How good is the 1.8 16v

[fishnchipsx2]

Very interesting...

And how does a 9a head compare to ABF and KR? (Apart from the difference between cams)

[Neo Badness]

Dimensions
Tag Bore Stroke Disp Rod Journal Rod Length Wrist Pin Compression Height Piston Dish Block Height CR
1.7 79.5  86.4  1715  46  136  22  37.5  21  220  8.2:1 
G60 81.0  86.4  1781  48  136  22  39.5  25  220  8:1 
MC  81.0  86.4  2226  46  136  22  41.5  26  220  7.8:1 
1.8 81.0  86.4  1781  48  144  20  32.2  10  220  10:1 
16v 81.0  86.4  1781  48  144  20  33.4  -5  220  10:1 
20v 81.0  86.4  1781  48  144  20  32.8  0.0  220  9.15:1 
 
Tag Bore Stroke Disp Rod Journal Rod Length Wrist Pin Compression Height Piston Dish Block Height CR
3A  82.5  92.8  1984  48  144  20  ?  15.5  220  10.5:1 
9A  82.5  92.8  1984  48  144  20  30.2  -4  220  10.8:1 
ABA 82.5  92.8  1984  48  159  21  30.9  14.61  236  10:1 
 
Tag Bore Stroke Disp Rod Journal Rod Length Wrist Pin Compression Height Piston Dish Block Height CR
1.9 79.5  95.5  1896  48  172  26  45.8  ?  ?  19.5:1 

(Above was taken from US website and they didn't get the ABF), however I beleive the ABF has thicker wrist pins.

Engine Codes

9A - 2.0 16v -137bhp
KR - 1.8 16v. golf GTI - 139bhp
ABF - 2.0 16v. - 150bhp

http://www.gti16v.com/tecspecs.htm

[danny_p]

there are two types of KR head   027  and 051. 

the 027 head is the one with the big inlet ports, most 16v heads are infact a version of the 051.

the 027 has bigger ports  but how much of an advantage this is isn't clear,   the reason some KR's some on very strong at 4000 and feel really peacky and others are a bit tamer is not just down the manifold biut the ports in the head.  from what i can make out they went OTT with the port size and basicly buggerd it up,  henace the later 051 heads all had slightly smaller inlet ports but a better exhaust port.

compareing ABF with KR heads is a bit of a tricky one.

the ABF head is an 051 version,  but with shortend valve guides  so there not sticking down into the port like on the 027 head.   so imo VW did some basic flowing.   Keeep the smaller porst for better sub 4k performance,  but shorten the valve guides so you have head willign fo flow more freely than an 051 from a 9A.  to help give top end.

compression wise,  it seems general opinion that the ABF is 10.5 : 1 CR some rumors of it been 10.8:1  CR at some point i'll measure it  but reagrdless of that ether of those cr's  is quite high.  say the kr head knocks it up 0.5  your to 11.0:1 cr or 11.3:1 cr thats HIGH     

explains why a lot of ABF/KR motors fly aprt when run on kjet.      easyest way to deal with the problem would be to chuck some bumpyer cams in with more exhaust overlap hence dynamic compression will be lowerd but if not doing that it's top end fuel and needs to be very very well setup

[Neo Badness]

Do you mean flay apart as in break when run on Kjet, or Fly as is in rapid? Just to be 100% crystal. Probs being dense as I'm at work ad suffering brain death....

[Diamond Hell]

He means fly apart, as in get blown apart due to detonation and running lean at high revs.

Can we refer to K-Jet as a 'fuel misting system' rather than injection from now? It's a far more accurate description.

[Horney]

Can we refer to K-Jet as a 'fuel misting system' rather than injection from now? It's a far more accurate description.

         

[monzablue16v]

He means fly apart, as in get blown apart due to detonation and running lean at high revs.

Can we refer to K-Jet as a 'fuel misting system' rather than injection from now? It's a far more accurate description.

[Neo Badness]

He means fly apart, as in get blown apart due to detonation and running lean at high revs.

Can we refer to K-Jet as a 'fuel misting system' rather than injection from now? It's a far more accurate description.

I see, thought as much and did think that 11.3.1 was pretty high

So it's ABF everything then. Head, block and loom.

CIS-E Motronic The Abacus of Fuel injection Misting

[Jay77]

thanks for all ur help