 Engine build Take 2, The rebirth of my 2270 |
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| DNHunt |
 Jul 24 2005, 06:44 PM
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#101
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914 Wizard? No way. I got too much to learn.  Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598  |
Gerry and I completed deck height today. We set it up with .132" spacers under the cylinders and came up with a deck height of .049" on 1 and 2 and .050" on 3 and 4. the compression ratio works out to 9.90 so I'll use a set of .134" spacers to get tiny bit more deck and a little less CR.
Here's the gear ready to go Attached image(s) 
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| DNHunt |
Jul 24 2005, 06:45 PM
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#102
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
The lower end ready
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| DNHunt |
Jul 24 2005, 06:46 PM
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#103
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
The fixture on and torqued.
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| DNHunt |
Jul 24 2005, 06:50 PM
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#104
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
With the dial indicator on it
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| rhodyguy |
Jul 25 2005, 01:40 AM
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#105
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,252 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
this thread is a hoax. dave's garage is not that clean (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) .
k |
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| DNHunt |
Aug 1 2005, 06:47 AM
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#106
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Despite having to chase a washer Here's what we got done. Installed cylinders. Here is #4 going on.
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| DNHunt |
Aug 1 2005, 06:48 AM
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#107
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Installed heads
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| DNHunt |
Aug 1 2005, 06:49 AM
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#108
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Here is Gerry torquing 3/4 head down
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| DNHunt |
Aug 1 2005, 06:52 AM
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#109
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Checking valve train geometry. This is half lift on #3 exhaust. The adjuster is parallel to the valve stem. That's what the orange line represents.
On the intial build I used an adjustable pushrod and a lightweight spring on the valves so the adjustable pushrod wouldn't bend. This engine is so close that the same pushrods work so I just checked them with the normal springs. Much less work. Dave Attached image(s) 
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| DNHunt |
Aug 1 2005, 06:53 AM
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#110
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Another of the same thing
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| DNHunt |
Aug 1 2005, 06:55 AM
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#111
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Full lift on #3 intake. I'm also looking for coil bind. Lift is in excess of .510 on intakes
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| DNHunt |
Aug 1 2005, 06:56 AM
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#112
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Valve train done.
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| DNHunt |
Aug 3 2005, 05:52 PM
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#113
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
I had a thought. Jake put these lovely valve pockets in the pistons and the deck is a couple of thou tighter than before and the lift of the intake is a little more than I expected. Maybe I should check the piston to valve clearance. I don't want anything to kiss.
I used something I'm familiar with from the office red boxing wax. When I do a cap I cut 1.5mm right of the top of the tooth and I check that dimension with this stuff. What is sittiing in the valve pockets measures 2.5 mm. It's made to stick so it sat in here really well. After I did a couple of turns I checked them. Not a mark, so the clearance is greater than .110". I suppose it will be closer after everthing warms up especially the exhaust valve. I'm gonna run it. Attached image(s) 
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| DNHunt |
Aug 3 2005, 05:57 PM
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#114
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
One other detail. I decided to check the cam specs. I put a degree wheel from Tiava.com on the fan hub and a dial indicator on the valve spring retainer for #1 valves and then recorded where opening, closing .050 open and closed and max lift occured. It turned out close to the cam card so good to go.
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| Porsche Rescue |
Aug 3 2005, 06:08 PM
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#115
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
Dave, are you sure you found that at Tiava.com??????
Gotta be careful where you put that "i"! Thanks for the reference. |
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| Mueller |
Aug 3 2005, 06:27 PM
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#116
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914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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yep....try free degree wheel instead....opps (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) |
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| DNHunt |
Aug 3 2005, 07:51 PM
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#117
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Why what was I gonna link to? Nevermind I don't think I wavt to know.
Dave |
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| Jake Raby |
Aug 3 2005, 09:46 PM
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#118
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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 |
Dave, Good measurements...
With that cam and those pistons I got the exact same running clearance a couple of wweeks ago, within 2 thou! Was your max interferance point@ 8 degrees? I call .080 totally safe on clearance, so you have a mile left before things collide.. |
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| Flat VW |
Aug 4 2005, 01:12 AM
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#119
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Illegal Soapbox Derby Racecar Group: Members Posts: 1,692 Joined: 13-November 04 From: Phoenix, AZ Member No.: 3,105 |
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| DNHunt |
Aug 4 2005, 07:02 AM
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#120
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Jake
I didn't check where the closest poit is. I'm not sure how I would do that with the bodged setup I used for measuring. Next time the head goes on it's for good. the headstud should get here today. I'm waiting on 1 top ring. It looks like I'll fire it up Labor day weekend and get it installed. John I had the head off so I set TDC with a dial indicator like I measured deck height. It is spot on. I have used a pencil, eraser side in but, I'll always remember chopsticks. Dave |
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