Craig, In my opinion 2 x 40mm DCOE's are fine for a mild L18 as either twin 40's or 45's would be choked down to 36mm or 38mm anyway. 45's have a certain prestige factor attached to them and the most delightful induction noise you'll ever hear but really very little in the way of extra performance over 40's so I'd see what comes up and go from there. The manifold that you get will give you more in the way of driveable power especially if it's port matched eg Datrally. Tuned headers are fine eg HM21RC, again not much in the way of increased performance over the cast SSS manifold but they sound great. 2.25" exhaust is also fine for either size but use good quality mufflers. I like Walkers mainly because they are not too exy, flow reasonably well and have a good life span in my climate (Canberra which is cold and we get a lot of condensation which kills cheap mufflers) so I guess I'm saying I've found them to be good value for money. There are other good ones out there (I've also had good life out of Rapid and to a lesser extent Lukey) that do the job in the medium price range.
A couple of things to consider: With DCOE's more often than not you'll need to budget in a dizzy re-curve as you don't usually run a vacuum advance unit with them, although with some engines you can get away without having to do this. If you can't get a set that's pretty much setup then ppl that know how to tune them are getting rare. Parts for webers are exy and a little hard to find if you're not in a cap city. regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Craig Guppy Sent: Monday, 10 December 2001 9:47 PM To: [EMAIL PROTECTED] Subject: carbies list, i'm looking to upgrade my carbies from SU's to Webers soon. i've got an L18, medium street cam (powerband 3000-6500rpm), and ported and polished. i'm not sure whether to get twin sidedraft 40s or 45s (would 45s be too much carb for the engine?). i also want to put extractors on. should i do this first before changing the carbies? and if so will a 2 and a quarter inch exhaust be enough. any help you can give would be appreciated. craig _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp --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]/ ---------------------------------------------------------------------
