Injector sizing info from Accel

[John_D.]

<blockquote>quote:</font><hr>Originally posted by Magnus:
John, your MAF readings fluctuate because of the PORTED TB... your MAF just kinda hangs there now.. its in a completely different environment than what it was designed for..

You need to either go back to a stock TB or use a 99+ MAF sensor.<hr></blockquote>

I think you're partly right.

The readings are not exactly accurate when na, but they do always climb steadily.

When spraying, they go all over the place.

I probably will put a 99 sensor in it.

[ June 27, 2002: Message edited by: John_D. ]</p>

[John_D.]

<blockquote>quote:</font><hr>Originally posted by pgriffith:
your going to spray after the MAF with your Nos dry kit?<hr></blockquote>

Going to try it.

At first I thought I would get more (and better) fuel enrichment by spraying before, since it would cool the wires even more, making it look like more air was flowing.

I'm finding that most of the enrichment comes from the fuel pressure bump that I get when the nitrous hits the regulator. Not from the maf readings changing.

I'm already having to set the wot setting higher on the maft when spraying than when not, so if that is going to be the case even with the nozzle before the maf sensor, then I can still do that after moving the nozzle and not be any worse off.

The biggest problem is the wild up and down readings that I'm getting now, there's no way to hold a decent a/f ratio.

[Magnus]

John.. STOP SPRAYING NITROUS RIGHT NOW!!!!

If you continue, you pose a HUGE SEVERE RISK of damaging your motor.

Fix it first NA before you decide to put nitrous through the car. Also, do NOT spray after the maf sensor.

With a dry shot spray far infront of the sensor as possible. If you spray directly at it you will freeze the sensor and it will be useless.. If you spray after the sensor it won't pick up the added air going in and won't increase pulse width.

If you spray far infront of it enough, it will mix with the normal outside air and your MAF sensor will read correctly and adjust accordingly.

[John_D.]

ummm, how do you really feel about this... [img]graemlins/rofl.gif[/img]

Ok, I get the hint. [img]smile.gif[/img]

And I was planning to race it Saturday night.

The nozzle is mounted in the top of the silencer, and the only thing you can see from there (an inside view) is the bottom of the tb, so I should be ok, as far as not spraying the wires directly.

Not sure how much further upstream I can take the nozzle, unless I put it in the filter lid?

I think I have the na worked out ok for now, by setting the maft a little rich.

[Magnus]

DEFINATELY from the lid. [img]smile.gif[/img]