914-6 conversion throttle bellcrank addition, Where to mount it? |
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914-6 conversion throttle bellcrank addition, Where to mount it? |
Jim2 |
Aug 1 2022, 05:04 PM
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#1
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
Would anyone have a picture handy which shows the factory location for the throttle bellcrank pivot shaft? I'm wondering if there is a usable boss on a regular -4 (HA?) transaxle which could be drilled to accommodate the shaft or if I need to come up with some other mounting arrangement.
Jim |
mepstein |
Aug 1 2022, 06:02 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,305 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Early transmissions have a boss. Late ones don’t. Rich Johnson (a914guy@aol.com) makes an adaptor that bolts on and then the bell crank bolts on to the adaptor.
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Jim2 |
Aug 1 2022, 08:23 PM
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#3
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
Thank you, I see now looking at pictures of older transaxles where there is some meat for a boss, my is 1974.
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carr914 |
Aug 2 2022, 04:00 AM
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#4
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Racer from Birth Group: Members Posts: 118,899 Joined: 2-February 04 From: Tampa,FL Member No.: 1,623 Region Association: South East States |
I think I have one -6 Intermediate Plate left that has the boss
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mepstein |
Aug 2 2022, 06:06 AM
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#5
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914-6 GT in waiting Group: Members Posts: 19,305 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I used a 911 intermediate plate (same as 914-6) on my conversion but when you change the plate you have to check the pinion depth. It’s not a quick switch. I had it done during the trans rebuild.
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brant |
Aug 2 2022, 06:09 AM
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#6
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
I built my own linkage mount and bell crank that bolts onto the back cover plate.
Pics in my race car thread |
Jim2 |
Aug 2 2022, 10:44 PM
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#7
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
I built my own linkage mount and bell crank that bolts onto the back cover plate. Pics in my race car thread Brant sir, thank you for leading me to your race car build, that is one spectacular machine! I took advantage of your pictures and replicated the bell crank bracket, and with that out of the way I can forge ahead with one of many other outstanding items. |
brant |
Aug 3 2022, 09:04 AM
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#8
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
I built my own linkage mount and bell crank that bolts onto the back cover plate. Pics in my race car thread Brant sir, thank you for leading me to your race car build, that is one spectacular machine! I took advantage of your pictures and replicated the bell crank bracket, and with that out of the way I can forge ahead with one of many other outstanding items. Nice Work! brant |
eyesright |
Aug 3 2022, 01:16 PM
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#9
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Member Group: Members Posts: 430 Joined: 8-January 12 From: OK Member No.: 13,979 Region Association: Southwest Region |
My 914-4 trans had a threaded boss for the pivot shaft. I purchased all the (used ) bellcrank parts and installed them. Worked fine, but the more I looked at it, the more I figured it was over-engineered. I took it off, made a mounting plated for the throttle cable that I anchored to the top of the engine case just in front of the sheet metal, and connected the throttle cable directly to the carb linkage. Worked great, nice solid feel, much simpler. Couldn't figure out why they didn't do it that way originally. Sorry I don't have a photo.
I sold the bellcrank parts long ago. |
mepstein |
Aug 3 2022, 02:28 PM
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#10
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914-6 GT in waiting Group: Members Posts: 19,305 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Sometimes you can’t get enough cable travel at the carbs without the linkage.
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Jim2 |
Aug 3 2022, 04:51 PM
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#11
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
My 914-4 trans had a threaded boss for the pivot shaft. I purchased all the (used ) bellcrank parts and installed them. Worked fine, but the more I looked at it, the more I figured it was over-engineered. I took it off, made a mounting plated for the throttle cable that I anchored to the top of the engine case just in front of the sheet metal, and connected the throttle cable directly to the carb linkage. Worked great, nice solid feel, much simpler. Couldn't figure out why they didn't do it that way originally. Sorry I don't have a photo. I sold the bellcrank parts long ago. I'm transplanting this six from another donor 914. I drove the donor car which had a cable from the pedal right up to the carb cross bar. It behaved like the throttle return spring needed to be stronger as the throttle would lag and close slowly. I added more return springs but found the pedal effort to be unusual, uncomfortable. I decided to just go with the six arrangement since it's close to a 911, which simply works and has good feel. I figure only bit of sheathed cable will now be nearly straight and shouldn't hang like before, same as a factory 6 car. |
speed metal army |
Aug 4 2022, 01:44 PM
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#12
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Waiting for the rain to stop... Group: Members Posts: 1,068 Joined: 4-September 10 From: PNW Member No.: 12,137 Region Association: Canada |
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brant |
Aug 4 2022, 02:26 PM
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#13
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
I like being able to use stock parts... like a cable
I've had to replace cables at the track during a race. you literally have 20-30 minutes to do the job before the next run at times... certainly don't want to have to source custom parts under that time frame. so helpful to use stock parts... I imagine the same could be true at an event or in another state at an event with a street car.... it would suck to need to order a custom item and wait a week for parts to arrive when you have a failure. |
SirAndy |
Aug 4 2022, 03:25 PM
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#14
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
No bracket needed. See if you can spot the throttle cable.
(IMG:style_emoticons/default/biggrin.gif) (IMG:http://www.914world.com/bbs2/uploads/post-179-1185423324.jpg) |
Jim2 |
Aug 4 2022, 06:36 PM
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#15
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
No bracket needed. See if you can spot the throttle cable. (IMG:style_emoticons/default/biggrin.gif) (IMG:http://www.914world.com/bbs2/uploads/post-179-1185423324.jpg) This makes me wonder why my cable was hanging up. Behaved like the sheath was full of grease. Andy, do you have a 901 or a 915 behind that 3.6? |
SirAndy |
Aug 21 2022, 12:23 PM
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#16
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Stock 901 which was meant to be temporary and to be replaced with a 915 i have on the shelf.
That was 15+ years ago and the 901 is still holding up. (IMG:style_emoticons/default/driving.gif) |
Jim2 |
Aug 21 2022, 01:37 PM
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#17
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Newbie Group: Members Posts: 24 Joined: 28-March 20 From: Calgary Member No.: 24,068 Region Association: None |
Well, that certainly instills confidence in the 901, and I'm only going to be running a 3.0. I assumed there was no way the little 901 gearbox would stand up to a 3.6 and I was worried about my 3.0 combination.
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SirAndy |
Aug 21 2022, 01:51 PM
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#18
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Well, that certainly instills confidence in the 901, and I'm only going to be running a 3.0. I assumed there was no way the little 901 gearbox would stand up to a 3.6 and I was worried about my 3.0 combination. One thing to note, i don't use 1st gear at all for normal driving. I take off in 2nd. If you are trying to put some serious torque through 1st gear, your 901 will die quickly. (IMG:style_emoticons/default/popcorn[1].gif) |
worn |
Aug 21 2022, 10:06 PM
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#19
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
Well, that certainly instills confidence in the 901, and I'm only going to be running a 3.0. I assumed there was no way the little 901 gearbox would stand up to a 3.6 and I was worried about my 3.0 combination. One thing to note, i don't use 1st gear at all for normal driving. I take off in 2nd. If you are trying to put some serious torque through 1st gear, your 901 will die quickly. (IMG:style_emoticons/default/popcorn[1].gif) With a 3.2 first gear is one that you have to get out of in a hurry. Not sure why I even use it. For a power upgrade consider taller gears for fourth and fifth gears in the 901. Especially if you want to run it as a GT on the interstate. I have grown to love the 901 tranny. |
NARP74 |
Dec 13 2022, 06:12 PM
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#20
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Senior Member Group: Members Posts: 1,072 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
No bracket needed. See if you can spot the throttle cable. (IMG:style_emoticons/default/biggrin.gif) (IMG:http://www.914world.com/bbs2/uploads/post-179-1185423324.jpg) This makes me wonder why my cable was hanging up. Behaved like the sheath was full of grease. Andy, do you have a 901 or a 915 behind that 3.6? @SirAndy , is that a stock 914 accel cable? Did you just run it up to the next bracket above the tin? What about the connection point, what did you use on the cable end? |
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