05-13-2015, 08:04 AM | #89 | |
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05-13-2015, 09:46 AM | #90 | |
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05-13-2015, 10:24 AM | #91 | ||
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I guess what I'm asking is....if I still have my stock airbox (I do), should I put that back on before going with the Dinan intake (and Stage 2)? |
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05-13-2015, 10:47 AM | #92 | |
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Overall, the power difference for those that had these issues was minimal (~5 HP) and actually being able to feel a power difference is unlikely. |
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05-13-2015, 11:55 AM | #93 | ||
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05-13-2015, 12:09 PM | #94 | |
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05-13-2015, 12:23 PM | #95 |
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Are the numbers posted on those graphs WHP?
I assume they are since there is the BMW listed HP (At the crank) and then the measured HP (Assuming WHP). Sorry for asking silly questions, but wanted to do my research before pulling the trigger |
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05-13-2015, 01:17 PM | #96 | ||
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Dinan only reports numbers at the crank. |
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05-13-2015, 01:37 PM | #97 |
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2014 BMW 435i xDrive M-Sport "Elphie" | Mineral Grey Metallic | Coral Red Interior | M Performance Package I | Premium Package | ConnectedDrive | bootmod3 OTS Stage 1 93 Octane Tune | M Performance Exhaust | M Performance Stainless Steel Pedal Covers | Dinan Performance Spring Set | Dinan Supplemental Ride Quality | Precision Raceworks N55 Ignition Kit
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05-13-2015, 01:39 PM | #98 |
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05-13-2015, 03:33 PM | #100 |
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An upgraded intake from stock/mppk is required for stage 2. An upgraded exhaust is recommended but not required.
Could stage 2 be programmed physically on a stock car? Yes. But without the supporting mods the warranty would be in jeopardy. If we were speaking in terms of competitor products it would be in the same vein of running a catless downpipe/high octane map on a vehicle with a stock downpipe and 91 octane fuel. Obviously this is an extreme comparison but you get the point. |
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05-13-2015, 03:41 PM | #101 | |
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Thanks for the response! |
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05-13-2015, 05:17 PM | #102 |
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I can't believe I'm the first one in this thread who has had Stage 2 installed! My opinion of Stage 2 is that it is a noticeable increase in power over stage 1. My car always felt a little sluggish in the low rpm range (which I know is strange for these cars) and stage 2 has made an improvement in that area. Top end feels great too. Only weird thing about my car and it's always been like this even when stock, is that u have to almost catch the boost hitting just right. Otherwise u can mash the throttle and it just won't give you that pushing you back in your seat feeling. I remember someone else posting about this a while back as well so makes me feel better it's not just me! I also think EWG cars feel different than MWG cars. My buddies MWG car pulls at all times and builds boost a little differently. I drove his car the other day and it feels wayyyy different than mine. He has Dinan Stage 1 and Dinan exhaust. Lastly the intake is too quiet. You can barely hear it with the windows down so if you're planning on getting the intake for a cool sound you may be a bit disappointed. I do feel that the exhaust got s bit louder after stage 2 install maybe from the better breathing intake. Overall I'm happy and no issues thus far.
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05-13-2015, 05:43 PM | #103 | |
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05-13-2015, 09:50 PM | #104 |
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Plus tax. I can thank our weak dollar for the price increase.
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05-13-2015, 11:12 PM | #105 |
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So what would it be at the wheels? What loss factor would you use for a 3/435? Be interesting to see what "Unlock 10 HP and 15 lb-ft of torque in under an hour" for $600 actually looks like at the wheels.
Reason I asked is because back in the bad old days when I was running a 335is with only a piggy back & one of the other 335is guys was running a lot of Dinan equipment we looked like this on page 8 of the BMW 335i section of Drag Times in positions 148 & 149. 148) 12.583*^ 114.529mph 8.062 90.430mph 2.070 BMW 335i 335IS 2011 BEAR-AvHistory 149) 12.590*+ 108.740mph 8.130 87.740mph 1.960 BMW 335i S Dinan Stage 3 Tune 2011 BuraQ
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05-13-2015, 11:52 PM | #106 | |
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"We do use a Dynapack chassis dyno and a DTS engine dyno for all of our testing. Like most OE's, we publish our crank numbers, not wheel horsepower numbers, simply to keep things as accurate as possible. Dinan tests multiple cars with multiple runs and averages them so no one chassis dyno test would be representative. When we compare our engine Dyno Data to our chassis dyno data we find that most if not all chassis dynos, including ours, overstates the lower RPM torque values. Our chassis dyno does not do a coast down for inertia and friction corrections. If we are using the chassis dyno once we have performed multiple Chassis dyno runs and averaged them we apply different correction factors to each RPM to correct for these inflated torque numbers. All this is done to ensure the most accurate reporting to our customers. We list both Stock and Dinan numbers using the same corrections to ensure the comparison is fair. If we are using the Engine Dyno the data is just averaged over multiple runs to get a fair average performance. With both the engine dyno and chassis dyno we ensure the room is as close to standard weather conditions as possible and all dyno runs are performed in the same weather window to ensure comparisons are fair. In most cases Dinan Dyno numbers will be lower than those you will get at low RPM because of the inaccuracy at low RPM previously mentioned. Also in most cases Dinan's numbers will be higher at hi RPM because of the work we do to ensure proper heat exchanging that we find almost no one else does. A few years ago, we put together a really in-depth article on our dyno process and how even slight variables can affect the outcome of any test. http://dinancars.com/dinan-university/ - (Dynamometer Testing and The Modern BMW Engine) It's a long article, but it gives you a really detailed looks at the process with a conclusion that has a good breakdown of what we covered. The most accurate thing we can say is that we've observed over 36 years of tuning, with most models we've tested, that the drivetrain loss is between 6.5 and 15 percent. It’s not as simple as a percentage, as it varies on car, transmission, RPM, vehicle speed and a myriad of other variables." |
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05-14-2015, 12:02 AM | #107 |
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Fair enough have seen the number -15% kicked around a lot & thought it to be a bit high.
That will give the guys some ability to factor & compare Dinan's numbers against most of the other vendors that post chassis (WHP) numbers with there products. They will also have to understand that different types of chassis dyno will generate different numbers for the same piece of equipment. The Mustang system seems to be the most conservative while the most commonly used DynoJet is more liberal & will generate higher numbers.
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05-14-2015, 07:50 PM | #109 |
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I'm getting a quote of about $10K plus tax for the signature package and the monoball kit...might start looking at getting it done in the USA - I'm close-ish to Michigan.
Last edited by jtuds; 05-14-2015 at 08:34 PM.. |
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05-15-2015, 12:11 AM | #110 |
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