Current Build
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Intermediate
Joined: Nov 2020
Posts: 31
Likes: 26
From: idaho
Current Build
Currently building my 2018 Fat Boy here's what I have going on
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
Just curious. What did FM say when you asked them? Not trying to be rude, but I would ask the experts that do the work and make the products if it were me. Jamie and those guys are very straight up and will be more than willing to give you good honest advice.
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
They monitor here some, but I'd call or email them if I were you. They're good about answering calls and emails. I bought quite a few things from them over the last few years and they always answer my questions quickly. They'll tell you if you're making a mistake buying one product versus another and make suggestions to suit your needs.
Road Master
Joined: Apr 2014
Posts: 1,023
Likes: 379
From: Philly Burbs
Currently building my 2018 Fat Boy here's what I have going on
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
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Supporter
Joined: Jun 2014
Posts: 413
Likes: 448
From: Montana
I would consider the S&S Roller Rockers too
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Road Master
Joined: Oct 2008
Posts: 842
Likes: 284
From: UK
Currently building my 2018 Fat Boy here's what I have going on
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
sawicki speed pipe
S&S 128 power kit with cam plate and oil pump
fueling 592 reaper cam
stock heads and throttle body
power vision target tune
my question is how much of a benefit would I see in adding the fuel moto B heads and the HPI throttle body and intake and if I do add it what size throttle body should I go with, is this something that I could add down the road or am I going to hurt something without doing it now?
I done some research as doing a Fatboy build , iirc S&S kit pistons (need ring gaps setting) even tho flat top have large valve cut outs -7.5cc & cyl need to be zero decked, stock heads 89-90cc
there are now 128" dome pistons available to avoid big head skim, the new gen 2 SE heads (work well) but iirc 92cc chambers, big tb/manifold hpi 62 or SE64 still needs good shop to pull it all together & tune it
tricky on a softail is pipe selection to support it all
kinda costly on that cam selection
Road Master
Joined: Mar 2017
Posts: 894
Likes: 224
From: Lynden, WA
Too much cam , you need valve springs for the 592 cam, So you might as well get FM Heads, or put an SnS 475 Cam in it with the Stock springs. If you're dead set on a bigger cam like that but want to use stock heads I l would go with the woods 408 or see if you can exchange that 592 for a 521. They work well with big bores and stock heads. I know two guys with 128s and one did the 408 one did 521, both work great. 521 cam sounds a little more aggressive to me.