The Bocsh cis injection thread.

[mazza]

Porsche also used CIS on their late 2.4T's, non RS 2.7's and the Carerra 3 litre cars, so you might find some technical support from unexpected sources if you need further help with that side of things. The CIS on my old 2.4T was adjustable via a pot in the metering head and was a remarkably simple system (but CIS doesn't like cams with much overlap as the intake reversion this causes knackers the metering principle).

Hi Ian

Funny enough, it was the 1976 Porsche 934 group4 that started us with this project.

I was lucky enough to have a few drinks with Ex Porsche engineers that worked on the 934 project and they were nice enough to give us some information regarding the KE Jet set up.

We have and still are gathering data from Volvo/Porsche/Peugeot motorsport divisions regarding the modifications that they did to the Bosch KE jet.

you are spot on regarding the cams, and this is something we are trying to find out how the engineers dealt with this problem. We already have some information regarding this and the shape of the airflow plate/venturi are the components that the motorsport divisions concentrated on.

This is going to be a fun project and we are learning a lot as we go along..so happy days.

cheers
mazza

 

[mazza]

I'm waiting till I get hold of a second set of the triumph throttles, then I can set about joining them together. The tps sensor may prove a challenge as I think it is going to stage a boundery dispute with the water pump.

The bit that hangs down underneath the throttles can be cut off, as that is just an idle stepper motor and bracket. I may try to angle the bodies upwards slightly, just to get that bit more room around the water pump.

I'll keep you posted on how that goes!

Hi mate

I managed to get the ITB's 45mm/force induction plenum/injectors/fuel rail, they should be here with me on tuesday.

chat soon

 

[poormansporsche]

Just being nosey mate and mate all sounds very complicated and interesting but what are you trying to achieve in laymans terms ????

 

[mazza]

Just being nosey mate and mate all sounds very complicated and interesting but what are you trying to achieve in laymans terms ????

Hi Bret

Basically, we are going to play with the KE Jetronic. We have 2 projects, one is a NA project and (mine) is a supercharged set up.
Both engines will be fitted with multi throttle bodies and we will be using beefier fuel distributors etc.

There will be plenty of images that will explain it better mate

all the best
mazza

 

[carat 3.6]

Early Suzuki GSXR throttle bodies are entirely separable from their counterparts if you are going down this route - I sold two pairs of 4 recently that I'd been hoarding for a 911 project and they don't fetch much money now.

Hi Ian,

I did look into using 2 sets of those, as like you say they can be spaced out. The reason I decided to use the triumph throttles is that they are only about 40mm deep, and dont have any injector bosses to get in the way. That means I can get the butterflys as close to the valves as possible.

 

[carat 3.6]

Hi mate

I managed to get the ITB's 45mm/force induction plenum/injectors/fuel rail, they should be here with me on tuesday.

chat soon

Top man!

It will be intresting to see how close the inlet port spacing is on those, compared to the mercedes head. It should be fairly close,I hope!

Now where did I put that jag chargecooler......

Talk soon.

 

[Ian Donkin]

Sounds like you chaps have some interesting ideas... Will be a good one to watch

 

[mazza]

Top man!

It will be intresting to see how close the inlet port spacing is on those, compared to the mercedes head. It should be fairly close,I hope!

Now where did I put that jag chargecooler......

Talk soon.

These little beauties arrived today!

Not bad for £100

Force induction Plenum

4 x 45mm throttle bodies (with one seriously fast action throttle linkage)

ITB'S butterflies

Dump valve housing

Nice lever for Microswitch action

Boost pressure sensor housing

TPS Sensor housing is also there but didnt take pic

more to come

mazza

 

[mazza]

It will be intresting to see how close the inlet port spacing is on those, compared to the mercedes head. It should be fairly close,I hope!
.

Pretty close mate!!

mazza

 

[carat 3.6]

Pretty close mate!!

mazza

Hi Mazza,

Those look made for the job, are you planning to mate them to the merc head by an 20mm thick alloy adaptor plate, or use the mercedes manifold between them?

 

[mazza]

Hey


RPM Signal from ignition module to tachometer is perfect, nice and clean signal

I feel a bit of road dyno coming...lol

mazza

 

[carat 3.6]

RPM Signal from ignition module to tachometer is perfect, nice and clean signal

As if you thought otherwise

 

[mazza]

Hi Mazza,

Those look made for the job, are you planning to mate them to the merc head by an 20mm thick alloy adaptor plate, or use the mercedes manifold between them?

Hi Mate

Initially!! I want to work with force induction KE Jet helped by 4 electronic injectors when under boost, so have to use Mercedes manifold as the base. Runners will be cut approx 6cm from the injector housing.

we will discuss this in more detail..

mazza

 

[mazza]

As if you thought otherwise

LOL!!!

you know how it is..."THINK" is guess work, so performed double testing...my mate with an auto meter with RPM clamp and me with the old laptop...lol

Open a few beers and compare data...Rock and roll!!! lol

mazza

 

[carat 3.6]

I have finaly found a rubber intake boot that fits the m119 afm, came from a 16v kr engined vw corrado. It's actully a few mm too big, but fits good enough for me.

With the imtake boot fitted to the afm, it highlighted just how little room there is left for the air filter. So to free up some space, I have now decided to mount the metering unit at a new angle.

With it mounted this way there is just enough room for a enclosed cone filter, and also a place to mount a small washer bottle behind the headlight.

The chrome air filter in the pics wont be used, it is just there to check how much room is needed.

 

[d w124]

Hey


RPM Signal from ignition module to tachometer is perfect, nice and clean signal

I feel a bit of road dyno coming...lol

mazza

Trip to the petrol garage first

 

[mazza]

Trip to the petrol garage first

Hello matey!

He he! No need, there's at least 70miles in there...lol

All the best mate

mazza

 

[carat 3.6]

Quick update.

I won this set of mk1 golf injector lines on fleabay, should be here in a week or so. Fingers crossed that they are long enough!

 

[mazza]

Quick update.

I won this set of mk1 golf injector lines on fleabay, should be here in a week or so. Fingers crossed that they are long enough!

Hello mate

Nice one! Lets hope they do the job.

If not, there's an amazing motorsport parts supplier about 10 mins away from me. Welcome to the home of Mocal oil coolers and components - Think Auto

I already have some goodies here to test

mazza

 

[carat 3.6]

So I've been doing some thinking about the design of the inlet manifold for the m104. The plan was to build something along the lines of the hagmann 3.4 setup pictured below, long runners into a plenum chamber, then a large pipe up and over the back of the engine.

However, I'm now thinking about the inlet setup used on the vauxhall c30se engines (3.0 24v carlton and senator) pictured below...

The reasons for this are that 1: It is ready made and looks like it could be made to fit fairly easily. 2: It would point in the direction of the afm meter. 3: It has a variable length inlet system known as "daul ram" which I would like to investigate.

The later hfm m104 engines use a variable length inlet system to give better low down tourqe than the 3.0, which does not have such a system. So assuming that the daul ram system could be kept, we might gain some low down power.

It's just an idea for the time being, but I'm open to sugestions about the design.