Hi my project is a 74 mazda repu. I did 3 dyno pull done today and managed a 219.3 rwhp with 190ft lbs @6800rpm on 92pump
The dyno operator reckons i was running to rich and could gain 10hp by pulling 5% fuel.
Now that im home and reviewed the last log @ 6500 my injectors were at 87%dc with a afr of 10.5 boost 3.7 airflow 880 and goes up to 92%dc with afr at 10.78 7960rpm boost 4 925 airflow
im using a aem uego wideband settings in plviewer are 0v=10 4.99v=19.9

My question is do i need to turn the base pressure down or do i need bigger injectors since the duty cycle is above 85% and didn't seem to make any more power bast 6800rpm
also in plviewer im assuming boost is psi
and airflow is what messurement?


Heres my setup

87 S4 Turbo 2 stock ports
new housings
Atkins seals and rebuild kit
low mile jdm plates
stock 550cc injectors rebuilt
rtek 2.1
cx racing turbo manifold
Borg Warner s300 60/76 .91a/r
3" exhaust
45mm Turbosmart hyper gate 7psi spring
50mm Turbosmart bov
intank 340lph Aem fuel pump 3/8 lines to Aem boost reference regulator set at 40psi
front mount intercooler 8"x2.5"x2'

 

My recommendation is to upgrade the injectors. At least 720's in all 4 holes. With the kind of DC's you're logging, there's no safety margin, and no room for growth. As a point of reference, I cracked the 300HP with a similar Rtek 2.x setup using 720's, and my DC's were way lower. Here's a link with more specifics on my setup

https://www.rx7club.com/rtek-forum-1.../#post11712759

 

Thanks for the response.
After looking around for different types of injectors sizes and using this fuel calculator Fuel System Calculator - Wannaspeed
I think im set on getting 4 id1050x injectors "I got to tour their factory last summer truly high quality injectors"
I believe i can meet my goal of 300rwhp with room to grow and theoretically according to paul yaw maintain low idle control .
From what i understand is i can remove the low impedance resistor box and simply make a jumper plug that takes the 12v from ecu to the injectors wires enabling to run high impedence?