GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: 6foot6 on 05 June 2009, 14:40
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Hello all, So far I have brought my 8v Digi back from the grave and its now on the road and I have done a few trips to wales and back to London at some very silly cruising speeds and it has held up well no probs Revs and pulls clean. I have over hauled the Gearbox and fully serviced the motor.
I have also tuned the Digi via the Guide on this site (made very little difference) , now as this is the first Gti I have owned and driven Im not sure if it is as quick as one should be. I have a full scorpien exhaust, open filter with custom cold air feed pipe it just feels a little restricted at the topend (6K plus) which is no doubt down to it being a 8v motor ( im used to my twin cam 3sgte in the MR2 that revs to 8K and spins like a motorbike) .
what are my options.
Will a 16v head of a 16v gti fit and work with the digi EFi? (with a few mods no doubt) the AFM should be able to cope with the extra valves and provide the fuel ok, the old K tronic looks like to much of a PITA to swap over. In my mind swapping the head for a 16v seems to be the a easyer option than swaping in a 2.0 engine. Or how about a highlift cam?
My aim is for this to be my main track day car (whilst I over haul the MR2 engine in the autum) i really want more top end.
cheers,
Tom
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you chuck the digi 2 in the bin and fit dig3 if you abf
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Ok what the does that mean?
ABF = Engine code I take it?
Whats involved in swapping and why would I swap in the digi3? If im wanting a 16V head? or wanting the current 8v set-up to perform better?
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Danny's suggestion is to pull out the 8V motor and fit an ABF (2.0 16v from a Golf3).
ABF runs on Digifant3 rather than Digi2 management, which is much smarter - there's no AFM on it and two knock sensors, among other features.
Fannying about taking the 8V head off and replacing it with a 16V head isn't worth it when you can pick up a complete ABF-powered car for less than £500. These also come with a stronger cable-change gearbox, too. This will pretty much bolt right up, although you need a Cordoba 16V o/s driveshaft as Golf3/Toledo 16V are wide track. The cable-change gearbox diff is wider than the rod-change one, thus your current o/s driveshaft won't fit.
Alternatively, pull your current counterflow head off and fit a crossflow head from a later VW. You'll get at least 15% better flow and because the inlet ports are on the front it's much easier to fit throttlebodies, if you really want to play.
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That makes sense. looms the same? or will i be soldering like mad?
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if it's 90 speck golf3 loom is plug and play
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I got a 88 E reg with the hazzard switch on the center console not the steering boss, so I guess it will be a pain.
cheers for the info, so Will the 16v head of a valver fit right up to the 8v block and will the digi 2 work on that?
Cheers again.
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Quit it with the swapping heads already.
What's the point? Buy a complete running motor instead and don't spend loads on head gaskets and head bolts :huh:
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ok ok , but with the EFI in the 8v work with 16v lump (not 2.0 but a 1.8 16v from a mk2), donT want to be faffing about fitting old injection
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the head bolts up to the block thats it. psitons often foul the valves and the CR you get is to low for NA use. but you need to change all the pullys ( cam belt and accsesory ) then fit 16v pistons, also the 8v block dosent have the oil squirtrs that the 16v block has an it also has a smaller oil pump.
a 16v can be made to run on digi 2 but it dosnet work very well, digi 3 is much much much more advanced and fully mapable but will only work on ABF and other 16v's with 60-2 toothed wheel. as for the wireing on a pre 90 you just have to swap the plugs over not that hard
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ok ok , but with the EFI in the 8v work with 16v lump (not 2.0 but a 1.8 16v from a mk2), donT want to be faffing about fitting old injection
Do try and concentrate when you're reading our responses - we're suggesting using Digifant3 from the Golf3 16V - far better and more efficient than either the Digifant2 on the 8V Golf2, or the donkey-style K-Jet injection on the Golf2 16V.
Insert your Golf3 engine, gearbox, loom and ECU into your Golf2 and away you go - no need for a catalytic converter, bang on a tubular manifold and you'll be knocking on the door of 170bhp from the stock motor in next to no time.
And, unlike the second generation MR-2 (featured pirouetting on the cover of CAR Magazine when launched), it'll handle out of the box.
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what do you need to do to the wiring for this conversion on a 1989 GTi 8v ???
i'm also interested in this conversion as it's cheaper than the VR6 conversion i started and the budget was blown within a month !!!
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i would put an abf in they are bullet proof engines and can handdle any abuse you chuck at it i got my engine and entire loom for 200 quid bet 200 i ever spent
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is the ABF 2.0 16v ??
if so what managment do i use ??
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yeah mine a 2.0 16v im using the management from a mk3 16v
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yeah ok but what about wiring for a pre 90 ???
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not to sure i fitted a 90 spec loom just to keep it easy dont take long to do if your going to fit an abf
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but with the 90 spec loom you need the clocks (i now have digifiz) and the fuse box and switches
looks like a chew on , but if i could make my own loom with the GTi loom and the ABF loom i think it is less work and quicker
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i used the 90 spec loom just cause i knew it would run saves trying to bypass the chipped key its all pretty straight forward swapping looms you would need the clocks from a mk3 16v they fit quite nice in the mk2 dash
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loom wise you can put pre 90 plugs on a post 90 loom. once thats done it's also plug and play
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yeah i could do :)
and i can keep the Digifiz dash i just got :)
and no need to rip the dash out :wink: :wink:
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cant see why youd have to loose the digifiz you can get all the same outputs from the abf's managment so it'll work, your fusebox still has fuel pump relay and ecu relay, and the o2 relays are allways cliped ontop anyway even tho you have one anyway
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ok ok , but with the EFI in the 8v work with 16v lump (not 2.0 but a 1.8 16v from a mk2), donT want to be faffing about fitting old injection
And, unlike the second generation MR-2 (featured pirouetting on the cover of CAR Magazine when launched), it'll handle out of the box.
LOL very funny, the MR2 out handles the Golf in every aspect. Far better chassis on the MR2 and loads more feel and tonnes more grip. Like any Mid ship car, when the back end goes and your not quick enough you will loose it. Mine is the early Rev 1 (same as the one on the CAR cover) with the proper suspension setup, not the later "understeer" setup that the Rev2 + cars had - which was changed as 90% of people that bought them had only driven front wheel drive cars and had no idea how to drive them and ended up in a ditch.
The Golf is a great front wheel drive chassis (hence why this is now my track car) but it is leagues behind the MR2, mainly the wrong wheels are driving the car.