2L 8V conversion fuelling
Posted
#1647005
(In Topic #232126)
Newbie
The fuel tank swap is to avoid the need for extra fuel pumps or a reservoir if at all possible, trying to keep things simple. The car isn't going on a track so hoping the swirl pump isn't necessary.
It's my first project and am learning on the job, any advice would be greatly appreciated. Also am clueless about wiring atm but have the full loom and ecu for the AGG.
Cheers,
Posted
Local Hero
A 84.5 and newer uses a 13 gallon tank, no swirl pot internally an in-tank as well as an external pump, and depending on the injection the external pump is 75 psi out and 45 psi in, along with a plethora of additional parts for CIS, including a external filter/swirl pot, that the primary fuel system uses to prevent fuel starvation in Turns when running 1/4 of a tank on fuel.
The easiest way to tell tank size for your frame is if you have a Full Sized Spare tire, or a Space Saver (donut) Tire. The Full sized spare requires a 10 gallon tank whereas the Space Saver tire requires a 13 gallon tank.
Digifant 1990 or newer uses Digifant, the external swirl, 2 pumps one in-tank and one External. and a lot less fru-fru to the fuel pressure regulator attached to the fuel rail.
See: https://volkswagen.7zap.com/en/usa/rabbit+conv+golf+cabrio/conv/1990-44/2/
for some of the differences.
Last edit: by Briano1234
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Newbie
The AGG is going to be electric fuel injection. Any recommendations on a simple set up to fuel it?
Posted
Local Hero
If it's a tin top I would guess you have the full size spare wheel and the smaller 40l tank as I believe it's only cabriolets which have the larger fuel tank? I could be wrong….
Maybe best to clarify which car you have and the year. Is your like this?
https://www.carandclassic.co.uk/car/C759798
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Newbie
Planning on keeping the original 4+E gearbox but with a new 210mm clutch, the AGG is in good nick but have new gaskets to put in and some slight cosmetic work to do.
The car is solid and i'm feeling naively optimistic about the swap. I'm just yet to figure out the fuelling and wiring, so any help would be really appreciated!
Posted
Local Hero
CKinally said
The car is solid and i'm feeling naively optimistic about the swap. I'm just yet to figure out the fuelling and wiring, so any help would be really appreciated!
When playing with fuel, open ventilation lots of it, and no open sourced flames battery disconnected. Best advice I can give to ya.
ps. The 10 gallon tanks were bottom feeders.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Local Hero
I don’t know what fuel system was used in a Mk3 golf or how it works so sorry I can't be much help on fueling but I think a few people have done the conversion.
https://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=technical%2Frunning-gear_2%2Fagg-engine-loom
AGG with carbs.
https://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=specialist%2Fmodifications-and_2%2F2-litre-8v-conversion
https://www.clubgti.com/forums/index.php?threads/mk1-2-0l-8v-agg-conversion.272838/
lots of info here..
https://vwgolfmk1.org.uk/forum/index.php?page=topicview&type=misc&id=modifications-and_2%2Ffrom-1-6-to-2-0-8v-what
Loads of threads out there so have a google (other search engines available..)
Last edit: by mark1gls
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Local Hero
Briano1234 said
ps. The 10 gallon tanks were bottom feeders.
Not true, carb cars like the 1.5GX have a level sender/fuel pipes for send and return at the top.
The GTIs had an extra port at the bottom though (but this isn't a GTI).
Posted
Regional Host NE
so is that an extra port on the bottom of the fuel tank on a GTIpaul_c said
Not true, carb cars like the 1.5GX have a level sender/fuel pipes for send and return at the top.Briano1234 said
ps. The 10 gallon tanks were bottom feeders.
The GTIs had an extra port at the bottom though (but this isn't a GTI).
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Regional Host NE
unit wether carb multi or single point injection needs
to be recycled to a another delivery point fuel tank
fuel pump or another storage vessel is that not true
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Newbie
mark1gls said
I guess you will need some sort of swirl pot as the smaller tanks do suffer from fuel starvation unless you have an original GTi fuel tank which are no longer available as the new ones advertised are diesel tanks with a very crude swirl pots fitted in the tank.
Thanks!
So it sounds like to stick with my existing fuel tank I'd need to get a lift pump, which feeds some sort of reservoir under the car (guessing this is the same as a swirl pot), then a main external pump which gives the pressure needed for EFI.
Was trying to avoid having so many moving parts by swapping to GTI tank and having just one pump (vaguely mentioned on another tread), but sounds like that's the tank which isn't available!
Cool, i'll look into the lift pump etc. route, cheers for the info
Posted
Regional Host NE
if the tank which you have just
purchased brand new does not have
any type of swirl pot is that the question
ckinally is asking ? the fuel supply to the
front of the car is not an issue in my view
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Old Timer
nicci21paul said
so in which direction would you go
if the tank which you have just
purchased brand new does not have
any type of swirl pot is that the question
ckinally is asking ? the fuel supply to the
front of the car is not an issue in my view
I have a carb tank without an internal swirl pot.
You need a plastic cabriolet swirl pot.
Get a late cabriolet lift pump where the outlets go forward towards the wiring connector. You can use a polo lift pump but the outlets face away towards the back of the car and make running the fuel lines tricky.
Mount a gti fuel pump or Bosch 044 in the gti cradle. I bought a stainless version from CQ. Mount the swirl pot where the gti accumulator is positioned, again bought a stainless cradle from CQ.
Connect the fuel system like so:
Alternatively source a good gti tank (hard to come by) and gti fuel setup.
Cheers
Rich
Last edit: by Rich.
Posted
Old Timer
Posted
Old Timer
I guess it ultimately comes down to driving style.
Posted
Regional Host NE
Rich. said
nicci21paul said
so in which direction would you go
if the tank which you have just
purchased brand new does not have
any type of swirl pot is that the question
ckinally is asking ? the fuel supply to the
front of the car is not an issue in my view
I have a carb tank without an internal swirl pot.
You need a plastic cabriolet swirl pot.
Get a late cabriolet lift pump where the outlets go forward towards the wiring connector. You can use a polo lift pump but the outlets face away towards the back of the car and make running the fuel lines tricky.
Mount a gti fuel pump or Bosch 044 in the gti cradle. I bought a stainless version from CQ. Mount the swirl pot where the gti accumulator is positioned, again bought a stainless cradle from CQ.
Connect the fuel system like so:
Alternatively source a good gti tank (hard to come by) and gti fuel setup.
Cheers
Rich
i am not asking for help or advice for myself just an easy solution for the member who started the post i am aware of the fuel line setup cheers paul
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Regional Host NE
a few pumps and accumulators i do have two new
fuel tanks in cabriolets with out internal chambers
obviously different members have different views
so maybe better to work things out youself to suit
yourself
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Regional Host NE
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Regional Host NE
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Old Timer
nicci21paul said
i am not asking for help or advice for myself just an easy solution for the member who started the post i am aware of the fuel line setup cheers paul
Sorry about that Paul, I was meant to quote the poster.
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