What Is Your Car's Power To Weight Ratio?

"Chris Clarke" (shiftsandgiggles) 05/23/2014 at 12:58 • Filed to: None

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Please only respond if you've confirmed WHP on a dyno or have a WAG.

My B5 S4 is 10 lbs/HP

macanamera > Chris Clarke 05/23/2014 at 13:06

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8.2 lb/hp

sm70- why not Duesenberg? > Chris Clarke 05/23/2014 at 13:09

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17lbs/hp

For Sweden > Chris Clarke 05/23/2014 at 13:09

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I'll get back to you when I put my non-turbo S80 on the dyno.

HammerheadFistpunch > Chris Clarke 05/23/2014 at 13:09

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really? dyno'd numbers only?

rad_mike > Chris Clarke 05/23/2014 at 13:13

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My S60R is around 10lb/HP, as well.

ab124 > Chris Clarke 05/23/2014 at 13:18

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You said power:weight so did you mean HP/lbs not lbs/HP?

2011 infiniti G37x: 11 HP/lbs (220 HP/ton)

ESSSIX GmbH - Accountant/Wagon Thumper > Chris Clarke 05/23/2014 at 13:18

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3,234lbs/345awhp = 9.37

B5 s4 Avant. Pic below, cause audi bro..

Philbert/Phartnagle > Chris Clarke 05/23/2014 at 13:36

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Ok, where are the dyno sheets since you asked for only "confirmed" numbers?

Or, is "WAG" a Wild Ass Guess?

Chris Clarke > HammerheadFistpunch 05/23/2014 at 13:49

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Or a WAG (Wild Ass Guess). That's what I used.

Chris Clarke > ESSSIX GmbH - Accountant/Wagon Thumper 05/23/2014 at 13:50

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Where'd you get 3234? I have a sedan and was going with 3600, but I only checked the first result from google.

Chris Clarke > Philbert/Phartnagle 05/23/2014 at 13:51

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Yes. WAG = Wild Ass Guess. that's what I used.

briannutter1 > Chris Clarke 05/23/2014 at 13:56

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3125/450whp=6.94. Factoring a typical 12% loss on a dynojet, 450 becomes 504 and the new 3125/504= something close to 6.2

Philbert/Phartnagle > Chris Clarke 05/23/2014 at 14:01

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Ok, thanks for clarifying that.

3075/385 = 7.98

stoke > Chris Clarke 05/23/2014 at 14:52

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Stock 2.5RS was 2,840 lbs. Mine has an EJ205 swap which adds about 100 lbs, so we'll call it 3,000 even.

3000/237whp on the old turbo (TD04) puts me at 12.65:1.

New turbo should kick it up to about 300 at the wheels, so 10:1.

Chris Clarke > stoke 05/23/2014 at 14:53

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Nice!

Axial > Chris Clarke 05/23/2014 at 16:01

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Stock LT4 puts down about 300 RWHP. The car wet and with a full tank is about 3300 lbs.

Thus, W/HP is about 11 lbs/HP.

It should be noted that LT4 outputs have some pretty wild variances, ranging between 320 to 370 crank HP against the factory rating of 330; reportedly, most fall in around 345. My car also carries no options at all apart from the LT4/ZF6 combo, so it might weigh in a bit under the 3300 lb. reference.

ESSSIX GmbH - Accountant/Wagon Thumper > Chris Clarke 05/23/2014 at 16:17

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Haha, I went with the first post with an answer here

Chris Clarke > ESSSIX GmbH - Accountant/Wagon Thumper 05/23/2014 at 17:15

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That's funny. I read through that thread. Not exactly a consensus established on the weight. I did find the spec sheet.

http://www.audiworld.com/model/s4/conte…

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Renescent > Chris Clarke 05/23/2014 at 18:43

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C55 AMG - 3540/362 = 9.8 lbs/HP

ESSSIX GmbH - Accountant/Wagon Thumper > Chris Clarke 05/27/2014 at 09:21

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Yea that sounds more like it, and I keep a full 18" spare in the rear too.

Vikings-230 > Chris Clarke 06/14/2014 at 01:18

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35.52 lb/hp in my 79 MGB