Engine swap 1.8carb - 1.8K-jet

Hello!




Is there any experts out here that could help a car noob out?
I own a 1987 1.8 cab that has a carburator. The engine said goodnight so i recently bought a 1.8 GTI engine with K-jet.(from golf mk1)Ive tried to look for some kind of guides on the internett and asked a couple off ppl, but nobody can help me. Im looking for info what i need to do after i have swapped out the old engine with the new one. Do i need a new fuel pump? Then what kind, ect. I really need all the information.. i usally only mess around with old mopeds/pitbikes so this car stuff is pretty advanced for me, lol.




Thanks in advance and sorry for my bad English

Hi and welcome,
Did you get the k-jet pump, accumulator, fuel tank, metering head and flow plate/arm, injector lines to mention a few things?
You would probably be better off blocking off the injector holes in the head and fitting the carb/manifold to the k-jet engine.

you are about to give yourself a lot of work
and headaches mate

lhasadreams said

Hi and welcome,
Did you get the k-jet pump, accumulator, fuel tank, metering head and flow plate/arm, injector lines to mention a few things?
You would probably be better off blocking off the injector holes in the head and fitting the carb/manifold to the k-jet engine.

Hello and thanks for fast respons,  i did not get the accumulator or fuel tank. im not sure what those others things u mentioned are, so i will try to upload a picture of what i got. This is what i got to work with. thanks again.

lhasadreams said

Hi and welcome,
Did you get the k-jet pump, accumulator, fuel tank, metering head and flow plate/arm, injector lines to mention a few things?
You would probably be better off blocking off the injector holes in the head and fitting the carb/manifold to the k-jet engine.

Probably the best idea. You could sell off the kjet bits as well. Only thing I'm unsure of is if the carb engine has a different compression ratio to the k-jet (which is 10:1). You may well be able to just swap the head off the carb engine onto the k-jet block.
That engine actually looks rather tidy!

price you could sell on the k jet parts would probably cover a pair of weber carburettors

I agree, I wouldn't want to take that on. What's the point? Stick another carb engine in it, if you want a GTi sell it and buy a GTi. It's a lot of work for an extra 15hp.

jazzydog said

I agree, I wouldn't want to take that on. What's the point? Stick another carb engine in it, if you want a GTi sell it and buy a GTi. It's a lot of work for an extra 15hp.

Mega task mate

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nicci21paul said

jazzydog said

I agree, I wouldn't want to take that on. What's the point? Stick another carb engine in it, if you want a GTi sell it and buy a GTi. It's a lot of work for an extra 15hp.

Mega task mate

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Would probably have done it  a few years back would want 1k at this time labour cost

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jazzydog said

I agree, I wouldn't want to take that on. What's the point? Stick another carb engine in it, if you want a GTi sell it and buy a GTi. It's a lot of work for an extra 15hp.

Hey! Here in norway, these things dosent grow on trees, ive spent over 3 years finding a engine, and ive not been lazy looking for one. Its alot of 1.1 and 1,5 engines but i want a 1.8. A GTI in norway cost around 20000€ so thats not gonna happend

paceman said

lhasadreams said

Hi and welcome,
Did you get the k-jet pump, accumulator, fuel tank, metering head and flow plate/arm, injector lines to mention a few things?
You would probably be better off blocking off the injector holes in the head and fitting the carb/manifold to the k-jet engine.

Probably the best idea. You could sell off the kjet bits as well. Only thing I'm unsure of is if the carb engine has a different compression ratio to the k-jet (which is 10:1). You may well be able to just swap the head off the carb engine onto the k-jet block.
That engine actually looks rather tidy!

The engine i got is super good, only got 120k kilometers on it, so thats why i want to use it. Do you know what i need to make it running? Heard some rumors that i only need a electric fuel pump and a surge tank, but im no expert. Thanks!

Its a pretty easy conversion if you have ALL the parts, for instance  theres more wiring needed,  The k-jet system needs 5 bar fuel pressure and a fuel return line. As already suggested finding the parts bit by bit is not easy if you dont know exactly what you need..  Also k-jet parts need to be in good condition to work properly, can be a pain if you dont know what you are doing,  i dont and i wouldnt run k-jet now, great in the 1980,s bit old fashioned now, as are carbs..

Fuel delivery schematic
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/2/201-69000/
Airflow / injection
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/1/133-48000/
Cold start
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/1/133-50000/
From these I think you could try to identify what parts you have missing, it's not going to be too hard to work out what you need to add into your existing looms to control the fuel pump and the other various items, I('m not able to help you there) once you remove yours and look to see what is pinned to the connectors.

So to start a list of what's needed, hopefully the more experienced members will add in more details or correct


Injection fuel tank- probably as well to replace filler pipe at same time
Fuel accumulator
High pressure fuel pump / hoses / pump mounting cradle
Fuel lines, return required so it may be an idea to replace with both new
Gti engine wiring loom, Unless you want to modify your own. Fuel pump is run from the rear body loom
Beer, don't forget the beer, you'll need it!

Hope this helps!

Some links to parts


https://www.ebay.co.uk/itm/Volkswagen-Golf-Mk1-GTI-Caddy-MK1-Scirocco-MK2-Engine-Wiring-Loom-/373442632202?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0 

https://www.ebay.co.uk/itm/VW-Golf-MK1-GTi-Convertible-1-8-DX-wiring-loom-/124906796502?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/Vw-Mk1-Golf-Gti-1-6-1-8-GTI-Metering-Head-Intake-Pipe-Scirocco-Kjet-Complete-mk2-/284440214760?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/Mk1-Golf-Fuel-Pump-Cradle-Stainless-Steel-GTI-/234189120564?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/Mk1-Golf-Cabriolet-GTI-Fuel-Tank-/403097328826?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/Race-Rally-Fuel-Injection-Pump-For-VW-Golf-Scirocco-Mk1-GTI-580254909-/372866133357?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/Vw-Golf-Mk1-mk2-Gti-Genuine-Bosch-Fuel-Pressure-Accumulator-K-Jet-431133441B-/265298773311?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/MK1-GOLF-Fuel-Line-accumulator-to-main-fuel-line-all-Mk1-Golf-GTI-171201218C-/392748680070?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

https://www.ebay.co.uk/itm/VW-MK1-GOLF-GTI-1-6i-1-8i-K-JET-FUEL-LINE-PIPE-ACCUMULATOR-to-FUEL-PUMP-Cabrio-/313657334394?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0

 

jakethepeg007 said

Fuel delivery schematic
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/2/201-69000/
Airflow / injection
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/1/133-48000/
Cold start
https://volkswagen.7zap.com/en/rdw/golf/go/1983-7/1/133-50000/
From these I think you could try to identify what parts you have missing, it's not going to be too hard to work out what you need to add into your existing looms to control the fuel pump and the other various items, I('m not able to help you there) once you remove yours and look to see what is pinned to the connectors.

So to start a list of what's needed, hopefully the more experienced members will add in more details or correct


Injection fuel tank- probably as well to replace filler pipe at same time
Fuel accumulator
High pressure fuel pump / hoses / pump mounting cradle
Fuel lines, return required so it may be an idea to replace with both new
Gti engine wiring loom, Unless you want to modify your own. Fuel pump is run from the rear body loom
Beer, don't forget the beer, you'll need it!

Hope this helps!

Thanks alot for the great feedback. Think im going to listen to the majority and remove the k-jet and go carb insted, sounds like alot less work?  Could u reccomend something about that? Do i need a new intake? What kind of carb do i need ect. Thanks again  

You have a few choices

Bike carbs
Twin Webber's
Independent throttle bodies

I guess each has their own benefits and costs, better to do your own research and decide which challenge suits you best

Good luck

jakethepeg007 said

You have a few choices

Bike carbs
Twin Webber's
Independent throttle bodies

I guess each has their own benefits and costs, better to do your own research and decide which challenge suits you best

Good luck

Good luck carburettor to k jet if that's the route you want to take

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Kimeng keep us updated in your progress and plans

Hello again! 

Because of some healt issues the MK1 prosject hasent gotten any priority, but now im up and running again. 

I got the old engine and gearbox out this weekend, ill drop some pictures. 



Now to the hard part, what is next on then list? I dismantled the K-jet from the new engine, first issue is what am i supposed to do about the jets? Im gonna run a carburator so these needs to be blinded? Is that the right english word?  Ill try so see if the intake from the old engine fits next week😬 every piece of information and help is much appricieted! 

The injector seats will unscrew once you take the injectors out, you'll be able to match a blind plug to them and replace once they are out.
Injectors will pop out with a big screwdriver. Be fairly gentle with the removal of the seat as you don't want to break it and drop parts into the combustion chamber

jakethepeg007 said

The injector seats will unscrew once you take the injectors out, you'll be able to match a blind plug to them and replace once they are out.
Injectors will pop out with a big screwdriver. Be fairly gentle with the removal of the seat as you don't want to break it and drop parts into the combustion chamber

Thanks for the feedback, ill look into that. do you have any links for blind plugs?  i was thinking about buying a new exhaust manifold while im at it, do you have any reccomodations? i want a "performance" type. ive been looking at 2 diffrent  ones.

https://www.ebay.co.uk/itm/233453289253?mkevt=1&mkpid=0&emsid=e11050.m43.l1123&mkcid=26&ch=osgood&euid=9be91d253d4b471baa3d5c89bc284644&bu=45632169401&osub=-1%7E1&crd=20220911085648&segname=11050

and

https://www.werk34.de/en/exhaust-manifold-fit-golf-mk1-convertible-evofag18v.html

which one would u reccomend? thanks again