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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 01-25-2012, 01:57 PM   #1
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Rev limiter

Guys,

I'm getting my ECU tuned.

What do you think I should set the rev limit at?

I was thinking something like 6300. Stock valve springs.

What do you's think?
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Old 01-25-2012, 02:13 PM   #2
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your right foot is your rev limiter

but with your turbo and valvetrain you wont be making any more power up top so at 6300 will be fine
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Old 01-25-2012, 03:38 PM   #3
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We should go ahead and just set you up like this


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Old 01-25-2012, 03:47 PM   #4
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Yeah, that will clear the cob webs out.
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Old 01-25-2012, 03:49 PM   #5
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haha that's awesome John. is that your drag car?
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Old 01-26-2012, 08:27 AM   #6
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I set my Stage 3 to 6600 because I could. Stay away from 6800+ because the Viggen pressure plate can't handle it and can explode at these higher RPMs. (says Nick).
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Old 01-26-2012, 08:33 AM   #7
 
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Is there any other reason to move the rev limiter except for dyno purposes? I'd rather bounce off fuel cut than overrev.

If this is a daily driver, keep it safe...especially if you have T7.
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Old 01-26-2012, 09:43 AM   #8
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now the real question, can you build boost with that or is just a limiter?
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Old 01-26-2012, 12:25 PM   #9
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No, not too much boost happening up there on my T25, but it does scare most bystanders! When I had my balance chain pulled I upped the rev limit to experiment. I don't hit the rev limit often but it can be fun in first.
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Old 01-26-2012, 12:46 PM   #10
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It helps with big turbo and cams...

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Old 01-26-2012, 07:12 PM   #11
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Old 01-27-2012, 02:02 AM   #12
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Quote:
Originally Posted by mike saunders View Post
Is there any other reason to move the rev limiter except for dyno purposes? I'd rather bounce off fuel cut than overrev.

If this is a daily driver, keep it safe...especially if you have T7.
How much is an "over rev"
What can I rev till, time after time ?

It's a T5. And gets me to work and back every other day
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Old 01-27-2012, 06:29 AM   #13
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People have run 7k all day long for years with the strong t5 head. Stg 3+ and stg 4 usually run a 7k rev limit. You will probably not need more than 6500rpm and the only gear it will help is second gear

John
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Old 01-27-2012, 02:42 PM   #14
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Originally Posted by JZW View Post
People have run 7k all day long for years with the strong t5 head. Stg 3+ and stg 4 usually run a 7k rev limit. You will probably not need more than 6500rpm and the only gear it will help is second gear

John
I think I'll go with a 6500k limit.
I've just been looking over dyno slips(over in the proof thread). And very few rev past 6500k. It looks like its all over at 6300k, for most with my size turbo (T28.) I can understand needing to rev it more with a "big" turbo.

You say John " Stg3+and Stg4 usually run a 7k limit. Why?

And I dont get "Only gear it will help is second" Explain that plz.


I am a puppy.
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Old 01-27-2012, 07:56 PM   #15
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Quote:
Originally Posted by bogan View Post
You say John " Stg3+and Stg4 usually run a 7k limit. Why?

And I dont get "Only gear it will help is second" Explain that plz.


I am a puppy.
he's speaking on behalf of his stage 3 and 4 tunes (and some of the other tuners)

explanation for "only gear..."
reason being it helps put you right back into your power band for 3rd gear
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