Messages

1

Swaps, Turbos, Buildups / Re: M42/M44 ITB Kit Design

« on: October 10, 2021, 08:51:50 AM »

Just out of curiosity I went to the dyno. The car made 150hp @ 6000 RPM with the OEM ECU. The graph shows a comparison between the OEM's and the variable ITB's setup.

2

Swaps, Turbos, Buildups / Re: M42/M44 ITB Kit Design

« on: July 19, 2021, 06:23:32 AM »

Got more info on the variable length aspect? Did you repurpose the DISA valve in the plenum?

It is working finally, but since I have a 1994 coupe with a DME 1.7 it cannot handle the new intake as well as the DME 5.2 so I have 3 options: 1. remap the factory ECU, 2. install a stand alone ECU, 3. sell my car and buy a newer car with an M44.

https://www.youtube.com/watch?v=nU0JptwB2vw

3

Swaps, Turbos, Buildups / Re: M42/M44 ITB Kit Design

« on: January 25, 2021, 01:48:44 AM »

My questions:
1. I wanted to synchronize the ITB-s with a synchrometer, but without airbox and air flow sensor the car idles rough, so it is not possible. It idles between 1200 and 2000rpm. Did you synchronize the  throttle bodies or just put it together and it runs fine without synchronization?

If those ITB's have air ports on them then you can use a manometer like for a motorcycle. That's what I use on my E30M3 S14 motor.
https://classiccarbs.co.uk/product/keihinmikuni-fzryzfcbrzxrgsxrzzrcbgsktm-4cyl-carb-synchronizer

Cheers,
~Ralph

Okay, thanks, now it idles just fine after running ~60 seconds after a cold start. I had to readjust the throttle bodies.

@PJH318is:
I wouldn't bother the brake booster. I designed a custom made intake piping for the ITB-s. I could keep the longer intake runners (for better low and mid RPM range) and the original brake booster.

You can see it on this video:
https://drive.google.com/file/d/1LHIZCyCGEQiwrYKtbkF__l-QC458P53z/view

If you are interested, I can help you. Just send me a private message!

4

Swaps, Turbos, Buildups / Re: M42/M44 ITB Kit Design

« on: November 03, 2020, 02:25:55 AM »

Got more info on the variable length aspect? Did you repurpose the DISA valve in the plenum?

Yes, I use the DISA valve, but it doesn't create enough power to move the 4 trumpets with the current design, so I redesign the construction right now. If you are interested I could post here when it is working properly.

5

Swaps, Turbos, Buildups / Re: M42/M44 ITB Kit Design

« on: October 29, 2020, 05:22:22 AM »

Hello guys,
I decided to create a variable length ITB on my M42B18 (E36 318IS coupe EU version - I live in Hungary) with a little bit modifications. I ordered the intake manifold from RHD and I designed the rest of the parts. As you wrote I also put non-hardening silicone sealant and applied it around the edge of the butterfly valves. I wanted to keep my ICV so I connected it to the vacuum block. I also kept the PCV valve, that is connected to the vacuum block with an additional vacuum block adapter. DISA and carbon EVAC cansiter valves are not connected into the system right now (electric cables and vacuum lines are also disconnected).
My questions:
1. I wanted to synchronize the ITB-s with a synchrometer, but without airbox and air flow sensor the car idles rough, so it is not possible. It idles between 1200 and 2000rpm. Did you synchronize the  throttle bodies or just put it together and it runs fine without synchronization?
2. The car starts usually only once without airbox and air flow meter. For second try it cranks but I can not start (after waiting a day, then start again for the first time). Injectors and plugs are ok. Did you have similar symptoms?

Thank you for your help!