John, I think we're agreeing, just in a different manner. :*) If you calculate for 100% VE and knowing you'll only get 75%-80%, no problem. Who makes a 362cfm (or whatever) carb anyway, right? What I was trying to get across was that if you calculate for a realistic cfm carb, you'll only overcarb a little bit (say a 390 Holley or 500 Edelbrock) instead of the 100% which might lead you to overcarb to say, a 700 or 750.
Shoot, if everyone thought alike and built the same cars...we'd all be clones. :*) Dale McIntosh I've stopped 1,583 spam messages. You can too! One month FREE spam protection at http://www.cloudmark.com/spamnetsig/ > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of John Nasta > Sent: Wednesday, February 25, 2004 9:42 AM > To: The Chevelle Mailing List > Subject: RE: [Chevelle-list] Malibu Carb question > > Right, you can calculate for 100% VE and you probably won't > get it, but if you calculate for 75% VE you definitely won't > get it. You probably wouldn't even get the 75% you think you > are trying to get because VE is influenced by more than just > the carburetor. > > Again, the key is to *be realistic* about what RPM you want > to try to get 100% VE at. This is precisely why a 600 CFM is > overkill on a 283 street engine. You would have to be running > at over 7000 RPM to attempt to get 100% VE. > > I still disagree with you. I think you should get the > carburetor that will give you 100% VE at a reasonable RPM > according to the formula. It's true that you might not get > the whole 100%, but I think you'll get a higher percentage > than you would out of a carb that you know in advance can't > give you more than 75% even with everything else being optimal. > > John Nasta > > > > -----Original Message----- > > My point is that you can calculate for 100% VE but, in > reality, you'll probably never achieve it in a day-to-day > car. So, why fool yourself into thinking you can run a > larger carb at a higher RPM than you can really use? > It's not a point of choosing a carb that'll only "get" you > 75%, it's choosing a carb that'll make the most of the 75% > you'll probably achieve. > Even at 80% to 85% VE with the same basic engine, you're > looking at 360cfm to 380cfm range. It's like selecting a > camshaft, bigger sounds better (i.e., .580 lift at 320� > duration) when a .490 lift and .295� duration will > make your car drivable. I'd just say to give it some > thought and don't run > out and buy the biggest or most popular combo out there...it > might not work for you. :*) > > Dale McIntosh > > I've stopped 1,542 spam messages. You can too! > One month FREE spam protection at http://www.cloudmark.com/spamnetsig/ > > > > >
