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05-20-2010, 07:58 PM | #1 |
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M3 Dyno Failed, Ideas?
2008 E90 M3 6spd MT
Mods: AA rear Section RPI Catless straight pipe/xpipe BMC Air filter and air scoops AA pulley tuning from RPI. Max Horsepower made today was at 350. Whats wrong with the car? looks like i only gained 15 horsepower over-stock. Anyone chime in? Very very disappointed in my Dyno run on a DYNOJET 350 whp was made at 100 Degress. at 98 degress it ran at 334. Something about these numbers arent right. Anyone chime in? Last edited by MRE90M3; 05-20-2010 at 09:00 PM.. Reason: posted Dyno Sheet |
05-20-2010, 08:24 PM | #2 |
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Looks like your tune is not working. You should be making more power. Nothing can really go wrong with the bolt ons. The tune is another story.
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05-20-2010, 08:32 PM | #3 | |
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i agree... it must be the tune. bolt on mods are pretty straight forward.
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05-20-2010, 10:05 PM | #5 |
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ive updated it with my list. tuning or operator i have no idea if he was the right man for it. im in el paso tx. im told thatt he altitude, temperature makes a big difference. but im looking at it.. the higher temp makes more power
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05-20-2010, 10:38 PM | #6 |
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2 degrees temperature will not make make much if any of a difference. If the dyno operator is knowledgeable, you can safely assume that your tune is not working.
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05-21-2010, 02:10 AM | #8 |
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Where's the stock dyno? (hopefully on the very same dyno). Nothing much can be reasonably said without that.
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05-21-2010, 02:58 AM | #9 |
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The way you assume you are making 15hp over stock is not accurate. Technical answers should be answered by, well, people with technical knowledge. Assuming that its the tune is not an accurate assumption. I can assure you that it is NOT the tune. Different dynos, different conditions, dyno operator, etc can effect the numbers. Did the dynojet have a load option? Tire pressure? Strap down tension? Fan? How do you know the mods you have all work well together? Was your mufflers designed to go with straight pipe? What type of gas? Did you get a bad tank of gas? These are all things than can effect your run and this is why we do extensive dyno testing to ensure that these errors are limited. We have countless amount of runs from our customers beating on cars that dynoed much higher. Its just a number man. Best way to see what your car is doing is test each mod alone. Not sure if your exhaust set is right? Try dynoing again with stock mufflers? Try with different gas? Try with different dyno operator? Remember, even the SAME model dyno operated by two shops or two dyno operators can give you completely different results.
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05-21-2010, 02:58 AM | #10 |
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05-21-2010, 03:34 AM | #11 |
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i want to start by saying thank you everyone for giving me your two cents.
a couple of things has happened to the car. my traction control is off, dynamic driving control is off, dynamic breaking is off. due to a couple of "Bad speed Sensors" claimed my dealer. i have a feeling maybe the car was flashed back to normal? im not here to blame anyone, but just to grab info and out put from everyone if possible, so please dont feel like im calling anyone out on this. RPI is reputable no doubt, i have no problem with the products. RPIpower has mentioned many great points i would like to look into. i did call RPI at around 5 pacific time but no one answered so couldnt ask anyone so first things first i posted right here on the forums. I have always assumed the E9x m3s to carry about 320+ no lower (havnt seen any factory dyno this low). Maybe there has been dyno's lower than 320 i just missed it on my way =D. i did look through Pencil geeks dyno list, i also tried posting my sheet on there too didnt really work out.. I am going back to the same dynojet with 100/91 octane at 1:3 ratio. should probably be right around 94 or so. But if anyone else think theres pobably nothing wrong and the car is just in a bad place to dyno, or the shop that dynoed the vehicle wasnt fit for the job, i dont doubt that at all. i will keep everyone posted, and i appreciate everyones input!! makes me feel more at ease lol. |
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05-21-2010, 08:58 AM | #12 | |
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Looking at the graphs it looks like the ECU is backing off at high rpm. My initial thoughts would be poor fuel quality or highly inadequate cooling. With those modifications I have no doubt your making around 370RWHP or 450-465 Fly. |
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05-21-2010, 12:07 PM | #13 | |
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05-21-2010, 12:08 PM | #14 |
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i was expecting to be around that as well but just disappointing numbers..
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05-21-2010, 12:15 PM | #15 |
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you can lose power with a bad tune. not pointing any fingers but i've seen it happen with other tuning companies. they may be great but every now and then they make a small mistake that throws everything off.
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05-21-2010, 12:16 PM | #16 | |
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Cheers.
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05-21-2010, 12:46 PM | #17 | |
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At the end of the day, everyone must understand that this car has been exposed to the potential for a lot of human error (error of the tuning company and error of the dyno operator). So lets all not jump to any conclusions until everything is sorted out, which means 1) finding another dyno, with a new operator 2) making sure the stock dyno was operated properly 3) making sure the tune is operating correctly That was just a quick list of things to be done, I'm sure those such as PG can chime in with a lot more thoughts on where there may be more holes to be filled in (as he has already begun to do (see above). Cheers, e46e92
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05-21-2010, 01:06 PM | #18 | |
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Cheers.
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05-21-2010, 01:14 PM | #19 |
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Ideally, you should dyno both stock and after mods on the same machine, with the same operator, with hopefully the same conditions and not too much time between the dyno runs so it's calibration doesn't drift. But the ideal just won't happen. That's why I also don't discount stats like 0 - 60, 1/4 mile runs and such. And even the good ole butt dyno. All are subject to error. And I feel all have worth.
With that said then to the OP: does it feel any different? Cheers.
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05-21-2010, 01:18 PM | #20 | |
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My last sentence was meant to say: where do you get such information. I'm guessing you guys out there on the west coast have access to more knowledgeable people about these things. Thanks.
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05-22-2010, 02:57 PM | #22 |
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what to dooo what to do... the dyno guy here in el paso tx, didn't have time to do my run yesterday and Am busy tuning other cars that are scheduled.. i guess i will take the car back to California to get it checked.. hopefully ill get answers then...
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