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HELP with Rocker Arm Geometry!
2.02 1.60 valve aluminum heads for a 302 Windsor based motor. Can some one do me a favor and if you have a set of aluminum heads around, can you measure from the center of the rocker arm stud to the center of the valve tip and give me your measurement? This is the second set of heads I've ordered from this company and I'm almost positive the holes for the rocker arm studs are being tapped in the wrong place causing to rocker arm to be too close to the valve spring, which in turn throws the rocker arm geometry completely off. Any help with be greatly appreciated!
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What heads? -
Flotek 180ccComment
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Pushrod length will affect your geometry a lot. Are you using the correct length?
What makes you think the studs are placed incorrectly?1971 Ford Torino - Time to go bigger and better.
2011 F150 Limited - Stock with a 6.2Comment
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My other set of heads I ordered from them looked like the holes for the rocker arm studs were placed too close to the valve spring. A have a brand new set of scorpion 1.7 rockers I mocked up and with my adjustable pushrod tool the other way I could get the roller tip of the rocker to be in the middle of the valve it caused the rocker arm to point up really far. It also made me almost completely shorten the pushrod checking tool (less than the stock length) which in turn causes the geometry to be completely screwed up. It will put a ton of strain on the rocker arms and valve guides causing them to wear out extremely fast. Anyone have a measurement of a head they have laying around?Originally posted by Torinoman View PostComment
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The only way**Comment
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Could you post up a pic?Comment
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If I had seen this last week I could have measured on my TFS heads but I just buttoned the car up over the weekend and don't feel like pulling crap apart to open the valve cover.Originally posted by stevoComment
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I understand man! I was just seeing if anyone on here had some heads laying around they could measure really quick.Originally posted by bird_dog0347 View Post
New set of heads show where the rocker arm stud holes are tapped
Old set showing where the rocker arm stud holes are tapped
Tip of the rocker with huge over lap on the valve tip with what looks like somewhat close rocker arm geometry
This is when I adjusted the adjustable pushrod down far enough to get the roller tip of the rocker to be centered on the valve tip when I rotate the engine. The lock nut of the rocker is basically touching the blue part of the rocker...
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Video of it in motion...
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I have never heard of Flowtek heads but suspect that they are Chinese castings there finish machined here in the U.S. It is the new black.
Anyway, my first takeaway from your pic is the height of the valve stem. That stem looks very high and it makes me wonder what valves are in your heads.Originally posted by racrguyOriginally posted by racrguyComment
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The valve tip is supposed to be fairly flush with the height of the top of the spring retainer, correct?Originally posted by Broncojohnny View Post
I didn't even think about that... They do look really long. The company has been around for a long time and they have some pretty good reviews. I buddy of mine bought a set of heads from them about 6-7 years ago and they've been perfect ever since. But, I'm not sure sure who doing the ordering and measurements now but they're obviously sloppy about it. If I would've known this was going to happen I would've just bought a good set of used AFR's or something similar instead of dealing with them.Comment
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Just noticed on my new heads the valve tip isn't nearly as long as the old ones...maybe the old heads had the wrong valves?
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That makes sense to me. In the photo, looks like the valve stem and rocker stud aren't parallel. If the valve is longer, then its tip will be closer to the stud.Comment
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I don't think the valve stem and rocker stud are perfectly parallel anyways. But the fact that the valve stem tip was so long on the old heads it made the rocker point upwardsOriginally posted by line-em-up View PostComment
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