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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Vishnu Stg 2: Inital 91 octane dyno testing



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      01-09-2008, 08:09 PM   #67
ArmyBimmerDude
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Quote:
Originally Posted by getInline View Post
Fair enough and pretty much what I expected. I'll probably go for losing a few HP and get the Riss high flow Catted DPs so I can more easily take the piggy out for service visits and ease my environmental conscience oh so slightly.

Thanks for the prompt reply.
Yeah, you lose a few HP, but dont have any of the headaches that come with catless DP's
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      01-09-2008, 08:14 PM   #68
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Quote:
Originally Posted by ArmyBimmerDude View Post
Yeah, you lose a few HP, but dont have any of the headaches that come with catless DP's
Wish he would have tuned for those first......I suspect more people will use the catted versions thant he catless.
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      01-09-2008, 08:15 PM   #69
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Quote:
Originally Posted by ArmyBimmerDude View Post
Yeah, you lose a few HP, but dont have any of the headaches that come with catless DP's
+1. No funky smell either .
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      01-09-2008, 08:22 PM   #70
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Quote:
Originally Posted by rideelement247 View Post
+1. No funky smell either .
Or the noise and other negatives that come with them
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      01-09-2008, 10:06 PM   #71
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Quote:
Originally Posted by ArmyBimmerDude View Post
Or the noise and other negatives that come with them
yeah, i noticed many people like that raspy sound but just not my taste.
I too looking forward to catted DP Map.
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      01-09-2008, 10:13 PM   #72
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I'm thinking the CATTED DP map will only be 5-7 rwhp less than the CATLESS one.

My reasoning:

Shiv actually made 395 rwhp and 390+ rwtq on the catless DP map on 91 Octane.
But to play it a bit safe, he went with the slightly less aggressive tune that resulted in the nice round 390 rwhp / 390 rwtq.

So I'd think the catted DP map would therefore be able to be tuned to get about
383-385 rwhp
380+ rwtq
on 91 Octane.

Not a bad trade off.
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      01-09-2008, 10:13 PM   #73
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Its only raspy if its mated to a non catted exhaust system guys.
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      01-09-2008, 10:18 PM   #74
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Quote:
Originally Posted by M3to335 View Post
Its only raspy if its mated to a non catted exhaust system guys.

which is most of the aftermarket ones
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      01-09-2008, 10:42 PM   #75
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lol seriously lets get the list filled already
Can I borrow $800?
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      01-09-2008, 10:47 PM   #76
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Maybe the catless DP map will work on the catted DPs without any issues.

Shiv's response to this statement:

e90post mods ought to make this a standard emoticon, just like it is on n54tech.com! It comes up over there with :Shiv:
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      01-09-2008, 10:57 PM   #77
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Wow, that's impressive, Shiv! I, too, would appreciate people filling up the Riss GB for sure!

I also want to officially state that I am a supporter of the unlimited torque map.
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      01-09-2008, 11:01 PM   #78
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Great news....

GJ
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      01-09-2008, 11:02 PM   #79
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charlie- when are they coming out with the catted versions?
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      01-09-2008, 11:22 PM   #80
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Quick question, but would going with catless downpipes and keeping the secondary cats accomplish the same thing as catted downpipes in regards to emmisions and power?
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      01-09-2008, 11:24 PM   #81
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Quote:
Originally Posted by kaji335i View Post
Quick question, but would going with catless downpipes and keeping the secondary cats accomplish the same thing as catted downpipes in regards to emmisions and power?
it could be me made to work that way, you would have to relocate several key items.
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      01-09-2008, 11:42 PM   #82
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Quote:
Originally Posted by mkiiieustyle View Post
so i was wondering if there was actually any solution to fueling (or lack there of) on the horizon?

p.s. great numbers man 390hp+390tq =



anything?
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      01-09-2008, 11:44 PM   #83
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The bad thing is that Riss wants first to sell the catless before they start with the R&D for the catted. So please fill up the GB so I can order the catted version asap...
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      01-10-2008, 12:20 AM   #84
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Quote:
Originally Posted by shiv@vishnu View Post
Peak gain is about 25whp. Power gains above 6500rpm is 50-70whp

Update: Dyno graphs now attached to first post

shiv
Nice work Shiv, that is an awesome 91 octane dyno figure, really blows away anything we have seen and that high rpm gain is really exciting to see. Let me know when you want me to butt dyno it lol:

390/390 whp/wtq =

446.7hp/446.7tq at the motor, pretty exciting pump gas #'s on stock intercooler!
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      01-10-2008, 12:25 AM   #85
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Quote:
Originally Posted by Sniz View Post
it could be me made to work that way, you would have to relocate several key items.
What would have to be relocated other than the o2 sensor? If I run a bunge extension (this should eliminate cels) and run the stock secondary cats or high flow cats in the rear, it would be a pretty simple swap in and out.
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      01-10-2008, 12:27 AM   #86
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awesome Shiv...keep up the good work.
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      01-10-2008, 02:42 AM   #87
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Shiv, it looks like during today's tuning session you were able to make some significant gains above 4k rpms (beyond the gains you saw from the downpipes alone). Was that improvement only possibly with the downpipes or do you think that we will be seeing some of these gains in the next map release thanks to what you learned today (for users with just just procede or just procede + intake but no downpipes and exhaust)?

Thanks.
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      01-10-2008, 03:37 AM   #88
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I will be the first to admit, 390hp on 91 octane....amazing!
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