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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 > Take 5: Vishnu 335i - Finally tested the Vishnu Stg 1 "kit"



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      11-19-2006, 12:15 AM   #1
shiv@vishnu
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Thumbs up Take 5: Vishnu 335i - Finally tested the Vishnu Stg 1 "kit"

Until now, we've done all our tuning work on my personal 335i. It was one of the earliest cars to the dealer. It never had its ECU updated with the programming update. And it saw a lot of the trial and error process during the tuning adventure. Everything from the boost control solenoid we used to how the Xede was installed as all custom one-off.

Today we finally had the opportunity to install the "kit" version of the Xede on a customer's car (imsambeen). This means that the Xede was installed right next to the ECU, under the ECU cover, away from prying eyes. There was absolutely no wire cutting, drilling or anything nonreversible involved. The Xede installation process itself took about 15 minutes.

Yesterday, Sam drove up from LA. The poor guy left LA at 2AM and meet up with me at the dyno shop in the morning. Having recently taken his car to the dealership for the ECU update, we were very curious as to how it would fair, in stock form, to my non-updated 335i (when it was stock, of course). The results varied between 264-270whp and 283-285lbft. This was 7-10whp and 5-6lbft less than my personal car. The differences are reasonably small and could possibly be accounted for by statistical variance. Or the ecu update is just a bit more conservative. Regardless of lower numbers or now, we're here to tune it! Not to pout over low baseline numbers

After the baseline dyno result, the work began. One of our fabricators built a full dual 2.5" exhaust. Just like the one on my car except that it had a X-pipe integrated in it (customer requested it). Sounded and looked nice.

The next morning, the Xede "kit" was installed. Then the tuning began. Running the same very Xede map that I run in my car, Sam's 335i put down 325whp and 350lb-ft of torque. Real close to what my car did. After some custom tuning, we got it to 330whp and 357lb-ft of torque. Just 3-4whp lower than mine. I suspect this is attributal to the X-pipe which does introduce some exhaust backpressure/turbulence compared to a fully divorced exhaust set-up. But for a car that started off making only 265whp and 283lb-ft of torque, I"m really happy with the results. Here the are:

Sam's 335i Stock Vs. Stg 1 (Xede and exhaust) [pls note that hp and torque axis are scaled differently]


One thing we found out during the testing is that non-Sport packaged cars wont rev out all the way to 7000rpm in 4th gear due to the lower max speed limiter. This is why the dyno graph only goes up to 6300rpm. Just gotta take my word for it since the bottom of the page got truncated by the printer

Just in case you want to compare Sam's Stg 1 car to my personal Stg 1 car (with sport package and higher speed limiter), check it out...

Sam's Stg 1 Vs. Shiv's Stg 1


Like mentioned earlier the only hardware difference between the two cars is that Sam's car had an X-pipe joining both exhaust pipes together whereas my exhaust is completely divorced all the way from turbo to tip. I suspect this is why Sam's car makes slightly less top end power. Although it's really hard to notice on the road

We have two more customer cars to tune this upcoming week (Xede only, no exhaust) and will report the results as they come in.

Cheers,
shiv
www.vishnutuning.com

Last edited by shiv@vishnu; 11-19-2006 at 01:48 AM.
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      11-19-2006, 12:21 AM   #2
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Excellent work! What does the new kit look like installed, and will it void the factory warranty? (will the black box know what's going on?).
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      11-19-2006, 12:26 AM   #3
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Where did you mount Sam's switch?
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      11-19-2006, 12:52 AM   #4
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thats amazing..... i really want a 335i now!

how much does it cost for the exhaust and xede?
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      11-19-2006, 01:07 AM   #5
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sweet! 1st page
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      11-19-2006, 01:15 AM   #6
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Quote:
Originally Posted by Backattack
Excellent work! What does the new kit look like installed, and will it void the factory warranty? (will the black box know what's going on?).
I'll post pics tomorrow of the Xede install. Any mods to the powertrain can potentially void the warranty. No such thing as a free lunch, right? Of course, unlike an ECU reflash, the Xede is easily removable and leaves no traces behind.

335e90-- We didn't not install the switch in Sam's car. That'll come sometime in Jan or Feb, along with the ship-able production version of our exhaust. We still have to mold an insert for the ash tray to house the switch and remote LED.

uhaulball-- Until the next of the year, we're offering free installation and tuning. So the full turn-key price for the Stg 1 kit (Xede and Exhaust) is $3000. Likewise, the Stg 0 kit (Xede only) is $1300. Install and tuning will add another $500 starting Jan. 1st.

Cheers
shiv
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      11-19-2006, 01:32 AM   #7
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ok so, if i get the xede only right? and letting u guys tune the car, and there is sth wrong with the car all of the sudden and i am going to send the car back to the dealer, so i need to remove the xede but the problem is here, for the xede after remove do i need to tune it back to normal mode?

and how about this, after the fix from the dealer i wanna install the xede again....do i need to get it tune it again?
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      11-19-2006, 01:48 AM   #8
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hey shiv, i noticed that sam's car's horsepower starts to drop as it approaches redline a little more than yours. is that a result of the lower redline or something else entirely? one of the great things about your intial tune was that it didnt seem to lose horsepower quite as much as stock as it approached redline.
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      11-19-2006, 01:52 AM   #9
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Getting better all the time...

Quote:
Originally Posted by shiv@vishnu
I'll post pics tomorrow of the Xede install. Any mods to the powertrain can potentially void the warranty. No such thing as a free lunch, right? Of course, unlike an ECU reflash, the Xede is easily removable and leaves no traces behind.

335e90-- We didn't not install the switch in Sam's car. That'll come sometime in Jan or Feb, along with the ship-able production version of our exhaust. We still have to mold an insert for the ash tray to house the switch and remote LED.

uhaulball-- Until the next of the year, we're offering free installation and tuning. So the full turn-key price for the Stg 1 kit (Xede and Exhaust) is $3000. Likewise, the Stg 0 kit (Xede only) is $1300. Install and tuning will add another $500 starting Jan. 1st.

Cheers
shiv
Next question(s)... do you have a mechanical LSD in the plans for this car? As for the switch, what does that do? And the exhaust; what is that good for in HP? What is the zero to 60 times and 1/4 mile after the mods?

; )
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      11-19-2006, 02:10 AM   #10
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^^^^^^^
Q#1: Defer to Shiv
Q#2: The switch allows you to change what map you want to use(think e60 M5)
Q#3: The dyno shown above is with exede AND exhaust. I don't think he has had a chance to test the exhaust by itself.
Q#4: He doesn't go to the track, he will have numbers as soon as one of his customers reports back to him.
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      11-19-2006, 02:10 AM   #11
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Quote:
Originally Posted by Backattack
Next question(s)... do you have a mechanical LSD in the plans for this car? As for the switch, what does that do? And the exhaust; what is that good for in HP? What is the zero to 60 times and 1/4 mile after the mods?

; )

I believe the answer for the 0-100km is 4.1-4.3 secs
with Xede and exhaust
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      11-19-2006, 02:17 AM   #12
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Very good looking curve. Lots of useable power. I cannot wait until my 335 gets in. Thanks for all of the hard work from all of you guys!
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      11-19-2006, 02:24 AM   #13
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amazing job
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      11-19-2006, 04:33 AM   #14
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4.1-4.3? God, that's amazing, and a bargain, too. More "torques" than any reasonable person could possibly need.
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      11-19-2006, 06:02 AM   #15
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Was Sam's car a stick or auto?

Also, what are the chance's that you will release an exhaust for the E90 335i?
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      11-19-2006, 06:27 AM   #16
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I also want to whether sam's car was Auto or stick.

As far as upcoming customers go, any of those cars auto?

btw, graph looks great. gains look promising. I really want to see the result without the exhaust(stg 0). If I do get my hands on the 335i, I really don't want exhaust...
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      11-19-2006, 10:54 AM   #17
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Still want to fly up to Toronto in April?
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      11-19-2006, 11:20 AM   #18
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Yeah, he mentioned that an aftermarket exahsut just by itself, is not very productive in term of power gains.
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      11-19-2006, 11:21 AM   #19
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imsambeen, where are you!!!!!
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      11-19-2006, 11:24 AM   #20
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Nice work again Shiv

Concerning this:

One thing we found out during the testing is that non-Sport packaged cars wont rev out all the way to 7000rpm in 4th gear due to the lower max speed limiter. This is why the dyno graph only goes up to 6300rpm.

Is there a reason why you wern't able to correct this and make the non-sport car the same as Sport by allowing it to rev to redline in 4th through 6th and get the speed limiter to 155. I recall you said you wouldn't remove the 155 limit but I can't see why you wouldn't tune the non-sp to match the Sp unless it adds a deal of complexity. Can you comment please.

Thanks, Kevin
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      11-19-2006, 11:36 AM   #21
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Quote:
Originally Posted by roller84
Was Sam's car a stick or auto?

Also, what are the chance's that you will release an exhaust for the E90 335i?
By logical deduction it had to be 6MT, otherwise the small differences in HP and torque in both the pre-toon and post-toon state would have been attributed to the drivetrain loss from the auto rather than to the ECU update and X-Pipe, correct?
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      11-19-2006, 11:56 AM   #22
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fuck! i wanna trade my e90 in now! im sad! should of bought a e46 m3 or waited.... =*( 100hp+ with only a few mods.....
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