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911tracker85's Avatar
 
Join Date: Feb 2009
Location: Park Hills, KY
Posts: 2,502
Quote:
Rob...I was referring to minimum rpm to shift from 3rd to 4th while driving 'slowly'.
I understood. I was finding it funny to see similar comments on more than one thread.

dont recall where I read this but true, 'the 911 is easy to drive hard and hard to drive easy'


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Bob Cox
84 928S, Ruby Red linen/brown interior - preferred DD
87 924S resurrect and gut and another track car...
86 944 turbo my new DE/track car.
78 930 clone project car.
Old 10-10-2016, 06:11 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 19,566
Quote:
Originally Posted by 356911930 View Post
Hi Matt,

Sorry about the T. I'm usually more aware of the correct spelling of names as mine seems to get butcherd more often than not.

Quote { We are talking tenths of a second on track. You would never know the difference of a 1.00 versus 1.04 3rd on the street. }

1.04 3rd gear? Isn't stock 3rd 0.89? Or are you talking about a custom gear you make. When I talk about gears I'm usually talking in generalities as I do not know what exact ratios are available. So ratios close to the ones I listed above are fine.

Matt, so I assume you have built 930 transmissions with lower 2nd and 3rd gears, stock 1st and 4th.

Gear Ratio __________2.25, ______1.526, _____1.04,_______0.656

Overall what was the driving impression for daily and spirited driving. I wonder why these were not the original stock ratios?

Rahl
Hello Rahl,

The 1.04 was an arbitrary example. It just happened to be the next shorter 3rd gear past the 1.00 you are considering. I make both ratios, but the point of the post was that what you've been thinking about is "good enough" and making small changes won't even be noticeable. What will be noticeable is how much different any of these options is from what you have now.

Available ratios can be viewed on our website:
930 Gears | Guard Transmission
Not all ratios listed are kept in stock. Some are by order only. The popular ratios, which include the ones you are considering, are on the shelf.

Regards,

Matt
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1974 914 Bumble Bee
2004 40 Jahre
2008 Cayman S Mule
Old 10-10-2016, 08:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
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Join Date: Apr 2011
Location: Santa Cruz, CA
Posts: 1,314
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Hi Matt,

Thanks for the Link to your website! I looked over some of the gears and the optional gear ratios in the range I'm looking for are greater than I anticipated. I will be plugging some into the gear chart that I'm using to see what the RPM spread is.

Would it be better to keep the lower gears closer, ratio wise or, or th ehigher gears?

Thanks,

Rahl
Old 10-11-2016, 08:46 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 19,566
The reason I like the 2nd gear you are considering is the functionality I described in my first post. It works within the mph range one would expect on back country roads.

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1974 911 Restorod
1974 914 Bumble Bee
2004 40 Jahre
2008 Cayman S Mule
Old 10-11-2016, 09:04 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #24 (permalink)
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