Technical 34mm ITB's in the post :)

[randomizered]

I plan on injecting very close to the valve just like it is on a single throttle body multipoint setup.

As I have fully sequential and a close injector, I can time the injection to occur just as the inlet valve opens or just before (or wherver it responds best. I can ajust the injection timing based on rpm and load as well . The injectors I use have good atomisation.



Above is a Bosch EV12 type off a punto abart turbo (already running these).

I wan't to retain the TPS purely for TPS Accel Enrichment. I will run hybrid, or pure apeed density.

I won't be linking all 4 vaccum lines up together. I will be building a synchro map as per here:

http://www.msefi.com/viewtopic.php?f=38&t=33901

There are some new developments being backported to MS2 from MS3 that will greatly help with MAP signals on ITB's as well


Cheers,

kristian

 

[craigb244]

I plan on injecting very close to the valve just like it is on a single throttle body multipoint setup.

As I have fully sequential and a close injector, I can time the injection to occur just as the inlet valve opens or just before (or wherver it responds best. I can ajust the injection timing based on rpm and load as well . The injectors I use have good atomisation.

View attachment 67746

Above is a Bosch EV12 type off a punto abart turbo (already running these).

I wan't to retain the TPS purely for TPS Accel Enrichment. I will run hybrid, or pure apeed density.

I won't be linking all 4 vaccum lines up together. I will be building a synchro map as per here:

http://www.msefi.com/viewtopic.php?f=38&t=33901

There are some new developments being backported to MS2 from MS3 that will greatly help with MAP signals on ITB's as well


Cheers,

kristian

nice injectors! what CC are they? :chin:

Ive been really tempted to ITB my turbo but it seems for the effort it wont do much to the output. (got a brilliant set of tbs of a brand new bike to!)

trying to shift my arse into getting fully sequential now. Need to get yhe car on a dyno for a full tune but untill I have all that sorted there is no point :bang:

 

[randomizered]

Mine look idential and are made by Bosch.

The EV12, what mine look like, are available in 217 or 269, but i haven't checked my part number. FIAT may have a custom version that they are using. I'd imagine from the additional fuel and retuning, that they are the 269 version. For £30 including the fuel rail, you can't complain at that

With them I run an absolute max of about 55-60 Duty Cycle, but idle is still fine (of course, they are still intended for the 1368cc capacity)

What are you ITB's off and what size? I'm all for palying with different types to find the best.

How are you getting along with runing fully sequential? Still sorting out the cam sensor?

 

[craigb244]

cheers for that... might keep my eye out for some

not sure on the size. think they are around 35-36 they where hard to measure cos the way they are made.
from a (iirc) suzuki 600cc sport bike. it has 2 butterflys in each tb... the first are controlled by what looks like a stepper motor. and the second are cable controlled.
each tb has 2 injectors. one between the 2 butterflys then a second in the port. (not sure on CC but the port injector looks to have a wide spray patten and of a much larger flow)


still researching fully sequential! need the cam cover and cam belt cover from a 8valve mk2 punto it seems.

hey what was that twin VR circuit you have? I recall you sending me the link to it but i cant find it anywhere!

 

[randomizered]

If you mean one of these:

http://jbperf.com/dual_VR/index.html

and are interested in the V1.0 PCB, PM me Populated with some components and 2 x LM1815N chips

 

[randomizered]

Oops, forgot about the ITB's.

Most people remove the sencond butteryfly.

Also 2 x banks of injectors is good for high rpm, but wou can't run staged AND fully sequential together, so it will be one or the other.

I prefere the idea of keeping car injectors near the ports, and a ITB throttle plate.

Whether thats a useable combination, time will tell

 

[randomizered]

I can't find anything as a direct replacement after trawling the web.

Something similar is the BOSCH 0-280-122-001 but it's NOT a direct fit. I think the shaft will fit, but the bolt holes will not line up.

View attachment 67743

I may buy one and just modify it, or keep searching for something else.

Cheers,

Kristian


EDIT - 0-280-122-001 ordered for a few ££, so I will have a play. I have read the shaft will def fit, but the mounting holes are too close together. Should be VERY easy to make up an adapter, or maybe swap the housing over for a neater look.

Been fiddling with this again today. For anyone interested, the shaft is the right shape, but it's too long.

I cut the shaft down, but then discovered that the cut out of the shaft is at the wrong angle, you could use it as is, but the TPS would be sitting at a funky angle and just look rediculous. To solve that, I made the shaft round again by filling it in with chemical metal, and then recut the shaft to a diffrent angle.

Now the TPS fits fine, operates over its range and looks nice and tidy.

IT's are fully rebuilt now (not a fun job), so it's time to get in touch with the engineers on monday as i'm off work, and see what they can make up for me.

Getting there slowly.


Kristian

 

[arc]

Good to see progress! If you see anymore of them injectors let me know!

 

[randomizered]

will do

 

[Whiley]

need a custom inlet made then i take it dude? if so can recommend sandy brown ones hands down!

 

[randomizered]

indeed, cheers mate, i shall give them a google