ITB's info/projects

[steve321]

will it work with the trumpets cos there the the as i had to start with,
(on an E30 it may be different) but the trumpets where usless on my with M3 evo ITB's cos they just hit the alternator

its quite close see, cos the angle of the inlet ports on the head is different to the M3 heads,

idealy i would of thort an easy plenum design would be this




steve
________
Kitchen Measures

[steve321]

you can see in the pics that the itbs on the m3 are pointing up in the up (so the curved trumpets fit ok) but on my M42 the itb point (almost perfectly) sideway,

steve
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Lovely Wendie99

[tim_s]

steve, i think the zoom motorsport plenum is rubbish - unequal length runners, and the 'plenum' bit isn't really acting as one. must lose loads of power. yours is much better, as was my old one!
the trumpets don't work on the e30 either. the e30 has less room to play with than yours mate.

[dino245]

As for the plenum, I want to duplicate the the stock e36m3 set. I had wanted to reposition the alternator so that I can install an oil cooler, but that is a project in its self. I will be making the plenum from carbon composite and use the stock trumpets. The length of the runner through the trumpets and through the throttle body is about 12 inches, which is long but this is the correct leght acording to the pipemax software I am using to design the header and the old Hayabusa set up lenght.

By using the stock stuff it will look clean and be more reliable. The added benifit with moving the alternator to the location of the old A/C compressor is a lower CG, HA HA.

[Alpine003]

I applaud your efforts on the ITB's. I hope you can find the proper tune to make these work good.

[dino245]

Haltech standalone.

[AL GReeNeRy]

how about incorporating this with a maf upgrade or possibly reusing the stock afm.

http://store.666fabrication.com/m42-short-runner-intake-manifo.html

[luigginator]

hey boy im new here  and i have a e36 318is stock but i dont know what to do with it  i want to run fastttt!!!! waht i shut do??

[haledj]

hey boy im new here  and i have a e36 318is stock but i dont know what to do with it  i want to run fastttt!!!! waht i shut do??

Start by making your own thread in the member profiles section; tell us about yourself, your car, and what you want from your car.

Also, please use real words.

Welcome!

[Febi Guibo]

actually, can we get an update etc where everybody is at with this?

over at bf.c, gizmo318i has a pic of his euro S5x based itb setup... and there's a rumor of a dbilas kit for sale somewhere near me, I think...

anyway, any ITB updates please post! thx!!

[haledj]

I am trying to get a ITB project started.  I want to run 2 banks of injectors, one right at the ports and one right after the throttle bodies.  I need to figure out what sportbikes use throttle bodies that are not one piece, but come apart like these.

Original equipment EFI systems are configured to meet very stringent emission regulations and to provide "soft" driveability characteristics. Positioning the injector as close to the inlet valve is beneficial in this respect. Maximum power however, is usually obtained by moving the injector away from the inlet valve, some racing engine manufacturers going as far as to mount the injector high in the velocity stack and others installing two injectors, designed to operate at different RPM. When TWM designed the throttle bodies our engineers were not in favor of having high pressure fuel on the atmosphere side of the throttle plate, although this could have resulted in some power increase. We compromised by mounting the injector as far from the cylinder head as possible while still maintaining the safety afforded by keeping the fuel downstream of the butterfly.

[swiss318is]

why you dont use something like that?? direct bolt on for the 318is e30/e36! they also have the enginemanagement and the maps.

[hoevesruperd]

actually, can we get an update etc where everybody is at with this?

i had posted a thread a few weeks ago about a set of M3 itbs i had found. i'm still in the research and development phase. i decided to take my time with this. i'll prep the car this summer (complete new paint, suspension overhaul and other maintenance and mods) then by december 2008 i will be ready to start working on an M42B21 ITB that hopefully will be dropped in by summer 2009.

the goal is to have a reliable 100hp/liter stroker by the time i finish university
this thread will be very helpful. as Febi said, any updates on your projects will be appreciated

[hoevesruperd]

why you dont use something like that?? direct bolt on for the 318is e30/e36! they also have the enginemanagement and the maps.

for those interested
http://www.dbilas.de/dbilas_eng/index.htm
1453 euros seems a bit pricey tho.
throttle bodies from GSXR can be found on ebay under 300$, then the adapter has to be machined. i'm sure someone you know knows someone that works in a machine shop so it should be too pricey, or get it machined at your university's faculty of engineering. then the airbox can be made out of fiberglass insted of carbon fiber i guess by building a mold and laying down the fiber. (which IMO is one of the interesting parts, to make different prototypes and see how to tune the plenum and runners)
then the engine management being megasquirt
the total is probably under 1500
what are you guys thinking?

[swiss318is]

go and have a look!!
http://www.autoscout24.it/Details.aspx?id=135899799
its a m42 engine with ITB from a 320is... how did he do that!!??

btw..! let me know if one needs a complete dbilas set.. perhaps i can do sth with the price!