 1.8L Motor refresh, Which piston size is best??? |
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| catsltd |
 Sep 19 2016, 08:22 AM
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Member  Group: Members Posts: 181 Joined: 7-June 15 From: Calgary Alberta Member No.: 18,814 Region Association: None  |
I am going to install new pistons/cylinders,and refresh the heads.
Quick question. I am keeping the fuel injection on my 1.8L. So should I keep the stock 93 MM cylinders,or go to a 96MM aluminum for added cooling. If I go to the 96MM will I run into drive ability problems??. http://aapistons.com/products/vw-porsche-9...der-kit-914-bus. My compression went from 90 PSI hot motor throttle open to 150 PSI with a few drops of oil. Can I do this cylinders myself???. Thanks for any advice or suggestions. |
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| Mark Henry |
Sep 19 2016, 08:45 AM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
96mm KB pistons, iron cylinders get your cylinders bored if they're OE.
You can't do this yourself, AA cylinders are OK, but check the bore specs. If it's a full rebuild upgrade to a 2.0 crank and rods, then you have a 2056cc. L-jet will run fine on this combo with a WEB 73 cam, but you may lose the warm-up idle on start, so it will start sort of like carbs. You just need to give it a bit of gas, once warm it runs perfectly. Also KB pistons "slap" (sounds like knocking) on start up till the pistons get some heat into them. About 2-3 minutes, by 5 minutes slap is totally gone. |
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| malcolm2 |
Sep 19 2016, 11:27 AM
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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QUOTE(Mark Henry @ Sep 19 2016, 09:45 AM)  L-jet will run fine on this combo with a WEB 73 cam, but you may lose the warm-up idle on start, so it will start sort of like carbs. You just need to give it a bit of gas, once warm it runs perfectly. Sorry for the HIGHJACK: Mark, I have this problem. 1911 with 9550 cam, 1.8 heads with 2.0 size valves, L-jet (AFM has been tweeked several teeth) and it does not want to idle until I get to 300-ish CHT. After that, it idles ok. From your statement, it sounds like there is no way to fix???? (IMG:style_emoticons/default/confused24.gif) |
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Posts in this topic
catsltd 1.8L Motor refresh Sep 19 2016, 08:22 AM
Mark Henry
L-jet will run fine on this combo with a WEB 7... Sep 19 2016, 11:37 AM
Valy Yes you can do this yourself.
If you decide to go ... Sep 19 2016, 09:26 AM catsltd I dont want to go to a 2056,But thanks Mark.
And ... Sep 19 2016, 11:47 AM Mark Henry With the pushrod tubes out remove the lifters (IMP... Sep 19 2016, 01:11 PM |
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