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 …

Comments: 0

Latest topics
» New convert under way
Today at 1:30 pm by kevin924kevin

» Drive by Wire Throttle Pedal Install on 1987 NA 944????
Today at 1:27 pm by kevin924kevin

» Project Purge: LS1 + Conversion Parts FS
Sat Dec 16, 2017 9:16 am by bajabluejay

» Problem with Dual Remote Vacuum Boosters
Fri Dec 15, 2017 9:35 am by johntorg

» 1987 944 Turbo --> LS
Fri Dec 15, 2017 8:39 am by Hotrodz of Dallas

» Iron vs Aluminum LS? discuss...
Fri Dec 15, 2017 8:27 am by Hotrodz of Dallas

» For sale $150 Griffin for LS1 LS Radiator swap
Tue Dec 12, 2017 9:34 pm by matt889

» Rebuilt engine threw three rods
Sun Dec 10, 2017 7:45 pm by jpkinerk

» 1984 Gen IV 5.3 Swap
Sun Dec 03, 2017 10:54 am by superman22x

» Aluminum 5.3 swap
Sat Dec 02, 2017 7:59 pm by turbobob924

December 2017
MonTueWedThuFriSatSun
    123
45678910
11121314151617
18192021222324
25262728293031

Calendar Calendar

Log in

I forgot my password


The "how high should i rev?" thread

View previous topic View next topic Go down

The "how high should i rev?" thread

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

So, someone posted this:
[You must be registered and logged in to see this link.]

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
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

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?
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

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

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

It's doable @ 5700rpms.

[You must be registered and logged in to see this image.]
avatar
Dawgz83948

Posts : 601
Join date : 2009-06-08
Location : Ca.

Back to top Go down

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.
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

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.

[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this image.]
avatar
Dawgz83948

Posts : 601
Join date : 2009-06-08
Location : Ca.

Back to top Go down

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

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

Here's a good online calculator!
[You must be registered and logged in to see this link.]
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

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
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

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...

docwyte

Posts : 1372
Join date : 2010-07-18

Back to top Go down

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.
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

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.
avatar
Dawgz83948

Posts : 601
Join date : 2009-06-08
Location : Ca.

Back to top Go down

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.

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 96
Location : NOTRE DAME

Back to top Go down

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
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

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
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

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

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 96
Location : NOTRE DAME

Back to top Go down

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.
avatar
Dawgz83948

Posts : 601
Join date : 2009-06-08
Location : Ca.

Back to top Go down

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

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

LOL, just checkin Laughing
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

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

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum