power fc and sr20det

[ka-t]

Having a problem with throttle response on a s13 sr in a s14
when i snap the throttle it almost dies and goes lean then picks right back up. anyhting i should look for?
if i make a medium gradual idle to 3/4 throttle all is fine. just having a problem with idle to quick rev and almost stalling.
I'll get a vid tomorrow if ya dont get what im saying.

I messd with injector lag times going both positive and negative and neither helped this issue.

sr20det
740cc tomei injectors
bc stg 2 cams (264/264)
9.1 comp (rods and pistons)
Using a power fc from a black top on my redtop and not using an 02 sensor

[jspaeth]

Having a problem with throttle response on a s13 sr in a s14
when i snap the throttle it almost dies and goes lean then picks right back up. anyhting i should look for?
if i make a medium gradual idle to 3/4 throttle all is fine. just having a problem with idle to quick rev and almost stalling.
I'll get a vid tomorrow if ya dont get what im saying.

I messd with injector lag times going both positive and negative and neither helped this issue.

sr20det
740cc tomei injectors
bc stg 2 cams (264/264)
9.1 comp (rods and pistons)
Using a power fc from a black top on my redtop and not using an 02 sensor

this could be related to the acceleration enrichment.

basically, the PFC detects how rapidly the throttle plate is moving (either closing OR opening), and the faster that it opens/closes, the more additional fuel it adds.

Under the accel menu under settings, there are a few different options.

There are different RPMs (so that you can have different corrections for different RPMs).

one number says how many extra milliseconds of injector pulse width to add, and the other number says for how many milliseconds to include this extra pulse width.

Basically, if you are leaning out when you jab the throttle, increase these values, and if you are too rich, decrease them.

Be careful, sometimes you register lean when things get so rich that you get misfires.

I would suggest setting them to 0 first and then increasing them until the car runs smoothly.

On my car, with similar cams and turbo, I can put them at 0 and not feel much of a difference....

They are helpful for when you are at 5K RPM and under vacuum and then you rapidly floor it and the manifold pressure increases very rapidly relative to the rate at which the RPMs start going up....prevents you from leaning out.

[ka-t]

Awesome man thanks, ill look into it