rudebwoy

Is it normal for 1600cc injectors to require richer AFR's in order to idle smoother? I was out with my boy today tuning my car and we could not get these injectors to idle right while at 14.5/14.7 AFR best idle was acheived at 11.5 AFR, and while cruising also rich was also better. very rough idle, part throttle was a pain in the *** and we ran out of time, so we got to try again next weekend.

any tuning tips for running these injectors?

please don't ask me stupid questions like why do I need injectors this big. (power goal and intentions in build thread)

SOHCKLR657

Usually the motor needs a little more fuel to idle, you could also drop the fuel pressure a little bit and tune from there

camsshaft

what is the pressure set at? play with that a little. Also return line size might have a play in it too?

rudebwoy

I have dual walbro intank pumps. 8AN feed line and 6AN return my fuel pressure is at 43psi idle, last time I tried to mess with my fuel pressure it was not making any changes, was at about 60psi idle. I think something is wrong with the gauge so I ordered a new one. at one point we tried to tune part throttle and we just keep adding fuel.

my boy had to leave and I did some tune runs on my own on the autobahn, initially my AFR's 15 at 13 psi I richen up the entire boost cels and got it to 11.5 AFR. but with these injectors its very hard to tune part throttle. I need to find a dyno so I can pay mre attention to these areas.

rudebwoy

when I had the 1000cc in everything was a lot cleaner and easier to use. but then again we are 600cc more.
maybe its the brand injectors. RC seems like a more refined injector

camsshaft

precisions all the way!!!! I've had both brands and I'm more impressed with all of the set ups I've seen with precision.

mikealike

precision do really good in tuning small c i motors.

fasterthanueg

1600's are like turning a garden hose on and off. the cars that run 2 sets of 16's actually run smoother.

rudebwoy

2 sets of 16's wouldn't that make it flood even more?

BuGS

RC is the way I roll! But keep it up, I have seen mean setups running 1600cc injectors and having a fine idle not running too rich, maybe like 13:1 or something if I remember