Injector size
Cruiser
Joined: Mar 2007
Posts: 111
Likes: 0
From: Wisconsin
In my 106 build I'm running a HPI 55,with Kuryakyn split flow injectors(5.54 flow),Also have BIGBOYZS heads,Redshift 575 cams.114hp-119tq,tq runs flat across from 3000 to 5000,hp crossed tq line at about 5250 and kept climbing to 5500 where we ended the pull.If anyone is interested I have a new set of these injectors for sale,$130 shipped.
Last edited by fastboy2; Jun 13, 2009 at 08:20 AM.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
I'm running stock injectors and throttle body. Dyno'd at 112 and 124 with wrapped big bore baffle. Put the quiet baffle back in and the bike pulls noticably harder. With the big baffle a buddies bike would pull away, quiet baffle he can't catch me anywhere. Maybe I am on the edge with injectors as I will hit 22ms for 1 or 2 frames at WOT but don't feel it. Cracking 50 mpg 2 up cruising and still able to bounce the front wheel going into second.
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Cruiser
Joined: Dec 2007
Posts: 127
Likes: 0
Good point about the dyno LilBudy. When the hp line crosses the torque line it doesn't keep going up and flattening for a short time. The torque and the hp lines both drop around 5200 but the hp drops quickly. There is not the nice steadily increasing hp line. My previous dyno with the same cam on my 103 build shows a hp line that climbs continuously until it crosses the torque line then then both taper down. On this build the damn thing just seems to give up.
I can see how it appears that the engine is not getting enough fuel and that's why we have been trying the larger throttle body.
What happens when valve springs max out?
I can see how it appears that the engine is not getting enough fuel and that's why we have been trying the larger throttle body.
What happens when valve springs max out?
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