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Author Topic: Valve height difference  (Read 3398 times)

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ToddK

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Valve height difference
« on: March 03, 2012, 01:11:28 AM »
I've just had a new set of 2.09" / 1.65" stainless valves installed  in my C1AE-A heads. I checked the valve installed heights and the intakes sit higher than the exhaust valves by 0.040". Is this a problem? I will be using adjustable roller tip rockers and will be buying new pushrods after I measure the required length. Will this be okay? The engine is not too wild, just a mild 390 running a Comp 270S cam.
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jayb

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Re: Valve height difference
« Reply #1 on: March 03, 2012, 01:25:21 AM »
That will be no problem.  Of course ideally you'd like them to be at the same height, but a difference of only .040" won't make any difference to the engine.
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Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

ToddK

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Re: Valve height difference
« Reply #2 on: March 03, 2012, 03:46:10 AM »
Great, thanks Jay. I didn't think it would be too much of a problem, but thought I'd check with the experts. I looked at the Comp website and saw the thinnest lash cap is 0.080", so I assumed I could live with 0.040".
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