1965 Holley Carb… Help!
#21
Melting Slicks
Wow, haven't heard THAT name in awhile. One last suggestion. Other than the fuel line, it's not a bad idea to run another, smaller throttle spring, inside the large one to avoid a stuck throttle due to a broken spring.
BTW, the motor must have been warm when you took that last set of pics and choke is most definitely opening.
BTW, the motor must have been warm when you took that last set of pics and choke is most definitely opening.
Last edited by Gary's '66; 08-23-2014 at 01:40 PM.
#22
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#23
Drifting
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Kerouac - the owners reviewing your questions are some of the best - IMO
I have a general question about the 2nd and 3rd pictures taken from the passenger side.
- It appears there is a pcv valve under the choke coil/above the rocker cover.
On my 65' - L79 the hose from the oil fill goes to the metered 90* fitting above the throttle linkage, and there is no PCV valve.
Kerouac's is routed from the 90* fitting around the back of the Holley to the PCV then engine oil fill.
Is the PCV valve an add on? - is it doing anything in this arrangement?
Is the 90* a metered 90* fitting - any issue with this arrangement not venting the crank case correctly?
Phil
I have a general question about the 2nd and 3rd pictures taken from the passenger side.
- It appears there is a pcv valve under the choke coil/above the rocker cover.
On my 65' - L79 the hose from the oil fill goes to the metered 90* fitting above the throttle linkage, and there is no PCV valve.
Kerouac's is routed from the 90* fitting around the back of the Holley to the PCV then engine oil fill.
Is the PCV valve an add on? - is it doing anything in this arrangement?
Is the 90* a metered 90* fitting - any issue with this arrangement not venting the crank case correctly?
Phil
Last edited by 856666; 08-23-2014 at 01:44 PM.
#24
Melting Slicks
#25
Pro
Thread Starter
Kerouac - the owners reviewing your questions are some of the best - IMO
I have a general question about the 2nd and 3rd pictures taken from the passenger side.
- It appears there is a pcv valve under the choke coil/above the rocker cover.
On my 65' - L79 the hose from the oil fill goes to the metered 90* fitting above the throttle linkage, and there is no PCV valve.
Kerouac's is routed from the 90* fitting around the back of the Holley to the PCV then engine oil fill.
Is the PCV valve an add on? - is it doing anything in this arrangement?
Is the 90* a metered 90* fitting - any issue with this arrangement not venting the crank case correctly?
Phil
I have a general question about the 2nd and 3rd pictures taken from the passenger side.
- It appears there is a pcv valve under the choke coil/above the rocker cover.
On my 65' - L79 the hose from the oil fill goes to the metered 90* fitting above the throttle linkage, and there is no PCV valve.
Kerouac's is routed from the 90* fitting around the back of the Holley to the PCV then engine oil fill.
Is the PCV valve an add on? - is it doing anything in this arrangement?
Is the 90* a metered 90* fitting - any issue with this arrangement not venting the crank case correctly?
Phil
#27
Pro
I don't see the clean air hose that plugs to the nipple on the underside of the air cleaner and goes to a tube between the RH exhaust manifold and the cyl head. This shows well in 65tripleblack's photo, and is just rearward of the hot air (return) tube that goes to the choke stove. Otherwise, there is no filtered cold feed to the exhaust manifold internal tube, is then heated, and goes from there to the choke. Over time, this could impact operation of the choke piston, etc.
#28
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Can't see in the photos with the upper ignition shield in place, but you apparently have an MSD distributor without a vacuum advance unit, which seriously compromises the ability to tune the engine properly, particularly at idle and city traffic speeds, and will cause it to run hotter than normal at those speeds. You need a distributor that has/accepts a vacuum advance unit, connected to a full manifold vacuum source. What you have now is a Bubba "hot-rod" distributor added by mistake by a previous owner.
Your PCV system has a double restriction - the black hose that runs around the back of the carburetor, then forward on the right side to the oil fill tube, has a silvery PCV valve spliced into it; 65's didn't use a PCV valve - that metering restriction is already built into the 90* brass fitting at the driver's side of the carburetor, so the (added) PCV valve isn't seeing manifold vacuum. See the photos below of a '65 like yours for proper installation/routing of the PCV hose and the vacuum advance line from the carburetor to the distributor.
Your PCV system has a double restriction - the black hose that runs around the back of the carburetor, then forward on the right side to the oil fill tube, has a silvery PCV valve spliced into it; 65's didn't use a PCV valve - that metering restriction is already built into the 90* brass fitting at the driver's side of the carburetor, so the (added) PCV valve isn't seeing manifold vacuum. See the photos below of a '65 like yours for proper installation/routing of the PCV hose and the vacuum advance line from the carburetor to the distributor.
Last edited by JohnZ; 08-23-2014 at 03:34 PM.
#29
Pro
Thread Starter
Can't see in the photos with the upper ignition shield in place, but you apparently have an MSD distributor without a vacuum advance unit, which seriously compromises the ability to tune the engine properly, particularly at idle and city traffic speeds, and will cause it to run hotter than normal at those speeds. You need a distributor that has/accepts a vacuum advance unit, connected to a full manifold vacuum source. What you have now is a Bubba "hot-rod" distributor added by mistake by a previous owner.
Your PCV system has a double restriction - the black hose that runs around the back of the carburetor, then forward on the right side to the oil fill tube, has a silvery PCV valve spliced into it; 65's didn't use a PCV valve - that metering restriction is already built into the 90* brass fitting at the driver's side of the carburetor, so the (added) PCV valve isn't seeing manifold vacuum. See the photos below of a '65 like yours for proper installation/routing of the PCV hose and the vacuum advance line from the carburetor to the distributor.
Your PCV system has a double restriction - the black hose that runs around the back of the carburetor, then forward on the right side to the oil fill tube, has a silvery PCV valve spliced into it; 65's didn't use a PCV valve - that metering restriction is already built into the 90* brass fitting at the driver's side of the carburetor, so the (added) PCV valve isn't seeing manifold vacuum. See the photos below of a '65 like yours for proper installation/routing of the PCV hose and the vacuum advance line from the carburetor to the distributor.
#30
Pro
Thread Starter
I don't see the clean air hose that plugs to the nipple on the underside of the air cleaner and goes to a tube between the RH exhaust manifold and the cyl head. This shows well in 65tripleblack's photo, and is just rearward of the hot air (return) tube that goes to the choke stove. Otherwise, there is no filtered cold feed to the exhaust manifold internal tube, is then heated, and goes from there to the choke. Over time, this could impact operation of the choke piston, etc.
#31
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St. Jude Donor '14
Hi Kerouac
My garage and interior has a gas smell due to my 65 L79 Holley -it's a great aroma that some don't get.
In addition, the exhaust is a little sooty - like yours - but I have pulled the plugs and they are not sooty and it runs well so I am leaving it alone.
Small adjustments to the carb can go south quickly so keep good documentation if you adjust in case you need to put it back.
Phil
My garage and interior has a gas smell due to my 65 L79 Holley -it's a great aroma that some don't get.
In addition, the exhaust is a little sooty - like yours - but I have pulled the plugs and they are not sooty and it runs well so I am leaving it alone.
Small adjustments to the carb can go south quickly so keep good documentation if you adjust in case you need to put it back.
Phil
#32
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Thread Starter
"I love the smell of fuel in the morning. It smells like... victory."
#33
The fuel line from the filter is supposed to be rubber on the L76. Your PCV setup is screwy and unnecessary. Pull the brass L shaped fitting coming from the crankcase vent on the drivers side there in your picture. Check that it has a small orifice inside the threaded part that's .090 in diameter. That's effectively the PCV. reinstall it and swivel it around to face forward and run the hose directly to the oil filler tube. This will eliminate the extra hose wrapped around your carb and the unnecessary in line PCV valve. I had a post earlier today on this setup and got some help from John Z. This won't fix your odor problem but will earn you a few points for originality.
#34
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Kerouac,
While there may be a few tweaks that still need to be made the fumes/exhaust smell is, to a degree, just the nature of the beast. People these days aren't used to the smell of ANY exhaust fumes. You say the car is running "magnificently". My philosophy has always been "if it ain't broke don't fix it"! I say screw the neighbors, and just close the windows and run the a/c when the wife is riding along.
As far as the pics, the only thing I'd be concerned with is the rubber fuel line. I'd go hard line or at the very least put some shielding over it.
Gary
While there may be a few tweaks that still need to be made the fumes/exhaust smell is, to a degree, just the nature of the beast. People these days aren't used to the smell of ANY exhaust fumes. You say the car is running "magnificently". My philosophy has always been "if it ain't broke don't fix it"! I say screw the neighbors, and just close the windows and run the a/c when the wife is riding along.
As far as the pics, the only thing I'd be concerned with is the rubber fuel line. I'd go hard line or at the very least put some shielding over it.
Gary
My wife can always tell when I've taken the '65 out, as a result of the fumes it leaves in the garage.
#35
Pro
Thread Starter
The fuel line from the filter is supposed to be rubber on the L76. Your PCV setup is screwy and unnecessary. Pull the brass L shaped fitting coming from the crankcase vent on the drivers side there in your picture. Check that it has a small orifice inside the threaded part that's .090 in diameter. That's effectively the PCV. reinstall it and swivel it around to face forward and run the hose directly to the oil filler tube. This will eliminate the extra hose wrapped around your carb and the unnecessary in line PCV valve. I had a post earlier today on this setup and got some help from John Z. This won't fix your odor problem but will earn you a few points for originality.
#36
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Thread Starter
This was my thinking as well. Today's new cars are sanitary from a open fuel smell and emissions standpoint to a degree not known in 50 year old cars. Hard to quantify, but a certain amount of gas and fume smell is normal for these cars.
My wife can always tell when I've taken the '65 out, as a result of the fumes it leaves in the garage.
My wife can always tell when I've taken the '65 out, as a result of the fumes it leaves in the garage.
#37
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The kind of smell I'm talking about clings to my clothes after I drive. I'm really starting to think it's a fuel smell, which I why I have another thread going that started with me asking if my gas cap should be vented or not. Getting some good help over there, too. Thanks.
#38
Melting Slicks
Not to mention the extra heat.
#39
Ah....The smell that clings....it's all relative. Mine stinks too and clings and sometimes follows me into the house...along with the grin on my face when I get back from driving it.
#40
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Yes, John, I checked the weatherstrip/seal and it is in place and in good condition. Thanks for the heads up.