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Dyno ChartsThis forum is for posting of your Dyno Charts. You will use a prefix to designate your Cubic Inches. When posting please include all model year, Cubic Inch and modifications in the thread title and in the body when posting your Dyno Charts.
The build is a 98 Fatboy,
I was able to get my latest build upstate to tune it on the Dyno.
96" Evo. Hillside stage III heads
Woods Exp cam
S&S 4 5/8 crank
Axtell 30* 3.645" angle tops
RB Lsr pipe
Dyna 2ki
The gold is the base run. With some tuning we were able to get it up a little but it turns out the pipe is holding it back in the bottom end. Swapped out the pipe to an old E pipe and we picked up quite a bit. The black line is where we finished 111tq/ 107.5hp... The drop off at 5100 rpm is the experimental Cam I had ground. Works great on bottom and carries a nice flat top but falls off at the top... We finished with "ok the cam is coming out and will be replaced as well as the pipes. Going with a Supertrapp.... Will have to adjust the combustion chamber to match the new Cam. It will be completed by the end of the month. At that point I will post an update.....
Picked up my bike Thursday and am very happy with the results. I was expecting a little more but then again I always am.... Just did a round-trip to Rhinebeck 250 miles and the bike pulls the hills on RT 28 through the Catskills no problem in 6th gear. I changed my gear ratio to a 3.20:1 and still have to refill the tank to get a good idea on mpg. I think I'm right around 40 mpg. Bike is very responsive and quick. Here's the Dyno sheet.... Still have a little problem above 5k. Scott and I believe it to be a problem with the carb... Everything else has been ruled out.. So I might be going to a G carb.. Possibly will be doing some more tuning on the Dyno. Scott has a G setup he wants to try before I spend... So more to come.. I still believe there is more in this build but won't know till testing.... Till then I pleased and am enjoying the ride... I have not got on it to hard from the hole yet so I can't say how it pulls for 1st, 2nd and third at wide open throttle...
115tq/109hp... Feels like it too...
Last edited by 98hotrodfatboy; Jul 1, 2017 at 11:05 AM.
looks good and has to be fun to ride ...!!!...if i may suggest ...drop the air jet down a few , bringing in the fuel (main jet) a little earlier , may help with the dip...then add it back with the thunder jet on the top ...otherwise ....bet it a blast to ride !!
Thanx, it really is a lot of fun... This spring it'll be going back up to Scott for a G carb. And a comparison of the W8 cam and my experimental cam.... Can't wait but I have no choice at this point...
I'm sure your 98"er is right up there. He does do very good work... I was once disappointed with a build I had him do but I think it was more in my head and not in the work... I was expecting 100/100 out of an 83" Evo build and it fell short by the on each. I ended up putting myself through hell and back trying to find that 3 hp/tq. Ended up shearing my crank pin, so at that point I decided, new crank? Ok a stroker and never looked back. Still making a few mods to it but it will definitely be completed this spring..
I'd like to see the afr trace just for giggles,,,,the G with the Tjet can do a lot,,,96 inch is the boarder for the e and g,,,,curious if it loses any on the bottom and what i gets up top,,,but would like to see the afr on the runs and your altitude.
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Not sure if Scott has a sniffer. Never seen him use one... But I'll ask.... I will be a doing a before and after dyno run to see the actual difference between the E n G carbs...
This last couple of months I was able to repair my heads (unknown how the valves bent) So at this time I was also able to replace the S&S E with a G. Both have ThunderJets. I also took out my experimental cam that was used in the last tune/dyno sheet that came in nice with 114/109, with a W8. I always thought that the carb (the E) was holding me back at around 5k. turned out not to be true. I'pretty much where I was with a slight shift to the right with the W8. I was expecting more but I guess not... Little disappointed, went down one in the tq and up 1.5 in the hp... but whatcha gonna do... Still A good runner for a 96" Evo.... And now the end... This will be it for this motor... Time to Enjoy.....
Last edited by 98hotrodfatboy; Jun 2, 2018 at 07:36 AM.
Did a turn around up to Munnsville to pick up my bike.. Got home around 4:30 but didn't get to ride it because of rain rain rain.... Bummer.... So hopefully I'll get it out tomorrow to get a good feel of that torque....
Glad I was able to chat with Scott in person. Wish I could have stayed up there a little longer... Thanks Scott....
Last edited by 98hotrodfatboy; Jun 5, 2018 at 08:35 PM.
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Sweet EVO power !!
