Carb tuning needed
08-23-11, 10:50 AM
#1
RollinRock
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Carb tuning needed
Anyone have a lil know how on tuning a 48Weber IDA? We have completed the TRE dogg, and the initial tune is great but Im looking to maximize the potential Of the carbs and motor. Let me know if you have some pointers and/or if you can adjust carbs like a pro.
08-23-11, 05:14 PM
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RollinRock
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4 what?! I learn better by doing rather then digging through opinions from members. Im looking for a person who knows how
to tune a carb. Not a book to tell me how to do it. GIVE ME THE FISH. ILL LEARN HOW TO FISH LATER!
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09-06-11, 11:45 PM
#11
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Try the guys at RRR (rotary racing & reliability) out in Orange. Nelson or Nick should be able to help you out. Nick helped me out a little with my IDA setup when i was having problems. And they can get you any jet you might need...usually within 1-2 days. GL
09-07-11, 11:55 AM
#12
72' Rx2 Turbo
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Are you having N E issues with the tune? 48IDA's are pretty decent set up. Actually got a couple of pair still laying around the garage I think.
Basically, with the carb set up your gonna be going through a lot of plugs while tuning (depending how cold your plugs are ). There really isn't that much involved with tuning a carb. In a nutshell you've got:
Carb's are simple, limited because everything is based on "Jet Size" or in other words a hole which, is fixed therefore depending on what you are tuning for will effect other area's of driving.
Back in the day used to ALWAYS keep an extra plug set in the car! Also, daily driving usually ran 1 step hotter plugs.....Only changed plugs right before a race
to help eliminate the chances of a mis-fire.
One thing you probably want to get your hands on is a synchro meter. Will make throttle plate adjustment a breeze.
Good way to start off call someone like Racing Beat up and see what spec's they recommend for your set up. Once you get that you can change the tune based on the type of driving you want to do. The more "race" tune you go with will cost you fuel/drivability.
Basically, with the carb set up your gonna be going through a lot of plugs while tuning (depending how cold your plugs are ). There really isn't that much involved with tuning a carb. In a nutshell you've got:
- Velocity Stack - enhance your response/torque (top, bottom, or mid range ) depending on stack height/diameter.
- Venturi's - again tuning of your air speed/volume.
- Throttle Plate - adjustment
- Linkage - Make sure it's not binding and you're throttle plate is vertical at max pedal.
- Emotion Tube - where fuel and air mixture takes place.
- Air (Main) Jet - goes onto your emotion tube to set air/fuel ratio mixture.
- Fuel (Main) Jet - fixed onto your emotion tube to set air/fuel ratio mixture.
- Idle Jet - controls fuel at idle.
- Mixture Screw's - adjustment for rich/lean (mostly effects idle)
Carb's are simple, limited because everything is based on "Jet Size" or in other words a hole which, is fixed therefore depending on what you are tuning for will effect other area's of driving.
Back in the day used to ALWAYS keep an extra plug set in the car! Also, daily driving usually ran 1 step hotter plugs.....Only changed plugs right before a race
to help eliminate the chances of a mis-fire.One thing you probably want to get your hands on is a synchro meter. Will make throttle plate adjustment a breeze.
Good way to start off call someone like Racing Beat up and see what spec's they recommend for your set up. Once you get that you can change the tune based on the type of driving you want to do. The more "race" tune you go with will cost you fuel/drivability.
09-07-11, 12:07 PM
#13
72' Rx2 Turbo
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Oh, yea in case you don't know what a synchro meter looks like (don't know how young you guys are )
I went out into the garage and found this for ya! Took a couple of quick snap shots for ya.
Enjoy!
)I went out into the garage and found this for ya! Took a couple of quick snap shots for ya.
Enjoy!
09-12-11, 09:17 PM
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72' Rx2 Turbo
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09-19-11, 12:13 PM
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72' Rx2 Turbo
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If you really need a tuner, and your in Los Angeles. Check out Jeff McCall at Rotary Power (I think) cant remember his company's name. He's in Gardena CA right off 182nd St & Western Ave (Harvard to be exact). He's super old school and has been doing this for decades.
Good Luck!
Good Luck!
09-21-11, 12:32 PM
#22
That gauge is for the newbies somewhat helpful but without playing with other components it is somewhat useless. No disrespect to jeff but he isnt in my list of local carb tuner. anyone can just pull a racing beat catalog or scca rule book but too slow for street use
09-22-11, 12:17 AM
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Thanks for the compliment Jose. When you coming back to Cali.