1.8 16v turbo (+ injector questions)

so heres another question. How hard would it be to stick with my kjet
system and turbo it? What would i need to do? Is this advisable and
what kind of whp/bhp would i achieve? or am i better just going to efi?



cheers ryan

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K-Jet is no-where near suited for aftermarket turbo conversions IMO. People are likely to tell you that Ford ran it quite happily (ish) on the RS Turbo, and Porsche also used it, as did a couple of 70's/80's Indy cars I believe. But all of the above had far more time, money and experience in R&D to get the fuelling profile correct than you or I. By far the easiest way to get a decent safe tune is with some form of mappable EFI.

 

Yep, best place for k-jet on a turbo`d motor is in the bin , aside from the nightmare you`ll have trying to get it to fuel correctly on boost the air flap has got to be a restiction..

After saying all that Stealthwagon on here runs k-jet with 4 efi injectors/controller for boost and he`s over 250bhp I believe?

 

So the K-jet isn't actually doing much in the way of controlling fuelling then, it's just stuffing a load in and the extra injectors are doing the fine tuning?

 

So how does that work then? i would like to know as well. Is the kjet
just measuring the airflow or something? and whats the point of the efi
injectors?surely it is not doing as good as it could because if he
scrapped the k jet he could have full control other than the both of
them trying to work it out between them.



so i take it that is a big no to kjet and microfueller then?



cheers ryan

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K-jet is jacked wide open fuelling it`s maximum which is short, so the efi controller kick in and supplies the remainder of the fuel required..

I`ve got 510cc`ers now (42lb @ 4bar), and they`re at 80% duty cycle at 6500 rpm (1.6l/min ) at 1 bar.. (giving 11.5 afr, nice and safe..)

 

So i have bought myself some nissan skyline injectors now which i hope will be able to run the car now.



Now the question is just to confirm will i be able to run 1/1.5 bar
boost with either 2 stacked 1.8t headgaskets or a spacer gasket from
street race tuning and a 1.8t headgasket or a headgasket from eip
tuning and keep my 16v pistons and have no problems?



cheers ryan

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im interested in using a spacer plate on a 1.8kr engine. where can i get them from?

 

I`ve gone for 2 stacked G60 gaskets and ARP head stud kit, handles 1 bar fine. Drops the compression ratio by 1 point (approx 180 psi).

 

I have found one place that sells spacer gaskets and that is
streetracetuning.co.uk and also eip tuning sell copper or metal
headgaskets.



Does anyone know who i can contact for the manifolds. I need the
exhaust manifold and also the downpipe. I have everything else now just
the manifolds, some gaskets and belts and to order the megasquirt ecu.
That is another thing actually what megasquirt system do people use? Is
it the v2.2 or the v3?



cheers ryan

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I use a v2.2 on MSnSe, V3 will be a better bet if you want to run MSnSe (has better flyback circuit etc), think MS2 uses the v3 board with a different processor and adaptor but the code isn`t as extensive as MSnSe.

 

Ryan and Lloyd you have pm!!!

i'm starting on my own 16v Turbo this weekend. I still need to find an appropriate turbo for no to much .
i have a T3/T4 turbo off a mini that was hybrided but I think it will be too small for a 2.0 16V I have been gathering info on what cars had T3s as this is the fitment for all the manifolds i do.

Just to be different i'm gonna get it going on k-jet as I dont see why people should keep saying to avoid it!!
it WILL work but not as well as EFI!! I aim to get the spacer gasket and turbo/manifold on and get her going on K-Jet, then build up a megasquirt or the new ECU from USRT (who I am an agent for!! )

this way people will be able to see the options available to them and if like many you are of limited funds/knowledge/tools, you can do the conversion in stages!!!!

 

I've also got a v2.2 board, but that's all that was around when I bought it. As for what to buy now, i'm not entirely sure. Personally i'd probably go for the v3 board as it has capacity to add some interesting features on-board instead of having to patch them on separately as with the v2.2 board, but if you're not the 'experimenting with electronics' type the v2.2 does everything you need for a VW 16v(t) pretty much as is. If you have an odd problem that needs support from the community the v2.2 has an advantage in that it's been around for longer so more people know their way around it.

That wasn't much help, was it?

 

You`ll still have to control the ignition somehow to rtard timing under boost (fit a mappable spark ecu?) which is only a few steps away from EFI.

One chap on votex just missed 200bhp on k-jet (but with a spark controller so that`s cheating..), but if you`re going to use a lot of boost make sure you keep an eye on the AFR`s..

 

Hey raj i would be well interested in seeing your 16v running on kjet
as that is what i really wanted to do and i have been looking on your
website at the spacer gaskets and 16v manifolds. When i wanted to build
the car i wanted it to look as standard as possible.



If i can find one im going to use a t28 turbo off a nissan 200sx s14a
as i have heard some good things about them being fitted onto golf
engines.



Can i also ask who URST are?



I have a friend that has built a mk1 golf 1.8 8v turbo and he is using
a microfuller and the way he has got round advance and retard is by
using a 1.6 gti dizzy as it has the two output for advancing and
retarding the timing and his works really well!!



cheers everyone Ryan

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hey Ryan, yes i spent AGES trying to find one of those things, it's actually just attaches to the dizzy so you just add it rather tahn using the whole dizzy. I'm not too sure if it will work on the 16, for some reason it i think it doesnt but i cant remember why!!! i'll have a look some time today and let you know!! (btw I managed to get 2 of them!!!!)

USRT = usually sideways rally team, they're a group from the states, I'll be putting all their stuff on my site soon so keep watching it!!!

The GT28 is a good turbo, we fitted one to a standard mk4 1.8t (150bhp) and it's making 180 at 4psi!!! need to get it mapped soon so hey can start playing propperly!!!


Edited by: rajmirch

 

Where did you manage to find two microfuellers raj? i have been searching for ages and cant find it or a 1600 gti dizzy!!



Its come to the point if i dont find it i will carry on with the efi
tuning as i have managed to get 6 nissan skyline injectors and plan to
use them all.



Its ok i have the your website bookmarked and plan to buy the spacer gasket off you soon(if the wife allows me!!)



please keep me informed of the k jet tuning as i am really interested in doing it that way



cheers ryan

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BTW i was after those injectors too!!! I had already bought that skyline Turbo and though if going up there i might as well get them too!!!!I got up there a lttle while after you did, we came that close to meeting!!!!

 

I was going to bid on the turbo but was unsure if it was the twin turbo
setup because then i didnt know what side turbo it would be(high boost
low boost).



I stripped down the skyline inlet manifold and cleaned the injectors
and was just sitting in my shed when i looked at the remaining parts
and all off a sudden thought throttle bodies!! So i think i will be
taking a look at that idea tomorrow.



what was the turbo like when you picked it up? What time where you
there at then? I take it you saw that guys mad ass escort, defo no
match for a veedub lol



ryan

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im doing this , but keeping my kjet,got a ttechnics, topend inlet, with 5th injector, a bit crude i no. but wanna see what can be done with the orig injection system, currently looking at rs turbo and sab stufff, for the fueling.


jim