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Old Nov 6, 2006 | 03:54 AM
  #1  
type B16's Avatar
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Default bent valves?

well for some reason my motor spun to 8840 last night even with a 8600 fuel cutoff. im not sure if its just my head but it sounds like my motor got louder. ive never heard what valve ticking actually sounds like but im thinking i might have bent some for overreving.

now my question is, if i do have bent valves, will i still idle normally at 800/810?
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Old Nov 6, 2006 | 04:39 AM
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BoBo Racing's Avatar
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Default Re: bent valves? (type B16)

yes it depends how badly they are bent. if there not bent bad ur car will still idle
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Old Nov 6, 2006 | 04:55 AM
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Default Re: bent valves? (type B16)

You would have had to have gone farther than "just" 8840 rpm, since the mugen ECU worked fine on a stock ITR motor (I/H/E) up to ~9100 rpm w/o valve bending problems. JMHO
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Old Nov 6, 2006 | 10:04 AM
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Default Re: bent valves? (zygspeed)

I agree, 8840 isnt going to hurt anything..
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Old Nov 6, 2006 | 10:16 AM
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Default Re: bent valves? (type B16)

8840 is fine
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Old Nov 6, 2006 | 10:22 AM
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Default Re: bent valves? (realis9)

If you find that your idle is lumpy, assuming it wasn't b4. Then chances are your valves are bent. Do a leak down test to see if compression holds. Also, if air is coming out of your exhaust during the test then for sure your ex valves are bent. When I bent mine,
my motor was idiling rough and shaking. Make sure that you change all of your ex valves and ispect your head throughly. Good luck!
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Old Nov 6, 2006 | 07:17 PM
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Default Re: bent valves? (type B16)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type B16 &raquo;</TD></TR><TR><TD CLASS="quote">well for some reason my motor spun to 8840 last night even with a 8600 fuel cutoff. im not sure if its just my head but it sounds like my motor got louder. ive never heard what valve ticking actually sounds like but im thinking i might have bent some for overreving.

now my question is, if i do have bent valves, will i still idle normally at 800/810?</TD></TR></TABLE>

Its all in your head. Your tach is off, you can take it up to 9100rpm(indicated) before the revlimter at 8600rpm.
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Old Nov 6, 2006 | 07:23 PM
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type B16's Avatar
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Default Re: bent valves? (ITR#132)

its not my tach. its digital and its on point.

i just dont know why it revved to 8840 even with a 8600 cutoff.

i guess its just in my head. she was fine this mornign
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Old Nov 8, 2006 | 09:19 AM
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Default Re: bent valves? (type B16)

you'r probably fine I bent valves before, I had to keep the AC on in the winter to keep the revs up at idle to stop her from stalling. The leak down test will reveal it. You are likely fine though.
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