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Old 03-09-2011, 12:24 AM   #1
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Default 363 gears MPG?

I want better gas mileage. Some on here have had 363 gears. But the motors seem to have been built to the hilt.
Does anyone have 363 gears in a car with a stock motor, or stock motor turboed?

And what gas mileage do you get?
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Old 03-09-2011, 12:46 AM   #2
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I know a guy that has a couple of Miatas. He was driving 50 miles each way to work. For his DD Miata he put a 3.63 rear end in a 1.6 Miata with a 6 speed and a hard top and was getting close to 40 mpg on the interstate. IIRC, it was about 38. It was a pooch but the 6 speed helped get it going a bit.

Before anyone says that he wasted the gears and 6 speed, the DD is just a place holder and better than the parts sitting in the garage. Basically mobile storage for his autox car spare parts.
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Old 03-09-2011, 12:55 AM   #3
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Great idea. Spend $400 for a new ring and pinion and $200 in labor to save a few pennies a gallon. It'll pay for titself in 40,000 miles!
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Old 03-09-2011, 12:59 AM   #4
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YOU ARE THE MAN AGAIN!!!!!
I have boost to make up for the lugging.

I have seriously been thinking of going TDI. Just to get the 55 mpg some people are getting with a upgraded turbo and custom tune.

But if I can ge 40 with a miata.....Why switch from perfection....
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Old 03-09-2011, 01:02 AM   #5
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I drive more than 2 miles a day, so Ill get my 600 back quick. I take my car on 9 hr trips. An extra 10mpg is A LOT!
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Old 03-09-2011, 01:06 AM   #6
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How far are the gears shifts apart for the 5 speed?

Is there anyway I might ccould email that guy?
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Old 03-09-2011, 01:11 AM   #7
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Quote:
Originally Posted by Faeflora View Post
Great idea. Spend $400 for a new ring and pinion and $200 in labor to save a few pennies a gallon. It'll pay for titself in 40,000 miles!
Dude, your woman would be mad if I didn't have enough gas to come see her.

For real though. I'm driving to Austin a lot. And my car has a fresh Jdm, and mild race prepped. I hate to sell it for a TDI. That would be enough to float me if oil prices soared.

And it is paid for......
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Old 03-09-2011, 01:12 AM   #8
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10mpg extra yah right. BTW I have a 363 with 6 speed. Sorry I can't give you data though because that combo came along with 300+ horsepower and miscellaneous long idles where I have to futz with stuff.

As for the TDI do a ROI analysis. MPG takes a while to make a real impact on your wallet.
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Old 03-09-2011, 01:14 AM   #9
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Quote:
Originally Posted by Toddcod View Post
Dude, your woman would be mad if I didn't have enough gas to come see her.

For real though. I'm driving to Austin a lot. And my car has a fresh Jdm, and mild race prepped. I hate to sell it for a TDI. That would be enough to float me if oil prices soared.

And it is paid for......
Come on man tune your AFRs for lean cruise. And I suppose advance your cruise timing a lot too.
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Old 03-09-2011, 01:42 AM   #10
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Why get rid of the miata for a TDI? I have of JSW TDI and an MX5. Double Happiness.
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Old 03-09-2011, 01:44 AM   #11
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Quote:
Originally Posted by Toddcod View Post
I drive more than 2 miles a day, so Ill get my 600 back quick. I take my car on 9 hr trips. An extra 10mpg is A LOT!
Fine you win. I will sell you my cryotreated and polished 3.6 rear with torsen for $800.
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Old 03-09-2011, 02:00 AM   #12
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my dad hyper miled our 96 to 50 mpg confirmed on several fill ups but that takes abit more of a concius effort than just getting in and driving your car.
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Old 03-09-2011, 07:28 AM   #13
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Quote:
Originally Posted by Faeflora View Post
Great idea. Spend $400 for a new ring and pinion and $200 in labor to save a few pennies a gallon. It'll pay for titself in 40,000 miles!
You paid for a cryo treated rear end which will never pay for itself.

I mean of all the people to question someone's bang for the buck purchase!
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Old 03-09-2011, 07:53 AM   #14
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Quote:
Originally Posted by flying_solo View Post
Why get rid of the miata for a TDI? I have of JSW TDI and an MX5. Double Happiness.
This.
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Old 03-09-2011, 08:29 AM   #15
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Quote:
Originally Posted by Faeflora View Post
Fine you win. I will sell you my cryotreated and polished 3.6 rear with torsen for $800.
Sold to me!
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Old 03-09-2011, 08:49 AM   #16
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I'm getting 27mpg in the track car with the 400lb trailer driving 80-90mph to and from the track. I almost made this thread yesterday considering I have a 6/3.63 in the garage as "spares" for the turbo car.

You can compare the ratios with the FM calculator, but I'll tell you that 1-5 will be tighter than a 5/4.30, then 6th gear on top is big.
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Old 03-09-2011, 09:59 AM   #17
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Quote:
Originally Posted by hustler View Post
I'm getting 27mpg in the track car with the 400lb trailer driving 80-90mph to and from the track. I almost made this thread yesterday considering I have a 6/3.63 in the garage as "spares" for the turbo car.

You can compare the ratios with the FM calculator, but I'll tell you that 1-5 will be tighter than a 5/4.30, then 6th gear on top is big.
You don't need a spare, sell a set.
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Old 03-09-2011, 10:24 AM   #18
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Quote:
Originally Posted by fmowry View Post
You paid for a cryo treated rear end which will never pay for itself.

I mean of all the people to question someone's bang for the buck purchase!

The rear was ACTUALLY supposed to have my clutch diff put into it but someone fucked it up and put the torsen in there. The whole point of the damn cryo treat was to launch it without splosions. I am thinking about starting the diff build over :( The torsen does work but again, I hesitate to launch it.


Quote:
Originally Posted by djp0623 View Post
Sold to me!
OK pm me
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Old 03-09-2011, 11:06 AM   #19
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PM sent
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Old 03-09-2011, 04:42 PM   #20
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Anybody here with 3.6 and 5-speed?
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