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PanelBilly |
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#1
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914 Guru ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 5,880 Joined: 23-July 06 From: Kent, Wa Member No.: 6,488 Region Association: Pacific Northwest ![]() ![]() |
Seems like its money we'll spent to change the gears and take full advantage to all the power a bigger engine produces, but what did you do? And if you didn't, do you regret it or are you happy starting in second?
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PanelBilly |
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#2
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914 Guru ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 5,880 Joined: 23-July 06 From: Kent, Wa Member No.: 6,488 Region Association: Pacific Northwest ![]() ![]() |
I think I screwed up the poll questions!
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mepstein |
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#3
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914-6 GT in waiting ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 19,847 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region ![]() ![]() |
For my 3.2 conversion I had Doc Evil pull the first gear and add an H gear for 5th. I have a spare box if things go wrong or I want to experiment with other combos. I have not driven the car yet.
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Trekkor |
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#4
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I do things... ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California ![]() |
C or D first gear. Totally worth it!
I run the C first. It's good to 45mph at 7k and you can downshift into it at will. I run the stock F 2nd, flipped ZD 3rd ( Ka ) S 4th and X 5th. I would only change 5th to a stock ZD if it were a street car. (IMG:http://www.914world.com/bbs2/uploads_offsite/i944.photobucket.com-1413-1390614810.1.jpg) |
SLITS |
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#5
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"This Utah shit is HARSH!" ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None ![]() ![]() |
I run a stock 914/4 box and am happy with it. Even my 911 buddies are changing their gear boxes to a /4 5th ....
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r_towle |
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#6
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
Depends upon what type of driving you intend to do.
Street, autox, track? Money well spent, yes. But I suggest you drive it stock first, then choose. Get a core, spend the time after you are driving it to clean up a second transmission and build it as you find will work for the type of driving you are doing. |
Eric_Shea |
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#7
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PMB Performance ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 19,301 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains ![]() ![]() |
Agree with Rich. You can support the motor and yank the tranny fairly easily but, if you know your intended use you should be able to put something together that works for your style and your engine.
I'm not in favor of a taller first for one reason, the shaft isn't really strong enough for that type of driving with that type of torque. I've had mine spin the shaft right there. Life is not fun with first rattling around in your tranny nose cone. I would concentrate on 2nd-4th to take advantage of your power and torque band and plan 5th for best mileage and economy. The only problem with having a tall 5th in an air cooled motor is, they can depend on the RPMs and the fan to keep them cool. This is why the 914-6 received a Za gear for 5th. If you have a front cooler, which I think you do, you can worry less about that. I'm not sure what a Carrera gear set would be but, there's a car of similar power that has a front cooler and, in stock form, would potentially deliver the best cruising fuel economy in 5th. You're also lighter so you may be able to go slightly taller and get away with it. Here's how the theory played out in my tranny. I'm a 2.5 SS so it will be quite a bit different. I went with a stock first and second then, M, S and instead of the familiar "X" I used the stock 6's Za. I wanted a gear tall enough for cruising but short enough to play well with the S if I had to downshift on a long grade. You have torque and tons of it. If I recall from building your suspension, you want a street driver that you can have fun in the twisties with. |
Dr Evil |
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#8
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Send me your transmission! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region ![]() ![]() |
A bigger 1st is costly and unnecessary for street. My favorite setup that gets good reviews is A, F, O, X, flipped H with elimination of A depending on the engine. I also agree that stock /4 gears are pretty dang great and inexpensive.
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Trekkor |
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#9
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I do things... ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California ![]() |
I found my C gear set for $100 at a Porsche shop.
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brant |
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#10
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914 Wizard ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 11,945 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains ![]() ![]() ![]() |
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Dr Evil |
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#11
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Send me your transmission! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region ![]() ![]() |
Ya, Trekkor always likes to brag about his $100 C gear. Its not a fair comparison to tell people as the chance they will find one is slim. Last I checked they were $700-1000.
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Mark Henry |
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#12
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that's what I do! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada ![]() |
I have both, sort of... one is a stock 914/4 and the other is a A, F, O, X, HB
I know Doc..... not as good as an H... (IMG:style_emoticons/default/rolleyes.gif) (IMG:style_emoticons/default/jerkit.gif) (IMG:style_emoticons/default/biggrin.gif) |
Dr Evil |
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#13
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Send me your transmission! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region ![]() ![]() |
Nah man, HB is only a tooth different. Good gear (IMG:style_emoticons/default/smile.gif) I have one for sale for a rebuild (IMG:style_emoticons/default/ph34r.gif)
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brant |
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#14
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914 Wizard ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 11,945 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains ![]() ![]() ![]() |
F/J/O/S/V
redline 7500... up to 7800 or more if you're brave but the stock 4 cylinder box wouldn't bother me on the street I feel like you could use 1st gear if pulling away normally maybe not for burn outs, full throttle torque, but normal use |
PanelBilly |
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#15
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914 Guru ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 5,880 Joined: 23-July 06 From: Kent, Wa Member No.: 6,488 Region Association: Pacific Northwest ![]() ![]() |
Nah man, HB is only a tooth different. Good gear (IMG:style_emoticons/default/smile.gif) I have one for sale for a rebuild (IMG:style_emoticons/default/ph34r.gif) So where is HB on the chart? |
Mark Henry |
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#16
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that's what I do! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada ![]() |
HB is a oddball 4 speed gear between H and HA. It's not on some charts. HA is a 5 speed 2nd and can't be used.
H, and HB are 4 speed 2nd gears that are flipped making a 5th. Flipped H is a sought after gear for the V8 crowd. This chart shows the gears and what boxes they are in, of course many boxes now have who knows what in them. (IMG:http://www.914world.com/bbs2/uploads_offsite/3.bp.blogspot.com-26-1390719202.1.JPG) |
wndsrfr |
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#17
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,449 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region ![]() ![]() |
Seems like its money we'll spent to change the gears and take full advantage to all the power a bigger engine produces, but what did you do? And if you didn't, do you regret it or are you happy starting in second? First consider what tires you're going to use on the track. I'm very happy with the stock gearing on my 2.7/6 using 225 45 15 tires which are about 5 percent smaller diameter than stock. this give the benefit of a re-gearing for the track and lowers the car about three quarters of an inch. On the street I'm using 225x50x15 and don't abuse first gear at all. |
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