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Macht Schnell
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
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---Les Garten---85 930, Andial IC, GHL Headers, Fabspeed Dual, K-27 HF2, 3.4 JE Full Finned 7.5:1 CR, 964 CAM'd, Carerra 3.2 Manifold Cut/Flipped, Tec3r, Siemans 55#, GSF Fuel Rails, Clewett Crank Trigger, Clewett Cam Trigger,Dual Plugged, ARP Head Studs/Rod Bolts, Clewett Wires.Tial 46mm WG, Tial 50mm BOV, WEVO Shifter,934 Boost Gauge, Wideband EGO Sensor/Gauge, C2T Head Gaskets, '88 MB 300TE,BMW R100RT |
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Man, no doubt Les...those freaking penguins will leave a mark on yo azz!
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP ![]() |
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Macht Schnell
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
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Hmmm, OK, Sounds like your story is validated... Sorry for doubting you.
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---Les Garten---85 930, Andial IC, GHL Headers, Fabspeed Dual, K-27 HF2, 3.4 JE Full Finned 7.5:1 CR, 964 CAM'd, Carerra 3.2 Manifold Cut/Flipped, Tec3r, Siemans 55#, GSF Fuel Rails, Clewett Crank Trigger, Clewett Cam Trigger,Dual Plugged, ARP Head Studs/Rod Bolts, Clewett Wires.Tial 46mm WG, Tial 50mm BOV, WEVO Shifter,934 Boost Gauge, Wideband EGO Sensor/Gauge, C2T Head Gaskets, '88 MB 300TE,BMW R100RT |
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Crotchety Old Bastard
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I try to stay near the stock tire height nomatter what the wheel diameter. Going too tall begins to look cartoonish.
For example: 245/55-15 = 25.6" tall 245/50-16 = 25.6" tall 245/45-17 = 25.7" tall 245/40-18 = 25.7" tall Doesn't accounting involve a little math? ![]()
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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Registered
Join Date: Jan 2007
Posts: 1,079
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Okay, but most of us start out at 245/45/16, which from memory is like 24.86".
So any of us going from that size are moving up almost an inch in diameter by going to the 17"s. This is the same as having slightly taller gears. My friend with a normal aspirated 911 went back to 16"s on his ride because he can feel the bigger tires take longer to get rolling. |
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Crotchety Old Bastard
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It is an example.
While being dependent upon tire size availability, wheel diameter has limited impact on tire height. Within the confines of rim diameter, such as 15 to 18 inches, aspect ratio is much more a factor. For example, if your buddy went from a 245/45-16 to a 245/40-17 the tire height would remain the same ~24.7" with a 1/2" reduction in sidewall height which would reduce sidewall roll for better handling. I do understand your point though as tire sizes and aspect ratios are limited. That is one problem with running 17" wheels; there are no rear tires manufactured that are perfect height. A perfect 17" rear tire (to me) would be 335/30-17. Front = 255/40-17. They don't exist.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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A fellow Pelacanite
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It wouldn't hurt my 930 to have slightly higher gearing as it has a G50/01 and I think 5th gear may be a custom ratio as it's not that different to 4th. My car in theory will only be able to do 160mph due to the gearing according to the rev counter and the speedo. IIRC I do about 75mph verified at 3000rpm
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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Registered User
Join Date: Sep 2004
Posts: 3,668
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Quote:
Im curious - does the 9.0 for SC/Carrera rear have the same specs as the 9.0 for Early turbo front or the 9.0 for turbo body with SC/Carrera chassis front? I've got a set of 9x17 front Fuchs weldups based on 9x16 Fuchs backspacing and offset measurements and they fit perfectly. These are on my '77 with widebody panels. |
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Registered User
Join Date: Sep 2004
Posts: 3,668
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My 15" setup on my NA car doesn't apply too much in this 930 thread. Also a quick fyi - my rear 275/40/17 Azenis measure out to be 25" tall on the 11" wide wheels. |
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Registered
Join Date: Jan 2007
Posts: 1,079
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That's pretty unusual for a 275 to be only 25" tall. The tire must be lower profile than others in the same size range, no? Did you keep the 17s? |
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Crotchety Old Bastard
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The 275 is only 25" tall because it is stretched on an 11" rim. Remember an 11" rim is actually 12" wide. That means the 10.8" wide 275 is using part of the sidewall to span the gap thus reducing sidewall height by 1/2" inch or so.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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Registered User
Join Date: Sep 2004
Posts: 3,668
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Registered User
Join Date: Dec 2005
Location: Vancouver, BC
Posts: 110
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Thanks for all the info on tire widths vs. rim widths.
I'm set on going with 11's on the rear. Now, who makes 315's in 17" these days? And for how much longer...? I think 18" will detract from the somewhat classic / sleeper look I'm trying to keep (one reason why I won't go the Kinesis route, even though I really like their wheels)... although the Zork may have already done that. ![]() rob |
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 10,750
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Are you looking for R comps or high performance summer tires?
Cheers
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Turn3 Autosport- Full Service and Race Prep jeff@turn3autosport.com 997 S 4.0, Boxster 2.7 Race Car, Cayman S 3.8, 958 Cayenne TT, VW GTI 2.1 TSI, Mini Cooper S JCW, Cannondale Supersix EVO SRAM RED E-tap, Cannondale Slice SRAM RED E-tap, Giant Roam Hardtail- to ride with the wife. |
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Registered
Join Date: Jul 2006
Location: Honolulu, HI
Posts: 7,197
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Quote:
Dunlop SP8000 Goodyear F1 GSD3
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Bryan O. 77 930 88 Carrera cab 14 535i M Sport |
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Registered
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Sorry to butt in.
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Kris @ Tech9 86' 930/GT-40R Sold ![]() 94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 10,750
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better late then never...
Here is a 17x9.0......
This wheel will have a couple of changes to it. The wheel outer wheel shell will be changed to look more like a fuch with a ramped profile and a soft lip. The wheel can be either blind mounted, like in the pics, or through bolted. The gap between the center and the rim shell will not be there on the production parts. This one will go off to get load tested..... ![]() ![]() ![]() Cheers
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Turn3 Autosport- Full Service and Race Prep jeff@turn3autosport.com 997 S 4.0, Boxster 2.7 Race Car, Cayman S 3.8, 958 Cayenne TT, VW GTI 2.1 TSI, Mini Cooper S JCW, Cannondale Supersix EVO SRAM RED E-tap, Cannondale Slice SRAM RED E-tap, Giant Roam Hardtail- to ride with the wife. |
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Registered
Join Date: Jul 2006
Location: Honolulu, HI
Posts: 7,197
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::sniff, sniff:: ::wipes tears from eye:: Those are just beautiful!
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Bryan O. 77 930 88 Carrera cab 14 535i M Sport |
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Its beautiful Clark!
Those are really nice.
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Kris @ Tech9 86' 930/GT-40R Sold ![]() 94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
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Blackbird Pilot
Join Date: Jul 2007
Location: The OC
Posts: 2,112
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Stunning, can't wait to see them mounted up with some rubber. Absolutly beautiful.
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Reaper | The Outlaw 930 Hotrod Gruppe Fünf Gruppen.com | The Baddest 934/5 Parts for the 911/930 D-Zug.us |
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