Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rating: Thread Rating: 1 votes, 5.00 average.
Author
Thread Post New Thread    Reply
Macht Schnell
 
les_garten's Avatar
 
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
Quote:
Originally Posted by sand_man View Post
Even though my degree is in accounting, boy I wish I would have paid attention to those Catholic Nuns trying to teach me math and science, back in the day!!! I feel like a dumb blonde (even though I have black graying hair) when it comes to gear ratios and such!!!
I'm not sure I believe this story, let me see the back of those hands?

__________________
---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
Old 09-19-2008, 04:37 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #41 (permalink)
resident samsquamch
 
sand_man's Avatar
 
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
Quote:
Originally Posted by les_garten View Post
I'm not sure I believe this story, let me see the back of those hands?
Man, no doubt Les...those freaking penguins will leave a mark on yo azz!
__________________
-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)
Old 09-19-2008, 05:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #42 (permalink)
Macht Schnell
 
les_garten's Avatar
 
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
Quote:
Originally Posted by sand_man View Post
Man, no doubt Les...those freaking penguins will leave a mark on yo azz!
Hmmm, OK, Sounds like your story is validated... Sorry for doubting you.
__________________
---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
Old 09-19-2008, 06:30 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #43 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,046
Garage
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?
__________________
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
Old 09-19-2008, 06:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #44 (permalink)
Registered User
 
Join Date: Jan 2007
Posts: 1,077
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.
Old 09-19-2008, 07:50 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #45 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,046
Garage
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.
__________________
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
Old 09-19-2008, 08:47 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #46 (permalink)
 
A fellow Pelacanite
 
NathanUK's Avatar
 
Join Date: Nov 2006
Location: UK
Posts: 2,002
Garage
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
__________________
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
Old 09-20-2008, 01:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #47 (permalink)
Registered User
 
Join Date: Sep 2004
Posts: 3,668
Quote:
Originally Posted by Jeff Alton View Post
There are 9's and 11's in the first production run.

Currently the build data looks like this....

7.5 and 8.0 for SC/Carrera front
9.0 for SC/Carrera rear

9.0 for Early turbo front
9.0 for Late turbo front
9.0 for turbo body with SC/Carrera chassis front
11.0 for turbo rear
11.0 for turbo body with SC/Carrera chassis rear
11.5 for turbo rear


cheers
Jeff,

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.
Old 09-20-2008, 05:13 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #48 (permalink)
Registered User
 
Join Date: Sep 2004
Posts: 3,668
Quote:
Originally Posted by DDDD View Post
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.
If you're referring to me I actually picked up a set of 15" Fuchs with 24" tall tires - mainly for the less unsprung weight and gearing differences.

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.
Old 09-20-2008, 05:22 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #49 (permalink)
Registered User
 
Join Date: Jan 2007
Posts: 1,077
Quote:
Originally Posted by Kaefer View Post
If you're referring to me I actually picked up a set of 15" Fuchs with 24" tall tires - mainly for the less unsprung weight and gearing differences.

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.

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?
Old 09-20-2008, 09:00 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #50 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,046
Garage
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.
__________________
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
Old 09-20-2008, 10:16 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #51 (permalink)
Registered User
 
Join Date: Sep 2004
Posts: 3,668
Quote:
Originally Posted by RarlyL8 View Post
The 275 is only 25" tall because it is stretched on an 11" rim.
Yep. The max rim width for a 275/40-17 tire is an 11" wheel. As a wheel gets wider for a given tire size the overall tire diameter gets shorter.
Old 09-20-2008, 03:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #52 (permalink)
Registered User
 
Join Date: Dec 2005
Location: Vancouver, BC
Posts: 110
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
Old 09-23-2008, 08:49 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #53 (permalink)
Registered User
 
Jeff Alton's Avatar
 
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 10,490
Are you looking for R comps or high performance summer tires?

Cheers
__________________
Turn3 Autosport- Full Service and Race Prep
jeff@turn3autosport.com
997 S 4.0, Boxster 2.7, Boxster S race car, 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
Old 09-23-2008, 09:47 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #54 (permalink)
Registered User
 
Join Date: Jul 2006
Location: Honolulu, HI
Posts: 6,072
Quote:
Originally Posted by rooked 930 View Post
Now, who makes 315's in 17" these days? And for how much longer...?
Sumitomo HTRZ
Dunlop SP8000
Goodyear F1 GSD3
__________________
Bryan O.
77 930
88 Carrera cab
14 535i M Sport
Old 09-23-2008, 09:56 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #55 (permalink)
Registered User
 
930gt-40r's Avatar
 
Join Date: Jan 2007
Location: Boca Raton, FL
Posts: 2,063
Quote:
Originally Posted by rooked 930 View Post
.
Now, who makes 315's in 17" these days? And for how much longer...?
I also think (could be wrong)that this size is still widely used among the late model Trans-Am and Camaro Z-28 guys.
Sorry to butt in.
__________________
Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 09-24-2008, 06:20 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #56 (permalink)
Registered User
 
Jeff Alton's Avatar
 
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 10,490
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
__________________
Turn3 Autosport- Full Service and Race Prep
jeff@turn3autosport.com
997 S 4.0, Boxster 2.7, Boxster S race car, 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
Old 10-17-2008, 09:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #57 (permalink)
Registered User
 
Join Date: Jul 2006
Location: Honolulu, HI
Posts: 6,072
::sniff, sniff:: ::wipes tears from eye:: Those are just beautiful!
__________________
Bryan O.
77 930
88 Carrera cab
14 535i M Sport
Old 10-17-2008, 09:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #58 (permalink)
 
Registered User
 
930gt-40r's Avatar
 
Join Date: Jan 2007
Location: Boca Raton, FL
Posts: 2,063
Its beautiful Clark!

Those are really nice.
__________________
Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 10-17-2008, 11:50 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #59 (permalink)
Blackbird Pilot
 
Reaper930's Avatar
 
Join Date: Jul 2007
Location: The OC
Posts: 2,112
Stunning, can't wait to see them mounted up with some rubber. Absolutly beautiful.

__________________
Reaper | The Outlaw 930 Hotrod Gruppe Fünf Gruppen.com | The Baddest 934/5 Parts for the 911/930 D-Zug.us
Old 10-18-2008, 02:37 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #60 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 06:48 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.