Quote:
Originally Posted by roflwaffle
Road load for a VW at 50mph is about 10hp, so you may go from 52mpg to 53.3mpg, if you're lucky. I think the oil pump otoh will net a more noticeable increase. What about getting some data with the oil pump out and the balance shaft still in, and then pull the balance shaft to see if you see anything? It's no A-B-A, but it's better than nothing.
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That 10hp should be bit less with aeromods and tires inflated to higher pressures etc. I don't know how much it is possible to get off, but if it is possible to take 20% off, then there is again higher benefit when removing other losses.
Still rolling resistance and aero are perhaps those where most benefits can be sourced from. E-fan will help, but only tiny bit, still it is very good mod to do for vehicles which don't have E-fan already, it is around similar hp which was posted for balance shaft, every tiny bit counts of course, but is balance shaft needed because of reliability issues? I think that some engines have it because otherwise vibrations would cause some issues other than uncomfort.