>>> I've just bought a 306 hdi, which I thinking of having the ecu
>>> remapped by speed-busters. Anyone else had this done and can give
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> it since 1996. The guy's advert i saw on ebay and has 100% feedback
> on the service since 2003.
You pays your money, you makes your choice. I'd stick with the veterans if
it were me.
> I'm interested if anyone has had it done and if they could comment on:
> a) what difference it makes to 0-60 time / top speed
You can calculate these differences yourself using the before and after
power figures, but the numbers are meaningless. The point is, your car WILL
be quicker - if that's what you want, then get it done. Top speed won't
change much, as the tuning concentrates more on raising the mid-range torque
to improve the in-gear (ie, overtaking) times.
Diesel tweaking of this nature is tried and tested. If you want more power,
then go for it !
> b) any negative side effects - reliability (emmissions?), fuel
> economy etc
Not that you'll notice. Obviously the tweaked engine isn't gonna last as
long as the standard one, but that's not an issue unless you plan to keep
the car until the end of it's life (ie, ten more years or whatever !)