Tuning a Monster
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Seasoned HDF Member
Joined: Aug 2008
Posts: 5,080
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From: Ohio
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
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
Road Master
Joined: Feb 2014
Posts: 913
Likes: 5
From: indiana
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
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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Seasoned HDF Member
Joined: Aug 2008
Posts: 5,080
Likes: 2,154
From: Ohio
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
Road Master
Joined: Feb 2014
Posts: 913
Likes: 5
From: indiana
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.
Seasoned HDF Member
Joined: Apr 2013
Posts: 32,851
Likes: 17,887
From: Newcastle, OK
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
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
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Seasoned HDF Member
Joined: Aug 2008
Posts: 5,080
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From: Ohio
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
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
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From: Poolville
Is this what they call the OBAMA Plan.....
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