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7,105 Posts
Gents,
As reported previously we ended up getting all major oil leaks fixed, steering box seal done per Roadtrip's write-up (except that I could only withdraw the shaft rod up about 2 inches, more than enough to swap the rock hard seal out). Spica gap is 0.019 ; long rod in; short rod in, manometer readings are really close on all 4 sides (about an inch of mercury delta between the two pairs), etc. Mixture seems good, perhaps a smidgen rich but that's OK by me on a fresh motor -- its not rich enough that I can smell it.
Car is stock 74 GTV refreshed with rings and rod bearings due to a leaky Spica a few years ago. Cams are 10548's, set to about 105 ish degrees. Valve clearances are also good at a hair less than 20 thou. SPica is Wes Ingram HP pump that he knew I was running stock pistons and euro cams. Distributor timing is set to about 4 degrees advanced from stock mark. I get close with M mark at 5K RPM but doesn't quite make it there. Dwell gap set right on the button with feeler gauge.
Car dies when coming to a stop. Its dangerous and annoying to have to do the complete key turn off, and turn on, when the light is green in front of me and I have SoCal motorists on my tail. I can not get much out of the idle adjustment screw (new O-ring installed). Idle just seems low and hence, car dies at stopsigns and stoplights.
Second, there is a momentary miss under hard accel. It misses two beats on the way up (like a missing spark on one rev) then goes great.
Seeking advice about setting timing (should I advance it some more?) -- seems to help the idle speed and levels it out ; what other suggestions to get the idle up and stable?
Thanks ! Car is beginning to take shape and hopefully can be a daily driver (once I get this idle thing solved - its really dangerous to have that where I live)
As reported previously we ended up getting all major oil leaks fixed, steering box seal done per Roadtrip's write-up (except that I could only withdraw the shaft rod up about 2 inches, more than enough to swap the rock hard seal out). Spica gap is 0.019 ; long rod in; short rod in, manometer readings are really close on all 4 sides (about an inch of mercury delta between the two pairs), etc. Mixture seems good, perhaps a smidgen rich but that's OK by me on a fresh motor -- its not rich enough that I can smell it.
Car is stock 74 GTV refreshed with rings and rod bearings due to a leaky Spica a few years ago. Cams are 10548's, set to about 105 ish degrees. Valve clearances are also good at a hair less than 20 thou. SPica is Wes Ingram HP pump that he knew I was running stock pistons and euro cams. Distributor timing is set to about 4 degrees advanced from stock mark. I get close with M mark at 5K RPM but doesn't quite make it there. Dwell gap set right on the button with feeler gauge.
Car dies when coming to a stop. Its dangerous and annoying to have to do the complete key turn off, and turn on, when the light is green in front of me and I have SoCal motorists on my tail. I can not get much out of the idle adjustment screw (new O-ring installed). Idle just seems low and hence, car dies at stopsigns and stoplights.
Second, there is a momentary miss under hard accel. It misses two beats on the way up (like a missing spark on one rev) then goes great.
Seeking advice about setting timing (should I advance it some more?) -- seems to help the idle speed and levels it out ; what other suggestions to get the idle up and stable?
Thanks ! Car is beginning to take shape and hopefully can be a daily driver (once I get this idle thing solved - its really dangerous to have that where I live)