r2/l2 function

[BadBatsuMaru]

Originally posted by Famine
It's not the mileage per se (although 200 and WHAT?! ), but on a 3-cylinder engine, that's staggering. My current car has a 4-pot with just shy of 60,000 on it and I'm getting rid of it before the engine explodes...

My brother has an '86 Prelude with 316,000 miles, and it runs perfectly. Only ever replaced a CV joint and a fuel injector.

The real question, though, is why do you keep getting Festivas if they die before 100,000 miles?

 

[BadBatsuMaru]

Originally posted by XenotekTT
It is very clear that no one here knows much about racing. The optimal shift point (when going for all out speed) is whatever RPM will put you immediatly into your peak torque in the next gear.

If that means shifting at 7 with the redline at 9, it's still faster. Although in GT3 there's really no way to tell peak torque that I know of.

The funniest part is that you're being condescending even though you're wrong

If you want to get technical (which obviously you do), you do not shift at whatever RPM will put you into the peak torque in the next gear. You shift at the point where the wheel torque in the current gear equals the wheel torque in the next gear. If you wait for the point that you're entering the next gear at peak torque, you're shifting way too late.

For example, if you overlay the torque curves (note that torque curve exactly matches the accleeration curve which exactly matches the G-Force curve), you can see the perfect RPM to shift to maintain peak acceleration:

 

[BadBatsuMaru]

Actually, with a really close ratio (like the heavily modified Lancia Delta in the example), shifting into peak torque would mean you were shifting too early in the later gears.

My point is that the optimal shift point is at the intersection of the torque curves -- it has nothing to do with "whatever RPM will put you immediatly into your peak torque in the next gear".

 

[Tazio]

You guys love to get technical and show off knowledge here huh? I have no interest in looking at torque curves & graphs or pie charts or whatever.

I simply test the car at the test track. Shift at 7000rpm, look at the time. Try it again at 7500rpm, 8000rpm, 7750, etc. Whatever gives me the fastest time, that's where I'm shifting!

 

[Famine]

Originally posted by BadBatsuMaru
The real question, though, is why do you keep getting Festivas if they die before 100,000 miles?

What's a Festiva? I drive a Fiesta - it's a small hatch, probably referred to as an "econobox".

Generally speaking, I don't trust the reliability of that age Fords with 4 cylinder engines once they pass 60,000 miles. However the Mk3 Fiesta has one of the best handling chassis ever made for that size car - Ford based the Ka and the Puma on it. But I wouldn't keep ANY car past 100,000 miles. I like my warranties Besides, I don't drive much distance - less than 7,000 a year easily.

In total I've spent £3500 on buying cars (in 8 years), and I've had pretty good motoring. The next car will cost me about £3500, but I can shift mine for about £1000.

 

[BadBatsuMaru]

Originally posted by Famine
What's a Festiva? I drive a Fiesta - it's a small hatch, probably referred to as an "econobox".

Fiesta? Festiva? Hmm...

The Ford Festiva is a car built by Kia with a 1.3L Mazda I-4 engine with 63hp. In 94-97 there was a styling change and they changed the name to the Ford Aspire.

So, I guess I was just a little confused. I'm not too familiar with the Ford Fiesta. It was only sold from 1977-80 in the US, and it had a 1.6L engine. It was very light and people liked to race them. It was kind of the CRX of the late 70's.

 

[Atlas]

Wouldn't it make sense to shift as high as possible since the speed of the wheels = speed of the crank times the number of revolutions? or something like that...

 

[gtmaniak]

mate......if it goes fast it is fast

 

[2I<E2S SUC1<]

If you use it, however far you go past the redline, it will shift when you let go and that much higher than what it normally does. For example if you go 500 rpms past redline than it will start at 5500 in the next gear if it starts at 5000 normally.

 

[gtmaniak]

correct me if im wrong but that would make it go faster because its already at higher rpms

 

[Vasco]

Yeah...it wouldn't make a difference at all...it just depends on the car's highest power output point...

 

[azndrifter318]

neone ever make music with mt? like 4,5,6,4,5,6,5,6 yeah i'm wierd

 

[gtmaniak]

u got that right