GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: DraGonVRS on 16 August 2013, 10:06
-
Currently my golf has a AAA 12v in her my questions are this:
1) whats pros and cons of 12v over 24v?
2) are the blocks the same on 12v and 24v?
3) what year did the 24v appear? I thought all engines with coil packs were 24v is this true?
Thanks in advance.
Chris
-
The AAA engine only came in 12v format. OBD1 cars had a distributor OBD2 vr's had a coil pack. The 24v vr6's are either the AUE or AQP engine, as found in the mk4 4 motion.
The 24v engine has a variable length intake manifold which gives more torque low down, this is a bit of a weakness with the AAA engine, unless you spend £££ on a Schrick intake manifold.
Just to add, the 12v vr isn't a true DOHC engine in my opinion. Yes there are 2 sets of cams, but neither independently control intake or exhaust valves, they just control a bank of 3 cylinders each. I think VW put the 'DOHC' logo on was because so many other cars of the era were doing so.
Take a look on Wikipedia for the vr6 engine, there is some excellent articles on explaining how the engine works and what differences there are in later adaptions.