Audi ACE engine

I've got the opportunity of an Audi 2.0 16v engine engine code ACE from a coupe.

I'm only after a 2.0 litre bottom end to fit to my 1982 DX GTI. The question is, is this straight forward to bolt onto the 8v head like the other 2.0 litre conversions?  I haven't seen anything around the forum on the ACE block.

I know I should make use of the 16v head to but not too keen on the extra work for the conversion by the sound of it, although I would love the power. I would be getting a garage to do the work in either case.

Just to confirm too. This is the short block, so no problems with downpipes etc?  

Thanks

Yea the ACE is the same as the 6A, I think it ran CIS-E or KE-jet in order to run a cat, horrible bodged setup.
Shouldn't have any bother plonking a 8v on top. Need to change oil pick-up and sump. There must be plenty of 2.0 8v engines out there rather than split the 16v or is it the use of 'standard' block that appeals

92 to 97 audi 140hp,not seen one to be honest  :wink:
Bert

I like the idea of the standard short block, but the more i read about happy people with 2.0 16v conversions, the more i'm tempted to bite the bullet and stick it all in.

Hopefully the list of parts to put this in my GTI won't be too long.  Best bet is to read up on the 6A converstions then i take it and start building the parts list from that?

Any other advice is appreciated.

Cero, what sump and oil pick-up do i need to source for the 8v conversion?

for the sump any 1.5 - 2.0 MK1/2/3 one will do, the oil pump id assume is the same but if not a 2.0 16v Corrado/Passat 9a one is what i would use

I have an ACE engine code and would like to drop my kr head on top for some extra horses, did  you go ahead with the conversion gti 8v ?

you wont gain anything swappign the head unless its flowed, just swap in a pair of kr cams or just an abf inlet cam.

It might increase the compression ratio slightly, but i dont think it would be noticable.

I had an ACE audi engine in my GTI with twin 45 webers on it made 136.6 BHP at the wheels! Dont know if it was modded tho?

I was under the impression that the ACE 2 ltr bottom end is the same as the 9a/6a engine and is good for 150 horses with a KR head plonked on top.

ACE is indeed a 9a/6a block. But you dont have to swap the head to get 150bhp, just the inlet cam.  

9a/6a/ACE blocks all have lame inlet cams, and good exhaust cams. this is due to the Ke-jet management needing the inlet cam to be crippled to prevent cat damage.

There are 2 main head castings for the 16v big block lump, 027 and 051. 027 is a KR head, 051 is an ABF head.  Early 9a/6a got the KR head, later 9a/6a and the ACE got the ABF head. So technically, late 9a and 6a blocks are identical to the ACE block!

Apparently the ABF has the best flow from the factory, but any head once flowed will give the same results. KR head has a smaller combustion chamber, so will give slightly higher compression vs an ABF head. fitting a KR head to an early 9a/6a will make no difference at all, except for the fact it has a better inlet cam. Which you didnt have to swap the whole head to fit

2.0 equipped with the KR head have a KR exhaust cam, those with the ABF head have an ABF exhaust cam. You need to match the inlet cam to the exhaust cam, mix n match doesn't give as good results. So with the ACE, either fit ABF inlet cam on its own, or a pair of KR cams.

Oh and an easy way to tell them apart, KR heads have bolt down rocker covers, ABF heads have nuts & studs.

So…. keep it all and fit my KR Cams.

The throttle body look different from what i've seen, but i need to delve deeper.

Can I keep all my KR Kjet wiring in situ and just replace with the complete engine then ?, after I've replaced the Cams…

sounds a plan, what sort of BHP do you think it would release ?

Your help is much appreciated rubjonny

yep set of kr cams will see you at least 150bhp maybe more, an abf cam on its own would also work, but its a case of finding one! if you have kr cams to hand just  use them

you'll have to swap a few bits over from the kr, throttle body & inlet will rpobably be all in the wrong place, sump wrong shape etc. all the KR stuff will just swap over, with the exception of the oil filter housing, but iirc though its a different shape it should clear everything ok in the MK1. if not, need one off a 2.0 8v MK3 8v or 16v.

can leave all the kr gubbins in place, just swap over everything thats different from old lump and drop it in!

I didn't go for the conversion in the end.  Found a few other options and about to make the investment, even lined up a garage to do the tricky bits, but got engaged instead.  Paused all work on the Golf for a year at least.  I did try to get a respray into the wedding budget so it could look great in the wedding pics, but didn't get away with that!

Still very keen on engine mods and always have an eye out.  Now have an Audi throttle body ready to fit, but going to stay with the original 8v head but flowed and sourced just the 2.0 bottom end.  then move to handling/bodywork.

Thanks for all the info though.