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Old 02-09-2008, 09:46 PM   #1
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Default rev limter

I have a 90 miata with a 1.6 and i was wondering why the rev limiter is set at 7k rpm? Is it the motor can not rev higher than that without coming apart or something else?

And another thing, what about timing belts, is there a kevlar one, or what else is good?
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Old 02-09-2008, 09:50 PM   #2
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Gates makes a performance timing belt for the miata.
Supposedly valve float occurs around 7400-7600 rpm with stock valvetrain. You won't gain much by revving it higher than the stock limiter.
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Old 02-09-2008, 09:55 PM   #3
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what if i wanted to safely run up to 8 what would i have to do
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Old 02-09-2008, 10:04 PM   #4
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Quote:
Originally Posted by andygoesfast View Post
what if i wanted to safely run up to 8 what would i have to do
Stronger rods, lighter pistons
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Old 02-09-2008, 10:38 PM   #5
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better springs and i would look at some Oil pump gears.
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Old 02-10-2008, 04:43 AM   #6
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Quote:
Originally Posted by magnamx-5 View Post
better springs and i would look at some Oil pump gears.
Stronger, lighter springs, lighter retainers, keepers, cams... Spinning an engine to oblivion costs more than it'll honestly be worth. I don't believe the stock miata head can really flow enough to support spinning it much over 7500.. I Could be wrong, but I don't think it would.
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Old 02-10-2008, 10:36 AM   #7
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Y?

It does not make any more power stock up there...so y?
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Old 02-10-2008, 10:55 AM   #8
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maybe for autox, to save you a 2-3 shift if you can stay in 2nd for 200-300 more rpm?
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Old 02-10-2008, 11:11 AM   #9
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why would you waste all that money for 200-300rpm...why you could buy something else...
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