9a Vs KR block
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(In Topic #129374)
Old Timer
9a Vs KR block
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Old Timer
If you can find a audi 6a as these tend to be better looked after. Mine had done 130k. Still had honing marks and no wear internally.
Obvioulsy bore size is different so id go for that.
You doind a build thread? Whats the kit like. Do you think its worth he money?
What are you doing to lower comp? Or does the kit cover that
82 Golf Gti. The snail project (abf turbo one day)
Saab 93 diesel daily
Saab 93 diesel daily
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Get an ABF 16v with it's more modern engine management and it's better rod/stroke ratio and larger inlet plenum runner diameters, still cheap enough and you do not need any of BBM's "IM shaft conversion" parts because they are standard on the ABF and the USA never got those engines. Waste of money buying half the conversion parts over here. Get on the bay for one.
ABF has semi-sequential management, far more advanced than old k-jet, so for cost and tunability maybe add Megasquirt?
For the engine you want to use a spacer plate and the ABF layered head gasket, ARP hardware (rod/head/main studs & bolts)
Also, ABF 16v head and block flow more than any of the others (standard) with greater valve lift, no need to chop and change anything really and helps the torquey characteristics of the supercharger conv with rod/stroke.
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82 Golf Gti. The snail project (abf turbo one day)
Saab 93 diesel daily
Saab 93 diesel daily
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Just seems a bit much doing a hybrid when you could buy a more modern one for peanuts, mine only cost £150 all in
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Old Timer
Anyway the charger kit has been built around the g60. so you use the g60 management like the kit says. Its not a aftermarket kit thats needed it uses vw side.
Id look into wether the kit will be anle to work with the extra 200cc. You dont want to build it to find out your not getting enough fuel/air into the cylinders.
I would use the 9a/6a block
were did you find that for 150?? bargain.. I know what your saying. I would probably do the same if i was building it from scratch. But the kit has half the work done
82 Golf Gti. The snail project (abf turbo one day)
Saab 93 diesel daily
Saab 93 diesel daily
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As far as i aware, kr/9a/abf heads all perform the same. Its the cams that make the difference. abf cams are best, then kr.
No need to compare standard management of the abf anf the old k-jet as that'll be binned for the G60 digifant management normally found on an original 8v engine.
Abf has wrong inlet manifold for G60 aswell, you need the rare scirocco 16v inlet so the TB is on the right side of the engine and not the left like the abf and common mk2 golf 16v's
92 caddy, Now stripped for full rebuild
83 golf gti R1 carbed 16v(soon to have 1.8T)
07 Leon FR TDI daily
Cambridgeshire regional host
83 golf gti R1 carbed 16v(soon to have 1.8T)
07 Leon FR TDI daily
Cambridgeshire regional host
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Old Timer
The kit is quite expensive but its high quality. It includes brackets for relocating the alternator, coolant outlet brackets which avoid the charger, throttle body elbow, throttle cable, spark plugs, crank/water pump pullies etc etc which allow the KR block to be G60`d. To reduce the compression in the engine i purchased a spacer gasket from BBM but ive had a rethink on this and think i want to get hold of a good set of pistons designed to lower the compression which is a much better way of doing it.
I havent started a build thread yet and still have bodywork issues that need to be dealt with. I bought a restored mk1 gti but some of the work will need redoing so im looking for a bodyshop to do that in the north-east.
There are so many choices with this engine that i decided to contact a specialist. Im happy to follow his advice but i wanted to retain as much of the stuff i had already bought as possible. As it stands i have a fully rebuilt KR block on my engine stand with new pistons, rings and bearings all fully lightned and balanced. Im at a crossroads now as to which block to use (i got this engine with another mk1 gti i bought years ago) so the KR block might have to go.
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Personally I'd sell the KR block for a good price and pick up an ABF for around £250. Go to town get the head on the flow bench and lighten and balance the whole thing. Better cams and management then you should be good. How deep is your wallet is the question really?
The comparisons between heads was done on clubgti, all about the same really a KR head with ABF cams will perform almost the same to the standard ABF.
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Heard some good recomendations on quaife diffs but sadly not got one myself
82 Golf Gti. The snail project (abf turbo one day)
Saab 93 diesel daily
Saab 93 diesel daily
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Cero said
Surely if your fitting a G60 you want to lower the CR, none of which you can do using these pistons. KR/9A/ABF are all high compression
Yes this is why a stacked or thicker gasket is used to lower the static CR, not everyone can afford a set of forged pistons.
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abfmk1 said
So what advantage does the abf crank have over the 9a?
Longer stroke so effectively more combustion volume, but you will run in to problems with possible valve interference and will prob need a thicker gaskest or low comp pistons with crown recess. This also means you'd need make sure you get your measurements right if you want to use a high lift cam.
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