Quote:
Cable_Tie wrote:
MY take on it. The primary throat is too large, this leads to low air speed witch inturn come with poor throttle response. A 32/36 is a good improvement for the topend but you will lose some bottom end drivability. This is not usually a problem, but could be in a "drive" car. A lot of people use aftermarket exposed aircleaners that make a lot more noise. This coupled with a peakier engine lends people to belive that they are moving a lot quicker then they really are. Don't mistake a loss in bottom end for an increase in topend.
If you could decrease the primary size I think it would be perfect. Other than that it is a good compromise.
You really need to get a carb setup properly for it to work well. Accelerator pump and power valve are often overlooked but can change the "manners" substantially.
true about the air speeds and primaries, but as with any carby change you should modify your driving style to suit.
i mean, obviously you can't drive a cammed and twin weber fed A14 the same as a standard A14 - 'cruising' rpm now has to change from say 2500rpm to more like 3500rpm to stop it spluttering and kicking like a kangaroo.
it should be the same with a 32/36. you've taken a weber for a 2.0L engine and put it on an A12/14/15 it's going to be over-choked and over-fuelled in the lower rpm range.
a funny thing is, is that when your revs increase so does the efficiency of an overcarbed engine and the engine can now consume the fuel. if tuned correctly, the fuel consumption will only be marginally higher - even though the comparative rpm has increased - because the engine is running more efficiently and the rpm is closer to where peak torque occurs (say 4000rpm for example) and from memory i think where torque and power are the same is 5250rpm on any engine...pls correct me if i'm wrong there anyone - that was a misson remembering that!
so you can see. even though the engine TECHNICALLY should use a lot more fuel, it probably wont use a lot more at all because the engine is operating more efficiently.