Do I have to retune my PFC for 1300 secondaries?

I know I have to change the injector duty to 1300.....

Anything else?

 

From owner consensus, you might need to fine tune your fuel a little. XS also told this to a friend.

I'm currently having my 850s punched out to 1200s
by RC. I will be doing the exact same thing when I get them back.

 

Chuck, how much is RC charging you to do this?

thanks,
Rich

 

You will have to fine tune, but you also need to change the Injector Pulse Timing Correction. Here are the values for 1300cc injectors.

FR-PR 100% -0.12
FR-SC 100% +0.16
Rr-Pr 100% -0.12
Rr-Sc 100% +0.16

Hope that helps

Jason

 

Rich,

RC told me $175 per injector with about a 2 week turnaround.

Chuck

 

http://www.rxecret7.com/rcenporin13s.html

Check out this link for $140 per injector.....

Im getting 1300cc injectors on the special...

Jason....Thanks for the info on the injector dutys

 

Those are top feed injectors, you would have to use a new fuel rail if they send the ones in the pic.

 

Hi Chuck,
I should be getting the 1200cc soon, let me know what fine tuning you are doing.
Thanks Colin

 

Jason,

Why do you have to change to timing on the 2 primary injectors if they are staying the same? I can see the reason for the change for the secondaries going to 1300 and is it really that much of a change?

stock 850cc lag time .77
1300cc lag time .93

the difference shown by the +.16msec listed earlier.

Thanks for the info and clarification,

Tim Benton