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drag racing the short bus
Join Date: May 2002
Location: Location, Location...
Posts: 21,983
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Cylinder head question: Is there a better way to cool them?
Aside from what we know of the decklid grill and fan, is there any other way to bring more and cooler air into the engine compartment, specifically to cool the cylinder heads?
I'd like to see or at least read some suggestions. Thanks. 
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The Terror of Tiny Town |
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11-22-2005, 03:20 PM
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Bird. It's the word...
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Dave, do a search on Grady Clay's "Rubbermaid Solution" which uses the cooling effect of water and convection. I'm currently building a unit and will possibly trial it this weekend. It's mainly for limited duration, such as track days.
Cheers
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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11-22-2005, 03:31 PM
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drag racing the short bus
Join Date: May 2002
Location: Location, Location...
Posts: 21,983
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Cool, John - thanks. Please post photos if you get the chance.
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The Terror of Tiny Town |
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11-22-2005, 03:36 PM
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Registered
Join Date: Mar 2002
Posts: 3,563
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Some people remove the stone protector tray from under the engine to aid in cooling.
Not aware of any other methods.
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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11-22-2005, 03:57 PM
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Bird. It's the word...
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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11-22-2005, 06:53 PM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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David, have you investigated under the cooling shroud. Your problem appears to be unique to your car. I wonder if you don't have debris or the like covering the cylinders and heads, thus preventing them from being cooled like all the other engines out there.
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11-22-2005, 06:56 PM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
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Souk,
You mean like this? Never could figure out why the 2.4 in my '72 was not running correctly. Replaced it with a loaner 2.2 and pulled the original engine apart. Found that a mouse had used the top of my engine for a nice winters nest. This is in Berlin, circa 1988 or so. JoeA 
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2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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11-22-2005, 08:29 PM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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Yep!! I've found shop rags and dead mice in some engines I've taken apart. Not to mention the 1/4 inch or more of crud that's coated the engine.
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11-23-2005, 07:25 AM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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I think we're talking about latent heat of vaporization...not so much convection......
Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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11-23-2005, 08:07 AM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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Wil, I think David will chime in as soon as he wakes up on the west coast
 , but he has been having problems with his engine that others don't seem to have. Pinging under situs that others don't seem to have.
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11-23-2005, 08:15 AM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Souk:
I understand.... I'm answering Fishcop's opening remarks..... and offering some technical clarity to the defintion of the rubbermaid solution of Grady's. Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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11-23-2005, 08:23 AM
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Bird. It's the word...
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Yep... What Wil said
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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11-23-2005, 03:07 PM
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Irrationally exuberant
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I've seen that on other 911 motors. I wonder why mice like that spot?
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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11-23-2005, 03:51 PM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Here's something... I've posted before but no answers ( too far out, perchance?)...
How 'bout those lousy heat valves that are OPEN when there is no call for heat into the cabin? These flapper valves are way-up near the top of the rear shock tower...and they SPEW a hellacious amount of heat onto the ( ta da !) shock body ( no good !) and front of the engine...near the heads ( also no good!). Isn't there ANY way to attach SCEET or something to the discharge of these valves and route them closer to grade or behind the car ??? Even if the seal to the valves ( tough access) isn't perfect ?? - Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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11-24-2005, 09:33 AM
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Join Date: Mar 2004
Location: US
Posts: 1,621
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Will, it'd be better if the heat could be closed off completely, so that on cars with early style heat, cooling air for the motor is not diverted to go over the heater boxes. If the heat could be closed off, then all the air from the fan would be forced over the cylinders/heads. Plus the benefits you listed.
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11-24-2005, 09:39 AM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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J. Klauke:
We've been ( kinda) through this before...there is a reason that Porsche chose to design an air-flow path through these valves in the "closed" ( to the cabin) position...and NOT use a system that is used in air-cooled VW's. It might be for cooling the HX and not letting them get "too" hot when there is no flow to the cabin. So....I'd like to find a way to keep the design parameters in-tact...but simply put a tail-piece of tubing on the discharge side...so it can be directed elsewhere.... Anyone ?? Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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11-24-2005, 10:04 AM
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1969 Porsche 911T 2.7RS Spec with Webbers
The Blue Pheonix
