CADDY 1600 CARB TO 1800 GTI ENGINE SWAP

[VDUBBUGBOY]

I NEED HELP!!!! I'M SWAPPING THE ENGINE IN MY MATES CADDY AND I NEED HELP. THE CADDY ENGINE WAS A 1600cc CARB'd ENGINE AND I'M FITTING AN ENGINE FROM A 89 GOLF GTI 8V. WE'VE DECIDED THAT RATHER THAN TACKLE THE INJECTION WIRING WE'D FIT TWIN WEBERS, 40'S OR 45'S. I HAVE VERY LITTLE KNOWLEDGE OF ENGINES SO I DON'T KNOW WHAT COMBINATION OF THE 2 ENGINES TO USE. 1800 BLOCK, 1600 HEAD? IF I USE THE INJECTION HEAD HOW DO I BLANK THE INJECTOR HOLES? THE MAIN ISSUE IS WHAT PARTS I WILL NEED FOR THIS CONVERSION AND WHERE TO SOURCE THEM, IE FUEL PUMPS, REGULATORS, WHAT JETS TO USE, WHAT CARBS??? IS FITTING THE CARBS A WISE MOVE? ANY HELP WILL BE GREATLY APPRECIATED, CHEERS BOYS.

[richandhazel]

If you use the injection head, I'm sure you can leave the injectors in there to blank the holes. Do you have the 89 Golf GTI vehicle as a donor car? That will make life a lot easier if you have.

[VDUBBUGBOY]

i HAVE STILL GOT THE CAR ON THE DRIVE. THINK THE NEIGHBOURS ARE BEGINNING TO LOVE IT! I THOUGHT ABOUT USING THE INJECTORS BUT THESE HAVE A HOLE RIGHT THE WAY THROUGH SO I'D PROBABLY HAVE TO USE THE WHOLE RACK AND BLANK THAT SOMEWHERE. I WAS WONDERING IF THE PRESSURE WOULD BLOW THEM OUT THOUGH AS THERE DOESN'T SEEM TO BE ANYTHING TO HOLD THEM IN THE HOLE? ALTHOUGH OBVIOUSELY IT DOESN'T DO IT NOW.

[richandhazel]

No it won't blow the injectors out as they are upstream of the valves. If anything, its the opposite and they get sucked in.

[VDUBBUGBOY]

OH RIGHT, NICE ONE. CHEERS MATE, THAT'S A HELP. JUST SHOWS WHAT I DO KNOW ABOUT ENGINES, OR NOT KNOW!

[kniterider]

i thought the injectors went into the inlet manifold.. which when removed (to fit carbs) wont be there anyway???

or am i getting confused with a different 8v??

 

[VDUBBUGBOY]

NO, ON THIS ENGINE THEY GO DIRECTLY INTO THE HEAD. NOT SURE HOW OTHERS WORK BUT THATS DEFINATELY THE CASE WITH THIS ONE.

[kniterider]

must be a k jet then??? (mechanical fuel injection) i think im getting it mixed up with a digifant....

 

to block the holes, id remove the injectors, drill out to the nearest thread size, then tap accordingly and loctite a grub screw or bolt in...

 

[richandhazel]

Hmmmmmm, I'm going to have to have a look now. I'm certain whether it is k-jet or digifant, makes no difference you can leave the injectors/injector rail in, in both cases they go into the head, not the inlet manifold. I'll have to double check that

[VDUBBUGBOY]

OK MATE, SOUNDS LIKE A PLAN. I'LL BLANK EACH INJECTOR INDIVIDUALLY TO KEEP IT MINIMAL IN THE ENGINE BAY. SO I'LL BE USING THE 1800 BLOCK AND HEAD AND THEN SLAP ON A PAIR OF 40'S OR 45'S. I'LL BE PUTTING IN AN ELECTRIC FUEL PUMP TO UP THE PRESSURE. DO THESE RUN CONTINUOUSELY OR WILL I NEED A REGULATOR TO SWITCH IT ON/OFF DEPENDING ON PRESSURE? I'M ALSO WONDERING WHETHER I CAN KEEP THE 1600 COIL AND USE THAT? WILL IT BE UP TO THE JOB? CAN ANYBODY POINT OUT ANYTHING TO ME THATS NOT BLATANTLY OBVIOUS AS I REALLY DON'T KNOW WHAT I'M DOING. CHEERS FOR THE HELP BOYS, HOPEFULLY I'LL BE ABLE TO GIVE IT BACK SOME DAY.