Considering a pulley install - those who have done it, have you had any significant decrease in mileage?

Thanks in advance!

 

I found that my mileage increased

 

Doesn't seem to be much of a significant difference. My in-town driving has seemed to go up a little bit, while highway might be a little lower, but only by 1-2MPG. Mostly just depends on how you drive it. I find that the pulley mostly adds power to the high-end (in my '03), so as long as you don't mash the throttle all the time, it drives quite nicely, like it did before.

 

I average around 31 mpg or so when I am not doing twisties or in big traffic. Tracking the car knocked the mileage down to around 17 mpg, still not bad...and even with the pulley screaming alongside that Milltek and ALTA stuff.

 

I've gained ~1.5 MPG since the addition of my 15%.

 

The hardest part for me is keeping my foot out of the throttle The extra little juice is just fun to use. No it wont significantly do anything to gas milage. Do it, enjoy it and motor on -- Johan

 

My 15% was installed last Saturday. I filled the tank today & saw a 1 mpg drop in mileage. Worth it to me for the extra power & grins I get from the 15% pulley. For as hard as I've been driving my car while testing out the pulley I'm amazed at the mileage.

Edit.....I forgot to mention I have a JCW airbox too.

 

I got the 15% pulley and an alta air intake box put in last month and mine has increased. Now if I could just learn to keep my foot out of it....it'd probably be even better. hehehe.

 

mine increased. it's like the car runs so rich that additional air just makes it more effitiant . that's some bad spelling right there lol
just go colder on the plugs dude.

 

Mine has not changed. I average 32-34 on the freeway and 28-30 running around town.

Mike

 

I have always gotten terrible mileage. Car has 180k.

when stock: around 17-20mpg depending on how you drive, mostly around town miles

with lots of maintaining, new crank pulley, new idlers, just generally running better: 21-24 depending on how I drive

with 15% pulley, colder plugs: around 25, less if driving hard. Again, little highway, just around town

 

FYI: What you can't do is to trust your Mini's MPG readout after changing injectors, because that number is calculated from the injector's "ON" dwell time against miles driven. That doesn't take into account is that bigger injectors flow more fuel in the same amount of ON-time.

Example:
When I went from stock to 380cc injectors (along with a pulley & tune years ago), the reported freeway cruise MPG went up about 10%, yet when I carefully measured fuel used-used against miles driven, it turned out that actual MPG either stayed the same or went down a couple percent.
Of course, it was a lot more fun to drive

 

Hot rods (regardless of make/model) don't get good gas mileage -- never have, never will. That's not really the point of mods, is it?

 

It all depends on how much you put your foot in it ... when ‘new’ and novel ... you’ll no doubt get worse mileage ... ... but as that wears off ... IF it wears off ... you mileage should come back to the same

my 2¢ FWIW




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Basically all true.

Mike