Precise adjustment of A/F ratio control would be performed concentrating on the point only today by actual test driving on VW 1302 Super Beetle today.
This is one of the most interesting step for me because this kind of procedure is not capable for recent computer controlled automobile, the privilege of a old one like my Bocar 34PICT3 carburetor equipped Beetle.
The combustion condition would be observed checking the color on the ceramic part of spark plugs after some running test.
I knew that the idle mixture condition affects on the position setting of automatic choke angular position.
Written in the evening:
Today I've selected some special drive course that I had not tried for long time, to Northern part of Kyoto, Miyama. Quite an empty road of round trip carried my Beetle back earlier than usual. Choosing a different path from an ordinal tour course may be one of the reason.
Just a little effort was required to decide the sweetest point on air volume adjusting screw on Bocar 34PICT3 carburetor equipped on VW 1302 Super Beetle. Twice of trial setting was enough to know the setting point of volume adjusting screw(smaller one).
2 plus 5/8 turn out from the most closed point was the result.
After obtaining the very best point, any jerky reaction on AD motor disappeared resulting comfortable gear changing on the trans-axle.
And the motor stop tendency after a down hill(utilizing engine braking effect), such kind of bad habit disappeared.
Engine noise during cruising itself changed into mild and comfortable one. How come? I did this Beetle as long as 7,000km without serious carburetor adjustment?
Finding out the lateral offset on the wheel alignment, frontal wheel is adjusted too much out side to establish the 20minutes negative camber application, of course the strut upper mount point was so adjusted as to come inside at the same time.
The countermeasure for this unbalanced alignment is to make the left frontal wheel outside position on the same as the frontal right side. Of course the strut upper mount must be moved out side at the same time to keep the original negative camber value. I think this intention better this time on Beetle than adjusting rear total toe vector direction.
This kind of discrepancy on lateral offset may take time to be corrected firmly, remembering the former automobile EP82 TOYOTA Starlet with rear axle fixed 3 linked trailing arm with lateral arm constructive design, finally finding out the critical problem, being soldered rear hub case construction with firm and solid fixation but irregular rear negative cambers.
The combustion condition would be observed checking the color on the ceramic part of spark plugs after some running test.
I knew that the idle mixture condition affects on the position setting of automatic choke angular position.
Written in the evening:
Today I've selected some special drive course that I had not tried for long time, to Northern part of Kyoto, Miyama. Quite an empty road of round trip carried my Beetle back earlier than usual. Choosing a different path from an ordinal tour course may be one of the reason.
Just a little effort was required to decide the sweetest point on air volume adjusting screw on Bocar 34PICT3 carburetor equipped on VW 1302 Super Beetle. Twice of trial setting was enough to know the setting point of volume adjusting screw(smaller one).
2 plus 5/8 turn out from the most closed point was the result.
After obtaining the very best point, any jerky reaction on AD motor disappeared resulting comfortable gear changing on the trans-axle.
And the motor stop tendency after a down hill(utilizing engine braking effect), such kind of bad habit disappeared.
Engine noise during cruising itself changed into mild and comfortable one. How come? I did this Beetle as long as 7,000km without serious carburetor adjustment?
Finding out the lateral offset on the wheel alignment, frontal wheel is adjusted too much out side to establish the 20minutes negative camber application, of course the strut upper mount point was so adjusted as to come inside at the same time.
The countermeasure for this unbalanced alignment is to make the left frontal wheel outside position on the same as the frontal right side. Of course the strut upper mount must be moved out side at the same time to keep the original negative camber value. I think this intention better this time on Beetle than adjusting rear total toe vector direction.
This kind of discrepancy on lateral offset may take time to be corrected firmly, remembering the former automobile EP82 TOYOTA Starlet with rear axle fixed 3 linked trailing arm with lateral arm constructive design, finally finding out the critical problem, being soldered rear hub case construction with firm and solid fixation but irregular rear negative cambers.
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