66 E100 Pickup
Famous Member
ok guys I have to get my '66 Econ Pickup w/ the 200 running ok so I can haul the 240 block on my project truck to the machinist.
I am positive I have a mismatched dizzy and carb.
The engine is likely a '69 200. It has the 1 3/4" throat on the intake, with the 2 3/4" bolt separation. Like an ignorant dummy I saw that the '66 240 truck had the same throat opening/bolt pattern, so I ordered up an 1101 with SCV. Now this was many years ago, at the time there were no issues with vacuum as we were not allowed to run vacuum in California on these trucks because of the NOx kits required by CARB. They even poked a hole in the vacuum diaphram just to make sure you didn't rehook around the block :x
When CARB stopped caring about my truck, I got a new distributor, I believe it was a 68 Loadomatic. It has the single vacuum advance, with two adjuster springs of different strengths. The engine ran much better with some advance, but it ran up the advance into the upper 20's and really pooped out at higher RPM. Lately, the advance plate has taken to "sticking" at the high, maximum advance mode, which pretty much kills engine performance until it gets popped back.
So, my thought is to plug up the SCV port. There is a big opening just under the throttle plate in the venturi near the SCV valve. Is this the correct one to plug off? I can also plug off the SCV entrance opening that comes from this port. It is just outboard of the threads. If I understand this right, doing it there will still leave me manifold vacuum to the dizzy from the SCV port, but just not through the SCV. Is this the better spot to plug off?
Thanks,
John
I am positive I have a mismatched dizzy and carb.
The engine is likely a '69 200. It has the 1 3/4" throat on the intake, with the 2 3/4" bolt separation. Like an ignorant dummy I saw that the '66 240 truck had the same throat opening/bolt pattern, so I ordered up an 1101 with SCV. Now this was many years ago, at the time there were no issues with vacuum as we were not allowed to run vacuum in California on these trucks because of the NOx kits required by CARB. They even poked a hole in the vacuum diaphram just to make sure you didn't rehook around the block :x
When CARB stopped caring about my truck, I got a new distributor, I believe it was a 68 Loadomatic. It has the single vacuum advance, with two adjuster springs of different strengths. The engine ran much better with some advance, but it ran up the advance into the upper 20's and really pooped out at higher RPM. Lately, the advance plate has taken to "sticking" at the high, maximum advance mode, which pretty much kills engine performance until it gets popped back.
So, my thought is to plug up the SCV port. There is a big opening just under the throttle plate in the venturi near the SCV valve. Is this the correct one to plug off? I can also plug off the SCV entrance opening that comes from this port. It is just outboard of the threads. If I understand this right, doing it there will still leave me manifold vacuum to the dizzy from the SCV port, but just not through the SCV. Is this the better spot to plug off?
Thanks,
John
