| Matt: Yes from what i have read is that the best angle for injectors is more or less 68* longitudinal with the airflow. The total length for a p-port runner should be between 21 and 28 inch i believe. (13 B) My guess is that the “sweet spot” for placing the injectors would be around 10 inch from the rotary face.The fuel injection pressure and injector size also matters. The better the pressure round 43.5 psi the optimum droplet size for specific injectors and the nearest to its design flo rate.
The billet speed injector weld on “bungs” should work fine.And flexible high pressure injector fuel line can be use and simplify the prescision mounting of fuel rails.
Maybe Lynn H. must answer us here as from his racing experience and engine building. As he also says “ i could be wrong “
Regards Le Roux
Sent from my iPhone Le Roux Breytenbach On 20 Apr 2021, at 17:16, Matt Boiteau mattboiteau@gmail.com <flyrotary@lancaironline.net> wrote:
I painfully struggled with the aluminum blocks that Paul designed for the P-port tubes. Buying the drill bit for the top, the fuel log rail, drilling them to match, then trying to get them to mate / lock down without spilling fuel everywhere. (Plus the welders hourly rate). Spent easily over $600 :( My next intake will definitely use something like billet speed. Let me know how it goes. I know nothing about this, but do you want the injectors at the start of the intake runners, to give it a long time to mix with the air? Since we aren't looking for quick acceleration (injectors closer to combustion) and more long term cruising MPG benefits. Has purchase these injector holder brackets, to weld on the 2 intake runners (P-Port runners) 2 injectors per intake
What i have read online ( RX 8 clubs) is that correct angle for injectors on the intake runners is between 45-68 degree's. with the velocity airflow.
Any comments and tips for welding on these (boss bung) brackets for best performance?
Le Roux
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