 What is RPM Redline?, for a 2.5L six? |
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| jfort |
 Jun 2 2008, 07:44 AM
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#1
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Senior Member  Group: Members Posts: 1,135 Joined: 5-May 03 From: Findlay, OH Member No.: 652 Region Association: Upper MidWest 
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the engine is an early 2.0L case with 2.7L pistons/cylinders for 2.5L displacement. E cam. getting a shift light so that I don't over rev engine but I have no idea how to program it. what is an appropriate red line for this engine?
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Replies(1 - 5)
| brant |
Jun 2 2008, 09:49 AM
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#2
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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it depends a lot on how the heads are built
If they are stock heads, with stock-spec springs, and stock weighted everything...... then I'd go with stock redline for those heads. |
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| ericread |
Jun 2 2008, 10:18 AM
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#3
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The Viper Blue 914 Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California |
The engine RPM redline is just under the rpm when your engine implodes. My recommendation is to rev the engine until it seizes. The redline is about 300 RPM below that point. (IMG:style_emoticons/default/biggrin.gif)
"If you don't ask, how are you ever going to learn" Seriously, the redline is based upon the engine geometry, heads, valves valve springs, etc, etc, etc. Not easily ascertained form the information you have provided thus far. (IMG:style_emoticons/default/idea.gif) |
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| sixnotfour |
Jun 2 2008, 11:38 AM
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#4
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914 Wizard Group: Members Posts: 10,432 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains
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QUOTE it depends a lot on how the heads are built If they are stock heads, with stock-spec springs, and stock weighted everything...... then I'd go with stock redline for those heads. add QUOTE E cam 7k |
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| jmill |
Jun 2 2008, 11:49 AM
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#5
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
The valve train is usually the RPM limiting factor. To increase redline above stock you would need to go with heavier springs and/or lighter valves and keepers. Valve float is what gets you into trouble with piston to valve clearances.
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| Downunderman |
Jun 2 2008, 03:07 PM
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#6
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Senior Member Group: Members Posts: 852 Joined: 31-May 03 From: Sydney, Australia Member No.: 766 Region Association: Australia and New Zealand |
With E cams, shift light 6,800, limiter 7,100.
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