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      09-23-2011, 10:38 AM   #1
sluflyer06
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Dyno's: Stock vs. JB4 vs. Cobb

Its really in the title, JB4 felt about as good as the dyno looks which is all over the place, big timing corrections in 46F ambient or 95F didn't matter, running map 1. Its peak # is even misleading beacuse it was just a momentary peak. Cobb map looks smooth and power is way up.

Next up is a intercooler upgrade and see how much top end we pick up, start of run was 86F IAT end of run 136F (58% rise!!!)


Stock vs Cobb Stage 1 3.01




Stock(red)vs. JB4 (blue) vs. Cobb (green)



3 Cobb runs about 3 minutes between each run.
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      09-23-2011, 11:09 AM   #2
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Wow. This is eye opening. To me at least...
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      09-23-2011, 11:22 AM   #3
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so the stock numbers are 277 whp and 294 wtq ?
No way... am I reading something wrong
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      09-23-2011, 11:24 AM   #4
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Shows how much better a flash tune is than a piggyback. Cobb has spent a log of time refining their maps and it has shown. Have to wait for a Cobb for the N55.
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      09-23-2011, 11:26 AM   #5
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Quote:
Originally Posted by nolim1t View Post
so the stock numbers are 277 whp and 294 wtq ?
No way... am I reading something wrong
You're not reading it wrong. There have been numerous independent dyno tests that have shown the same, which is why I'm really curious to see the actual numbers for the BMW tune.
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      09-23-2011, 11:27 AM   #6
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Quote:
Originally Posted by nolim1t View Post
so the stock numbers are 277 whp and 294 wtq ?
No way... am I reading something wrong
Well close 273/294, but thats with DCI and Full Berk exhaust (catless mids plus axleback) however no tuning. Unfortunately no totally bone stock #s.
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      09-23-2011, 11:31 AM   #7
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Quote:
Originally Posted by sluflyer06 View Post
Well close 273/294, but thats with DCI and Full Berk exhaust (catless mids plus axleback) however no tuning. Unfortunately no totally bone stock #s.
They're in line with stock numbers.

Automobile Mag Numbers



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      09-23-2011, 11:39 AM   #8
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Yea, I don't expect the exhaust or DCi would really affect the no tune #'s much, looks to have picked up some torque which is to be expected losing 2 of the cats.

The Cobb runs were done with stock airbox.
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      09-23-2011, 11:40 AM   #9
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Quote:
Originally Posted by nolim1t View Post
so the stock numbers are 277 whp and 294 wtq ?
No way... am I reading something wrong
They sound about right. Are you thinking they are too high, or too low?
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      09-23-2011, 11:55 AM   #10
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Quote:
Originally Posted by Experimental View Post
They sound about right. Are you thinking they are too high, or too low?
Sounds high lol
But hey I'm not complaining

That's almost like what I am running. but I guess the catless midpipes are most important. Currently I am at DCI and Berk Axleback
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      09-23-2011, 12:11 PM   #11
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What octane?
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      09-23-2011, 12:19 PM   #12
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93oct. and ~540ft. ASL.
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      09-23-2011, 12:24 PM   #13
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Cool...u guys gonna do a run against Procede?

Stock numbers look right; i dyno'd 265 stock.
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      09-23-2011, 12:27 PM   #14
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Thanks for doing the testing but keep in mind the JB4 tuning not running properly (with massive timing pulls) during these runs. The results are not typical of JB4 results. For example here is a recent JB4 dyno chart on map 1 on 93 octane, otherwise stock.

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      09-23-2011, 12:40 PM   #15
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I don't doubt it Mike, and I'm glad that curve looks good, nobodies trying to say the JB4 is a POS it just doesn't work for all cars.

The car is mechanically sound; it runs fine stock, it runs fine with the Cobb tune as well, which means the only variable that's changing is the tune when the car is pulling lots of timing and running poorly. Either way you want to look at it...it is the way the car is running with a JB4 on it. Are you trying to imply something is wrong with my JB4 by saying its not running properly?

If anyone has a Procede for me to use I'd be glad to do logs and dyno's with it, I think I'm done buying 'tunes' for the time being.
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      09-23-2011, 01:00 PM   #16
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Quote:
Originally Posted by sluflyer06 View Post
I don't doubt it Mike, and I'm glad that curve looks good, nobodies trying to say the JB4 is a POS it just doesn't work for all cars.

The car is mechanically sound; it runs fine stock, it runs fine with the Cobb tune as well, which means the only variable that's changing is the tune when the car is pulling lots of timing and running poorly. Either way you want to look at it...it is the way the car is running with a JB4 on it. Are you trying to imply something is wrong with my JB4 by saying its not running properly?

If anyone has a Procede for me to use I'd be glad to do logs and dyno's with it, I think I'm done buying 'tunes' for the time being.
As far the JB4 I don't really have all the information to say what the problem might be. When you made your first post about the low dyno results with it I touched base with BMS who was working with you looking at some logs, etc, and they sent a batch of your logs over for me to look at. There was a drop here and there but didn't look anything as bad as what you saw on the dyno. For example here is one that I had received. I know the last dyno was done in 90 degree weather, was this new one done under the same conditions? They said they had suggested you try a new tank of gas and new plugs. Were either of those changed from the old dyno to the new? Also I noticed the last JB4 dyno you posted looked different than the one this time around?



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      09-23-2011, 02:53 PM   #17
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Quote:
Originally Posted by nolim1t View Post
so the stock numbers are 277 whp and 294 wtq ?
No way... am I reading something wrong
Its a dynojet, it always gives higher numbers,
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      09-23-2011, 03:40 PM   #18
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Quote:
Originally Posted by SpaceG135i View Post
Its a dynojet, it always gives higher numbers,
Well not always, but here it certainly seems pretty average for one. Where I used to get my tuning done in Chicago on my Suby it was abit of a heartbreaker as far as Dynojets go, it read significantly lower than my buddies Dyno Dynamics.

From what I'm told the big advantage of Dynojet's is consistency due to using a weighted roller for resistance which doesn't change.

@Mike, its possible the dyno operator didn't print the exact one that I was able to overlay with the Cobb but it was from the same session and it was was 1st run done at the best IAT and with a week of learning/adaption.

I don't know what to say to you/Terry, the product def. works quite well for alot of people, I'm not trying to flame you guys I'm just showing a comparison of 3 different states of tune on 1 car on the same dyno. The JB4 is/was not wounded thats simply how the car runs with it installed for whatever reason.

I don't have any logs from that first session b/c I didn't have a laptop available, I was regularly seeing 3-5* being pulled out on the street. For anyone reading this this isn't a mission to sell you a flash based tune, this is my experience with a Piggyback vs. flash. You should use whatever product your engine is happy with, for me I just don't think seeing lot of timing correction is OK, I've gotten the impression (which may be wrong) on this forum that these events may or may not be knock or might be "pre-knock" suffice to say that whatever it is, its the DME's way of reacting to something it sees as not good and I'd rather not see that type of behavior in my logs especially if it is really is knock events.
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      09-23-2011, 03:56 PM   #19
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Quote:
Originally Posted by sluflyer06 View Post
Well not always, but here it certainly seems pretty average for one. Where I used to get my tuning done in Chicago on my Suby it was abit of a heartbreaker as far as Dynojets go, it read significantly lower than my buddies Dyno Dynamics.

From what I'm told the big advantage of Dynojet's is consistency due to using a weighted roller for resistance which doesn't change.

@Mike, its possible the dyno operator didn't print the exact one that I was able to overlay with the Cobb but it was from the same session and it was was 1st run done at the best IAT and with a week of learning/adaption.

I don't know what to say to you/Terry, the product def. works quite well for alot of people, I'm not trying to flame you guys I'm just showing a comparison of 3 different states of tune on 1 car on the same dyno. The JB4 is/was not wounded thats simply how the car runs with it installed for whatever reason.

I don't have any logs from that first session b/c I didn't have a laptop available, I was regularly seeing 3-5* being pulled out on the street. For anyone reading this this isn't a mission to sell you a flash based tune, this is my experience with a Piggyback vs. flash. You should use whatever product your engine is happy with, for me I just don't think seeing lot of timing correction is OK, I've gotten the impression (which may be wrong) on this forum that these events may or may not be knock or might be "pre-knock" suffice to say that whatever it is, its the DME's way of reacting to something it sees as not good and I'd rather not see that type of behavior in my logs especially if it is really is knock events.
I think his point was simply that there were other changes from the last dyno to this dyno that might account for some or the majority of the differences observed on the dyno. Like weather, the new plugs, fresh tank of gas, etc. I am not discounting your testing nor do I think anyone is. Just pointing out that the JB4 results should be much better and have been much better on other cars which you already know, but other readers may not.

Mike
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      09-23-2011, 04:30 PM   #20
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LEts see a fbo stage 2 jb4 vs a cobb stage fbo!!!
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      09-23-2011, 04:52 PM   #21
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Quote:
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LEts see a fbo stage 2 jb4 vs a cobb stage fbo!!!
cobb has stage 2 beta maps out... with and without FMIC...
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      09-23-2011, 04:56 PM   #22
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Quote:
Originally Posted by igzekyativ View Post
cobb has stage 2 beta maps out... with and without FMIC...
The maps are actually available to the public, final release not beta.
***

On another note:
These Jb4 dyno graphs seem to be low balled in some aspect.
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