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Registered
Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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Mahle Motorsport PS98015
Currently installing a set of subject cylinder kits and was hoping someone has calculated the dome volume. Any help would be appreciated.
Thinking you in advance, Rusty |
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04-06-2023, 09:55 AM
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Now in Florida !
Join Date: Aug 2012
Location: York Beach, Maine and Anastasia Island, Florida
Posts: 406
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Mahle-Motorsports spec's the crown volume at 38.5 CC's
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1983 911SC Coupe Hot Rod - Platinum - Twin plugged 3.4, DC-60 cams, PMO 50's, 1 3/4 headers, Bill Rader 915 w/LSD 1976 914 2.0 Lime Green Metallic - Completely stock |
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04-06-2023, 01:03 PM
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Registered
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https://www.us.mahle.com/en/motorsports/powerpak-pistons/porsche-powerpak-piston-kits.jsp
Select your engine and all the specs are there. |
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04-06-2023, 01:07 PM
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Registered
Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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Thanks all for your direction.. I was odd be a few cc on the dome volume calculation. Feel better now. Still with 1mm of deck clearance I’m not to 10.1 cr.
Happy Easter. |
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04-07-2023, 12:48 PM
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Registered
Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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One other item. Do the cylinder heads need to be opened a bit for the 98 mm and if so anyone have a method short of the machine shop?
Thanks |
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04-07-2023, 12:50 PM
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PCA Member since 1988
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The "slip in" kits do not require machining.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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04-07-2023, 01:38 PM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,992
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Slip in kits do not require case machining. He was asking about heads. Take a good look at the set up, you *may* want to chamfer the head combustion chamber depending on your particular set up.
Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-14-2023, 05:04 PM
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Registered
Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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Thanks all, . Will chamfer the combustion chamber a bit to match the 98 vs 95 bore.
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04-14-2023, 05:16 PM
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PCA Member since 1988
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IIRC, the 98mm slip-in's are no wider at the top or bottom than the 95's. Es verdad?
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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04-14-2023, 10:31 PM
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Warren Hall Student
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Most of the pistons they make these days have a flat land at the edge of the dome so a chamfer isn't needed. If the dome runs to the edge of the piston then you probably need a chamfer.
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Bobby _____In memoriam_____ Warren Hall 1950 - 2008 _____"Early_S_Man"_____ |
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04-24-2023, 08:13 PM
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73' Porsche Targa
