Wood TW6-6 TW-555 Cam Dyno Test by Fuel Moto

OK, here is a question for the experts

What will I get if I put the 555 cam in my 96 ci bike with only a low restriction air cleaner. I have an IED which brings the mixture up to 14.2:1. It is an 08 bike, so the closed loop system should keep the mixture the same with the better cams.

I am not all that interested in getting the boost in torque at the high end, but would enjoy a mid range increase.

I am anticipating that I will loose some torque/HP at the high end with stock pipes, but the pipes shouldn't have that much of an impact at mid range.
 
OK, here is a question for the experts

What will I get if I put the 555 cam in my 96 ci bike with only a low restriction air cleaner. I have an IED which brings the mixture up to 14.2:1. It is an 08 bike, so the closed loop system should keep the mixture the same with the better cams.

I am not all that interested in getting the boost in torque at the high end, but would enjoy a mid range increase.

I am anticipating that I will loose some torque/HP at the high end with stock pipes, but the pipes shouldn't have that much of an impact at mid range.
 
What you will get by adding a cam without retuning is a whole lot of running issues which can lead to engine damage. The factory ECM's closed loop operation is designed to maintain a stoich 14.6:1 AFR. While it can make minor adjustments for variables such as different fuels, changes in production tolerances, etc.. It is not within its design nor is the factory Delphi ECM in any way capable of making adjustments for performance engine modifications which require fuel delivery/ignition timing far outside the closed loop's very limited window of adjustment. Anywhere outside of the limited close loop area uses the ECM's programming to provide the proper fuel and ignition delivery based on TPS/MAP and other lookup tables and variables. When making modifications of this nature it is required to retune the EFI, there are several excellent products on the market that can do this and this is actually what we specialize in and making these bike run their best.

As far as the IED's they do work as advertised, they slighly richen the closed loop area which can be beneficial when necessary however they are limited to just that, and cannot tune the EFI in any way shape of form.
 
We have all of the cam charts at www.fuelmotousa.com/cams.htm and will continue to post charts there. We will also add a new page on the website with 107" build information/dyno charts in the next several weeks.
 
Thanks Jamie that answered my question about fuel management. What about the stock pips. Am I in any trouble if I retain those?
 
OK Jamie, I finally went to your web site and read all of your explanations on fuel management. I should have done this first as you give a very good explanation.

Thanks for all of the work you have done in helping educate us.
 
Well, keeping it simple.... not much ponit letting more air in (better a/c) if you dont let it out more effectively (better exhaust). Engine needs to breathe better from both ends for getting the most out of your changes - ie a/c, pipes and fuel management should ideally be all done together. Then cams and/or headwork/BB kits etc.
 
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