Holley 4160
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Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
Holley 4160
1965 F100 Flareside; T18 w/ 289/302. been primary work horse for past 45 years.
Few days ago started for town when engine started bucking and surging, immediately turned around but only got 100 yards from home before calling tow service. The truck runs but unable to accelerate w/ out stalling.
After spraying carburetor cleaner in various ports engine ran fine, Rather than take a change ended up disassemble and clean important components and not a complete rebuild. Due to Ca. toxic gasoline find about every 5 years repairing carburetor is required.
Question;::
Had an unopened carburetor rebuild kit but it does not include replacement jets. The original jets are 66's but I have an unopened pack of 68 jets, Not sure if there would be any significant difference; faced with dilemma whether to stay with the 66's or replace with the 68's??
Comments/Suggestions appreciated!!
Few days ago started for town when engine started bucking and surging, immediately turned around but only got 100 yards from home before calling tow service. The truck runs but unable to accelerate w/ out stalling.
After spraying carburetor cleaner in various ports engine ran fine, Rather than take a change ended up disassemble and clean important components and not a complete rebuild. Due to Ca. toxic gasoline find about every 5 years repairing carburetor is required.
Question;::
Had an unopened carburetor rebuild kit but it does not include replacement jets. The original jets are 66's but I have an unopened pack of 68 jets, Not sure if there would be any significant difference; faced with dilemma whether to stay with the 66's or replace with the 68's??
Comments/Suggestions appreciated!!
Laughing Gas
Joined: Oct 2007
Posts: 946
Likes: 100
Not for the faint of heart , but you could drill the 66 to a 67 if you so desire .
personally unless you are running lean , I use a vacuum gauge , try the 68 ...see what the tail pipe tells you .
should be a light to medium gray .
personally unless you are running lean , I use a vacuum gauge , try the 68 ...see what the tail pipe tells you .
should be a light to medium gray .
Thread Starter
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Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
Went with the 68's although 1st attempt fuel bowl transfer tube leaked like a sieve. Replaced the tube reassembled and now runs okay but still needs fine tuning. I may go back to the 66 jets, have not decided yet?
Appreciate the comment/suggestion
PS/ after fine tune decided to stay with the 68's
Appreciate the comment/suggestion
PS/ after fine tune decided to stay with the 68's
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