HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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The "how high should i rev?" thread

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The "how high should i rev?" thread

Post  Porch on Wed Sep 15, 2010 10:58 am

So, someone posted this:
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Reading through there, we have:
ALL LS1 cars, no matter the yr, have a 6200 fuel cutoff from the factory.
a ~6700 rev limiter (Z06's)

A rev limiter is not something that's intended to be reached. It is there to prevent damage. If you're shifting on the rev limiter, you're losing.

If you have a 6700rpm rev limiter, and your car makes peak horsepower in the 6400rpm range, then you should be shifting at your peak power. A stock LS1 hits peak power in the 58-5900 range, an LS6 in the 6400 range.

Personally i read a lot of stuff on the internet, but i wouldn't consider it a fact (i mean, you should see the stuff they post at HondaTech.com!!!). I built a 7500rpm SBF a long time ago, and i know what goes into it!

Not saying you can't spin these motors that high, just saying that I wouldn't try to build a motor to rev that high for something i daily drive, and I wouldn't expect it to live long at those rpms. Now if you have an LS7 with titanium rods, THEN we'll talk Smile
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Re: The "how high should i rev?" thread

Post  xschop on Wed Sep 15, 2010 2:17 pm

So what were my RPMs the other day when I maxed out the NA 5th and the speedo hit 148mph on 285-30-18's?
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Re: The "how high should i rev?" thread

Post  Dawgz83948 on Wed Sep 15, 2010 2:26 pm

It's doable @ 5700rpms.

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Re: The "how high should i rev?" thread

Post  xschop on Wed Sep 15, 2010 2:33 pm

I thought that was conservative too as my speedo has become intermittent the last couple weeks (been yellin' gimme a break byatch) and taller tires throws the calcs off.
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Re: The "how high should i rev?" thread

Post  Dawgz83948 on Wed Sep 15, 2010 2:40 pm

actually your tires are too small in diameter. 225 50 16's are 25". Yours are under 25" in diameter.

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Re: The "how high should i rev?" thread

Post  Porch on Wed Sep 15, 2010 3:08 pm

Here's a good online calculator!
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Re: The "how high should i rev?" thread

Post  xschop on Wed Sep 15, 2010 3:22 pm

So what RPM will the Turbo Trans with NA 5th be on my tires at 70mph where I am suppose to commute as a law abiding citizen? Razz
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Re: The "how high should i rev?" thread

Post  docwyte on Wed Sep 15, 2010 4:49 pm

Dude, I'm going to rev mine to 11!

hehe. I'll probably stick to 6500 rpm with my motor. Cam is supposed to give a power band to 6400...

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Re: The "how high should i rev?" thread

Post  Porch on Wed Sep 15, 2010 5:11 pm

Go measure your tires, xschop! Measure from the center of the wheel to the ground, then multiply by 2.
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Re: The "how high should i rev?" thread

Post  Dawgz83948 on Wed Sep 15, 2010 5:14 pm

Or he could measure the whole wheel and multiply by 1.
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Re: The "how high should i rev?" thread

Post  944-LT1 on Wed Sep 15, 2010 5:19 pm

Nope. Measure the whole wheel and divide by 1.

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Re: The "how high should i rev?" thread

Post  xschop on Wed Sep 15, 2010 5:19 pm

The largest caliper I have is 24" lol

Didn't Dawg just post that my tires are 24.84"?
I'm curious what the RPM drop will be at 70mph turbo trans with the NA 5th swap. Would be nice to see a solid 32mpg's out of this 5.3
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Re: The "how high should i rev?" thread

Post  Porch on Wed Sep 15, 2010 10:14 pm

Re: Measuring the tires... You're supposed to measure from the center to the ground because tires compress under the weight of the car.

For example, a wheel may be 24" diameter without a load on it (12" radius). With the car's weight on it, maybe it drops down to 11.5" radius--which is like having a 23" diameter wheel. Makes a difference Wink
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Re: The "how high should i rev?" thread

Post  944-LT1 on Thu Sep 16, 2010 12:02 am

I was just havin' fun with ya. Laughing

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Re: The "how high should i rev?" thread

Post  Dawgz83948 on Thu Sep 16, 2010 9:08 am

Me too, but I already posted the tire diameter anyway so it's a moot point.
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Re: The "how high should i rev?" thread

Post  Porch on Thu Sep 16, 2010 11:52 am

LOL, just checkin Laughing
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