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Private Classifieds / Re: WTB C7AE-A Heads
« on: January 04, 2016, 07:22:29 AM »
Hi all, still looking if anyone can help. Cheers.
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Or a MR 2x4 intake...Surely there has to be one out there....Hi, I have 2 brand new ones here in Brisbane, Australia. One of them is a factory original and I probably wouldn't let it go but the other one I don't have a need for. Cheers
How are you checking?Thanks for pointing that out Brent, a big opps. I machined an ally bridge that I bolted down to the block for rigidity and consistency. The worst of them is 0.028" to -0.004", a total of 0.032". That seems a bit excesive? I am going to put each piston on the CMM at work next week and see what I get. Cheers.
On a piston like that where you can't put your bridge directly over the wrist pin, you need to rotate until the piston is as high in its travel as it can be, then put your bridge on one side of the piston. Push down all the way, record the measurement, then push down all the way on the opposite end of the piston so it will rock up in the other direction, then record your measurement. Average the two and you can see how far down it is.
I wouldn't expect the numbers to be so different on adjacent holes, even on factory blocks that have not been square decked, it will be similar, but you'll see extreme measurements on opposite ends of the decks.
Thanks Jay. I will see if I can fashion something in order to get the spring off. I see they make a universal spring removal tool that they sell at Autozone. Its like $20, and I don't see why it wouldn't work.
So just so I understand, I will still use clay? (I saw you used a check spring and clay in the 519" build). The only difference is that the check spring gives you the "worse case scenario" as far as valve depth? And If I used a normal spring, the valve would not travel as "deep" just turning the crank by hand thus not giving you an accurate measurement? Even when you use a check spring, the heads still need to come off to remove the clay for measurement right?
I believe out of the who build process, timing the cams has had me the most nervous (So much so that I purchased an extra set of the ferrea lightweight valves just incase) lol Hopefully I don't need them!