GolfGTIforum.co.uk
General => The garage => Topic started by: VDUBBUGBOY on 28 April 2005, 15:45
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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.
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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.
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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.
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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.
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OH RIGHT, NICE ONE. CHEERS MATE, THAT'S A HELP. JUST SHOWS WHAT I DO KNOW ABOUT ENGINES, OR NOT KNOW!
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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??
:undecided:
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NO, ON THIS ENGINE THEY GO DIRECTLY INTO THE HEAD. NOT SURE HOW OTHERS WORK BUT THATS DEFINATELY THE CASE WITH THIS ONE.
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must be a k jet then??? (mechanical fuel injection) i think im getting it mixed up with a digifant....
:laugh:
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...
:smiley:
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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 :huh:
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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.
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For a quick fix, use the carb head on the injection engine with the gti cam if it is compatible. The carb engine fuel pump should be OK for the 40's, don't connect the vacc to the distributor.
Steve.
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The coil will be fine, I'm sure they are almost all the same, especially between the 1800 & 1600. If you're worried just nick the coil out of the 1800, the connections will be the same.
The wiring for K-Jet wont actually be that difficult as there isn't much in the way of electrical stuff to wire up, as there is no ECU etc. The problem will be the fact that on the MK1 the airbox goes on the other side :)
If you want an electric pump ideally you'll want to fit one using the GTI relay so if the car cuts out say in a crash, the pump will switch off. But I think you might get away with a bigger one designed for a carb engine, it should give you more than enough pressure I would have thought.
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Cheers boys. Bit of an update, my mate has gotten hold of a pair of Dellorto 45's. I'm planning on fitting an electric fuel pump to up the fuel pressure at the carbs, use the 1800 gti head with each injector tapped and blanked off and use the gti coil. I'm planning on using the carbs setup as they are, with whatever jets they have in them, to get the car running then take it directly somewhere to get it tuned up properly. I don't know what jets they have in them but i'm hoping that whatever they are for, they'll at least get the car running. I'm hoping to either modify the gti gearbox bracket to the caddy gearbox mount or i may consider getting a mark 1 gti box and using the caddy mount to that. Please send any advice this way, thanks for all the help already. I'm finally starting to get a bit more confdent about this build.
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The MK1 gearbox mounts will be fine with either the MK1 or MK2 gearbox, you would only have had a problem if the caddy had a 1.1 or 1.3 engine. In that case you would need to cut the gearbox mount off and reweld it in the 1.6/1.8 position.