 Cylinder to Block Gaskets, 2.0 Type IV |
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| Rhodes71/914 |
 Feb 20 2005, 04:18 PM
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#1
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Glacier  Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482  |
Seems like I read somewhere to leave these out.
Well... |
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Replies(1 - 11)
| Type 4 |
Feb 20 2005, 04:25 PM
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#2
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Member Group: Members Posts: 412 Joined: 30-September 04 From: Costa Mesa Calif. Member No.: 2,866 |
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| Allan |
Feb 20 2005, 04:34 PM
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#3
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
No head gaskets. I did lap mine to try and get a better seal though.
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| Rhodes71/914 |
Feb 20 2005, 05:02 PM
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#4
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
Sorry I titled the thread wrong, actually meant "shims" not "gaskets"
Did some reading on the STF... I think I will leave them out, should have enough deck height still. |
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| Allan |
Feb 20 2005, 05:14 PM
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#5
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
If your talking about the cylinder to case shims, I believe you want to keep those.
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| Demick |
Feb 20 2005, 05:44 PM
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#6
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257  |
You need to measure your deck height (without shims), and then CC your heads. From that you can figure out your compression ratio. If it is in the range you want, then leave them out. If you want to lower the C.R. then you will need to calculate the thickness of shims required, and if the supplied shims happen to be the right thickness, then use them. Otherwise, buy some cylinder shims that are the correct thickness.
Demick |
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| Jake Raby |
Feb 21 2005, 07:37 AM
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#7
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Don't just bolt the engine together without ccing and measuring deck-NEVER!
Compression is your friend if used wisely! |
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| Joe Ricard |
Feb 21 2005, 09:27 AM
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#8
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Banging your piston against the head is not a good thing @ high RPM either.
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| Rhodes71/914 |
Feb 21 2005, 04:52 PM
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#9
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
OK hypothetically speaking I should not have to much CR by not having the shims at the base of the cylinder since I have US pistons with the 5cc dish in them correct? Wasn't the original CR pretty low on these?
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| Dave_Darling |
Feb 22 2005, 04:04 PM
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#10
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914 Idiot Group: Members Posts: 15,063 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Well, hypothetically all machine-work is absolutely perfect, and nobody ever touched those cylinder heads until you tore them off the car, and every single part that gets bolted together on the motor is absolutely perfectly in the middle of its "tolerance range" to the millionth of an inch...
Oh, you mean you have a real-world engine with an unknown history, and not a hypothetical dream motor? Well, in that case, you really ought to CC the heads and measure up the deck height. --DD |
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| sean_v8_914 |
Feb 22 2005, 04:15 PM
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#11
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
I use this calculator here
http://www.btinternet.com/~mezporting/header.html San Diego Plastics GAVE me a 4"x4" pc of plexi. I cut it round to fit in teh chamber, drilled a 3/8 fill hole in teh middle. the pharmacy sold me a graduated in CCs beaker for $5. I put a thin bead of grease on teh plexi to seal it on there and filled it up. all this took less than an hour to do. my stock heads (I thought) only measured 50cc. should be 60cc |
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| sean_v8_914 |
Feb 22 2005, 04:20 PM
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#12
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
oh yeah, I should mention that at 60cc (hypothetically)it was a nice 8.5 to 1 but at the actual 50cc measured value it would be over 10 to 1. I think this would have been a disaster on pump gas
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