Quote:
Originally Posted by gsxr
That is awesome. I think 7.5mm would be plenty for my needs (looking for ~300hp), anything larger might be a bit overkill.
Even with my simple 6mm pump upgrade, I'm finding some unexpected issues. Because the throttle linkage travel is so small at cruising speeds and at light acceleration (i.e., in traffic) this causes issues with cruise control surging, and the transmission upshifting too early. Thus far I haven't been able to fix either problem via adjustments. Maybe Dieselmeken has a way to tweak the power curve vs throttle input to help counteract those issues.
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my 603a behaves like stock, except way more power and less smoke.
I would not accept any compromise for a daily driver. For further testing I even still run the stock turbo (without excessive EGT). The pump adjustment is at about 25-30% of max. fuel delivery.
So the diameter of elements is more a matter of efficiency than power goal.
Check the (maybe adjustable) linkage levers. If this is o.k. then have the governor adjusted by someone who knows what to do.
The following check will tell you all: open the IP side cover and slowly press the pedal (or linkage), engine NOT running, now you want to see the rack move +- with the pedal. I had a pump with bad adjusted governor and the rack did not move until approx. 50% of pedal but then "jumped" to that position. The rack was not stuck, it was simply bad governor adjustment.
Tom