transmission is used on multiple platforms and was not designed solely for the G35), this would only INCREASE YOUR horsepower at the crank and from the numbers you've posted I can only say that either you're a VERY lucky person, or something is a little off. None the less, I'd be happy with those numbers if I were you, congratulations! [img]/w3timages/icons/smile.gif[/img].

FYI, with an 18% loss you'd be at 313.6 bhp which seems a bit high. That would be a 33.6 hp gain on a NA platform just from a "Stillen High Flow" and a "Z-Tube".

This leaves me asking... What exactly is a "Stillen High Flow" and where can I get one? [img]/w3timages/icons/wink.gif[/img]

301-bhp!!! ...and growing!

 

Those are very good numbers. Do you know what gear the car was dynoed in?

 

Thanks for the comments guys. The car was dynoed in 5th gear.


And Yes CB is the fastest color.

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03 CB Coupe 6MT
www.itclan.com/g35

 

did you break in the car, or just drive it like nuts from the get go??? Who knows it might have something to d with your numbers

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I hit the rev limiter at 800 miles. I hit redline regularly at 400+ miles and I think thats the reason my car puts these kinds of numbers down.

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03 CB Coupe 6MT
www.itclan.com/g35

 

I'd like to see the same car put on a second dyno, just for ***** and giggles. I really doubt the same numbers would come up again... but you never know!