 twin throttle linkage..., Why can't I get this to work????? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| crash914 |
 Mar 22 2005, 07:11 PM
Post
#1
|
|
its a mystery to me  Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region  |
ok, for all you twin carb/throttle body experts out there....
I have a redline weber twin throttle body set up....got the linkage cross bar etc. from the same place... I can't get this stupid thing to work correctly (IMG:http://www.914world.com/bbs2/html/emoticons/ar15.gif) I can get the right side to open and close fully and the other won't open all the way...I have switched everything around many different ways...even changed out the linkage cams...??? The linkages rotate into the center of the motor...flip the carbs around? so they rotate out? the ball for the cross bar is down...if I flip it over, it will interfer with the air cleaner?? THis is driving me crazy!!! the only thing that I can figure out is that the holes are drilled off. one must be out further than the other..or the carbs need to rotate different amounts...??? I also can't figure out how to mount the crossbar to the front of the motor...I guess I could make up another cable stop...but??? I guess I can shoot some pics when I cool down...now for (IMG:http://www.914world.com/bbs2/html/emoticons/beer.gif) thanks! |
   |
 
|
  |
Replies(1 - 19)
| MecGen |
Mar 22 2005, 07:24 PM
Post
#2
|
|
8 Easy Steps Group: Members Posts: 848 Joined: 8-January 05 From: Laval, Canada Member No.: 3,421 |
I think you would need to see a pic,
someone here will show you one for sure and if not, tomorow I'll snap a pic. Maybe run a search in old posts. Good luck cheers Joe (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) |
|
|
|
| john rogers |
Mar 22 2005, 07:26 PM
Post
#3
|
|
Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
Couple of things to check. Does each one open fully if the cross linkage is disconnected? They have to work that way since when setting them the linkage is disconnected. If you hook one side up will it open fully? How about just the other side will it open fully? If the problem is when both are hooked up then the linkage is flexing due to some misalignment. The drop shafts should be as close to vertical as possible and make sure the carb cams or what ever they are called are on the throttle shafts fully and tight. I've had them come loose and rotate some on their own. Finally make sure the arms on the cross shaft are tight and not slipping when you work the throttle. Grab'm and see it they move on the shaft. Good luck.
|
|
|
|
| crash914 |
Mar 23 2005, 06:30 AM
Post
#4
|
|
its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Thanks for the insite....
yes, the throttles open fully when disconnected. Yes the cams and levers are tight.. It looks like the cams (throttle levers) should be mirror image. They are not...looks close, but they are not exact mirrors. Anyone using a easy to set up linkage? whos? this one looks good but is a POS... I also think that I need shorter drop links..hmmm...got a couple of places to look for those... ready to can the whole thing.... (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) |
|
|
|
| Tom Perso |
Mar 23 2005, 06:56 AM
Post
#5
|
|
Crazy from the Cold... Group: Members Posts: 647 Joined: 8-August 03 From: Kalamazoo, MI Member No.: 1,003 |
Get the CB Performance linkage setup. I think it's $100 or so from them. It's way better than the redline one.
My friend has a Redline one on his 912 motor, it works fine... But, it does look cheesy. Later, Tom |
|
|
|
| JoeSharp |
Mar 23 2005, 08:13 AM
Post
#6
|
|
In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
If you have a center piviot linkage it is a POS. Won't stay tuned as the motor changes temp and hard to get right in the first place. I have the Hex Bar linkage on 2 sand rails and one of the 914s. Esay to adjust and once adjusted, if you are careful about how you treat them they will stay in tune for you.
I did these in '92. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) Joe Attached image(s) 
|
|
|
|
| Aaron Cox |
Mar 23 2005, 08:42 AM
Post
#7
|
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
never had a problem with my CB linkage....
miles ahead of bugpack, redline etc.... |
|
|
|
| rhodyguy |
Mar 23 2005, 09:26 AM
Post
#8
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
i don't know the dial in for the center pull linkage. i presume there is one rod for each side. if the rod length run is shorter on one side there may not be enough travel to fully open the butterflies on the that side. the triad pictured is far and above the best linkage i've EVER dealt with. it DOES cost more than other, imho, inferior products, but you get what you pay for. btw, the thottle cable holder comes WITH the linkage. it may seem insignificant, but when the linkage from cb shows up without one you'll be cobbing something together.
k Attached image(s) 
|
|
|
|
| GBallantine |
Mar 23 2005, 09:54 AM
Post
#9
|
|
Member Group: Members Posts: 74 Joined: 12-October 04 From: Toronto,Ont.Canada Member No.: 2,930 |
I use the CB Performance Hex Bar Linkage setup on my twin Weber IDF 44 race car . In order to have the carbs in sync on opening and closing the drop shaft linkage must be in a 90 degree vertical position to the carb cam. If you look at the left and right side of the air cleaner base plates the attachment arms where the hex bar connects are not a mirror image, they are offset. What I did was cut off and reweld the arm to create a mirror image on each base plate allowing the drop shaft linkage to connect in a straight line to the carb. Problem solved, carbs in sync.
GB |
|
|
|
| rhodyguy |
Mar 23 2005, 10:09 AM
Post
#10
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
staying in the verticle plane absolutely, is hard to achieve with regards to the down rods. use of hiem joints, like the triad, helps avoid the binding. i was pissed off enough when the cb one arrived without a t.c. holder. having to cut and weld a brand new item to optimise it's operation? the triad is a plug and play. powder coated out of the box.
k |
|
|
|
| Aaron Cox |
Mar 23 2005, 10:12 AM
Post
#11
|
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
kevin,
it took me 5 minutes tops to make a good throttle cable holder for my CB setup. i like it alot.... the triad looks great too. (Skline - post my engine picture) |
|
|
|
| rhodyguy |
Mar 23 2005, 10:17 AM
Post
#12
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
i just bolted mine on after i opened the box. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) does the powder coating on yours match the cross bar? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) bottom line...use what works for ya. another thing i didn't like on the cb, was the goofy little springs that ride against the ball ends of the rods. the rod will travel a bit as the springs compress, imho. get the engine good and warm, and set the travel on the cross bar with the end bolts and jam nuts. done deal.
k This post has been edited by rhodyguy: Mar 23 2005, 10:21 AM |
|
|
|
| Aaron Cox |
Mar 23 2005, 10:20 AM
Post
#13
|
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
aluminum has no need to be powdercoated (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
i agree....both work...... both look great.... use what works for ya... |
|
|
|
| rhodyguy |
Mar 23 2005, 10:24 AM
Post
#14
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
you got me there!!! it does like to be polished after it dulls a bit. (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif)
k |
|
|
|
| crash914 |
Mar 23 2005, 07:27 PM
Post
#15
|
|
its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
some pics of the set up...
Attached image(s) 
|
|
|
|
| Aaron Cox |
Mar 23 2005, 07:29 PM
Post
#16
|
||
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
there is your problem! links need to be vertical! that pivot needs to be 4" higher! (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) |
||
|
|
|
||
| Aaron Cox |
Mar 23 2005, 07:30 PM
Post
#17
|
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
not sure if you can see... but the pivot onb this is higher...and the links are vertical
(IMG:http://www.914world.com/bbs2/uploads/blog-1111623740.jpg) my motor (IMG:http://www.914world.com/bbs2/html/emoticons/wub.gif) |
|
|
|
| Series9 |
Mar 23 2005, 07:49 PM
Post
#18
|
|
Lesbians taste like chicken. Group: Members Posts: 5,444 Joined: 22-August 04 From: DeLand, FL Member No.: 2,602 Region Association: South East States |
You've got things backwards and upside-down. Turn the large gold piece on the end over so the pivot is above the top of the TB. I believe you will also have to flip the linkage end-to-end after doing this so it will fit.
|
|
|
|
| Series9 |
Mar 23 2005, 07:53 PM
Post
#19
|
|
Lesbians taste like chicken. Group: Members Posts: 5,444 Joined: 22-August 04 From: DeLand, FL Member No.: 2,602 Region Association: South East States |
After looking at it some more, I think you can just turn over the gold pieces on the end w/o flipping.
|
|
|
|
| crash914 |
Mar 24 2005, 06:04 AM
Post
#20
|
|
its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
I need to get some more pictures...
When I flip over the gold plates...I can't install the air cleaners!! Thats what got me thinking that my adjustable linkage is too long.. Stoooopid computer locked up last night and so I could not send any more...I will send some more later...thanks for the insite... |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 1st June 2024 - 08:34 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.