 Going to the Runoffs, Upgrading my engine (pictures) |
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| ChrisFoley |
 Sep 3 2003, 10:46 PM
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#21
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I am Tangerine Racing  Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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I finished prepping my heads. The combustion chambers have about 38.5 cc volume.
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| ChrisFoley |
Sep 3 2003, 10:48 PM
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#22
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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and installed my special valve springs to check the piston to valve clearance.
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| ChrisFoley |
Sep 3 2003, 10:49 PM
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#23
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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The intake valves interfered by about 80 thousandths so I made a fixture to cut reliefs.
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| ChrisFoley |
Sep 3 2003, 10:50 PM
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#24
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Here are the finished pistons. With .040" deck height the compression ratio will be about 11.4 to 1.
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| seanery |
Sep 3 2003, 11:02 PM
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#25
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,854 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
look nice!
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| ChrisFoley |
Sep 3 2003, 11:08 PM
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#26
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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I temporarily installed the heads and checked the rocker geometry. I ordered a set of custom chrome-moly pushrods 1mm shorter than stock to optimize the valve lift and minimize valve guide side pressure. I am using swivel feet and recessed them into the rocker so there will be some adjustment available.
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| ChrisFoley |
Sep 3 2003, 11:09 PM
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#27
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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I thought about using my specially modified rockers, but will probably save them for the next engine.
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| ChrisFoley |
Sep 3 2003, 11:12 PM
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#28
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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The ends of the valve adjusters have to be shortened so they don't hit the valve covers. I still have to check the rings to make sure the gap is correct. Then I'll clean everything and assemble. Hopefully the engine will be done this weekend and back in the car before my dyno appointment Tuesday morning.
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| Brad Roberts |
Sep 4 2003, 01:05 AM
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#29
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
You should at least knock the casting flash off the other rockers and polish them up.
I see you like to flycut to the point that the combustion chamber becomes one with the holes for the exhaust studs....LOL Looks great man. Should run like a champ. B |
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| crash914 |
Sep 4 2003, 05:32 AM
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#30
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its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Hey Chris. what are you using to repair the heads with? Can you use a small Tig for the aluminum? I got one at work and have not tried it yet for aluminum....I do understand that you need high frequency though.....
When you get to the run0ffs, look up Bruce Allen from New Hampshire....He was running as one of my early instructors and now has a new respect for the 914.....He is running formula continental I think..... Good luck!!! Herb |
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| ChrisFoley |
Sep 4 2003, 06:20 AM
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#31
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Brad,
Yeah, I am working on the rockers more today. They will be better looking before long, but I'm not going to lighten them much. This was my first time filling the back of the stud hole. I don't think I actually flycut deep enough to hit them, but took precautionary measures just the same. Herb, You need at least 150 amps of AC with continuous high frequency to make the heat required to weld thick sections of aluminum like heads or crankcases. I have read that some new machines work well with DC current for aluminum but haven't seen it in operation. Aluminum welds so differently from steel and takes mucho practice to do it well. I don't see Bruce on the final entry list. Only Phil Lombardi from New Hampshire, #33FC. Thanks. (IMG:style_emoticons/default/smile.gif) |
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| jdogg |
Sep 4 2003, 06:34 AM
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#32
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Member Group: Members Posts: 431 Joined: 28-January 03 From: Youngsville, NC Member No.: 204 |
Chris, have you finished your oil cooler ducting? How about a pic of the finished product.....
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| maf914 |
Sep 4 2003, 06:39 AM
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#33
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None
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Chris,
Thanks for all the great photos. Nice work. Now, with your and Brad's comments, I understand how a deep flycut can get into the exhaust studs. Jake had explained that to me but I didn't really visualize it before. Best of luck at the run-offs. I wish I was going. A good friend of mine from Virginia is running a car for his son in FV, Bill and Justin Barker, and they wanted me to join their group. I should have planned better! Mike |
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| ChrisFoley |
Sep 4 2003, 06:40 AM
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#34
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(jdogg @ Sep 4 2003, 08:34 AM) Chris, have you finished your oil cooler ducting? How about a pic of the finished product..... It's not quite finished yet, but here's a good look: Attached image(s) 
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| Part Pricer |
Sep 4 2003, 06:45 AM
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#35
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Believe everything I post Group: Benefactors Posts: 1,825 Joined: 28-December 02 From: Danbury, CT Member No.: 35  |
Excuse my ignorance but...wouldn't it be better to have the intake ducts lower on the car. I seem to remember that hot air rises. It seems to me that you would be creating undue turbulence with the hot air attempting to exit where the cool air is coming in. Would the cool air ever get to the cooler?
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| ChrisFoley |
Sep 4 2003, 06:57 AM
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#36
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Paul, both those ducts are inlets and in a high pressure area on the front of the car. The primary outlet is directly below the cooler - the two plugs in the floor are removed, as well as the small holes in the front of the trunk which are behind the airdam, therefore in a low pressure area. As far as heat rising, it won't have much choice with the ram-air effect at 100mph. (IMG:style_emoticons/default/ohmy.gif)
I'm somewhat constrained by rules, which is why I'm changing the previous configuration in the first place. Even removing the floor plugs may be somewhat debatable as to legality. BTW, I'm not allowed to duct the exit air, or at least extremely limited. |
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| URY914 |
Sep 4 2003, 07:04 AM
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#37
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I built the lightest 914 in the history of mankind. Group: Members Posts: 121,451 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
What sorta HP are you getting?
And what is your red line or shift RPM? Great pixs (IMG:style_emoticons/default/smilie_flagge24.gif) Paul |
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| ChrisFoley |
Sep 4 2003, 07:17 AM
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#38
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(URY914 @ Sep 4 2003, 09:04 AM) What sorta HP are you getting? And what is your red line or shift RPM? Great pixs (IMG:style_emoticons/default/smilie_flagge24.gif) Paul I'll post that after my dyno session next Tuesday. I'm hoping for 110-120hp at the flywheel for this combo. I'm not using a race cam, and this will become my third tier engine when I have the funds to assemble an all out screamer and a primary backup as well. I was shifting at about 6200 before the upgrades, with redline at 6500. |
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| Brad Roberts |
Sep 4 2003, 11:45 AM
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#39
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Maf.. this is exactly why I shoot pics. I can talk all day... but to show you is where you will learn the most.
Chris.. I may have a cam for you on the next engine (the cam) you could run the LN lifters against it and build out from there. Your new shift chip will be 8k and you will need much bigger cooler(s). The one you have now just barely cools our stock 2.0 engines. B |
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| ChrisFoley |
Sep 7 2003, 11:22 AM
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#40
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(Brad Roberts @ Sep 4 2003, 01:45 PM) Chris.. I may have a cam for you on the next engine (the cam) you could run the LN lifters against it and build out from there. Your new shift chip will be 8k and you will need much bigger cooler(s). The one you have now just barely cools our stock 2.0 engines. B Brad, I have a couple of Elgin cams designed just for my application. One of them works up to 8k. But, I'm open to suggestions. I did a little more head work on the milling machine. I like to use an aircraft CHT sensor which requires a special hole. Attached image(s) 
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