Page 1 of 2 1 2 LastLast
Results 1 to 15 of 18

Thread: Throttle body sync: Manometer requirements?

  1. #1
    Riding Dutchman jacco's Avatar
    Join Date
    Mar 2005
    Location
    Kensington, MD
    Posts
    431

    Throttle body sync: Manometer requirements?

    Hello,

    I'd like to do my own throttle body sync so that I don't have to spend the entire Saturday at the dealer again (busy summer season). From what I read on ibmwr.org it seems fairly easy to do, all I need to get is a differential manometer. What are the requirements for such a manometer, apart from two inputs so that it can do differential? I'd like to get a digital one if they're not too expensive. What are the requirements? E.g. range, resolution. Anything else I need to know before I start on this project? A manometer is the only 'special' tool I'll need, correct?

    Thanks,
    Jacco

  2. #2
    Has the GS-Lust The_Veg's Avatar
    Join Date
    Sep 2003
    Location
    Atlanta 'burbs
    Posts
    5,331
    Well, you could build one from a yardstick and about 20 feet of clear plastic tubing. This will cost you about $4.
    2012 R1200GS

    "If you can't fix it with a hammer, it's electrical." -somebody's dad

  3. #3
    Riding Dutchman jacco's Avatar
    Join Date
    Mar 2005
    Location
    Kensington, MD
    Posts
    431
    Quote Originally Posted by The Veg
    Well, you could build one from a yardstick and about 20 feet of clear plastic tubing. This will cost you about $4.
    I know. But there are cheap used manometers on eBay. I've never done a throttle body sync, that's why I'm trying to determine what kind of range/sensitivity I'll need. I don't mind investing a few (say up to 50) dollars to compensate for my lack of skill.

    Thanks anyway ,
    Jacco

  4. #4
    leave my monkey alone LORAZEPAM's Avatar
    Join Date
    Jun 2003
    Location
    West Salem, OH
    Posts
    2,888
    the manometers are cheaper, and easy to use, but the best too overall would be a twinmax. It is a true differential tool, and the mercury manometers use a separate tube for each TB. You have to get the tubes rising equally when balancing, and you aim for zero on the twinmax. I use the manometer for quite a while, and since I bought the twinmax, they are collecting dust now.
    Gale Smith
    2009 Versys
    1999 R1100RT

  5. #5
    Riding Dutchman jacco's Avatar
    Join Date
    Mar 2005
    Location
    Kensington, MD
    Posts
    431
    Quote Originally Posted by lorazepam
    the manometers are cheaper, and easy to use, but the best too overall would be a twinmax. It is a true differential tool, and the mercury manometers use a separate tube for each TB. You have to get the tubes rising equally when balancing, and you aim for zero on the twinmax. I use the manometer for quite a while, and since I bought the twinmax, they are collecting dust now.
    Thanks lorazepam. I read about the twinmax on ibmwr.org. Costs about $100 I think? But it seems that most digital dual-input manometers are also capable of computing the differential pressure between their two inputs. I was wondering if this would be a valid alternative (new approx. $200, but less when used, for example on eBay), since I could potentially use it for something else as well. But they come in a whole spectrum of ranges/sensitivities. I don't suppose we're talking tens of PSIs here, but to be honest I have no idea, really...

    Regards,
    Jacco

  6. #6
    leave my monkey alone LORAZEPAM's Avatar
    Join Date
    Jun 2003
    Location
    West Salem, OH
    Posts
    2,888
    I have seen the twinmax listed from 79.00 to around 90.00. To me it is a no brainer tool, and makes the job so easy. I cannot comment on the digital manometer units, having no experience with them, but more than one mechanic has said that the twinmax is their tool of choice for the job.
    Gale Smith
    2009 Versys
    1999 R1100RT

  7. #7
    Riding Dutchman jacco's Avatar
    Join Date
    Mar 2005
    Location
    Kensington, MD
    Posts
    431
    Quote Originally Posted by lorazepam
    I have seen the twinmax listed from 79.00 to around 90.00. To me it is a no brainer tool, and makes the job so easy. I cannot comment on the digital manometer units, having no experience with them, but more than one mechanic has said that the twinmax is their tool of choice for the job.
    Where did you see it for $79, if I may ask? Cheapest I could find is $81, plus $6 shipping. Still not bad. I'll wait a few days to see if this thread yields anything else, otherwise I'll stop being stubborn and go for the twinmax solution, as you suggest. At least I'll know it'll work...

    Best,
    Jacco

  8. #8
    Riding Dutchman jacco's Avatar
    Join Date
    Mar 2005
    Location
    Kensington, MD
    Posts
    431
    FWIW, I just placed an order for a twinmax...

  9. #9
    Registered User
    Join Date
    Jan 2005
    Posts
    1,848
    I bought a 4 cylinder carb/vacuum balancer (manometer style with mercury) from Dennis Kirk for about $50 a couple of years ago and it works great on everything that I have had it on. I have not tried a twin max but I am intrigued. The mercury one I have fits great onto the boxer TBIs and let you do all the same stuff. I began by doing the zero=zero adjustment on the position sensor to get a true baseline and then began the balancing and setting the idle by the gauge too. I followed the internet instructions I found on the IBMWR site (I web searched for zero=zero) and it was simple enough for even me.

  10. #10
    Has the GS-Lust The_Veg's Avatar
    Join Date
    Sep 2003
    Location
    Atlanta 'burbs
    Posts
    5,331
    Having suggested the $4 unit, I think I'll eventually get the Twinmax. No worries about the fluid getting sucked into the engine (doesn't hurt the engine, but makes the job more difficult), and you can put the Twinmax in your map pocket and observe what's going on under load.
    2012 R1200GS

    "If you can't fix it with a hammer, it's electrical." -somebody's dad

  11. #11
    Registered User
    Join Date
    Mar 2012
    Posts
    10

    Lightbulb

    the $4 version. I made this a bit big. I may be compensating... IMHO - you just can't beat physical mechanics and gravity. Twinmax is a decent option from what I've read but i only had $4 at the time. :-)

    Manometer.jpg

  12. #12
    Registered User
    Join Date
    Apr 2010
    Location
    Vancouver Island BC
    Posts
    76
    Quote Originally Posted by zoomtoob View Post
    the $4 version. I made this a bit big. I may be compensating... IMHO - you just can't beat physical mechanics and gravity. Twinmax is a decent option from what I've read but i only had $4 at the time. :-)

    Manometer.jpg
    My version is very similar to this, the only difference being that I scribed yardstick measurements on both sides of the stick. It's been a great soldier for me on my airhead and oilhead bikes however I must confess that I plan on splurging on Grok's Harmonizer in the near future....

  13. #13
    Rally Rat
    Join Date
    May 2011
    Posts
    180

    I have that one

    I made mine out of tube and stick like the one above. It works on all my bikes even my Kawasaki twin.

    No chance for operator error or poor voltage supply (battery)..

    Yes if one side comes unhooked or you use too much tube and the exhaust burns a hole in it the oil gets sucked into the throttle body and burnt. I used ATF and maybe up the stick two feet.

    Had it for years.

  14. #14
    Aspiring Profligate jeff488's Avatar
    Join Date
    Apr 2007
    Location
    Nacogdoches, TX
    Posts
    794
    Quote Originally Posted by The_Veg View Post
    Well, you could build one from a yardstick and about 20 feet of clear plastic tubing. This will cost you about $4.
    +1
    What I did. Works great.
    I did cough up the extra for a yellow aluminum yardstick. Looks really cool with the red ATF.
    '04 Silver R1150RT "Big Oel". '05 Yellow KLR 650
    '00 Red Suzuki Bandit 600
    '65 Allstate/Puch 250 twingle
    "I just want somewhere to ride and food when I get there."

  15. #15
    Registered User
    Join Date
    Aug 2006
    Location
    Scranton, Pa.
    Posts
    197

    Twinmax

    Been there, done that with homemade and mercury stiks.
    pay the shot and buy the twinmax. It will take all the guesswork out of things and your bike will run far better.

    Best,

    Will

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •