The carbs are/where on a L20B block A87 SSS head,Block has now been rebored to 89mm so I havn't run it since but I sure plan too. Its in the 510SSS I'm rebuilding. Malcolm
Cleary Signs wrote: > what size motor are we all talking about? > > Heath > ----- Original Message ----- > From: maldat <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, February 05, 2002 5:11 PM > Subject: Re: webers > > > 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]/ ---------------------------------------------------------------------
