What TB?

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Mar 5, 2015 | 01:05 PM

#11

XFXDX

Thread Starter

Road Master

Joined: May 2012

Posts: 1,023

Likes: 18

From: OREGON

Quote:

Originally Posted by HD Pilot

Might find a 2001- 2005 HPI 55mm also.

I contacted them to get their opinion... They suggested their 55mm with the 5.3gps injectors. He also suggests that that set-up would net 5-7% increase in power. I would guess it's be closer to 10%.
So... With an engine like this, which is capable of a conservative 115hp/120tq (per their website), and my TB, it looks like I'll be over 100/100 still, which I'm pretty ok with for now... Problem is, I'll be running the snot outta my injectors. IS that really a problem?

Mar 5, 2015 | 05:13 PM

#12

target64

Stellar HDF Member

Joined: Jan 2013

Posts: 2,464

Likes: 50

From: Rouses Point, N.Y.

Quote:

Originally Posted by XFXDX

HPi told me the same thing 5.3 injectors, after talking with art and there tuner at R&R cycles out of new Hampshire & dan thayer my tuner they recommended the 4.9 injectors said they would support 130 hp with out any issues. going too big on the injectors some time causes tunning issues I was told! your bike I believe came with the 4.2 injectors and that will support your build. like vdrop stated that kuryaykn 57mm is a great deal. but its only money they make it every day! the HPI is a Nice unit. my duty cycle was under 80% so there was no need to go to the 5.3's which I brought with me just in case I needed them.