<VV> Strange miss or hesitation

[Russ Moorhouse]

I'm not using the sintered-bronze filters, but I do have the newer stainless 
steel mesh type installed.

Russ Moorhouse
'65 Corsa coupe 140 HP
Group Corvair Member
Corsa Member
Kent Island, MD


----- Original Message ----- 
From: "N. Joseph Potts" <pottsf@msn.com>
To: "Russ Moorhouse" <corvair65@verizon.net>; "VV" 
<virtualvairs@corvair.org>
Sent: Friday, December 31, 2004 10:24 PM
Subject: RE: <VV> Strange miss or hesitation


> One wild idea: you mention an in-line fuel filter. Are the original
> sintered-bronze filters ALSO in place? If not, you could get flooding as
> hydrodynamics from the fuel pump occasionally overwhelm the float valves.
> Yes, I'm making this up, but see if the shoe fits.
>
> Joe Potts
> Miami, Florida USA
> 1966 Corsa coupe 140hp 4-speed with A/C
>
> -----Original Message-----
> From: virtualvairs-admin@corvair.org
> [mailto:virtualvairs-admin@corvair.org]On Behalf Of Russ Moorhouse
> Sent: Friday, December 31, 2004 9:48 PM
> To: VV
> Subject: <VV> Strange miss or hesitation
>
> With the temp almost to 60 degrees here along the Chesapeake Bay, I 
> decided
> to take "Stinky" out for a spin and charge up the battery.  I haven't 
> driven
> it much this summer, mostly due to carburetor issues I was having.  It
> really wasn't until last month that I got them somewhat synched by hand. 
> I
> haven't had a chance to use my uni-sync to fine tune them or set the cold
> idle properly.
>
> But she did startup and after a minute or so of me feathering the idle 
> while
> cold, she was off and running.  The last time I drove her I noticed a
> sometime miss or hesitation  between 3000 and 4000 rpm, so today I decided
> to see if I could further diagnose that problem.  After getting her good 
> and
> warmed up I ran her hard through the gears.  First gear she went up to 
> 4500
> rpm with out any problems, when I shifted into second and gassed it,
> immediately I noticed the problem and it was bad to the point and being
> noisy.  I couldn't tell if it was backfiring or what it was doing.  I
> shifted into third and it went away, but I noticed a slight miss in the
> usual range, but not anything like it was in 2nd gear.  In 4th gear she 
> was
> running fine around 3000 to 4000 rpm, but I was accelerating slowly at 
> that
> point, because I was way above the posted speed limit at that point.  A
> pickup pulled out in front of me and I backed off. but he accelerated
> quickly so I left it in 4th and just floored it.  The tach was right at 
> 3000
> rpm and I noticed the problem occur.  I back off the gas some and it went
> away and continued to accelerate smoothly as long as I didn't floor it.
>
> It was worst was in second gear, never noticed it in first and was slight 
> in
> third and fourth.
>
> What's been done: Four Wolf premium rebuilt carbs, new 8mm Seth wires, new
> plugs (Bosch), new fuel pump, in line filter and fuel lines.  Pertronix
> IgnitorII with 12V going to it as shown on the instructions and 
> Flamethrower
> II coil.  Rebuilt heads.
>
> Anyone have an idea what the problem may be?    I'm thinking it's more 
> fuel
> system related than electrical, since it seems to bog down when floored.
>
> Russ Moorhouse
> '65 Corsa coupe 140 HP (Stinky)
> Group Corvair Member
> Corsa Member
> Kent Island, MD