Quote:
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Originally Posted by priobe
68GT500,
From what I could see, you setup is not leaner than mine.
idle 65
holder 110
In my setup I am running
65 idle
135 holder
with 42 chokes - my setup seems leaner
I am still leanering about this but correct me if I am wrong
you are running
F7 tube - which is a richer tube than the F-11 & F-16
Your 120 air corrector w/ 140 main
Mine 210 air corrector w/ 180 main
The air corrector is only used at 4000 rpm and above and even than yours is running richer.
Help me understand if I am understanding this correctly or if I am wrong.
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Priobe, I can see that your understanding of Weber fuel /air flow path's is somewhat flawed.
Take your Idle circuit for example; 65 jet(fuel)- 135 holder(air) is leaner than the setting of 68GT500--65jet(fuel)-110 holder(air). While both jets are the same size your 135 air allows more air to be introduced in the emulsification process.
On your main circuit, similar thing-you have:180jet(fuel)-210 corrector(air), Yes you have a large jet,but you also have a larger corrector @210 which will lean it out where 68GT500: 140 jet(fuel)-120 corrector (air) tends to pull more on the fuel due to the smaller air corrector. His system will start to flow fuel earlier due to the smaller AIR (RICH) while yours will be later due to the larger air (LEAN)- your larger 42mm choke size also gives a weaker signal to both air &fuel.
Now that was ONLY to give you a basic understanding of how & why. Every change you make affects another part of the system so one change at a time please!! I will need your: Bore-Stroke-Cam Specs-Comp Ratio to give a ballpark start point plus an HONEST idea of how you drive the car and RPM range you use.
Not sure what you mean with MSD not operating until 3000. Dist weights control advance curve-not MSD.
Jac Mac