building a 1911 from a 1.7, will my existing heads work? |
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building a 1911 from a 1.7, will my existing heads work? |
bradtho |
Aug 22 2011, 11:18 PM
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#1
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Member Group: Members Posts: 266 Joined: 22-December 09 From: Seattle, WA Member No.: 11,165 Region Association: None |
I'm thinking about taking my stock 1.7 to a 1911. Some old threads seem to suggest that you can't do this with the 1.7l heads, while others seem to suggest it's fine. Can anybody set me straight on if I would need new heads, if they'd need to be machined, or if I'm good to go?
Also, I've got 2 engines all with original german cylinders. Am I better off taking the best 4 and boring them out or going with new chinese cylinders (local shop recommends QSC). I've been thinking if I've got 4 decent ones that the OE cylinders would likely be better than the chinese stuff. anything else I should be thinking about? |
HAM Inc |
Aug 27 2011, 02:29 PM
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#2
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
QUOTE have you ever tried this with 2.0 liter heads? Some sort of cylinder ring might do the trick... Wondering if this setup, with the higher flowing heads, may get to that magic 40mpg number.... The nice thing about the long stroke-small bore is that the intent is to build torque at low speeds, which benefits/needs smaller ports for velocity. I suppose one could devise a way to install the 2.0 914 heads, but that would defeat the purpose of the design. For the street the longer the stroke the better IMO. I like my torque down low and lots of it. Sometime back Jake and I collaborated on a powerplant built to the 90.5 x 78.4 specs with 1.7Q heads that had 40x34mm valves and relocated plugs. IIRC it ended up in a Ghia that broke well over 40mpg hwy. |
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