Proper timing and EGT at cruise - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-13-2012, 10:36 AM   #21
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1300f EGT cylinder 4 at cruise
38 degrees of timing, around stoich 14.7~

1200f you say around 40-45?
hmm

how close is your egt to the port?
mine is about 1.5inches from the port
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Old 07-13-2012, 10:53 AM   #22
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I'd like to instal the EGT gauge I've had for 5-years, but Manual and I don't get along.
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Old 07-13-2012, 10:59 AM   #23
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forgot to mention 36-38mpg highway cruising
5 speed, 4.30 rear 1.6l
460 pisser rx7 460 injectors
38 degrees of timing and usually tad leaner then stoich if not at stoich.
I haven't tried for a lean then 15.4 test in a while.
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Old 07-13-2012, 11:26 AM   #24
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What is your cruise speed?
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Old 07-13-2012, 11:34 AM   #25
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I'm there as well (36-38mpg).

Cruising speed is 75mph. 6-speed, 3.636 gears.
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Old 07-13-2012, 11:41 AM   #26
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Quote:
Originally Posted by Reverant View Post
I'm there as well (36-38mpg).

Cruising speed is 75mph. 6-speed, 3.636 gears.
WTF am I doing wrong aside from gears?

BTW, this is 79mph with a GPS, the speedo says ~84mph; the tach says about 4100rpm.
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Old 07-13-2012, 12:12 PM   #27
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depends on area, 65mph to 75mph
around 80mph on the interstates
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Old 07-13-2012, 12:25 PM   #28
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Quote:
Originally Posted by Techsalvager View Post
depends on area, 65mph to 75mph
around 80mph on the interstates
Methinks my engine is hurt. I hope that's it, or I know nothing about tuning.
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Old 07-13-2012, 12:47 PM   #29
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why not create a new thread seperate of this asking peoples gas mileage and settings
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Old 07-14-2012, 12:35 AM   #30
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Quote:
Originally Posted by Techsalvager View Post
why not create a new thread seperate of this asking peoples gas mileage and settings
Why not create a new thread of ur wrecktum?
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Old 07-14-2012, 05:09 AM   #31
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Quote:
Originally Posted by hustler View Post
WTF am I doing wrong aside from gears?

BTW, this is 79mph with a GPS, the speedo says ~84mph; the tach says about 4100rpm.
With these 3.636 gears, 75mph is at 3200rpm. If PW is the same at both crusing RPMs, then you are spending 4100/3200 = 28% more fuel.

Of course the PWs won't be exactly the same (should be higher at 3200rpm) but fuel consumption would still be higher at 4100rpm.
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