how rich are you?

Post subject: how rich are you? Posted: Mon Nov 24, 2008 08:27 PM

when it gets cold out at night, i stat having issues.
valves, points and all that are good.
i still get backfires at low rpms when driving and can't get past 55 mph.
how should i adjust my cab to get the mixture correct?

Post subject: Re: how rich are you? Posted: Mon Nov 24, 2008 09:24 PM

Are you running preheat tubes?

Blaine

Post subject: Re: how rich are you? Posted: Mon Nov 24, 2008 10:40 PM

What kind of airfilter? The non oilbath types can also freez up the carb. I can use them only in summer in Holland when temps are 20Â°C and up.

Post subject: Re: how rich are you? Posted: Wed Nov 26, 2008 11:00 PM

no heaterboxes...
just a plain filter from BAP. cotton gauze, i think

Post subject: Re: how rich are you? Posted: Thu Nov 27, 2008 01:28 AM

try jetting your carb so it is leaner. that well help bring up the temp if your running a oil cooler get a thermostatic bypass so that way its not always running through the cooler. try those things let me know goodluck

Post subject: Re: how rich are you? Posted: Thu Nov 27, 2008 03:41 AM

i do have an external oil cooler and altogether (engine, filter, cooler and lines) hold about 4.5 qurts.
i was starting to wonder if i could run tooo coool...

Post subject: Re: how rich are you? Posted: Thu Nov 27, 2008 05:00 AM

I THINK YOU HAVE INTAKE PROBLEMS,,MINE WOULD FROST UP TILL IT GOT WARMED UP,THE FUEL DONT MIX WELL IN INTAKE WHEN COLD,HENCE THE BACK FIRE THRU CARB,,I USED TO SPRAY WD40 ON INTAKE JUST UNDER CARB,THEN IT WOULD,NT FREEZE UP AND RAN BETTER WHEN COLD,,AIR RUSHES PRETTY fast DOWN THE INTAKE,,IT HELPED ME,,TRY IT WHAT COULD IT HURT,,WIPES RIGHT OFF,,JUST MY TWO CENTS

Post subject: Re: how rich are you? Posted: Sat Nov 29, 2008 06:48 AM

mine likes to sputter in the 5 and 6am hours with this nice chilly air!

once I let it warm up at idle out front I nurse it to the freeway and open it up! once rolling theres no issues!...

ohhh crap , I have a freeway flyer trans Wink

Post subject: Re: how rich are you? Posted: Sat Nov 29, 2008 09:38 AM

redid the valves again tonight and it sounds better. kind of snappy...
found out the #2 exhaust port rocker arm is contacting the valve= possiblity of constant backfire.
i took the adjusting screw all the way out and still no gap.

anybody know why this might happen?

Post subject: Re: how rich are you? Posted: Sat Nov 29, 2008 08:33 PM

Sounds like mabey the valve is stuck??

Post subject: Re: how rich are you? Posted: Sat Nov 29, 2008 09:57 PM

thinking so. no clearance between valve and rocker arm. but why would the arm ever get so close to the valve that it would contact?
spacer missing?

Post subject: Re: how rich are you? Posted: Mon Dec 01, 2008 11:55 PM

nube_w_1970baja wrote:

thinking so. no clearance between valve and rocker arm. but why would the arm ever get so close to the valve that it would contact?
spacer missing?

Not to scare you, but I have read in the rebuilding your ACVW book, the valve is stretching and should be replaced before the head comes off. Luckily the valves are cheap. I would plan for that as soon as possible.

Post subject: Re: how rich are you? Posted: Tue Dec 02, 2008 12:26 AM

nube_w_1970baja wrote:

thinking so. no clearance between valve and rocker arm. but why would the arm ever get so close to the valve that it would contact?
spacer missing?

Not to scare you, but I have read in the rebuilding your ACVW book, the valve is stretching and should be replaced before the head comes off. Luckily the valves are cheap. I would plan for that as soon as possible.