M4 JB4 Vs. 14' Gt 302mani and C7

M5Rlz · 08-10-2014, 03:08 PM

Quote:

Originally Posted by Blaizon

Also don't forget for ~every 100lbs of weight equals roughly 10hp. So, let us continue bench racing

With a mild tune adding ~50whp, you could almost subtract 30+ hp, due to the added weight of the passengers alone. That's hp from throughout the rev range.

That in itself would lead to a good run with the C7. An easy test would have been to swap passengers. I am sure the M4 would've pulled harder.

Also didn't help it was in 2nd below 35 mph

or so people tell me

Blaizon · 08-10-2014, 03:17 PM

Quote:

Originally Posted by 335iRlz

Also didn't help it was in 2nd below 35 mph

or so people tell me

Yeah, a tad low...unless you brake boost.

spool twice · 08-10-2014, 07:17 PM

agreed, too much bench racing. Seems like all cars got the jump on the M4, and that passenger didnt help the gains with the JB4. Those who drag race on a strip know what a split second slower reaction time does to the outcome at the end of the drag strip (thats how a slower car can get to the finish line first, despite running a slower time than you)

ASAP · 08-10-2014, 07:31 PM

Quote:

Originally Posted by spool twice

agreed, too much bench racing. Seems like all cars got the jump on the M4, and that passenger didnt help the gains with the JB4. Those who drag race on a strip know what a split second slower reaction time does to the outcome at the end of the drag strip (thats how a slower car can get to the finish line first, despite running a slower time than you)

Thats why trap speeds r so important and I hope more start poppin up from owners soon.

M5Rlz · 08-10-2014, 08:31 PM

Quote:

Originally Posted by ASAP

Thats why trap speeds r so important and I hope more start poppin up from owners soon.

I'll get it to the track soon with JB4 on. Rain this week for us.

swamp2 · 08-11-2014, 02:35 AM

At the link below you will find a large relevant list of performance data including quarter mile times and trap for both the M4 and Stingray (and other competitors). Look for the last post with the big list for the most updated results. All results are from magazines. Such results are generally not comparable to results from a drag strip and or with drag radial tires. Yes traps less affected than times by traction issues.

Also, from what I have heard the Stingray Automatic 1/4 mile performance is significantly better than the MT. However, I don't have any non-drag strip data from magazines. Any tips to get some of those results added to the list?

That being said the Stingray 7MT and M4 M-DCT seem to be right about neck and neck in the quarter mile. The M-DCT and plateau shaped power curve in the M4 make up nicely for it having less power and more weight.

http://f80.bimmerpost.com/forums/sho....php?t=1009851

Myrder · 08-11-2014, 05:31 PM

That C7 took a solid jump and stopping the pull of the LT1 and pulling back like it did was impressive with an added passenger.

M5Rlz · 08-11-2014, 06:09 PM

Quote:

Originally Posted by Myrder

That C7 took a solid jump and stopping the pull of the LT1 and pulling back like it did was impressive with an added passenger.

lol with a big fatty

230+ with my 187 vs. single driver weighing between 135-150

They'll be one vs. another 335i FBO [probably a tad faster] with e85 and meth later in the week. It was about 1.5-3 cars behind the original 335i with full meth and e85. See if it can't make up some of those car lengths [all the 335i's around us run 11.7s-11.9s.]

turbo8765 · 08-11-2014, 06:44 PM

Quote:

Originally Posted by Blaizon

Also don't forget for ~every 100lbs of weight equals roughly 10hp

Only if the initial p:w ratio is 10:1. The M4 is in the 7's.

ASAP · 08-12-2014, 02:11 PM

Lol a boss 302 is rated 440 crank, an m4 is rated 430.

The boss is about 100lbs heavier... this is a tuned M4 making a supposed extra 50 whp lol.

Crank or wheel hp numbers that m4 isnt making remotely that power.

Blaizon · 08-12-2014, 02:19 PM

Quote:

Originally Posted by turbo8765

Only if the initial p:w ratio is 10:1. The M4 is in the 7's.

It's an estimate, we can both agree the extra weight has an effect on the car though.

M5Rlz · 08-12-2014, 02:28 PM

Quote:

Originally Posted by ASAP

Lol a boss 302 is rated 440 crank, an m4 is rated 430.

The boss is about 100lbs heavier... this is a tuned M4 making a supposed extra 50 whp lol.

Crank or wheel hp numbers that m4 isnt making remotely that power.

Its a GT with boss 302 intake manifold.

He did jump and put about 1.5 cars on him

if that means anything

gmazet · 08-12-2014, 03:15 PM

Quote:

Originally Posted by ///M ARMY

Oh my. Jb4....

JB4 is available for S55? thought it was still in development?

Myrder · 08-12-2014, 03:17 PM

ITT: people who think a car taking a 1/2 car jump doesn't change the outcome of a race.

A car taking an early hit at these power levels makes a huge difference. Honestly I think we are seeing the 40-50rwhp advertised gain. If that M4 would have been stock that C7 would have kept walking away with ease.

M5Rlz · 08-12-2014, 03:18 PM

Quote:

Originally Posted by gmazet

JB4 is available for S55? thought it was still in development?

Thats what this is

testing

gmazet · 08-12-2014, 03:27 PM

Quote:

Originally Posted by 335iRlz

Thats what this is

testing

gotcha.

I expect once it is dialed in it should pull on a stingray pretty well. both are cool cars I'd love to have.

M5Rlz · 08-12-2014, 03:28 PM

Quote:

Originally Posted by gmazet

gotcha.

I expect once it is dialed in it should pull on a stingray pretty well. both are cool cars I'd love to have.

lot of factors in that run, low speed, 2nd gear below 30mph, fatties, spinning tires, 8+ other runs...

We'll keep at it

///M ARMY · 08-12-2014, 04:49 PM

Quote:

Originally Posted by gmazet

JB4 is available for S55? thought it was still in development?

You can actually order it, but they won't ship out until its complete.

http://www.burgertuning.com/M3_M4_M5...nce_Tuner.html

K20A2_S · 08-13-2014, 09:03 AM

Quote:

Originally Posted by 335iRlz

lot of factors in that run, low speed, 2nd gear below 30mph, fatties, spinning tires, 8+ other runs...

We'll keep at it

Plan on hitting the 1/4 track anytime soon for some hard numbers?

M5Rlz · 08-13-2014, 09:34 AM

Quote:

Originally Posted by K20A2_S

Plan on hitting the 1/4 track anytime soon for some hard numbers?

Within the next two weeks I'd say... Maybe weekend if it clears up [future misses is not a fan of the hobbies

]

I will really be shocked if this car isn't in the 11's.

gmazet · 08-14-2014, 09:55 AM

Quote:

Originally Posted by ///M ARMY

You can actually order it, but they won't ship out until its complete.

http://www.burgertuning.com/M3_M4_M5...nce_Tuner.html

What's up with that dyno readout? Power figures are above mfg for stock

ixse · 08-14-2014, 07:44 PM

lol hilarious how people have hard time understanding how fast c7 vette is.. stock m4 would get eaten alive by c7.

08-10-2014, 07:17 PM	#69
spool twice Rainbow Racer 1008 Rep 2,540 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	agreed, too much bench racing. Seems like all cars got the jump on the M4, and that passenger didnt help the gains with the JB4. Those who drag race on a strip know what a split second slower reaction time does to the outcome at the end of the drag strip (thats how a slower car can get to the finish line first, despite running a slower time than you)
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08-11-2014, 02:35 AM	#72
swamp2 Lieutenant General 611 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	At the link below you will find a large relevant list of performance data including quarter mile times and trap for both the M4 and Stingray (and other competitors). Look for the last post with the big list for the most updated results. All results are from magazines. Such results are generally not comparable to results from a drag strip and or with drag radial tires. Yes traps less affected than times by traction issues. Also, from what I have heard the Stingray Automatic 1/4 mile performance is significantly better than the MT. However, I don't have any non-drag strip data from magazines. Any tips to get some of those results added to the list? That being said the Stingray 7MT and M4 M-DCT seem to be right about neck and neck in the quarter mile. The M-DCT and plateau shaped power curve in the M4 make up nicely for it having less power and more weight. http://f80.bimmerpost.com/forums/sho....php?t=1009851 __________________ E92 M3 \| Space Gray on Fox Red \| M-DCT \| CF Roof \| RAC RG63 Wheels \| Brembo 380mm BBK \| \| Vorsteiner Ti Exhaust \| Matte Black Grilles/Side Gills/Rear Emblem/Mirrors \| \| Alekshop Back up Camera \| GP Thunders \| BMW Aluminum Pedals \| Elite Angels \| \| XPEL Full Front Wrap \| Hardwired V1 \| Interior Xenon Light Kit \|
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08-11-2014, 05:31 PM	#73
Myrder Major 162 Rep 1,264 Posts Drives: 2010 E92 335i MSport 6MT LMB Join Date: Apr 2013 Location: WildWest iTrader: (1)	That C7 took a solid jump and stopping the pull of the LT1 and pulling back like it did was impressive with an added passenger. __________________ 2010\|335i\|LMB\|E92\|6MT\|MSport\|Logic7\|335is Clutch\|AE Performance\|BMS\|Walbro\|VRSF 7"\| 149.7mph NFZ AZ 1/2mi 1992\|Pontiac Firebird\|Mild 355ci\|T56\| -I will look on your treasures, gypsy. Is this understood?-
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08-12-2014, 02:11 PM	#76
ASAP Major General 10218 Rep 8,650 Posts Drives: '23 X3 M40i Join Date: Sep 2012 Location: FL iTrader: (0)	Lol a boss 302 is rated 440 crank, an m4 is rated 430. The boss is about 100lbs heavier... this is a tuned M4 making a supposed extra 50 whp lol. Crank or wheel hp numbers that m4 isnt making remotely that power. __________________ 2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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08-12-2014, 03:17 PM	#80
Myrder Major 162 Rep 1,264 Posts Drives: 2010 E92 335i MSport 6MT LMB Join Date: Apr 2013 Location: WildWest iTrader: (1)	ITT: people who think a car taking a 1/2 car jump doesn't change the outcome of a race. A car taking an early hit at these power levels makes a huge difference. Honestly I think we are seeing the 40-50rwhp advertised gain. If that M4 would have been stock that C7 would have kept walking away with ease. __________________ 2010\|335i\|LMB\|E92\|6MT\|MSport\|Logic7\|335is Clutch\|AE Performance\|BMS\|Walbro\|VRSF 7"\| 149.7mph NFZ AZ 1/2mi 1992\|Pontiac Firebird\|Mild 355ci\|T56\| -I will look on your treasures, gypsy. Is this understood?-
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08-14-2014, 07:44 PM	#88
ixse Major 238 Rep 1,022 Posts Drives: 2015 boxster s Join Date: Jan 2013 Location: CA iTrader: (0)	lol hilarious how people have hard time understanding how fast c7 vette is.. stock m4 would get eaten alive by c7.
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