 Engine cooling...Heads vrs Cylinders, what item is more of an impact ? |
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| Mueller |
 Aug 30 2003, 10:21 AM
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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So what item?, the heads or the cylinders have more of an impact on engine performance and longevity when properly cooled?
If someone had a bolt-on kit for watercooling, would you rather have watercooled heads or watercooled cylinders? What temperature do the cylinders get to while the engine is working? |
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| airsix |
Aug 31 2003, 03:41 PM
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
I look at it this way. Review Porsches history.
(over simplified) First they built engines with iron jugs and aluminum heads. This got them to little more than 40hp per cyl. (early six) Porsche has NEVER gotten huge power out of an engine with iron cyls. They don't shed heat. As HP increased the iron jugs were replaced by aluminum. This got them to as much as 75-100hp per cyl. (911turbo-917) To get past the 75-100hp/cyl. cooling limit they watercooled the heads (935-959) for upwards of 125hp/cyl. Then the 962 got watercooled heads AND cyls and could manage 125hp/cyl. and could do it for 24 hours straight. (this was all off the top of my head so correct me if there are any errors) So it seems to me that first you need aluminum jugs, then you need watercooled heads, then you need watercooled everything. -Ben M. |
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Posts in this topic
Mueller Engine cooling...Heads vrs Cylinders Aug 30 2003, 10:21 AM
scotty This should make for an interesting thread... Didn... Aug 30 2003, 10:23 AM kwales Muller,
My money is on heads. They are exposed t... Aug 30 2003, 11:18 AM fiid I've got to go with heads. That must be why t... Aug 30 2003, 12:26 PM ArtechnikA URY914 Heads-hands down. Aug 30 2003, 12:46 PM Racer Chris The heads are already oil cooled to a greater exte... Aug 30 2003, 01:21 PM Andyrew QUOTE
Racer Chris <... Aug 30 2003, 02:17 PM redshift I say the jugs, what Chris said.
I want to invest... Aug 30 2003, 02:23 PM thesey914 I've never heard of a cylinder temp gauge but ... Aug 30 2003, 03:12 PM redshift So, what can you do to an alloy head to make it co... Aug 30 2003, 03:30 PM Dave_Darling Heads, all the way. From all reports, cylinder co... Aug 30 2003, 04:24 PM redshift But Dave.... I don't have alloy cylinders to s... Aug 30 2003, 04:37 PM Dave_Darling No guess-work required. LN Engineering and Raby h... Aug 30 2003, 07:52 PM maf914 Porsche went to water cooled heads on their air co... Aug 31 2003, 06:34 AM Brad Roberts The piston rings only move in a 71mm area at the t... Aug 31 2003, 11:42 AM Jake Raby Cooler cylinders translate into cooler heads- peri... Aug 31 2003, 04:13 PM fiid So we all hate cast iron cylinders. How tough wou... Aug 31 2003, 05:33 PM Dave_Darling Of course it's possible. If you've ever s... Aug 31 2003, 05:41 PM Jake Raby Iron cylinders are fine up to 96mm, but after that... Aug 31 2003, 05:47 PM bernbomb914 would the Brills be a good compermise? They are ab... Sep 1 2003, 10:14 AM
Jake Raby They cool 10% better....I have tested them. Good ... Sep 1 2003, 10:32 AM |
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