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jet sizes Weber prog.
Posted: Thu Oct 29, 2015 8:13 am
by dingo
Anyone have tips on jet sizes for a center-mounted progressive carb on type 4 2L ?
pilot, mains, air....i would like to eliminate the stumble during progression
Re: jet sizes Weber prog.
Posted: Thu Oct 29, 2015 5:25 pm
by Amskeptic
dingo wrote:Anyone have tips on jet sizes for a center-mounted progressive carb on type 4 2L ?
pilot, mains, air....i would like to eliminate the stumble during progression
Ewwwww. We don't EVEN know the BRAND of this exercise in "progressive" (it's not, it is reactionary) futility.
You can't know what jet sizes would cure an ailment intrinsic to the compromised engineering unless you have fully fully fully warmed every inch of that chromed monstrosity on a day well above the dewpoint of evaporating fuel.
Once this this this contraption is fully warm, you will know if the jet sizes are acceptable if the mixture is responsive to the mixture screw somewhere between 1/2 and 3 turns.
You also have to know (and by telling us, we'll know that you know) the timing map from idle to 3,500 rpm.
We need idle timing 1,200 rpm, 1,700 rpm, 2,400 rpm and 3,500 rpm. Don't forget to share little gems like:
type of distributor
vacuum advance can
is this a stock configuration engine with stock cam and valves?
Colin
Re: jet sizes Weber prog.
Posted: Thu Oct 29, 2015 7:29 pm
by dingo
man I just stick my toe in the water and the great white comes around smelling blood !! yes yes the data will be forthcoming...just thought id see if anyone was quietly running of these much maligned carbs...i.e. looking for ballpark sizes to start from...1600 or 2L or both .
The arguments pro and con are well trodden.....but my experience in the past has been pleasant ....im up for the challenge to dial one of them in for the road
Re: jet sizes Weber prog.
Posted: Fri Oct 30, 2015 12:42 pm
by Amskeptic
dingo wrote:man I just stick my toe in the water and the great white comes around smelling blood !! yes yes the data will be forthcoming...just thought id see if anyone was quietly running of these much maligned carbs...i.e. looking for ballpark sizes to start from...1600 or 2L or both .
The arguments pro and con are well trodden.....but my experience in the past has been pleasant ....im up for the challenge to dial one of them in for the road
Go fer it. I have driven some nice progressive carburetor equipped engines after the first ten minutes of whinebaby complaining.
Why would you settle for that horrid accelerator pedal progession on those over-strained under leveraged throttle levers? Anyways . . .
SharkyInMaconGA