12-13-2013, 08:42 AM | #45 |
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comon sense tells me
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12-13-2013, 09:50 AM | #46 | |
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12-13-2013, 10:01 AM | #47 |
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As for me I am turbo illiterate. All I know is that all the turbo cars are faster than mine lol. Seriously though I have to educate myself on turbo tuning and the like. I have had "chips" in the past on my E36M but other than that I have always been a tires and suspension (Boring) modder. I will say super cheap power sounds enticing, but I am more concerned with having a reliable car. I might look like Lewis Hamilton but I sure as hell don't drive like him. I THINK I can exploit the my E92 to 85% tops of what it's capable of at my local tracks. Giving me that much more power isn't going to do shit for me until I improve.
So will I tune my M4? Maybe, but after I educate myself on what's good and there is a track record for whatever tuner I choose. |
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12-13-2013, 10:08 AM | #48 | |
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![]() As has been discussed multiple times in various other threads, the S55 at 431hp is most likely underated by 20-30hp, if not more. This has been demonstrated with most other FI BMW engines. I am looking forward to see some real world data (acceleration runs/dynos) that will indicate the actual power that the S55 generates. |
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12-13-2013, 10:16 AM | #49 | |
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12-13-2013, 10:23 AM | #50 | |
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The problem is the area under the curve doesn't change drastically. The tune is only useful from about 5200 RPM to 6800 RPM. Redline is 7000 but in practice it goes to 7200. It makes a big difference pulling down the front straight in 4th gear at 120 MPH. It only feels a little bit looser revving on the street. I would get the Dinan tune but I don't expect it will be life changing. Just an enhancement like the completion package.
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12-13-2013, 10:58 AM | #51 | ||
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12-13-2013, 11:05 AM | #52 |
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12-13-2013, 11:30 AM | #53 |
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12-13-2013, 11:44 AM | #54 | |
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12-13-2013, 12:15 PM | #55 | |
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12-13-2013, 12:18 PM | #56 | |
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Oh yeah, i may not look like Lewis Hamilton but i sure as hell drive like him. With my tune that is ![]() |
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12-13-2013, 12:26 PM | #57 |
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^Lol
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12-13-2013, 12:31 PM | #58 |
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For a 335is owner who is running intake, downpipes, JB4, exhaust, and ethanol making 429RWHP and 505RWHP I can tell you that the f80 is EASILY possible to reach those numbers.
The problem with the 335is is that it cannot hold the power down. Even with the best tires you can fit. The lack of LSD is a big problem and moving into the F80 generation, which is much more of a track car (with LSD), there is a LIMIT to how much power is needed. I believe people will be able to get it to much higher lengths than they are imagining. Once you catless downpipe/tune and you will be surprised how much the car comes alive. It will scream and I think the perfect combo will be just that. Intake, tune, catless downpipe. No need to run ethanol on a car like this unless you are interested in going fast on the straight line. Remember the M3/M4 is a TRACK car. |
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12-13-2013, 04:43 PM | #59 | |
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12-13-2013, 05:28 PM | #60 |
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50% sounds high but if you know the psi at 650 hp and that this is with standard fuel it would be easier to compare. The GT2 RS as mentioned before makes similar power at similar displacement with 23 psi and the same 9:1 compression rate. That should be about 2 psi extra on the S55 at 10.2:1 compression rate. If the GT-R with 650hp runs 23psi as well it's an increase of 10 psi from stock. 2/10 is 20%.
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12-13-2013, 06:08 PM | #61 | |
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http://switzerperformanceinnovation.com/web_en/switzer-cars/switzer-porsche/porsche-997/ The 600hp stage would be 470hp on a 3l and the 700hp stage would equal 550hp on a 3l. The 800hp street fuel stage would equal 630hp on a 3l engine (the last two stages has upgraded turbos, but still 9.8 CR). So, it's definitely doable to get higher performance even with a high CR turbo engine! |
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12-13-2013, 06:13 PM | #62 |
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Boss330 do you know the boost for these tunes?
Remember the N54 has the same CR as the S55 but run very low boost giving it high tuning potential on stock fuel. You have to check the combination of CR and boost. The S55 is high on both making me doubt that there is much more to be have on stock fuel. You can of course get more hp on the same boost but that means higher rpm and that in turn means large blowers that can generate the large air volume needed to support the pressure at high rpms. Last edited by solstice; 12-13-2013 at 07:23 PM.. |
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12-13-2013, 07:11 PM | #63 | |
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12-13-2013, 09:22 PM | #64 | |
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12-13-2013, 11:20 PM | #65 |
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The evo has a compression ratio of 9:1. 23psi should compare to about 20 psi at 10.2:1. The S55 is already running 18psi peak stock.
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12-13-2013, 11:29 PM | #66 |
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You'll be able to output at least an additional 70-80whp with bolt ons and whatever piggy back is available first without much issue.
We just put in our order for the first M4 available at our local dealer and I'm confident it's going to respond very well to mods. |
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