Searched forum but couldn't find too much detail on weber tuning information.Searched google and found some interesting links to tuning and choosing weber dcoe carburettors.
Links:
http://7faq.com/owbase/ow.asp?HowDoI%2FTuneWeberCarburettorshttp://www.pumaracing.co.uk/Chokes.htmhttp://www.gglotus.org/ggtech/carbjetting/carbjet1.htmEven though no two engines will produce the exact hp could some of the forum members that are using twins webers be kind enough to post up their dyno hp and torque figures and list of modifications of their setups etc for their NA motors and especially the A series.This would help some of us who haven't undertaken the process of choosing the right size webers for different applications.
quote from first link,
Quote:
A large venturi may give more power right at the top end of the power band, but will give this at the expense of lower RPM tractability. Only a circuit racer will benefit from this sort of compromise, on a road car, driveability is much more important. 95 percent of the time, a road engine is nowhere near its peak power, but is near its peak torque for 75 percent of the time. It is much more important therefore to select the main venturi for best driveability, once the venturi size has been selected, then the appropriate carburettor size can be arrived at.
From the links, expected bhp figures could help in choosing the right main venturi sizes.And tuning has been "stressed out" to be very important and things like the wrong choke sizes etc can even affect engine life.(running very rich,oil leaks).
so any dyno sheets or links to some would provide valuable data as to how a similarly modified a series
might run.
The last link was also very informative on how to tune.i.e using a portable exhaust gas analyzer like one sold by gunsons and how to try and evaluate the data you get from its mixture map.Going to a dynamometer tuner etc.
Cheers
Transfer
