 Pulled the heads-pics, Back-up race engine needs work |
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| groot |
 Jun 29 2005, 07:37 AM
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#1
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Dis member  Group: Members Posts: 896 Joined: 17-December 03 From: Michigan Member No.: 1,444  |
As some of you know, #1 and #2 cylinders of my back-up race engine are pretty low on compression (110 and 115 psi) compared to #3 and #4 (145 and 150 psi). I squirted a bit of oil in the cylinders and the compression only gained a few psi.
So, I have a little break in the racing and I decided to pull the heads and do whatever valve work is required. Here are some pics. Looks like the intake valves hit the pistons a little bit, maybe on a over-rev during a downshift. Cyl #1 and #2 Attached image(s) 
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| Brett W |
Jun 29 2005, 08:02 AM
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#2
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None 
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Toss the head gaskets. While your in there snatch the cylinders off and run a dingleberry hone through the cylinders and slap some new rings in there? A little extra cylinderwall clearence in your case will free up a little HP. You may also look at having the cylinder tops and bottoms trued up on the lathe. Set your deck height up to .040 and no more. This will get your compression up. I'll toss some springs in the box with the fan. They have a little more pressure to protect you from float. They are new so you can put them on the heads and not worry about them.
While your in there unshroud the exhaust valves little and polish the chambers too. |
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Posts in this topic
groot Pulled the heads-pics Jun 29 2005, 07:37 AM
groot Cyl #3 and #4 Jun 29 2005, 07:38 AM groot Cyl head #1 and #2 Jun 29 2005, 07:39 AM groot Cyl head #3 and #4 Jun 29 2005, 07:39 AM groot Any thoughts or insights gleened from the conditio... Jun 29 2005, 07:43 AM r_towle looks like your mixture is off on one cylinder....... Jun 29 2005, 08:04 AM groot Thanks for the help...
So, you're thinking I ... Jun 29 2005, 08:36 AM Brett W Rings are cheap. Get a set of Hastings rings the... Jun 29 2005, 08:44 AM Thorshammer Kevin,
Good pics.
Starting with the pistons, I ... Jun 29 2005, 09:00 AM Joe Ricard Wow this should win the best thread of the week aw... Jun 29 2005, 09:23 AM groot I just dropped the heads off with a local shop for... Jun 29 2005, 10:40 AM
Brett W Hastings list the number as 2C5599. You can run a... Jun 29 2005, 11:42 AM |
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