I'm to choose injectors for my roadrace and street Integra type r.
Set up is as follow:
Honda B18C type r block, stock bore and stroke,
11.8:1 compression;
Alaniz ported Integra type r manifold with Mugen intake;
Alaniz competition p&p b16a head and 3 angle valve job;
stock Integra type r fuel rail and fuel pump;
Hytech custom 4-2-1 header with anti reversion chambers and 2.5 exhaust;
Skunk2 stage 2 cams;
Hondata s200 tuning with max rpm at 9500.

Crank hp is estimated to be in the 260-265 ball park.

I'm considering two options:
1/ S2000 pintle type injectors (360 cc. at 42.5 psi) having a like stock spray pattern with fine atomisation, very good running on partial throttle, nice gas consumption but normal on performance wise in the high rpm;

2/ RC 440 disk type with a spray pattern that let's a bit to desire beeing a laser narrow beam and not the fan shaped dispersed mist like pattern that you see on the S2000 pintle nozzles. The throttle response and idle quality might suffer with the laser beam spray pattern and should come a rough engine but with better performance at high rpm.


So it's really a matter of what strategy to use to get my needed fuel rate with the two injectors type:
using the S2000 injectors and push the FP and duty cicle (Hondas seem to like high fuel pressure and duty cicle) to stock integra type r rates (around 55 psi and 80%) getting a better spray pattern hopefully without pulse fluctuations and strain on the system

OR

using the overated RC 440 cc. and play with pressure and duty cicle to lean down to my needed fuel injector flow rate and have some reserve and be easier on fuel system but with a worse spray pattern.

With RC injectors is also critical aiming the injectors to spray on the back of the intake valve, because i was told that the RC's spray won't hit the back of the valve but the port divider.
With the s2000 fan-style spray pattern aiming the injectors doesn't care.

I haven't considered RC injectors smaller then 440 cc. because i was told that the larger injectors of 440cc's and above from RC have a 2 laser straight spray pattern providing a better spray pattern with narrow conicle angle.

But i could be wrong.

I'm also in doubt if i need to upgrade my stock fuel rail and fuel pump.

 

UP

 

Pick an injector that is large enough for your application & call it a day.

 

360 might be cutting it, but a 440 will be more than enough for an allmotor application, no clue on the spray pattern **** though.


but if you have the s2k injectors handly, i'd slap them in and go dyno it, see what duty cycle your pushing up top, if its in the 80s i would just leave them be. u can alwasy bump the pressure up a bit to make up for smaller injectors. but dont go crazy with the pressure, u'll mess up the spray pattern. I wouldn't go past like 45-47psi.

 

Eddiebx,

using RC injector calculator with a power goal for my set up of 215whp (around 260 crank hp) i have to run the S2000 360 cc. injectors at 50 psi of pressure to keep duty cicle at 80%.
With the RC 440 injectors for the same power goal duty cicle is at 70% with a 43-44 psi fuel pressure.

Which one would you choose?