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Sunday, 20 July 2025 |
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Montreal914 |
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,868 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California ![]() ![]() |
I was on the fence between using a 915 or a 901 style box for my 3.2 six conversion until recently where I read a comment from @ClayPerrine that the 70-71 911 (911/01) box was set up with the pull style clutch.
What I have in hand for my conversion: - 911/01 box - Three side shift 914 gearboxes - Various gear set ratios to have fun! (IMG:style_emoticons/default/driving.gif) - 100mm coarse spline output flanges to go with my 944 CVs My plan was to use: - Stock 3.2 flywheel clutch assembly currently on the engine - Get a 70-71 release bearing - Get a 72(?) clutch cable that would be straight pull (no cable pulley) I was going to use the 911/01 bits, flip the R&P, reset the pinion depth, use complementary 914 side shift trans cover, shifting, etc What I think I am undestanding from this thread linked below is: - The pull clutch setup works well - Yes, it can be tricky to get the release fork mating to the bearing upon assembly - I should not use the 3.2 PP as it will pull the fork pivot bolt? - I should use a 2.2 PP? - What disk should I be using? - Does this simply bolts on the 3.2 flywheel? - Is the clutch pivot shaft/arm at the pedal cluster different than 914, should I replace it? I just rebuilt my pedal cluster. Any inputs appreciated (IMG:style_emoticons/default/beerchug.gif) http://www.914world.com/bbs2/index.php?sho...267204&st=0 |
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Montreal914 |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,868 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California ![]() ![]() |
914World, the best! (IMG:style_emoticons/default/smilie_pokal.gif)
So, the decision point between using the 901 (whichever version) and the 915 (916) was based on these factors. BTW, this is for a narrow body street application. What I have in hand: - 3.2 with its stock clutch - 3x 914 side shift gearboxes - 70-71 901/01 (potentially a 71 since it has the extra casting underneath for the # and serial) - 1977 915/61 aluminum box w/electronic speedo 915 Pluses/Minuses: + Strength + Better ratios (5th from a later box would be best) + Plug an play with 3.2 clutch/flywheel + Output flanges 100mm (perfect for my 944 CV setup) - Weight - Shifting pattern (no dog leg (IMG:style_emoticons/default/dry.gif) ) - Shifting feel (I hear different things on this (IMG:style_emoticons/default/confused24.gif)) - Expensive Martin Bott kit - Ovaling of the bearing saddle at the pinion end? (Needs welded upgrade and 930 bearing, cost) 901 Pluses/Minuses: + Lightness + Dog leg (914 caracter) + I have already made my double support side shift console and work great + I have many gearboxes in hand to pick the best parts out off + It can use the pull clutch (with my 70-71 911 case) + 70-71 911 box has 914-6 ratios (A-GA-O-V-ZA), I plan on using AA-GA-O-V-ZD + Simple clutch cable setup (no chassis stress) - Week 1st gear (cantilevered) - Thought I could plug it directly with the 3.2 pull clutch, but no. - Expenses needed to flip R&P - Expenses for: 100mm output flange, release bearing, 71 clutch, other... The overall cost is also a big factor. I will have to go back to my spreadsheet and redo some calculations due to more components involved in the 911/01 use. ------ @ClayPerrine : Thank you for providing all of these very detailed instructions! If I go that route, I will precisely follow all of these instructions. (IMG:style_emoticons/default/pray.gif) 1. Stock 3.2 flywheel. - I have 2. 70-71 911 clutch disk. - I need 3. 70-71 911 pressure plate. - I need 4. 70-71 911 throwout bearing (very expensive these days). - I need 5. 70-71 911 transmission case. - I have 6. 70-71 911 clutch fork and pivot bolt. - I have (may get new pivot) 7. Your choice of gear ratios. - I have many 8. Billet aluminum intermediate plate. - I need 9. 914 side shifter rods. - I have 10. 914 side shifter tail cone. - I have 11. 914 side shifter console. - I have "There is a tab on the bell housing end of the transmission that is the anchor point for the clutch cable in the 911. You have to cut it off to provide clearance for the clutch cable to work properly. You can leave a nub and use that to mount the cable support." - Since this is 100% pull, the end of the cable sleeve does not need a stop, right? So some kind of nice P-clamp to hold the cable would do? - Vent: I did notice that difference and wondered. Thank you for the instructions to work around it. ----- @mepstein : Yes, I could do the KEP mod too. I was concerned by a comment @Steve posted on a while back sharing his experience with the KEP setup. This: http://www.914world.com/bbs2/index.php?s=&...t&p=2254465 ------ @sixnotfour : What is that anti-rotation strap you are referring to in this comment? "But if you drive hard the anti rotation strap locations will break.." ------ Thanks guys for sharing the knowledge/experience. (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif) |
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