D
Doug St. Clair
Guest
"[url=""]www.thedougout.com/P1
"www.thedougout.com/P1010116.JPG
Well, I'm going on just over a year with my newly rebuilt '68 Ford 427. It's still not running "just right". Two things I've noticed - when I get in the upper RPMs (3000 - 3500), the rpms tend to bounce up and down. I'm thinking this may be related to the new carb I'm using (autolite 2100), which has a vacuum secondary (instead of my old 4300 that had a mechanical). Is is possible the secondaries are opening at the low range (3000 RPMs) then closing back down at the higher ranger (3500 RPMs)? I also suspect a "clicking" sound when running at the high RPM - but can't pinpoint it.
The other thing... if I run the engine at high RPMs for a few secs (10 or so), I can't get the thing to behave back at idle (650 RPM). I typically have to hold the throttle open a bit while I disengage the transmission. If I try to re-engage the engine at the idle speed, the engine coughs out. This usually lasts 5 minutes or so, then everything seems normal again. It wouldn't appear the temp is the issue, as I can get it to the same temp at lower RPMS without the same situation occuring.
FYI - I also switched to an MSD ignition setup.
I'm just trying to get this thing to run *right* so I can forget about it for awhile. It doesn't run as well as it did before the rebuild, but I figure it's just a "tuning" issue. Is it timing? Should I try a different carb?
Any help is appreciated!!
Doug"
"www.thedougout.com/P1010116.JPG
Well, I'm going on just over a year with my newly rebuilt '68 Ford 427. It's still not running "just right". Two things I've noticed - when I get in the upper RPMs (3000 - 3500), the rpms tend to bounce up and down. I'm thinking this may be related to the new carb I'm using (autolite 2100), which has a vacuum secondary (instead of my old 4300 that had a mechanical). Is is possible the secondaries are opening at the low range (3000 RPMs) then closing back down at the higher ranger (3500 RPMs)? I also suspect a "clicking" sound when running at the high RPM - but can't pinpoint it.
The other thing... if I run the engine at high RPMs for a few secs (10 or so), I can't get the thing to behave back at idle (650 RPM). I typically have to hold the throttle open a bit while I disengage the transmission. If I try to re-engage the engine at the idle speed, the engine coughs out. This usually lasts 5 minutes or so, then everything seems normal again. It wouldn't appear the temp is the issue, as I can get it to the same temp at lower RPMS without the same situation occuring.
FYI - I also switched to an MSD ignition setup.
I'm just trying to get this thing to run *right* so I can forget about it for awhile. It doesn't run as well as it did before the rebuild, but I figure it's just a "tuning" issue. Is it timing? Should I try a different carb?
Any help is appreciated!!
Doug"