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09-23-2011, 09:38 AM | #1 |
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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, 10:26 AM | #5 |
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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, 10:27 AM | #6 |
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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, 10:31 AM | #7 | |
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Quote:
Automobile Mag Numbers
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09-23-2011, 10:39 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, 10:40 AM | #9 |
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09-23-2011, 10:55 AM | #10 | |
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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, 11:19 AM | #12 |
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93oct. and ~540ft. ASL.
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09-23-2011, 11:24 AM | #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, 11:27 AM | #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, 11:40 AM | #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, 12:00 PM | #16 | |
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09-23-2011, 01:53 PM | #17 |
WTF was that, Was it your car?
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09-23-2011, 02:40 PM | #18 |
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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, 02:56 PM | #19 | |
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09-23-2011, 03:52 PM | #21 |
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cobb has stage 2 beta maps out... with and without FMIC...
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09-23-2011, 03:56 PM | #22 |
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