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Old 04-06-2007, 02:01 PM   #11
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Gear Mods

Quote:
Originally Posted by MetroMPG View Post
CO - you're having this done to your car?
I have the 7% O/D 5th gear only in the car right now(since Monday).

No $2500 jobs for me. My cost for the gearset pictured: $200 for precision grinding + $55 for junk transmission. Almost finished. The gears are ground and pressed together.

Sending gears to my brother in IL to do the welding. He is a certified pipefitter and does the quality welding you see in the pictures.

After welding, I will hone the gear bores myself and assemble the rest. My good neighbor will give me a hand installing the trans.

Can't wait to see 1850 RPM at 56 MPH. Will be 33.05 rpm per 1 mph vs. 43.63 rpm per 1 mph with original gears.
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Old 04-07-2007, 03:40 AM   #12
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Gear Mods

Dear CO ZX2,

zpiloto has just replied to a thread you have subscribed to entitled - Trans
gears. - in the General Tech forum of GasSavers.

This thread is located at:
http://www.gassavers.org/showthread....4&goto=newpost

Here is the message that has just been posted:
***************

---Quote (Originally by CO ZX2)---
Here is a link to a gear mod from a friend I have been in contact with for some
time. Lots of good pics. His machinist used wire Electrical Discharge Machining
to modify the gears. I decided on grinding for my parts, mainly for local shop
capability and cost. A lot of work for a .545 vs .770 fifth gear but lowers my
engine RPM by 30%.

http://mypeoplepc.com/members/tleone/gears/

P.S. omg, please reply to my PM sent you earlier this week.
---End Quote---


zpiloto: Was this your car that was modified?


CO ZX2:

No, it was not my car. That car belongs to the author of the site in the link.

But I am preparing a similar gearset now. Should be done soon. See above reply to MetroMPG.
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Old 04-07-2007, 04:01 AM   #13
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cheeper to try taller tires than to change gears
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Old 04-07-2007, 05:27 AM   #14
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Ah. I never thought of doing it that way. Wire EDM is cool stuff, we do quite a bit of wire and sinker electrode EDM processes at my work. Beautiful welds on the gears BTW. Were they heat treated after welding?

Quote:
Originally Posted by CO ZX2 View Post
Dear CO ZX2,

zpiloto has just replied to a thread you have subscribed to entitled - Trans
gears. - in the General Tech forum of GasSavers.

This thread is located at:
http://www.gassavers.org/showthread....4&goto=newpost

Here is the message that has just been posted:
***************

---Quote (Originally by CO ZX2)---
Here is a link to a gear mod from a friend I have been in contact with for some
time. Lots of good pics. His machinist used wire Electrical Discharge Machining
to modify the gears. I decided on grinding for my parts, mainly for local shop
capability and cost. A lot of work for a .545 vs .770 fifth gear but lowers my
engine RPM by 30%.

http://mypeoplepc.com/members/tleone/gears/

P.S. omg, please reply to my PM sent you earlier this week.
---End Quote---


zpiloto: Was this your car that was modified?


CO ZX2:

No, it was not my car. That car belongs to the author of the site in the link.

But I am preparing a similar gearset now. Should be done soon. See above reply to MetroMPG.
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Old 04-10-2007, 03:37 AM   #15
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Interesting I don't think I would want to change my current gear ratios, but would like another gear of 0.5:1 overdrive or something . My current gears are quite good for hypermiling anyway; 5th is 50mph / 1900rpm or something like that.
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