GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: javalin on 15 December 2009, 21:13
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All,
So bit bored tonight and was reading the car bits for brake-up, and the 8v to 16v or vr6 sticky and I got to wondering... If i've a AGG 8v GTI (which I have funnily enough), whats the minimum i'd need? Could I just whack a head on it? Surely far too simple.
I expect its too much effort and money to seriously consider - but 115 -> 150 (ish) HP sounds nice.
James
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Loads more differences than just the head.
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Enlighten us the Wayner!
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Enlighten us the Wayner!
Ok everything I believe the block is different as well as 16V's have oil jets under the pistons.
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head,pistons,block,injection and several bits of wiring are different! (16v uses bosch injection) then the gearbox and its hydraulic clutch
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Putting the 16v head onto an 8v block would be a lot of work.
If all the water and oil ways line up (I suppose some variant of the 16v head will line up) you will be lowering the compression ratio because the 16v combustion chamber is larger. You will then probably need to change the pistons or machine the 8v pistons for cutouts for the valves.
You will then need the whole 16v intake system, throttle body, and air box assembly. Crank sprocket and intermediate shaft, oil pump, and crank trigger wheel etc will need to be changed, as well as sensors and probably sensor positions will need to be changed.
ECU and associated wiring will need to be changed.
Then consider changing to the stronger 02A gearbox and either cable clutch conversion or complete hydraulic clutch.
If you wanted to do a turbo conversion it might be a way to go but the loss of compression ratio plus all the work and effort wouldn't really make it worthwhile. It would be loads easier to transplant the complete abf lump into the car.
Probably loads of stuff I've missed in the above as well.
Paul
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Just LOL
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Anyone know if I can fit my AEE head onto an ABF block :laugh:
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well just curious - thanks anyway.
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Bloody hell, I was wondering if this swap / upgrade was worthwhile, but reading this makes me think that just selling my 8v AGG and buying a 16v would be much more cost effective....... And less hasstle.
And I like my 8v again since sorting the cutting out problem lol........ Better the devil you know!
A good bit of insight though.......
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yeah I came to much the same conclusion. The hydroylic clutch sounded nice though, as did the 150bhp. Engine swap would have been do'able, but a LOT of work. Shame is that there are limited numbers of good, lower mileage 16v's arround. Few VR6's though.
>Better the devil you know!
indeed.
James
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Bloody hell, I was wondering if this swap / upgrade was worthwhile, but reading this makes me think that just selling my 8v AGG and buying a 16v would be much more cost effective....... And less hasstle.
And I like my 8v again since sorting the cutting out problem lol........ Better the devil you know!
A good bit of insight though.......
Why sell the 8v and make a backward step. :rolleyes:
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indeed.
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I'm prob wrong but cant you fit a crossflow head from a mk4 8v? I know it isn't a 16v but can it be done?
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I'm prob wrong but cant you fit a crossflow head from a mk4 8v? I know it isn't a 16v but can it be done?
Yes it can be done, have seena few done with carbs.
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you can also fit ABA heads that was the standard 8v in the us+ they were crossflow similar to the mk4 8v
Not really sure there is any point though, reduced heat in intake but there is reduced flow so doesnt seem much point
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you can also fit ABA heads that was the standard 8v in the us+ they were crossflow similar to the mk4 8v
Not really sure there is any point though, reduced heat in intake but there is reduced flow so doesnt seem much point
Makes fitting carbs a hell alot better.
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you can also fit ABA heads that was the standard 8v in the us+ they were crossflow similar to the mk4 8v
Not really sure there is any point though, reduced heat in intake but there is reduced flow so doesnt seem much point
Makes fitting carbs a hell alot better.
Spot on.
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carbs are for neanderthals :tongue:
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ok - so a twist on this, how hard is it to convert from a cable to a hydraulic clutch? I kinda suspect mine hasn't much longer to live - not slipping but its done 88k on a single clutch on a GTI. (GL clutch died at 70k)
Loving the GF's hydraulic clutch on her Ford Fusion.
James
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ok - so a twist on this, how hard is it to convert from a cable to a hydraulic clutch? I kinda suspect mine hasn't much longer to live - not slipping but its done 88k on a single clutch on a GTI. (GL clutch died at 70k)
Loving the GF's hydraulic clutch on her Ford Fusion.
James
A lot of work including pedal box and I believe the gearbox is different.