Power Vision Information Thread
Stellar HDF Member
Joined: Jun 2007
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Likes: 117
From: Ashby, Ma
Very good info. Nice dyno chart after the FM upgrades. Are you running the stock 50mm TB w/ 4.9 injectors?[EDIT] - scratch that, i see the note in the dyno chart about your SE 50mm TB. What's funny is even with my mild stage1 I see my puny 3.9 injectors hit up to 100% duty cycle on WOT / high Kpa. there is no way they'd support any type of increased performance.
Outstanding HDF Member
Joined: Jun 2014
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From: 90210
The TB that FuelMoto used for my build, with the Level B Heads and the 777 cams is the SE 50mm with 49mm injectors. Jaime said this TB was a good performer for that combo. My guess is that whynotf75's build need a TB that can keep up with the fuel delivery or, maybe he's got a fuel pump or regulator problem like I had. Either way, it should have shown up on the dyno.
I agree- I would vote for the injectors being too small if they are the 3.9's. no way they will supply enough fuel - let alone tune in properly - on a 106 with cams. end of story. more than likely he's hitting high kpa at that rpm range and the injectors were already well beyond their duty cycle limits.
Jamie did you right- the 4.9's with the SE 50mm is perfect. it's one of the items on my build list. I know some guys are going with the HPI 55mm TB and 5.3's on the 107 builds, but that may end up sacrificing some low end TQ for upper HP.
Stellar HDF Member
Joined: Jun 2007
Posts: 2,928
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From: Ashby, Ma
I flashed the custom tune for my mods from DK Customs but it still had lag on the low-end and very minor decel pops. Just ran autotune off the custom tune and big difference...smooth acceleration and downshifting, and got rid of most of the decel pops...now just gurgling.
I have read from some threads that after autotune engine should run cooler 220+. My normal operating temp is around 380 after autotune. Just want to find out if this is normal. What is your normal operating temperature? If not normal, what could cause it to run hot?
Thank you
I have read from some threads that after autotune engine should run cooler 220+. My normal operating temp is around 380 after autotune. Just want to find out if this is normal. What is your normal operating temperature? If not normal, what could cause it to run hot?
Thank you
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
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From: 90210
as a comparative - my Engine Temps (not head temp) are typically 270 in stop / go sitting at lights, and 170-190 riding. this is based on reviewing the log file data for "ET". i think 300 or over would still be way too high for a sporty?
Stellar HDF Member
Joined: Jun 2007
Posts: 2,928
Likes: 117
From: Ashby, Ma
I agree- I would vote for the injectors being too small if they are the 3.9's. no way they will supply enough fuel - let alone tune in properly - on a 106 with cams. end of story. more than likely he's hitting high kpa at that rpm range and the injectors were already well beyond their duty cycle limits.
Jamie did you right- the 4.9's with the SE 50mm is perfect. it's one of the items on my build list. I know some guys are going with the HPI 55mm TB and 5.3's on the 107 builds, but that may end up sacrificing some low end TQ for upper HP.
Jamie did you right- the 4.9's with the SE 50mm is perfect. it's one of the items on my build list. I know some guys are going with the HPI 55mm TB and 5.3's on the 107 builds, but that may end up sacrificing some low end TQ for upper HP.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
exactly- even on my ridiculously over built big dog fxr-style evo I only ride 2500-4500 rpm. it's putting out 120hp/130tq, final drive ratio of 3.76, Baker 6, and it's wicked fun for town riding / day rides. she'll rev to 6500 no problem but I never have a reason to spin it up that far - just the occasional to keep the carb dusted out properly. hah
Stellar HDF Member
Joined: Jun 2007
Posts: 2,928
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From: Ashby, Ma
Really? I was quoting what I see on my 07 FLH so between the newer years and models I suppose there could be quite a difference. I'm pretty surprised you see that low on steady run rate riding but I'm not real familiar with other models/years.
Last edited by oldhippie; Jun 1, 2015 at 02:49 PM.
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Road Warrior
Joined: May 2013
Posts: 1,430
Likes: 55
From: Florida
Never had a Sportster, But I do recall reading somewhere in the PV stuff there's a few different rules for them and they do run a bit hotter. My ET's avg 235* in summertime gridlock traffic. But I have Wards FCS. No oil cooler on the stock 2010 96" so my oil temps get up to 250-270* So I run full synth 20/50 and change it every 2500/3000mi.
Correct, Sportster ET runs considerably higher than the Big Twins due to the way temp is modeled by the ECM between the two bikes.
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Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
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Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com