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      05-22-2020, 07:47 PM   #14
BEAR-AvHistory
2020 Z4 M40i - 2022 M4C Convt
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Drives: 2020 Z4 M40i - 2022 M4C Convrt
Join Date: Jun 2011
Location: Raleigh, NC - OIB, NC

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Quote:
Originally Posted by DPelletier View Post
HP still matters. Actual dyno of the M40i shows torque at 381....at the rear wheels https://g29.bimmerpost.com/forums/sh....php?t=1657836 Running all the numbers through a drag calculator with a 200lb weight difference shows the stock 30i at 13.7@104.5, a tuned 30i at 13.05@105.8 and the stock M40i at 12.21@117mph.....a quick google search verifies that these numbers are pretty accurate; Car and Driver has the M40i at 12.3@116mph and the 30i at 13.8@102mph. I'm sure there's a tight track somewhere where the weight advantage of a modded 30i would put it on equal or better ground than a stock M40i but if you think it will be as quick on the street or most any performance comparison, I think you'll find you're mistaken. You asked the question, that's my answer based on what info is available.

2 cents,
Dave
Yeah, the 1/4 mile speed says it all about the cars available power. Personally not a fan of Dinan. Never liked the fact they were advertising Crank while everybody else in the industry was advertising wheel horsepower. The adds gave them an unattainable in real life advantage over every body else. Joke was its a good warranty with a crappy tune.

Back when I was running just a JB4 & FMIC in my 335is an identical car was running the full boat level III Dinan package. We are both listed on the same Drag Times page back to back listing 204 & 205.

JB4 12.583 @ 114.529 About $700
Dinan 12.590 @ 108.740 About $2500/3000

One of the really dumb pieces of engineering on the 335is was to install the Dinan cool air package you have to remove the secondary water radiator from the car. Most recognize that BMW's are built with a cool air intake so dropping a functional radiator to install a noise maker intake really made no sense to me.

FWIW would buy the most powerful base in the line up to build on. Never regretted one single cent I spent over the years & especially don't regret getting a M40i vs a 30i Z4.
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2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT

Last edited by BEAR-AvHistory; 05-22-2020 at 07:58 PM..
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