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Join Date: Mar 2002
Posts: 3,563
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Head Job...
I thought that'd get ur attention
 Anyway, my baby is going in for a rebuild soon and I'd like some recommendations wrt head work. I'm intending to get the heads twin plugged so I can run a 964 dizzy and a Crane HI-6 ignition system. Also having GT2 EVO CAMs installed, Titanium Retainers, AlSiBr Valve Guides, Turbo Racing Valve Springs and depending on the condition of my existing valves, probably get some stainless ones made up. Is there anything else I should do to the heads whilst this work is being done? Thinking of longevity/reliability and of course performance  What about Extrude Honing for even airflow across all runners? Port'n'polishing? Oh, I'm also having 930 P&C's installed with ARP fasteners and 964 piston squirters.
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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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04-05-2004, 11:20 PM
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you know...when it comes right down to it...i'll bet that there's not a a single guy on this board who couldn't use a head job...as you describe.
 ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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04-06-2004, 04:52 AM
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Irrationally exuberant
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Why the Crane ignition? Does it get around having use the Andial splitter box or something?
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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04-06-2004, 05:47 AM
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Theres a very interesting inf going on, on www.c2turbo.com about cylinder heads...........no that I will know anything about that.............
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10.76@139-1/4 mile 0-1 mile 193MPH I Love to Shine Cars 
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04-06-2004, 05:47 AM
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LOL @ Ryan
Thanks Juan. Will have a browse and see what I can find out Oh Juan, what boost are you running on your monster setup? 1.4bar? Are you running racing fuel or something? What boost do you run on normal street/pump fuel?
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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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04-06-2004, 04:33 PM
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Are you running racing fuel or something?
93 must of the time, racing 1/2 of 93 1/2 of 116c What boost do you run on normal street/pump fuel? Since we start running 500hp+ we have always been set at 1.3 and 93, we will go to 93 and 1/2 110 and 1.5 bar on our latest set up
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10.76@139-1/4 mile 0-1 mile 193MPH I Love to Shine Cars
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04-06-2004, 05:07 PM
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Posts: 3,563
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WOW! That's some SERIOUS boost pressure there!
The force is strong on the dark side eh?
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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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04-06-2004, 05:23 PM
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Merv, not really..........
Problem is they have everyone fool about the boost on this cars, you know how many times I have heard people said that if you go over 1 bar the thing will blow up ?  this is just another example of how misleading the porsche community is, you must remember that Bellos was running 30 psi! we have run all the way to 1.6 bar and I have a friend that anything under 1.9 bar is unaceptable,never mind what the imports are running this days......
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10.76@139-1/4 mile 0-1 mile 193MPH I Love to Shine Cars
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04-06-2004, 05:41 PM
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Hi Juan. I meant it's serious boost for an air/oil cooled engine. I can understand that the Jap cars are running extremely high boost, but don't forget they are water-cooled and therefore are more efficient at extracting the heat away from the cylinders & heads etc...
Having said that, if you have the fuel & ignition maps all sorted properly with a solidly built engine platform, I don't see any reason why you can't run 1.6bar! Are you twin plugged, or still single plug? That will also allow you to run more boost due to the better, more even burn
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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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04-06-2004, 06:07 PM
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Join Date: Nov 2001
Location: AUSTRALIA
Posts: 3,492
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Merv, couldn't help noticing the WYDRYD on the hoist at WM. I take it you will be terrorising the WRX/VN Commo kiddies on the arterial again soon?
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Audi B7 S4 |
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04-28-2004, 03:09 PM
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1974 Porsche 911 2.7
The Blue Pheonix
1988 Porsche Carrera 3.2 Turbo
