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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 Completely Stock With Vishnu Downpipe Dyno



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      04-27-2011, 07:52 PM   #23
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Numbers aside, simply looking at the curve. I though 4th in an auto tops out at like 132 or something like that. So he is holding peak power to almost 7k on a stock tune and downpipe?
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      04-27-2011, 07:55 PM   #24
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I think he may have dynoed in 5th gear and just let off early because theres no real point in trying to make more power past 6000 rpm.
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      04-27-2011, 07:56 PM   #25
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Quote:
Originally Posted by htt760 View Post
I think he may have dynoed in 5th gear and just let off early because theres no real point in trying to make more power past 6000 rpm.
Possible, but I doubt it.
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      04-27-2011, 08:03 PM   #26
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Quote:
Originally Posted by Clap135 View Post
Possible, but I doubt it.
You shouldn't doubt it. It's true. In 5th gear, 6500rpm is approx 130mph. Depending on tiresize and tread depth of course. 6500rpm is also the highest the DME will let you rev on the dyno in 5th gear. It throws a roadspeed code and closes the throttle which you can clearly see in the 1st dyno graph.

So yes, the OP dyno'd in 5th gear, up to 6500rpm. QED. Numbers look normal.

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      04-27-2011, 09:09 PM   #27
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I still call bs. Do a real comparison operating the car properly. There's no way you get 20 whp from a downpipe on stock tune. Higher boost, sure but not at 8-9psi...
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      04-27-2011, 09:37 PM   #28
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n54 guys be hatin
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      04-27-2011, 10:28 PM   #29
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      04-28-2011, 12:59 AM   #30
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Nice numbers! Just out of curiosity what issues did you have with your V-Clamp? I couldn't get mine to close enough to get the bolt in, without quite a bit of pressure, so I thought I was doing it wrong.

Also are you getting codes without a tune? I would love it if I didn't have to take my dp out for services.
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      04-28-2011, 01:13 AM   #31
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Quote:
Originally Posted by shiv@vishnu View Post
n54 guys be hatin
lol
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      04-28-2011, 02:04 AM   #32
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Those are really nice gains from a downpipe only (and I have no reason not to trust the dyno graphs - it would have been nice if the RPM was present though). I felt similar gains when I removed my primary cats and was stock with BMW Power Kit only.

What amazes me is that there are downpipe manufactures who can't make dynos of stock versus stock + the stuff they sell. They don't know what they are doing until someone on the forum tests it for them. It's just lame. You can't say "looks like the design works" after you begin selling your stuff...
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      04-28-2011, 05:54 AM   #33
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Quote:
Originally Posted by shiv@vishnu View Post
n54 guys be hatin
I am so jealous of a powerband that resemebles a f250 diesel truck lol. You got me.
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      04-28-2011, 06:24 AM   #34
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Quote:
Originally Posted by shiv@vishnu View Post
n54 guys be hatin
Just don't like apples and oranges compared displayed as apples and apples. Keep the same gear and put rpm on the x-axis. Dyno 101.
5th is higher load so boost will be higher skewing any gains from the dp.
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      04-28-2011, 07:59 AM   #35
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      04-28-2011, 08:15 AM   #36
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Congrats OP and Vishnu. I don't know why people have sand in their vag over some dyno numbers.
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      04-28-2011, 08:59 AM   #37
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Congrats OP and Vishnu. I don't know why people have sand in their vag over some dyno numbers.
Cuz they're bullshit. 20whp gain on stock tune from dp only is a joke. Then to find out that the stock run was in 4th, while the dp run was 5th (higher load, more boost) us ridiculous. This plus plotting vs. mph makes comparing any power gains impossible and begs the integrity question.
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      04-28-2011, 10:25 AM   #38
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Thanks for your comments everyone i'm very happy with how everything turned out.

As for how it was dynoed and how the numbers were obtain i honestly have no reason to fudge the numbers. I took my car got it dynoed and those are the numbers
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      04-28-2011, 12:15 PM   #39
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I got about the same numbers with just the dp.
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      04-29-2011, 10:37 AM   #40
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Quote:
Originally Posted by adrock View Post
Nice numbers! Just out of curiosity what issues did you have with your V-Clamp? I couldn't get mine to close enough to get the bolt in, without quite a bit of pressure, so I thought I was doing it wrong.

Also are you getting codes without a tune? I would love it if I didn't have to take my dp out for services.
I am getting a code but I might try a CEL fix or a spark plug defouler spacer to see if that fixes it.
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      04-29-2011, 11:44 AM   #41
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Quote:
Originally Posted by Calvin@Vishnu View Post
yeah buddy... 50whp gains at ~6200rpm. Looks like the design works

Could you email shiv (shiv@vishnutuning.com) the .drf files? We'd love to get a bone stock to bone stock+dp result for our website.
Am i blind, i only see 15 whp gains?
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      04-29-2011, 12:06 PM   #42
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Quote:
Originally Posted by jokergerm View Post
Am i blind, i only see 15 whp gains?
You are talking about peak gains, Cal is talking about gains through out the rpms.
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      04-30-2011, 01:02 AM   #43
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Quote:
Originally Posted by shockin330i View Post
I got about the same numbers with just the dp.
Ditto shockin I got about the same with just the dp.
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      04-30-2011, 11:17 AM   #44
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I call bullshit
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