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Tuning a Monster

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Old Aug 5, 2014 | 01:51 AM
  #11  
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Originally Posted by D_gyver
this is what my setup is after 12 pulls on the dyno today intermediate jet is .034 main is .072 air bleed is .074 and t-jet is 130 afr at idle 12.5 off idle it leans out to 13.3 and holds until 4500rpm the drops to 12.6 and at 5000rpm leans back out to 13.6 max HP at 5400 113.5 max TQ at 3400 98 this ultima carb is doing a good job of feeding my 80" build
Nice numbers for the 80" your tuner has it nailed, I like the lean out at high rpms for power just scared with the big engine to do that. You can see when the T jet comes in

Just ordered a 036 intermediate and I'm afraid it is going to end up with next size of 040 which is a gas guzzler, lets see what the 036 does but I fumbled the intermittent jet set up
 
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Old Aug 5, 2014 | 05:22 PM
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Originally Posted by 1997bagger
Nice numbers for the 80" your tuner has it nailed, I like the lean out at high rpms for power just scared with the big engine to do that. You can see when the T jet comes in

Just ordered a 036 intermediate and I'm afraid it is going to end up with next size of 040 which is a gas guzzler, lets see what the 036 does but I fumbled the intermittent jet set up


my tuner lol... it was me on my buddies dyno if he would have been there it probably would have been done in a hour. it took me almost 5 hours and a lot of cussing. but I think ive got it close enough now. when I showed him the printouts and told him how long it took. he just laughed at me
 
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Old Aug 6, 2014 | 12:48 AM
  #13  
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Originally Posted by D_gyver
my tuner lol... it was me on my buddies dyno if he would have been there it probably would have been done in a hour. it took me almost 5 hours and a lot of cussing. but I think ive got it close enough now. when I showed him the printouts and told him how long it took. he just laughed at me
You need to look for a new tuner, wouldn't be able to afford this one if he charged by the hour, did you wear your carb screws out or just started putting a wire tie around the carb?
 
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Old Aug 6, 2014 | 10:40 AM
  #14  
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Originally Posted by 1997bagger
You need to look for a new tuner, wouldn't be able to afford this one if he charged by the hour, did you wear your carb screws out or just started putting a wire tie around the carb?


I bought the thumb screw kit. the only thing that gave me a fit was the air bleed. getting the timing on the main jet was a PITA. it still overlaps the T-jet but just a little now.
 
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Old Aug 6, 2014 | 11:18 AM
  #15  
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Originally Posted by 1997bagger
Been riding the White Bike this summer with the 127 and my god is it fun on a open road but learned that 140-150 horsepower is a heat creating machine and know how the Twinkie guys feel with new bikes in the EPA meeting range.

Tuned 80-110 horsepower engines with numbers by the book that create a perfect running engine with no hiccups in any areas BUT NO try that with this engine and you have enough heat to cook popcorn and hiccups from hell and just shut off at a stop sign, head scratching attention is needed with this monster.

On a AFR reader normal engines idle and run in the 13.8 range, this engine will just plain shut off at a 1000-1100 rpm idle or spit out carb in a 13.8 range, had to turn the (Ultima/S&S) air mixture screw out into a rich 12.8 range which took care of that problem. Low to mid RPM range is set at 13.6 which runs fine but will build alot of heat running thru towns in with stop lights, I already have the biggest low speed jet with the kit in and currently installing a bigger low speed jet to cool this baby down but kissing fuel mileage good bye that wasn't bad riding normal but will pay the gas to save a engine.

Conclusion is get it close with a AFR reader and then go back to the old school of adjusting by feel that works for the application so never forget the old ways in a modern world, you might need them.

Oh, by the way, did I say how much fun eye watering HP is
Get a set of Jason`s fans.
 
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Old Aug 7, 2014 | 12:47 AM
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Thanks for the product but I believe if I give the engine what it wants with fuel the heat will come down, I will know this weekend.
 
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Old Aug 7, 2014 | 12:50 AM
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Originally Posted by D_gyver
I bought the thumb screw kit. the only thing that gave me a fit was the air bleed. getting the timing on the main jet was a PITA. it still overlaps the T-jet but just a little now.
Ya, can see where the air bleed could screw with you, left my air bleed where John Sachs set it up with the T jet and throat bore
 
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Old Aug 7, 2014 | 05:12 PM
  #18  
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Originally Posted by johnjzjz
you know that carb has a mix change jet for the low hi mix and you found out new tech does not work with old school hot rod power
Is this what they call the OBAMA Plan.....
 
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