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VaccaRabite |
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#1
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En Garde! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 13,475 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region ![]() |
In a recent thread I noted that the ports on my 1.7 turned 2056 heads are 47x37.5mm. I don't know what the valve size is.
Is the valve size usually the same size as the port, or smaller? The heads are installed and I don't want to remove them unless I need to, but the engine is about to come out for conversion to EFI. The engines PO had the headwork done and I don't have all his notes. If the valves are the same size as the ports I am going to pull the heads to have proper fitted valves for my engine. Would too large a valve size lead to higher head temps? The PO said when I bought the motor that it ran warm and I have noted this myself even after rebuilding the bottom end in 2009. Its manageable but I do have to take care climbing hills on the freeway. |
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r_towle |
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#2
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,598 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
Not to make you roll your eyes....
BUT 47mm intakes may explain many of your issues. The heads and 2056 displacement cant support that....and it will make tuning it very hard. You may really want to look for the notes, or pull a head and take a look. I thought you rebuilt this at some point in time??? Rich |
VaccaRabite |
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#3
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En Garde! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 13,475 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region ![]() |
Not to make you roll your eyes.... BUT 47mm intakes may explain many of your issues. The heads and 2056 displacement cant support that....and it will make tuning it very hard. You may really want to look for the notes, or pull a head and take a look. I thought you rebuilt this at some point in time??? Rich, I rebuilt the entire bottom end in 2009. I did not touch the heads as the PO had them done not long ago at a shop in VA. I SHOULD have rebuilt them at the same time. I agree, if the valves are as big as my notes seem to indicate that could be a key to the running issues I have been having. QUOTE Take a picture and show us where you're measuring. I will. Is it not obvious where I should measure the valve diameter? Zach |
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