 What to do to 2.0L Heads?, For performance and reliability |
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| ThinAir |
 Feb 16 2004, 11:02 PM
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#1
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Best friends  Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region 
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Well I've gotten started on rebuilding the 2.0L 4 cylinder engine that was in the car when I got it. I got it all torn down last week and on Saturday I got the case in to Competition Engineering to have them ensure that when the lifters went bad they didn't damage the case.
So looking ahead... what would you do to the heads to help with creating a solid daily driver that gets the most output (both horsepower and mpg) out of a stock FI 2.0L with Euro pistons in it? |
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| Jake Raby |
Feb 16 2004, 11:12 PM
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#2
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Stock rebuild
12mm plug modifcation 42x36 valves single H/D springs |
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| Bleyseng |
Feb 16 2004, 11:13 PM
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#3
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Send them to HeadflowMasters and have them rebuilt and ported.
Geoff |
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| ThinAir |
Feb 16 2004, 11:29 PM
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#4
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Best friends Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
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http://www.audiracvws.com/914porscheracingheads.htm is this the right address for HeadflowMasters?
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| swood |
Feb 17 2004, 12:02 AM
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#5
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
Yup.
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| Mike9142.0 |
Feb 17 2004, 09:22 PM
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#6
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Member Group: Members Posts: 219 Joined: 29-January 03 From: Phoenix, AZ Member No.: 208 Region Association: Southwest Region |
Why 12 spark plugs?
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| Jake Raby |
Feb 17 2004, 09:28 PM
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#7
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
It reduces the chamber cracks by 90% easily... Its standard for all my 2.0 heads. The 2.0 chamber is terriable for cracks. Get it hot once and its cracked-
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| ChrisReale |
Feb 17 2004, 09:28 PM
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#8
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
QUOTE(Mike9142.0 @ Feb 17 2004, 07:22 PM) Why 12 spark plugs? Jake has all the poop on this, but I believe it has something to do with making the spark plug holes stronger so they dont crack as easily, as the 2.0L heads are known to |
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| ThinAir |
Feb 17 2004, 10:19 PM
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#9
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Best friends Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
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QUOTE(Jake Raby @ Feb 16 2004, 10:12 PM) 12mm plug modifcation So just exactly what is this? Does this mean you are using a larger size spark plug or is it more like an insert in the head so that the spark plug isn't directly threaded into the head? |
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| Dave_Darling |
Feb 17 2004, 10:37 PM
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#10
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Smaller spark plug. Weld up the hole in the head, drill and tap for a smaller spark plug. Smaller hole == more material around the hole == less chance of cracking.
Doesn't do jack for the short radius of the exhaust port, which is the other place where 2.0 914 heads like to crack... (IMG:style_emoticons/default/sad.gif) --DD |
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| ThinAir |
Feb 17 2004, 10:43 PM
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#11
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Best friends Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
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Does the smaller hole limit your selection of plugs or are you still able to get plugs in the correct temperature range?
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| Jake Raby |
Feb 17 2004, 11:54 PM
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#12
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
A Ducati motorcycle uses the exact same heat range as my engines do... They are 12mm and available in NGK
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| Zeke |
Feb 18 2004, 12:19 AM
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#13
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Never left, but not right.... Group: Members Posts: 382 Joined: 26-January 03 From: Long Beach CA Member No.: 197 Region Association: None |
There isn't one part of the type4 that Jake hasn't fooled with. Ducati plugs. Next thing will be Volvo pistons, Mecedes rods, an oil pump from a Caterpillar, heads from a 911 and EFI from some GM machine. (IMG:style_emoticons/default/rolleyes.gif)
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| Jake Raby |
Feb 18 2004, 12:31 AM
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#14
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
There are TONS of things that we have not learned yet.. I learn atleast one big thing a week on average... When you stop learning- its because you are dead or dying!
The TIV has many mysteries- just wait till my new heads are done and the key to the power door will be opened really wide- and they'll cool too! |
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