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 > Porsche 914 & 914-6 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
PCA7GGR's Avatar
 
Join Date: Jan 2003
Location: Dublin, CA
Posts: 5,162
"Shift" from 901 to 915 Tranny

My 3.2 has gone through two 901 ring/pinion sets and a case. So I am in the process of going to a 915 tranny. I have picked up a '73 tranny. Yeah, the seal is a pain to replace but I can use my existing Quaiffe LSD in it.

Here's my questions:

1. What linkage should I use? I am on the waiting list for WEVO's new setup but I am also interested in what other options are out there.

2. How do I hook up the speedometer to the 915 box?

3. Any words of wisdom/caution from those who have travel down this path?

Thanks
__________________
Sergio
PCA - 36yrs / Ex-RGruppe #197
'04 GT3 Halloween/SF Giants car
'11 E550 Coupe (Königstiger)
Old 01-12-2003, 01:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Jul 2002
Location: Brigantine, NJ
Posts: 136
Garage
Unhappy

I think you just removed any doubt from my mind that I should use a 915 rather than a 901 with my 3.6 conversion! I have wondered how truly reliable the 901 would be. I see so many references that it can handle 300hp and is OK with V8 conversions that I have considered trying it first and replacing it with a 915 if it breaks, but that means a wasted 3.6/901 DME flywheel and probably an untimely flatbed ride. Did yours fail while whoopin' on it?? Were your trannys old or fresh?

I do like the weight and shift pattern of the 901 and it's gonna cost a bunch of bucks to do the 915 properly. The tail housing/shift conversin alone is about $1800 bucks!
Old 01-12-2003, 05:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
John Rogers's Avatar
 
Join Date: Dec 1969
Location: chula vista ca usa
Posts: 5,207
Probably the "best" way to go (but not cheap) is a Fortin mid-engine tranny case and Hewland sequen- tial gears! I hear that combo is good for 1 to 2 seconds off your time at Willow Springs? Good luck.
Old 01-12-2003, 08:30 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Stay away from my Member
 
campbellcj's Avatar
 
Join Date: Aug 1999
Location: Agoura, CA
Posts: 5,752
I think one big reason many "hardcore" racers use the Hewland boxes, is you can change gears very quickly and easily (relatively speaking). So, you can exactly match your gearing to each track. It is a much bigger deal to do this with a 901 or 915 box, and some guys just keep 2 or 3 trannies around instead, with different setups.
__________________
Chris C.
1973 914 "R" (914-6) | track toy
2009 911 Turbo 6-speed (997.1TT) | street weapon
2001 F150 Supercrew 4x4 | tow vehicle
Old 01-13-2003, 09:52 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Administrator
 
Dave at Pelican Parts's Avatar
 
Join Date: Dec 1969
Location: Silly-Con Valley
Posts: 14,062
Garage
Send a message via AIM to Dave at Pelican Parts Send a message via Yahoo to Dave at Pelican Parts
Full-throttle shifts.

--DD
__________________
Pelican Parts 914 Tech Support

A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling
Old 01-13-2003, 09:52 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Stay away from my Member
 
campbellcj's Avatar
 
Join Date: Aug 1999
Location: Agoura, CA
Posts: 5,752
Quote:
Originally posted by Dave at Pelican Parts
Full-throttle shifts.

--DD

Oh yeah, that too -- you don't have to use the clutch much, once you get going, woohoo...
__________________
Chris C.
1973 914 "R" (914-6) | track toy
2009 911 Turbo 6-speed (997.1TT) | street weapon
2001 F150 Supercrew 4x4 | tow vehicle
Old 01-13-2003, 09:56 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Join Date: Apr 2001
Location: Clovis, CA
Posts: 822
Garage
When using the 915 what do you do for axels?
Old 01-18-2003, 08:11 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
PCA7GGR's Avatar
 
Join Date: Jan 2003
Location: Dublin, CA
Posts: 5,162
I don't know. I will let my mechanic figure that out. I just know that I won't be the first 914er with a 915 gear box. Several club members use this set up.
__________________
Sergio
PCA - 36yrs / Ex-RGruppe #197
'04 GT3 Halloween/SF Giants car
'11 E550 Coupe (Königstiger)
Old 01-18-2003, 04:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Join Date: Apr 2001
Location: Clovis, CA
Posts: 822
Garage
Sure and it was also used in competition by the factory not to mention in the 916.
I plan on going the same route I was just wondering if you use 915 flanges/axels out to the stub.
I'm guessing yes but I think that they are longer than the 914 axels
Old 01-18-2003, 07:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
fetus's Avatar
 
Join Date: Jan 2003
Location: Laguna Niguel
Posts: 261
Garage
Patrick Motorsports in Phoenix, AZ has special axles that use the 915 cv on one side and the stock 914 cv on the other.
I have a 3.2 with the 901 gear box and I'm also looking into the 915 gear box.
__________________
Steve
75 914-6GT clone with a 1984 Euro 3.2 motor, 1986 915 trans with Martin Bott 916 shift kit, MB911 heat exchangers, boxster brakes, etc...
Old 01-20-2003, 08:51 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
PCA7GGR's Avatar
 
Join Date: Jan 2003
Location: Dublin, CA
Posts: 5,162
I heard that VW bus axles will also work.
__________________
Sergio
PCA - 36yrs / Ex-RGruppe #197
'04 GT3 Halloween/SF Giants car
'11 E550 Coupe (Königstiger)
Old 01-20-2003, 08:56 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Join Date: Apr 2001
Location: Clovis, CA
Posts: 822
Garage
I really like the looks and design of the www.wevo.com 915 sideshifter.

IF anyone is running these Id like to have there input.
-
Kelly
Old 01-21-2003, 06:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Registered User
 
Join Date: Apr 2001
Location: Clovis, CA
Posts: 822
Garage
http://www.wevo.com/wevo915sideshift.htm
Old 01-21-2003, 06:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
Otto's Avatar
 
Join Date: Dec 2001
Location: Venice Beach, California
Posts: 838
Once again, all of you disbelivers, the 901 trans will work! You just have the wrong people working on it. Chris Campbell has seen me in my 914/6 3.8 RSR Motec 395 Jerry Woods dynoed HP engine still using a 901 that has been in the car for the last five years. We modify the differential housing so the pinion shaft will not walk on the ring gear. I had a916/Velious gear box in my 993 mid engined car, and even after Jerry Woods re-did the Velious stuff, it did not work all that well.
__________________
Racing Porsche for over 30 years.
http://www.OttosVenice.com

Check out the Porsche Owners Club Track event Videos
Old 01-21-2003, 10:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Registered User
 
Otto's Avatar
 
Join Date: Dec 2001
Location: Venice Beach, California
Posts: 838
BTW, Brad Roberts does not have five 901 transmission that I built that wore out the ring and pinions! The dick that broke ONE ring and pinion did not warm up the transmission properly and it did break. Whenever I build a transmission I send along instructions for usage. Simple-warm it up! You wouldn't jump out of bed and run a ten K without warning up would you?
__________________
Racing Porsche for over 30 years.
http://www.OttosVenice.com

Check out the Porsche Owners Club Track event Videos
Old 01-21-2003, 10:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Registered User
 
Join Date: Jul 2002
Location: Brigantine, NJ
Posts: 136
Garage
Otto, Could you outline what would be required to mod a 901 in order to have it live behind a 3.6 DME motor and give me a cost factor starting with a supplied 901 core? Respond either here or by PM. I have heard that if anyone can make it live, it's you!

Thanks!
Old 01-21-2003, 11:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #16 (permalink)
Registered User
 
fetus's Avatar
 
Join Date: Jan 2003
Location: Laguna Niguel
Posts: 261
Garage
Otto good to hear from you. I still have the home made silver 914-6 that you fixed up for me. You installed the Rich Johnson center motor mount, autopower roll bar, rebuilt the carbs and rear brakes. Your probably going to hate me but instead of overhauling the 2.7 motor I sold the motor with the carbs and bought a stock Euro 3.2 motor. I'm using the Kennedy stage 2 9" clutch and the stock 901 trans. The clutch does not feel right. At times its hard to shift and occasionally when I shift into 5th it pops out of gear. Once its in 5th it doesn't pop out. What are your recommendations for putting a 3.2 in a 914. Otherwise the car runs and rides great. The only thing I miss is the beautiful sound of the Webers.

regards,

Steve Faddis
Laguna Niguel.
__________________
Steve
75 914-6GT clone with a 1984 Euro 3.2 motor, 1986 915 trans with Martin Bott 916 shift kit, MB911 heat exchangers, boxster brakes, etc...
Old 01-21-2003, 08:40 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 05:28 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 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.