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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Some 335i engine tidbits from the Vishnu nerds



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      09-13-2006, 01:50 AM   #1
shiv@vishnu
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Some 335i engine tidbits from the Vishnu nerds

Hi guys,
Spent a good portion of the day digging inside the engine bay. A few things of interest.

1) The car doesn't have a MAF sensor. Instead it calculates load from 2 MAP sensors. One a few inches upstream of the throttle body and one in the intake manifold. The former actually being a T-MAP sensor (a MAP sensor which incorporates a temp sensor in one sensor body). Pretty neat stuff. I've read about this but have yet to see it any car first-hand.

2) Fuel rail pressure varies as a function of engine load. It can go as low as a few hundred psi to as high as 3000psi!

3) The crank trigger is still a 60-2 toothed wheel. They did not change over to the asymetric trigger configuration that is becoming popular lately for their multiple reference points (a plus when it comes to misfire diagnostics.)

More to come...

Shiv
Vishnu Performance Systems
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      09-13-2006, 02:42 AM   #2
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shiv, man we need more guys like you here. i can tell your knowledge is going to greatly benefit out forums here. keep up the great work

PS- i have no idea what you just said but it sounds like knowledge
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      09-13-2006, 03:41 AM   #3
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Whoa, great stuff. Not that I understand it, but still . . .
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      09-13-2006, 05:14 AM   #4
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my only experience with MAP sensors was when converting to individual throttle bodies - . Saw them often on corolla's with individuals + MAP sensor.

Very interesting to see them on the 335i. Your input on any matter of the engine bay would be greatly appreciated here - i am sure of it. =)

thanks!
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      09-13-2006, 07:26 AM   #5
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Another fellow desi doing it big. Any plans for a chip?
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      09-13-2006, 10:16 AM   #6
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So how do they modulate the fuel pressure? Using a vacum hose to change the pressure regulator setting?
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      09-13-2006, 11:05 AM   #7
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this might sound like a really dumb question, but does the 335 have an intercooler? cause i remember looking at pics of the engine on the BMW NA website and i did not see one
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      09-13-2006, 11:37 AM   #8
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I heard it alos has a hydraulic flux capacitor. Is this true?
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      09-13-2006, 11:52 AM   #9
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Shiv,

Didn't realize you were also on the E90 forum. I cross-posted some of your findings earlier this week in this thread:

http://www.e90post.com/forums/showthread.php?t=29711


Here is Shiv's whp dyno data from an E92 335:

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      09-13-2006, 12:42 PM   #10
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Quote:
Originally Posted by Hammerfang
this might sound like a really dumb question, but does the 335 have an intercooler? cause i remember looking at pics of the engine on the BMW NA website and i did not see one
Yes it does. There are engine pictures that show it although I don't have a url.
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      09-13-2006, 12:44 PM   #11
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Quote:
Originally Posted by jmonier
Yes it does. There are engine pictures that show it although I don't have a url.
Detailed pics of 335i engine - http://www.e90post.com/forums/showthread.php?t=24495
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      09-14-2006, 03:50 PM   #12
shiv@vishnu
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Quote:
Originally Posted by JackMac
Shiv,

Didn't realize you were also on the E90 forum. I cross-posted some of your findings earlier this week in this thread:

http://www.e90post.com/forums/showthread.php?t=29711


Here is Shiv's whp dyno data from an E92 335:

Those dyno results are a bit outdated as of this morning

-shiv
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      09-14-2006, 04:00 PM   #13
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give us the new ones!!!
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      09-14-2006, 10:19 PM   #14
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hey shiv, where in sf do you guys work on the 335? i got a ED pickup first week of october, and curious to see more of the vehicle before i go
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      09-14-2006, 11:48 PM   #15
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Quote:
Originally Posted by crex
give us the new ones!!!
okay...
http://www.e90post.com/forums/showthread.php?t=30027
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      09-14-2006, 11:50 PM   #16
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Quote:
Originally Posted by dArNeLLi
hey shiv, where in sf do you guys work on the 335? i got a ED pickup first week of october, and curious to see more of the vehicle before i go
The BMW work that we do isn't offical Vishnu business. It's just what i'm doing on the side. As such, I'm doing all the computer work it in my garage in Blackhawk. And all the test driving on 680 and Calaveras Canyon Rd
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      09-18-2006, 03:51 PM   #17
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ooh nice, where is calaveras canyon road, is that near dumbarton? i'm from san francisco and i work right off of 880, i'd like to check out what your doin if you'd let
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      09-18-2006, 04:02 PM   #18
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Darnelli: East of Dumbarton, more like San Ramon/East bay. Lots of nice roads to test on....
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      09-19-2006, 11:14 PM   #19
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Quote:
Originally Posted by shiv@vishnu

1) The car doesn't have a MAF sensor. Instead it calculates load from 2 MAP sensors. One a few inches upstream of the throttle body and one in the intake manifold. The former actually being a T-MAP sensor (a MAP sensor which incorporates a temp sensor in one sensor body). Pretty neat stuff. I've read about this but have yet to see it any car first-hand.

Shiv
Vishnu Performance Systems
Shiv,
I was looking at that myself when I went to test drive the car, but I didn't see the one in the intake manifold, which is what threw me off. Good thing is that its not a MAF, it would give just a bit more headaches. With the two map sensors, can the former be compared to an AIT sensor? Such as the typical AEM setup, 3/5 GM map sensor and GM AIT sensor. Also with the direct injection and the larger scale in fuel pressure, is there any need for fuel upgrades (injectors, fuel pumps, fuel rail, fpr)?
Thanks.
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      09-19-2006, 11:20 PM   #20
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damn..i'm headed out to blackhawk this weekend...love to check out the ride...can i get a peek??

Quote:
Originally Posted by shiv@vishnu
The BMW work that we do isn't offical Vishnu business. It's just what i'm doing on the side. As such, I'm doing all the computer work it in my garage in Blackhawk. And all the test driving on 680 and Calaveras Canyon Rd
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      09-19-2006, 11:22 PM   #21
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glad someone's playing with it, cause I'm ready to mod the shit out of it. it's fun and its fast.
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      09-20-2006, 08:50 AM   #22
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Quote:
Originally Posted by shiv@vishnu
Hi guys,
Spent a good portion of the day digging inside the engine bay. A few things of interest.

1) The car doesn't have a MAF sensor. Instead it calculates load from 2 MAP sensors. One a few inches upstream of the throttle body and one in the intake manifold. The former actually being a T-MAP sensor (a MAP sensor which incorporates a temp sensor in one sensor body). Pretty neat stuff. I've read about this but have yet to see it any car first-hand.

2) Fuel rail pressure varies as a function of engine load. It can go as low as a few hundred psi to as high as 3000psi!

3) The crank trigger is still a 60-2 toothed wheel. They did not change over to the asymetric trigger configuration that is becoming popular lately for their multiple reference points (a plus when it comes to misfire diagnostics.)

More to come...

Shiv
Vishnu Performance Systems
Even tho I don't understand what you wrote but can you show me how I can do this type of dignosis to my e90330?
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