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Old 01-09-2006, 06:15 PM   #1
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Default GSR Build - Piston to valve clearance?

I did some research, and I know that to ultimately find the correct clearances I'm going to have to clay the motor. But before I do that, I was just wondering if +/-2 degrees on the cam gears is enough to play with?

The setup is as follows:

B18C1
Head milled .030
Blox Type B's - Valve lash .008-in. .009-ex.
PR3 pistons
Stock headgasket

What kind of numbers am I supposed to be aiming for as well? I believe I read that .060 is the minimum clearance? I'd appreciate any help at all.


Modified by paopao at 4:46 PM 1/12/2006
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Old 01-09-2006, 06:24 PM   #2
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also wondering in my build, got 13.5:1cr and 1mm oversize valves, and spec c cams....if anyone knows help me and this fellow out!

also how many * would be safe on the cams?
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Old 01-09-2006, 06:33 PM   #3
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Default Re: (B18 CYA)

Yeah, help out the guys who are too lazy to clay their motors.
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Old 01-09-2006, 07:34 PM   #4
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Default Re: GSR Build - Piston to valve clearance? (paopao)

No one has any input? I have to put this motor together on Wednesday!
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Old 01-09-2006, 07:42 PM   #5
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Default Re: (paopao)

Quote:
Originally Posted by paopao
Yeah, help out the guys who are too lazy to clay their motors.

werd
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Old 01-09-2006, 08:48 PM   #6
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Default Re: (B18 CYA)

No one is gonna say because they wont want to be responsible for giving the ok and then u scattering the thing.
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Old 01-09-2006, 08:53 PM   #7
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Default Re: (Used2beAb16)

I was just wondering if +/-2 degrees is enough of an adjustment range.
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Old 01-11-2006, 01:16 AM   #8
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Default Re: GSR Build - Piston to valve clearance? (paopao)

Well, I'm gonna clay the motor tommorow using +/- 4 degrees for adjustment. I don't think the gears will be turned anymore than that when it gets tuned this weekend. I'll be sure to post up the results tommorow night.
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Old 01-11-2006, 02:01 AM   #9
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Default Re: GSR Build - Piston to valve clearance? (paopao)

what we need to do is start a list of people who have clayed motors...have them list out there motor specs and any machiene work...and list out the clearances they find from claying...if we got enough data we could start to see what kind of clearance we have in other similar setups
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Old 01-12-2006, 01:45 PM   #10
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Default Re: GSR Build - Piston to valve clearance? (paopao)

Finally finished claying the motor. Results were as follows:

Quench pads - .050
Intake valves - .050
Exhaust valves - .050

This was with the cam gears set at -5 degrees on the exhaust, and +5 on the intake.

I was surprised that the values were the same for everything, but that's how it came out. Setup is listed above, hope this will be able to help some people with similar setups.
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Old 01-12-2006, 07:47 PM   #11
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do it again with the cams at different degrees!
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Old 01-12-2006, 08:32 PM   #12
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Default Re: (B18 CYA)

Why? I don't think I'm gonna have to adjust the gears past +/- 3 degrees, and I have enough clearance at 5 degrees.
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Old 03-31-2006, 08:32 PM   #13
 
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Default Re: GSR Build - Piston to valve clearance? (paopao)

are the blox type bs simalar to crower stage 3s??? i have about the same set up but my head was only milled .020.. im going to clay the motor this weekend and i was wondering if i should look for simalar numbers?? .050???
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