What you guys are saying is true by the book, But take or find someone that knows how to change them
I did try 45's and they were crap the 40's are better.. A few years ago we changed to unleaded fuel that was total crap. The fuel compines paid to get your carbs fully recond. Well mine started running funny(even though its manly on Avgas) I took the carbs in to Kelford Camtech and they over hauled them,When I went in to pick them up he wanted to buy them,and offered me shit loads,I said Not for sale as they are better than 45's,He said I bet they are the chokes are gone and the insides have been changed,most of the jets have been weled and redrilled,He said these have been set up for pure racing. As I have also allways said I have no idle under 1500Rpm,but its just full on till the rev counter goes hey wire. Malcolm ""P.S, Find a guy thats hands on and not eyes in factory books. Chris Howard wrote: > I have read quite a few books on webers and done a fair bit of weber > tuning. Although the choke sizes are the same a 45DCOE with a 36mm choke > will flow more air than a 40DCOE with a 36mm choke. As for what size > carb to use, you need to determine approx what size choke you will be > needing. I would use 40DCOEs for a 34mm or smaller choke and 45DCOE for > >34mm. Using the bigger 45DCOE means the throat will taper down more > (i.e. from 45->36mm instead of 40->36mm) giving you a stronger vacuum > signal and better fuel atomisation at light loads. > > Cheers, > > Chris Howard > [EMAIL PROTECTED] > http://turbovan.com/ > > P.S. my L16 came with 45DCOEs with 30mm chokes!... Now running 36mm > after trying 34,36,38,40 > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]] On Behalf Of Terry Rudd > > Sent: Monday, 4 February 2002 11:01 PM > > To: [EMAIL PROTECTED] > > Subject: RE: webers > > > > > > I agree with Chris on this one, i.e. that webers without > > chokes they would > > run like sh*t especially in peak hour traffic but they just > > may run well > > when the cam comes on song on a track. It wouldn't be much > > different to > > hilborne injection which basically is a metered spray of fuel > > squirted into > > an air stream, vacuum and pulse theory seems to be ignored by > > that system > > also. > > > > Many years ago we actually fitted a set of twin 40's to my > > L16 engine, same > > everything as my 45's and the power was down by over 10% > > (dyno measured), I > > know one experience is inconclusive but no one seemed > > surprised at the time > > nor could the experts of the day offer any plausible > > explanation of why this > > is so - seems time doesn't offer any better explanation. > > > > regards > > Terry > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Howard > > Sent: Monday, 4 February 2002 8:19 PM > > To: [EMAIL PROTECTED] > > Subject: RE: webers > > > > > > So how does the carb get a vacuum signal if there is no > > choke?? This is > > the principle of a carburettor... The inlet tract narrows which > > increases air velocity, creates a low pressure area which > > sucks the fuel > > in thru the jets. I would be very surprised if a Weber will > > run properly > > with no chokes at all. I would love to see a pic down the > > throat of your > > working carbs with no chokes. > > > > Cheers, > > > > Chris > > > > > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
