fitting a 16v to an 8v car

[laurielaeks]

hey, i was just wondering what i could all need to complete the conversion on my mk3 8v, to the 16v,

already have the engine and head and gearbox,

think i might only need the ecu and wiring, just wanting to make sure this is right?
i was going to just buy a 16v but i fell in love with my car lol,

[Wayne]

Your also going to need to convert the clutch, I believe the 16v is hydraulic and yours is cable, worth thinking about your insurance as it will or may be more than a factory car.

[ajgti 16v]

this may help I did the same swap in my mk2 and had awfull problems with trying to get the car to run, it appeared to be fuel pump in the 8v not having enough pressure to get the car 2 run .I dont know if mk2 and mk3 are same set up

[rubjonny]

mk3 gti 8v/16v pumps are the same so thats 1 less issue, could get away with old box but its a lottery. if you plan for big power in the future dont bother, go to hydro.

[laurielaeks]

yeah im just wantin to use as much of my original parts as possible to keep it as cost effective as i can fot the time being, what about engine mounts? front and back, would they still be the same? also can i use my old downpipe of the 8v?

[Wayne]

yeah im just wantin to use as much of my original parts as possible to keep it as cost effective as i can fot the time being, what about engine mounts? front and back, would they still be the same? also can i use my old downpipe of the 8v?

No your going to need to fit the 16v system really as it is a larger bore.

[Ben Lessani]

1. Sell the block and box to a MK2 over and let them whack they're K-Jet bits onto it for an easy conversion.
2. Go and buy 16v and don't build a car that already exists.

[Diamond Hell]

1. Sell the block and box to a MK2 over and let them whack they're K-Jet bits onto it for an easy conversion.
2. Go and buy 16v and don't build a car that already exists.

1. No.  K-jet is for people who like killing engines.
2. Agreed
3. It's their, not they're, please.

The detail differences are myriad, you would be wasting your time.

[Ben Lessani]

1. No.  K-jet is for people who like killing engines.

However the OP doesn't have an ECU or loom - so it would be much easier to punt to a K-Jet customer (whether you like K-Jet or not).

[VeeDubGTI16v]

1. No.  K-jet is for people who like killing engines.
2. Agreed
3. It's their, not they're, please.

The detail differences are myriad, you would be wasting your time.

not all of us are blessed with basic mechanical knowledge eh dh

now change the record, yours is definately broken