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? |
jmill |
Aug 27 2011, 02:18 PM
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#2
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
That's it!! (IMG:style_emoticons/default/piratenanner.gif) Thanks for the link. Below is some cut and paste info from the other site. -7.7:1 -RAT 9550 -1.7"Q" heads opened to 105mm register size (2.0) with 42X36 valves and no port work, by HAM. -Relocated spark plugs -stock crank and rods -RAT 96mm KB pistons and cylinders -RAT oil pump -36mm Weber carbs -Mallory Unilite dizzy It is imperative that you verify the current chamber volume and set CR accordingly with the tightest deck possible, optimum is .040 The 9550 also works well with very small carbs, like the Weber 36s. This is especially true with very high velocity ports and limited displacement. This is a D Jet compatible Combo. The 1.7 head works great for this combo due to the insane port velocity it offers and that port veocity is more imprtant than gross flow on this combo. |
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