I'm no expert myself.I'll begin by saying that ive searched far and wide for this info.
The bike is an s2r bored to 1078 hi comp with tpo beast r kit currently installed. With a power commander, it never felt like it was running optimally, so I switched to microtec only because I got an insane deal.
I ended up with an extra set of injectors from an 848 evo (12 hole iwp189) that I am very curious about trying. I have a feeling that the high flow would make it it would run too rich with not enough atomization with the injectors routed under the butterflies. This is just a theory and please feel free to correct me if im wrong. I know a remapping will be necessary either way.
I have the system apart and am thinking about going to 50 mm throttle bodies (using 2 748/996 horizontal throttle bodies).
I plan on porting the heads and going +1 on the valves at some point, but would the 50mm be overkill before doing that work?
I was thinking about chopping the top of my k&n filters and making a carbon fiber mount/filter cap so the injectors can be mounted directly to the filters (at least before I go to 50 mm throttle bodies), but don't really want to chop up the kit.
This also led me down the road of straightening the intake tracts, so any info on that would be greatly appreciated.
I know, a pretty scattered post, but I have been constantly researching and learning and don't have a complete grasp on the engineering, so I figure i'd reach out to the experts.
50mm throttle bodies (unracked with a throttle cable running from each)?
Shower injection with straightened intake tract?
iwp189 in oem injector holes?
I'm upgrading to a higher flow fuel pump and am considering changing out the stock fuel pressure regulator for one with slightly higher pressure, maybe 3.5 BAR (only because I have the assembly apart to switch to a ca cycleworks tank). I read a post where someone where either Brad B or Chris K mentioned modifying the stock regulator to bump the pressure up, but it only said to take a hammer to it, giving less room for the spring to move. I feel like this is easy to mess up though.
I know I'm making a lot of changes at once, but since I had the bike apart and welt down the rabbit hole of fueling and injection, I cant seem to stop thinking about it until I find definitive answers.
Any help would be greatly appreciated!
Also to note, if I go to shower injection, I will either use an 848 airbox chopped up to fit everything or make a huge carbon fiber one with sbk style ram intakes, which will seal any extra fuel from getting everywhere.
Long winded and scattered are my main attributes these days, but any advice/help/info would be greatly appreciated!
Thanks in advance!
This is the set-up for my 1100SS .
999 TBs on a Hyper engine with downdraught ports.
IWP 189s are below the butterflies on the S4RS and seem to work fine.
If you design carefully the cable actuation, you should have no issues - I don't.
Marelli internals, in a home made shell for the pressure regulator.