hi all.
i drive a B310 with A15
(just change the engine, where exhaust is still same)

the thing is the engine is very hard to climb up the RPM after 3000rpm. (even is in first gear)

and the top i tried is about 140kph only (maybe in real life is about 130++kph)


is the engine behave like this way? (slow rpm climb after 3k rpm)
or is it other restriction like the exhaust, wrong fuel mixture/ jetting on the carb?)

actually last time when i using A12 also the rpm climbs slow after 3k rpm.. but i think is aging problem. but this A15 is in year 90's (according to previous record of that C20 van)

my car is all original, with stock hitachi carb,
the air filter is apexi dual funnel ( when the engine comes there is no air filter, so i bought one), and electronic distributor.

so any other A15 driver there?

can share with me what limit the hp..?


all feedback appreciated.. thanks