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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Mon Jan 10, 2011 5:26 pm Post subject: Heads |
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I just got a junk engine that I may teardown this week. I thought it would be a good excuse to start a new topic. I poped the v/c's and got the # off the heads 311101375 and 311101375g. My book says they're F.I. t3 heads with no ledge. Its a bug case and it came out of a bug. Anyone know anything about these ? Are they good for a t1 mild performance build? If they're not cracked that is. _________________ Shane Price
74 standard beetle |
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Clyde
Joined: 03 Jun 2006 Posts: 855 Location: Athens
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Posted: Mon Jan 10, 2011 5:45 pm Post subject: |
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You want 8mm valve stems. If they're 9mm, it'll be a little harder to find new exhaust valves and guides, plus the FI valve heads are a little smaller than carbed valves. And most people don't have the reamers and seat cutters for the FI sizes.
I took a set of FI heads to Gabriels for a rebuild a few years ago, and they kinda laughed at me and said "these ain't worth rebuilding." _________________ '69 Bug, 1776, dual kadrons, Web 111 cam
Clyde's Aircooled
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Mon Jan 10, 2011 7:49 pm Post subject: |
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These arnt like bug FI heads. Theyre 35.5x32. T3 FI heads. From what I read theyre same as dp carb bug heads but alittle higher comp. _________________ Shane Price
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Clyde
Joined: 03 Jun 2006 Posts: 855 Location: Athens
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Posted: Mon Jan 10, 2011 8:37 pm Post subject: |
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More compression is just what you want. 8:1 with a stock cam is good. _________________ '69 Bug, 1776, dual kadrons, Web 111 cam
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Mon Jan 10, 2011 8:51 pm Post subject: |
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What do you think of scat cams? Like a C20, which seems to be a smll step up from stock. _________________ Shane Price
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Clyde
Joined: 03 Jun 2006 Posts: 855 Location: Athens
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Posted: Tue Jan 11, 2011 1:46 pm Post subject: |
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C-25 is just like the Engle W-100. High torque at low rpms. Don't have to wind it out like crazy all the time. It idles smooth too. _________________ '69 Bug, 1776, dual kadrons, Web 111 cam
Clyde's Aircooled
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Tue Jan 11, 2011 8:49 pm Post subject: |
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ok. I started tearing engine down. Heads are in realy good shape. No cracks. A broke fin here and there but nothing to worry about. I need to pop the valves out and look at guides. Dont really matter though. i'm goonna put in new guides and do a valve job. One head has a ledge and other does not. i will just bring em to you to be cc'd Clyde. Can you cut the seats? I can send em to percision and have em 3 angled if you cant. _________________ Shane Price
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Clyde
Joined: 03 Jun 2006 Posts: 855 Location: Athens
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Posted: Tue Jan 11, 2011 10:11 pm Post subject: |
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I can cut the seats, CC them, and flycut them to match. Can't grind valves, though. _________________ '69 Bug, 1776, dual kadrons, Web 111 cam
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Tue Jan 11, 2011 10:16 pm Post subject: |
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Awsome. I'll get with you probably this weekend once I know alittle more about these heads and decide what I'm gonna build. _________________ Shane Price
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Mountain Power House
Joined: 26 Jul 2006 Posts: 879 Location: Aircooled Heaven USA
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Posted: Tue Jan 11, 2011 11:09 pm Post subject: |
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REPLACE the exhaust valves. Once you experience a dropped exhaust valve, you'll understand why.
Grinding intakes is fine, until they are cut enough to become knife edged (then they'll burn) but don't play with the exhaust.. _________________ Jake Raby
57 Oval
64 Porsche 356C Outlaw
66 Bug -The Plague Returns!
73 VW Thing (Will I ever finish it?)
73 Superbeetle (Suby Power!)
76 Porsche 912E (X3!)
79 VW Iltis 4X4 |
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Tue Jan 11, 2011 11:16 pm Post subject: |
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Oh yeah. I always replace exhaust valves. I've seen what happens when you downshift on the exit ramp on 80k+ engine. Any engine I build at the very least gets exhaust valves and guides. After 80k its a tickin time bomb. _________________ Shane Price
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Tue Jan 11, 2011 11:52 pm Post subject: |
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BTW Jake, You mentioned about me using your balancer to balance my internals when I built my engine. Is that still doable? _________________ Shane Price
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Mountain Power House
Joined: 26 Jul 2006 Posts: 879 Location: Aircooled Heaven USA
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Posted: Thu Jan 13, 2011 2:20 am Post subject: |
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Yeah.... On a weekend some time that I am working in my shop.. _________________ Jake Raby
57 Oval
64 Porsche 356C Outlaw
66 Bug -The Plague Returns!
73 VW Thing (Will I ever finish it?)
73 Superbeetle (Suby Power!)
76 Porsche 912E (X3!)
79 VW Iltis 4X4 |
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serprice
Joined: 26 Nov 2007 Posts: 349 Location: Statham
1974 Volkswagen Beetle
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Posted: Thu Jan 13, 2011 10:12 am Post subject: |
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Cool Ill get with you on that in the near future. Thanks! _________________ Shane Price
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