GB: Dbilas ITBs / airbox / alpha N

[maxx-automotive]

Hello, in the course of the schrick GB (see thread below), a few people
have become interested in ITBs and possibly airbox and alpha N.

Right now I only have 3 interested people. So, if there are more interested
or if you know of more people that might be interested please pass
the info along. We are glad to help and get a group buy going.

Once ITBs are installed, then you can run Alpha N, which is a
throttle vs. RPM type of piggyback engine management. It
deletes the restrictive AFM (airflow meter) which acts as an
additional throttle loss. We can also make the chips/eproms for the
motronic (we have all the adress table info so that is no problem)

Maxx-automotive has a very good track record in the S14 (E30 M3)
community with both the quality of the product as well as the
level of support and the guarantee. Up until now it was not common
knowledge that we have also M20, M50, M88 and S38 alpha N
applications.

Here is what the Dbilas ITB setups looks like on a 2.7L M20.
Instead of the Dbilas metal air plenum, we are making a
CF airbox (in europe an intake plenum is called an airbox)
for the M20. We already have a setup ITB/airbox for the M50
motor.

http://john.gmstech.de/bilder/M20-327/IM002412.JPG




more pictures can be found in my gallery here:

http://john.gmstech.de/gallery/thumbnails.php?album=5


the alpha N kit looks like this (instead of the airbox shown, you would
use an M20 CF airbox):

http://john.gmstech.de/e30airbox/ankit1.jpg





John

[Jand3rson]

What would the price end up being on the Dbilas set up?

[Low Level E30]

Interested in your setup for the M50 --- can you post some pics and details?

Thanks!

[bimmer2288]

Also interested in prices & specs for the M20 engine setup. PM or e-mail at brandon2288@gmail.com

[DrMcDave]

whats the cost of the CF m20 plenum? what else is used w/ it? alpha N or similar i assume

[BMW2ner]

I'd be interested for the m20 depending on price

[onaquest]

m20 setup

I am interested in your m20 application. Please PM me the pricing.

[DrMcDave]

what are the advantages of the CF airbox over dbilas? Also there aren't part numbers for the CF airbox, atleast not that i have found. also is the price for the CF airbox less than dbilas? Can you add boost w/ the CF airbox?

[Van Westervelt]

John, I am interested in the ITB's for the m20. I'm in for a GB.

[rwh11385]

Not interested, but word of note/suggestion: Under SCCA SoloII rules, as far as I and others read it, intake manifold/throttle bodies are free. Alex was considering ITBs on his beast.

You could find a few more interested people from that, even if they are not on this site. And some Auto-Xers throw down sick $$ for trick setups.

[NC325iC]

price?

[maxx-automotive]

Sorry for the delay in my getting back to you. I forgot to list pricing.
It was listed in our schrick GB thread.

the Dbilas ITBs are 1454 euro.

it is possible to buy the Dbilas airplenum in metal if you so desire.

The M20 CF airbox (intake plenum setup) price is projected
between 950-1100 euro depending upon volume.

to answer some other questions:

there are no part numbers on the airboxes, thats true :)
you just tell me the motor type / chassis type and we know which airbox
is required. Carbon fiber airbox plenums are all hand made! They
are 100% CF and very light and strong as well as very good heat
insulator which is what we want in a cold air intake.

Low level: I will get you the pics of the M50 engine / CF airbox / ITB
setup.


Some people have not quite understood what Alpha N is: basically it
is a type of engine management, it is not a particular product.
"Maxx Alpha N" is a product -- it employs alpha N stlye management
as a piggy back system on the stock Motronic.

The name Alpha N comes from the greek leter alpha representing
throttle angle (measured by a ThrottePositionSensor on the ITB
throttle plates spindle) and the letter N representing engine speed
(rpm). These are the 2 primary inputs for the engine management.
From these inputs, we calculate an "engine load". When we know the
engine load, we can index tables to supply ignition timing and injector
duration. On the piggy back setup, the unit synthesizes and AFM
(air flow meter) signal based on TPS and RPM. This is used by the
motronic as a load signal to index ignition timing, calculate a base
fuel quantity and index a lambda trim table (fuel trimming). Inside
the alpha N is a 16 x 16 table (TPS vs. RPM) which we map for the
particular engine application to program fueling.

To keep it simple:
basically you do all the fuel tuning with the alpha N. The ignition
mapping is on the chip and changed by swapping eprom. Most people
continue to use their chip, some do a chip remap if they have done
significant cam /displacement work. The fuel tuning can be done on the
street if you have a wide band AFR meter. Its not very hard and
is quite successful and proven in the S14 / M3 community. We use
it on normally aspirated engines making 130+ hp per liter efficiency.

John

[DrMcDave]

okay so the CF airplenum uses the TB part of the dbilas if i am understanding this so if that is the case. What are we talking cost wise. Obviously you don't pay the full price for the dbilas then add another 1000 euro for the cf airbox. Total price for a CF airbox and itb setup for an m20 is how much.

[Van Westervelt]

I am still down for this but I havent heard anything. How much for the ITB's and Airboxes? We know the seperate price but what is the total price and hows the ordering taking place?

[maxx-automotive]

This is the price for the Dbilas ITBs. The Dbilas airplenum is NOT
included in that. The airbox pricing is as stated, these are very
high quality CF airboxes. check here
to see how airboxes for other motors are similarly priced in the GB:

http://www.s14.net/forums/showthread.php?s=&threadid=19235&perpage=15&pagenumber=1

e.g. an s14 airbox with all the intallation gear is normally running
1550 euro in Germany. so they save over 300 euro. Thats possible
when there is enough volume.

John