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Go Back   SR20 Forum > Main Forums > SR20VE / SR16VE
Reload this Page best RPM to activate stock 20VE cam's?



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Old 06-30-2005, 10:42 PM   #1 (permalink)
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best RPM to activate stock 20VE cam's?
I was just wonderingout of all of you guys still runing stock 20VE cams whats the best RPM youve found to activate them?
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Old 06-30-2005, 11:44 PM   #2 (permalink)
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Old 06-30-2005, 11:46 PM   #3 (permalink)
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5k is fine
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Old 07-01-2005, 12:26 AM   #4 (permalink)
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4500-5000 RPM...anywhere in that range is common.
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Old 07-01-2005, 12:27 AM   #5 (permalink)
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thanx guys for not bombing me with "search" comments.
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Old 07-01-2005, 07:31 AM   #6 (permalink)
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The dyno showed a flat spot for me at 4600-5000 RPM with cams switching at 5000 RPM. Moving the switch point to 4600 RPM removed the flat spot. Switch point has no effect on output at higher RPM or max output.

The shift point varies from set up to set up -- best to check on the dyno if you want to be sure.

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Old 07-01-2005, 08:26 AM   #7 (permalink)
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Amen Bill.... This is what I call sound advice...
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Old 07-02-2005, 08:56 AM   #8 (permalink)
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I agree Bill. My VE seems more responsive at 4500 RPM than it does at 4700 and 4800.
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Old 07-02-2005, 12:50 PM   #9 (permalink)
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It seems that the freer-flowing the exhaust, the lower the rpm to switch to the big lobes.
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Old 07-02-2005, 01:53 PM   #10 (permalink)
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I have a 2.5 vrs exhaust with stock manifold and a hotshot secondary. do you think this exhaust is free flowing enoungh to have my cams at 4600 instead of 5k.
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Old 07-02-2005, 03:59 PM   #11 (permalink)
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Here is a dyno sheet that shows a run with only the low cams compared to a run with switching to high cams at 4600 RPM. You can see the flat spot that I mentioned in an earlier post.
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Old 07-02-2005, 06:31 PM   #12 (permalink)
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Originally Posted by jacen99SE
It seems that the freer-flowing the exhaust, the lower the rpm to switch to the big lobes.

Jacen I believe your theory is correct. When I got my 3 inch exhaust, I did feel a bigger push after lowering the activation point from 4800 to 4550.
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