Inverted 915 Project, No Description needed |
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Inverted 915 Project, No Description needed |
pcar916 |
Sep 18 2017, 06:06 PM
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#1
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None |
Hi Folks,
I'm returned after a brief hiatus with a question. Some of you remember I have Penelope, a 914/993 machine. I have decided to replace the 914 transaxle with an inverted 915. How many of you have done it and do you have stories? :-) My thinking is as follows... 1. Billet side plate. I've already paid the price several times for deflection. The 993 is not a huge hp machine, maybe 270hp with a bit less torque depending on the RPM/throttle. 2. Cable shifter (any suggestions that don't include making one myself.) It would be fun but might take longer than I want to wait. 3. Already have the turbo flanges/CV's to accommodate the deflection angle. 4. Oil cooler already installed whether I need it or not. Already addressed in the trans cooler thread from years ago. Thought seriously about building a side shifter 915 with Bott's kit, but as good as it is, and it is. I don't want to take the gear-stack out every time I want to check the LSD plates/R&P. I've gotten a replacement 993 engine while I jazz up her (tired) original engine, but since I haven't done one of these builds, I figured I'd ask this crowd about it because I'd rather drive her while I build the engine. Glad to be back! Ron |
mepstein |
Sep 18 2017, 07:49 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Why don’t you flip the differential. It’s been done many times on the 914-6 conversion. An added benefit is eliminating the need for a billet side plate.
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Cracker |
Sep 18 2017, 07:54 PM
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#3
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
...and in the end, it still shifts like a crappy old box! There in lies the issue for anyone who wants a slick shifting transaxle. I have yet to see an impressive system first hand - maybe it exists, dunno. (IMG:style_emoticons/default/confused24.gif)
Tony Why don’t you flip the differential. It’s been done many times on the 914-6 conversion. An added benefit is eliminating the need for a billet side plate. |
mepstein |
Sep 18 2017, 08:13 PM
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#4
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I agree, a 915 box shifts like a 915 box but I learned how to shift on an early, worn out 914 tailshifter so everything else is more than acceptable to me. The conversion is also quite straight forward. The boxster trans will not just bolt up so it depends how far you want to take things. Tony’s cable shifted boxster trans with custom shift tower puts everything else to shame. (IMG:style_emoticons/default/driving.gif)
...and in the end, it still shifts like a crappy old box! There in lies the issue for anyone who wants a slick shifting transaxle. I have yet to see an impressive system first hand - maybe it exists, dunno. (IMG:style_emoticons/default/confused24.gif) Tony Why don’t you flip the differential. It’s been done many times on the 914-6 conversion. An added benefit is eliminating the need for a billet side plate. |
pcar916 |
Oct 9 2017, 11:06 AM
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#5
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None |
I agree, a 915 box shifts like a 915 box ... Tony’s cable shifted boxster trans with custom shift tower puts everything else to shame. (IMG:style_emoticons/default/driving.gif) Ok, maybe it's my lack of search skills, but can you point out a link to Tony's cable shifted Boxster trans that I can take a look at? Ron |
Cracker |
Oct 9 2017, 06:21 PM
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#6
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
Ron,
I never posted a "build thread" for my car - there is not too much to it really. If you have any questions you can PM me your info and we can talk about it. If you are running an AC engine, which I believe you are, adapting the G86 (and G87) trans is your biggest challenge. For shits and grins - a picture of my system is below... Tony I agree, a 915 box shifts like a 915 box ... Tony’s cable shifted boxster trans with custom shift tower puts everything else to shame. (IMG:style_emoticons/default/driving.gif) Ok, maybe it's my lack of search skills, but can you point out a link to Tony's cable shifted Boxster trans that I can take a look at? Ron |
pcar916 |
Oct 12 2017, 01:19 PM
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#7
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None |
Ron, I never posted a "build thread" for my car - there is not too much to it really. If you have any questions you can PM me your info and we can talk about it. If you are running an AC engine, which I believe you are, adapting the G86 (and G87) trans is your biggest challenge. For shits and grins - a picture of my system is below... Tony Thanks and nice looking machine! What's an AC engine? Mine is a NA 3.6L 993 engine which now is attached to a LSD 914 transaxle. Can't believe I ran it as an open-diff car for so long. Yours is a great cable setup and I'd like one that sits up next to the steering wheel as well. Did you fabricate it or buy it? I'd also like to talk to someone who has built and installed a 915 inverted just to hear any words of wisdom before I start designing and building everything from scratch. I have two 915's that can be used and the aluminum one is a 8:31 R&P. The mag-case is a 7:31, which I like a lot, both for weight savings and low-end grunt. I suppose I'll use the aluminum case box just for longevity sake. I know I'll have to do the following to the box... 1. Move the vent to the "bottom" 2. enlarge the oil pathways on the "top" of the inner case 3. fabricate a hoop-mount to mate with the 914 rear trans mounts 4. completely change my clutch/PP/Flywheel system 5. at least consider a hydraulic clutch system 6. cut a relief for the DME speed sensor 7. I don't know if the oil level remains at the side hole You know, gems of wisdom from someone who's done it! Ron |
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