Why the .055" spread in deck heights? Crank indexed poorly?

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Joshua

Check your math! .0055"

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11.02 @ 120.56
http://www.youtube.com/watch?v=EAxRmoDgsdY
Chassis dyno
http://www.youtube.com/watch?v=wd6hFGzLJMc

Sorry, dropped a zero, typo not a math problem. Still over 5 thousandths isn't cool. It's probably the crank.

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Joshua

Or a non parallel top deck to crank main line... if you see a consistent increase / decrease, end to end.

Could be rods too.

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11.02 @ 120.56
http://www.youtube.com/watch?v=EAxRmoDgsdY
Chassis dyno
http://www.youtube.com/watch?v=wd6hFGzLJMc

Mine are .010 down.My block was decked a little more,I also took .020 off the pistons to get them there.I also sanded a couple to get them closer.I am actually .009 to .011 down.
I dremeled my pistons today for the valve clearence,will do final kiss tommorrow and check again with least bent valve.One allmost survived.Exhaust are a little to close for my likeing also.Guzzi Mark

Should have been easy to know where to grind

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11.02 @ 120.56
http://www.youtube.com/watch?v=EAxRmoDgsdY
Chassis dyno
http://www.youtube.com/watch?v=wd6hFGzLJMc

Far from easy or fun,worst part of build so far,my back is killing me.Haveing motor back 1.5 inches didnt help on number 6.Guzzi Mark

Well No they are not consistent from front to rear.

They seem to be random.

I dont have the #'s for each one with me now - They are on a notecard at home.

I will have to post them.

Greg

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http://www.youtube.com/hyperpack

If K1 did that to their customers I'd be unhappy and surprised. The deck heights of the 170 I tore down were also way off. I'm having the crank stroke and rod lengths checked. The pistons are within 1/2 a thousandth of one another.

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Joshua

If you recall, K1 did have a problem with the tang being machined on the wrong side of the rod and cap. Never say never. They admitted the mistake and fixed it...no big deal. Probably not the pistons either. I don't have them in my engine yet to check the height but the diameter of all 6 measured within .0003". Four are within .0002" of each other.

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11.02 @ 120.56
http://www.youtube.com/watch?v=EAxRmoDgsdY
Chassis dyno
http://www.youtube.com/watch?v=wd6hFGzLJMc

thanks greg for pics. my guess from pics 4 , 5 , and 6 at about the 2 o'clock area looked like -.080 to -.100. i was way off . ronnie

When it comes time to cut valve reliefs in my pistons I'm going to use a transfer punch through the valve guides to mark the valve centers. Since the reliefs will be cut in stock replacement type forgings they will be as shallow as is practical.

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Joshua

Dang Mark, thats a drag. I still have to come by and say hi, Im working tomorrow after 11 days off. Will pop in and introduce myself if Im on the good side of town (rarely!)

I know these are very old posts but was wondering if Wiseco ever changed the valve notches on the new pistons? We will have 2 motors going together shortly and was just wondering.

Rick

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6