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? |
Montreal914 |
Nov 2 2017, 09:16 PM
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#41
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Senior Member Group: Members Posts: 1,541 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California |
About 30 years ago (IMG:style_emoticons/default/rolleyes.gif) I had a 1776cc type 1 (Beetle) which was 69 x 90.5. They were CIMA pistons. Could this be what this old thread was referring to? (IMG:style_emoticons/default/confused24.gif) I was unaware a T1 cylinder could be mated to a T4 case. Arent the registers ..smaller? @Dave yes I should have used "Rods / crank to attain" a 78.4mm stroke. So as Jake likes to say , its all in the Combo...? I was only referring to the pistons being 90.5mm. I don't think type 1 cylinders would fit a type 4 engine. |
MikeInMunich |
Apr 12 2020, 12:34 AM
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#42
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Member Group: Members Posts: 392 Joined: 19-November 13 From: Munich, Germany Member No.: 16,674 Region Association: None |
It'll require some tweaking of the MPS, and possibly other adjustments. --DD I am running D-Jet on a 1911. Without modification, it actually did work well, but then I ran into a problem as my MPS diaphragm deteriorated and the vacuum seal became more compromised. Naturally that would cause a problem no matter what. But when I put in a refurbished MPS with a perfect seal I had the same hesitation Problem only much worse, about which there is a thread here that I began, and the solution was to swap the yellow 1.7 injectors to the higher volume green ones which came with the 2.0 Liter D-Jet. So, apparently, the fact that it worked well at first seems to perhaps been a fluke, with the imperfect MPS vacuum seal having been coincidentally in just the right „range“ that the system sent out a mixture that worked well for the 1911 displacement. |
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