<VV> idle question 2

[J. R. Read]

Randy,  Where are you (and the elevation) and what is the highest octane gas 
at your local stations?

I'm a flatlander - IL (about 700 ft above sea level) and have 52 jets in my 
primary carbs and 51 in the secondaries.  This works for me on 93 octane.  I 
still deal with a minor stumble on the 140 (convert) at partial throttle 
when accelerating - like from 30 to 40 or 45 mph.  I fix that by pressing 
harder on the skinny pedal.  The 110 (in the FC) has no such problem.  Both 
are 4 spd - but different gearing and throws involved.  FC is "mystery 
shifter."

If you cannot get anything above 92 octane on a regular basis, 53 might be 
just right for you.  Unfortunately, there might be a bit of experimentation 
involved.

BUT...  Pay attention to Matt's comments before anything else.

Later, JR

----- Original Message ----- 
From: "Randy Hook via VirtualVairs" <virtualvairs at corvair.org>
To: <virtualvairs at corvair.org>
Sent: Wednesday, July 09, 2014 9:43 PM
Subject: <VV> idle question 2


>
> I have more info on the poor idle situation with the '60 w/ '64'110(with 
> headers)/4spd. I don't have any vacuum leaks. The vacuum advance worked 
> like the ones on the
> other 2 Corvairs I have. I tried the known good carbs off of my 110 in the 
> '63 ragtop. (The first carbs had 51 jets and the known good ones had 50's)
> The idle smoothed out for the most part. Ah ha! A clue. Then, when I took 
> it out for a test drive, it acted the same as with the other carbs. When 
> accelerating slowly, they work ok. BUT when you go around a corner and hit 
> the gas to "jack rabbit start", it coughs and sputters and pops all over 
> the place. BUT, when you take your foot off of the gas and just gradually 
> feather in the pedal it runs just fine. If you accelerate slowly and 
> smoothly you can cruise down the local interstate at 65 or 70 with no 
> trouble.
> Now, at a cruise-in the other night I was sharing all this with a friend. 
> I told him there is nothing left to check or change but the fuel pump and 
> carb jets. But, if it
> was the fuel pump, how could I cruise down the interstate at 70 with no 
> problems? I asked him if he knew of a way to tell if your carb jets were 
> to small. He said
> yes. Somehow block the chokes half closed and see how it runs.
> Well, tonight I had to move the car across the driveway. The engine was 
> stone cold not having been run in a week. Imagine my surprise when I 
> started it (carbs with
> 51 jets and the chokes closed) the CAR IDLED PERFECTLY!!!!!!!!!!!!! Smooth 
> as silk. Then, as it warmed up and the chokes opened, back to the same 
> crap. Probably the same thing that happened with the other (50 jet) carbs
> My second question is this: This sure does point to the jets being too 
> small, right? Sounds logical to me. I thought about putting in #53's. I 
> saw something in the
> Clark's catalogue about using jets a size bigger because of today's crappy 
> gas. I only want to do this job once, so any and all thoughts and opinions 
> welcome.
> Thanx.
>
> Randy (Cap'n) Hook
> '60 700 4dr '64'110/4spd
> '63 ragtop 110/pg
> '65 Monza 4dr 84/pg
>
> _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are 
> the property
> of the writer, please attribute properly. For help, 
> mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America, 
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options: 
> http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________ 


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com