Nissan/Infiniti Tech SR20DET? RB26DETT? VQ35DE? What's it all mean? Find out here!

Datsun Dreaming

Old Jan 2, 2010 | 07:51 PM
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Originally Posted by osama tim laden
cool story einstein.
rofl
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Old Jan 2, 2010 | 09:24 PM
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Originally Posted by LongFellow
You're saturn explination works wonders when people are running stock tire sizes, but in most cases no one is. Going to a 4.36 can net you improved gas milage.

Comparing the amount of gas used between my car (4.08 & 255-0-17) and epsteins car (4.36 & 245-40-17) in july on our 2000+ mile deals gap trip we always put the same amount of gas in out cars. I checked how much gas all our cars where using at the time and we used up about the same amount every time.
This can't be a serious post.

The saturn explanation is independent of tire size. You're not understanding BSFC.

Comparing one car to another does not make sense. More than likely, the two cars do not have identical tuning/modifications/driving.
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Old Jan 2, 2010 | 09:28 PM
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Originally Posted by The Finn
Awesome post. I've always wanted to graph the relationship between speed and MPG so I know how fast I can go on the highway before the MPG takes a huge dive due to wind resistance and stuff.

My pre-calc professor once put up such a graph of a Ford taurus's MPG to show how it's a parabola (-X^2) with MPG as the depended variable (Y-axis) and speed the independent (X-axis), and everyone was literally falling asleep...

Suppose I'm in the minority here cause I love this stuff, and I regret not going on to Calc I.
Yeah, the relationship looks like that because at low speeds you can't get up into the good BSFC curve, and at high speeds, you're burning energy on aero drag, which increases with the square of velocity.
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Old Jan 3, 2010 | 08:35 AM
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Originally Posted by 170k240
Dan. i want to buy your coilovers. nao!
I might not end up selling them. Depending on what happens when I switch to speherical uprights I might just keep them a while longer. Either way it seems that I'm going to run them untill this summer. If I do sell them you'll be the first to know.
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Old Jan 3, 2010 | 08:40 AM
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Originally Posted by greenman100
This can't be a serious post.

The saturn explanation is independent of tire size. You're not understanding BSFC.

Comparing one car to another does not make sense. More than likely, the two cars do not have identical tuning/modifications/driving.
More than likely its a real world situation that actually happend. My car and chris's car where pretty much the same mechanically. I had an exhuast 3" exhaust with the silencer in it so it that negated any real performance gain.

Sweet picture though.
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Old Jan 3, 2010 | 09:55 AM
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Picked up my new toy
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Old Jan 3, 2010 | 10:41 AM
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Originally Posted by LongFellow
I might not end up selling them. Depending on what happens when I switch to speherical uprights I might just keep them a while longer. Either way it seems that I'm going to run them untill this summer. If I do sell them you'll be the first to know.
damn. i have cash in hand...
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Old Jan 3, 2010 | 11:29 AM
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Nice Mike. Ill have to come by and check it out.
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Old Jan 3, 2010 | 01:22 PM
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nice mike anything wrong with it?
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Old Jan 3, 2010 | 01:28 PM
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Originally Posted by asia989
nice mike anything wrong with it?
It was rod knocked, the kid got the engine and just put it right in. But Im going to do a full rebuild on it, I got it for cheap. I should have all the parts in a week, and motor done in a monthish.
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