S38B38 MAF deleted

[Alpina]

Well, folks..

Mr X, ((((((( RUMA Tuning ))))) was here in Iceland,, last week and worked on several cars ,,

He deleted my AFM and ,, the result are stunning,,

free-reving the engine ,, is like a modern F1 :1: snap snap

there is no hesitating at all ,, through the whole rev range,,

the engine is quicker reving up trough the gears ,,

it is just when the car starts , when cold ,,that the engine is not as smooth,

he also moved the opening time from the flap a little bit longer in the rev range ,, so there is a ,,,,,,,,,, semi turbo feeling when driving in 4. gear and you let the engine pull at low RPM

the torque curve is ,, excellent ((the feeling ))

we had no chance to go to a dyno

the RPM limit is oem ,, and the V-MAX also,,

E30 CABRIO is not a high speed car,, (( when the car was in EU i had a sprint against some 335,, they were not happy that a old E30 CABRIO pulled away :checkeredflag: and in 250 the noise inside the car when the top is up ,, is like getting a scream from T-REX direct in your ear ))

the oem chip had a 1024 kb memory ((unbeliveble space ))

my new one is 32 kb

the best thing is,, if the customer is not satisfied at all he can install the oem chip ,, end connect the plug to the AFM ,, and drive back to normal

In my case i am really glad for this , program,, next thing is to take the AFM away and put som pipe instead,, ,, so there will be no restriction ,, from the airbox to the intake box kinggf,,

ps,, one happy S3B38 owner

[payney8]

picsorban

[Mike]

You should take a look at a W.A.R. chip....

https://www.millerperformancecars.com

I have been using mine for the past month on m20b28, and am getting nice results.

[Alpina]

The engine have an induvidual program ,,

controled by TPS sensor ..also known as ,, ALPHA N ((like E46 M3 CSL etc))

[SamE30e]

You should take a look at a W.A.R. chip....
www.millerperformancecars.com

I have been using mine for the past month on m20b28, and am getting nice results.

How's that working for you, I totally forgot about that coming out.

[Wh33lhop]

...As an entire forum turns green with envy.

[blueapplesoda]

props to op

[nickpdx]

Sounds great...any pics or vids?

[Alpina]

Sounds great...any pics or vids?

I will put a pipe ,,instead , of the MAF, so after that i can post a picture,

[Alpina]

Here is an explaination of what ALPHA-N actually is ,,,,, from Mr.X


I have been working with race cars all my life and in racing we like to keep thinges as simple as possible and let as few sensors as possible be involved in correcting the base map made for the car!
By doing it that way we have less chance of sensor errors taking us out of the race.. this doesnt mean that we dont have a **** load of sensors fitted to the engine!! We have almost everything you can think of but only fitted for monitoring and logging..

Alpha is the term of the first used factor to calculate the engine load.. and that ofcause is the throttle angle! the "N" is the engineering term of revs. so alpha-n is the throttle angle vs. rpm in a 3d load map that will replace the messured values from the missing mass air flow sensor(MAF)..

The Mss52 ECU have like alot of other ECUs a replacement tabel if the MAF goes bad! the problem is just, the acctual diagnostic function for entering that tabel is really bad so the car normaly runs like **** when they dont work... that doesnt mean if you just disconnect them you would have a nice running car.. because the manufactores like BMW sets the replacement tabel for the MAF low or high so the car either runs rich or lean! but it will still allow the customer to get to the workshop!...

The main reason for the MAF is the emission aproval test.. this test is very hard to pass for the manufactors, and with more polution the more tax pr. produced car.. thats why you see some manufactors use the same engine in models with different preformance!! they save money due to the lower emissions...
The MAF function for the emissions is to give the ECU a precise information of how much air thats going thrugh the engine! so it can make sure the emissons values are 100% at all times no mather engine condition!!
THIS doesnt mean that your car will make the birds fall of the trees when you pass in your MAF less M5, because... during the emission test the engineers block 85% of the airfilter and change 50% of the engine oil to some black thick ****, then they drive around to see if everyting is still ok!
The rule is if 2 customers buy a car the same time and A makes all the services the next 60000miles and B only change the oil 2 times in 60000miles... the emission rate from the cars must be the same!! and you cant compensate for that unless you use a airmass meter to help you out!! or a mapsensor like the CSL so the ecu knows the state of the engine... so if you do run MAF less keep your services..

When you fit a SC to a E39 M5 the poor quality of the MAF sensors can do alot of mess of the base mapping of the car.. and then the companys who makes the SC kits will have big problems with their kits because none of the cars run like the car they used for developing the software for the kit.. thats why the easy sollution is the MAF delete!! so whats done is just disconnecting the airmass sensor take care of the error code shown by the ECU for no connection to the MAF and then you start to tune the replacement tabel and the fuel maps...
alot of tuners dont change the replacement map for the MAF and it will work ok too with the from BMW preset values, and the main reason for this is the car isnt fitted with wideband sensors!((thats another story) E39 M5 can acctualy be converted to wideband sensor i have done it on 3 engines fitted in e36 and e46 chassis used for racing! the cars are N/A and MAF less.. i make them run close loop(full lambda control) at all times and it works very nice.. so it can be done

[DaveSmed]

AlphaN must really wake up that engine I'd imagine, did it use the door style air meter?

It's my understanding that the only real drawback is consumption increases, which you noted as already being a trait of the S38. I was surprised at how well my car ran with the (as you worded) "workshop" AlphaN map.

I chuckled about the T-Rex bit too, I must say you are definitely right about that!