Thread: Light Flywheel Guys - Gas Mileage?

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2010-01-05 13:55:24

#11

gomba

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Granted my flywheel isn't really light, but I have a 13lb flywheel and haven't seen any drop in highway gas mileage. My city mileage has always been bad, even though I don't drive the car hard.

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2010-01-05 14:04:22

#12

Cliff

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Originally Posted by Vadim

Well they talk about things they know best you know

Lightly put it makes sense to why a heavy flywheel would help on the highway, because your trying to keep a steady motion. But when you dig in deeper, and actually study highway driving, you will see that even the cruise control constantly changes the throttle amount on slight inclines or declines. Thus since light flywheel is less resistant to change, it should help.

I tried that before, and it works great until you hit boost... at that point the A/F ratios still stay up in 16-17's for a second, before it dips down to 12's.

I honestly do want a B13RT ecu, but I think I'll hold off to the PNP solution that SeriousBusiness will offer.

Or wait until Dave Dunn finishes the code for the B14 ECU's, allowing them to be fully unlocked

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2010-01-05 15:04:33

#13

Vadim

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Originally Posted by TeKKiE

Or wait until Dave Dunn finishes the code for the B14 ECU's, allowing them to be fully unlocked

We'll see, I'm kinda like the idea of stand alone... We don't have emissions in this part of the world

Plus I don't think I can live to buy another MAF, freaking tired of MAF's

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2010-01-05 15:37:06

#14

Cliff

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Originally Posted by Vadim

We'll see, I'm kinda like the idea of stand alone... We don't have emissions in this part of the world

Plus I don't think I can live to buy another MAF, freaking tired of MAF's

The new code will include tuning with MAP and IAT. All on a standard ECU

If you're not worried about emissions, then you need to get a B13RTv2 ASAP!

MAP and IAT are currently being worked out.

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2010-01-05 16:14:56

#15

SneakyOwner Online/offline status of SneakyOwner is unknown

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what are your cruising A/f's? I get fantastic gas mileage when cruising in my cammed turbo car probably about 26mpg. At cruise my a/f sits at about 16.1 to 17.0 at partial throttle and as soon as I drop the hammer it sits at 12.1 all day.Tuning with a greddy e-manage. Maybe your problem is your tune, honestly before I had my car dyno tuned I got like 15mpg no matter how I drove.

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2010-01-05 16:18:01

#16

Cliff

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Wow, 16's at cruise?!

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2010-01-05 16:50:27

#17

MR-4Door-SR20DET Online/offline status of MR-4Door-SR20DET is unknown

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Originally Posted by TheRealNighthog

I doubt it would decrease MPG's.

But jeezus man, you're willing to drop a significant performance adding part for a very minimal MPG difference (if at all)

I really think you need to just sell the car and get a damn hybrid.

x 2. The lightweight flywheel is better than pulleys in my opinion. My SR20 powered B13's will not run without one. I would leave it on.

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2010-01-05 17:01:09

#18

BenFenner

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Originally Posted by TeKKiE

Wow, 16's at cruise?!

Best economy is found around 15.8:1 I think (don't feel like looking it up in my past threads). Lots of people go leaner thinking it will help... ... *shrug*

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2010-01-05 17:06:14

#19

Cliff

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I always remembered best cruising afr's being around 15.3 to 15.6?

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