Weber selection and initial jet tuning

[blodi]

Put my 175 correctors in for a 165/175 combo...it's certainly richer and looks good for a while and then starts going leaner as RPM raise. I forgot my SD card today so I can't get a log.  I will try tomorrow. 

[240260280]

Smaller mains and smaller air will help.

 

Sounds like a significant change! Great!  Now to tame it ?

Edited September 27, 2018 by 240260280

[blodi]

Wouldn't a smaller main make it even leaner? Right now I'm running what is essentially the "richest" combo I have. 165 main is the largest I have and 175 corrector is the smallest. 

[240260280]

If the tube is too rich ~ 3000-4000 then reducing main will lean across whole band.  Reducing air should  enrich across the whole band but less at 5000- 7000.  Just trying to figure out how to deal with your findings.

 

Lets wait to see a plot.

 

[blodi]

Ok, F19 165/175....I gotta say...pulls really good!  My RPM sensor obviously went MIA in the first two runs. 

92818-1 by blodi, on Flickr

92818-2 by blodi, on Flickr

92818-3 by blodi, on Flickrvvvvvv

[240260280]

WOW THAT LOOKS SWEET 11.5 to 13.5... RIGHT where it should be.  13.0 +/- 0.5 for most of the run then dropping to 12.5 at the high end.... WOW WOW WOW.

I am painting inside right now.  I'll try to plot tomorrow.  Hold there. it looks great!

 

Edited September 29, 2018 by 240260280

[240260280]

You know this thread started Oct 2016... two years of work, down time for the head problems, so many runs and Etube changes and we finally seem to have nailed the 45DCOE on larger L engines. 

Perseverance and finally a gift to the Z folks out there! F19 eTubes are the cat's meow! ??

Cheers and a big thanks for your hard work! YIPEEE YAAAAHOOOO

[Duffman]

Impressive results!  Congrats, for all the efforts!!

[240260280]

Two coats on the dining room and Janet is happy!

 

The only thing left to play with is to mess with the acceleration circuit as you see fit.

You can try to quench that common lean gasp at the start. You know the parts and what they do so I'll leave it to you now that you are a Weber Experten! ?

Edited September 29, 2018 by 240260280

[gundee]

Look at the fuel and air jet you ended up at now. Almost the same as post number 1. That is more of a wow to me!

[240260280]

24 minutes ago, Lumens said:

Look at the fuel and air jet you ended up at now. Almost the same as post number 1. That is more of a wow to me!

 

 

What you mean?

Edited September 29, 2018 by 240260280

[240260280]

F19  165/175

 

Range of 1.7 points.

 

Note: this is close (but better) than the elusive June 28, 2017 plot that suddenly went too rich on subsequent runs. It was never repeated. The configuration then was (F16 165/215).... so the F19 runs leaner than the F16 and needs a smaller air corrector.

Edited September 29, 2018 by 240260280