And I would argue that it is directly related. More air + fuel = more power. But maybe this is subject for another thread.

Curtis
'86 GXL autox'r

 

Pd day, I've also found that my 6 ports don't open when I'm sitting still, but they do work.

This is a good thread. Nice to see some #'s. What type of WB O2 sensors are you guys using? I like the greddy setup on RX7.com.

 

Without tuning I now see 52.7% in third gear to 7500rpms. Ok I dont know what this means but Im proud of my airflow. Hehe. Im going to get it dynoes next week if I can find some dam headers.

 

Ok, I am raising this tread from the dead again

Previously with my:
Cone intake
RB turbo back with custom downpipe
CAI
SAFC
I saw 55.9% as my max afl.

I installed my pineapple sleeves yesterday and I saw 58.5% AFL.
The thing is, I saw 58.5% @ 7100 RPM whereas I saw the 55.9% @ 7600RPM.

Weird eh? Anyone care to explain this?

Anyways, back on topic.
I am probably going to dyno tune my car in the coming week.
I'll let everyone know how much power my little NA makes.

Cheers

 

What gear do you guys get that much airflow? I only get about 43% at 7500 RPM in 1st gear. Haven't tried 2nd and 3rd gear yet.

 

Its nearly the same in every gear. First gear is around 50 but sometimes 52 and third gear is the same. Try doing it in a higher gear like third , mabey you will get a little more. And make sure you red line it on your stock tack. That comes out to 7.6k rpms for me according to S-AFC

 

pd day///Where did you get your FC dyno tuned? Do you think you will be able to be beat me this time?

 

??? You two raced already?

 

PDday. Mabey your losing power at higher rpms hence the drop in airflow. But I dont know. Your a/f seem really high for the amount of mods your have. You should get it dynoed and let us now how it reads on that. You dont have headers?

 

Kouc, that is what about my car runs when my vdi is in the low position. Might want to check it out.

Pd, sounds like your making more hp up top for shure. But can't explain the drop. Next time I take out my 2nd gen, I'll check to see if mine drops or what. CJ

 

Here is something I rigged up...

Airflow vs. rpm for pineapple sleeves vs stock sleeves.



Notice how the increase is very noticible after 4600rpm

 

How much hp are you guys picking up with the SAFC and in what rpm range??

 

How do you check if you VDI is working? Mine was moving fine by hand but is there anyway to make sure?
thanks

 

I got my high end hesitation FIXED!!!
Haha, apparently it was running too rich in the high end.
My new setting is the following...

1000(0)
2000(-3)
3000(-9)
4000(-13)
5000(-13)
6000(-12)
7000(-14)
8000(-13)

And get this......I broke into 60.3% AFL.....hehe

BTW, I don't have header, just a 2.5inch downpipe to RB turbo back from the stock manifold.

 

Hmm, I an think of 3 ways.

1) If it works, you should get a kick when you are at 5500 - 5800 rpm and pull hard to around 7000ish rpm

2) Just rev the car and see if it moves. Mine moves when I rev it in neutral.

3) To test if the actuator is actuating, bypass the solenoid on the solenoid rack. ( I think it's the top 2nd one). Rev the car, it should open up pretty early in the rpm range.

If any of the above 3 test don't work, you can deduce the problem from the other 2.

Hope it helps.
Cheers..

 

I forgot you mentioned In a previous post you have an upgraded Fuel Pump. I too have one too (yet to be Installed) and will probably see drastic number deduction aswell.

 

okay, i got 57.3% afl at 7670 rpm. what does this mean?

 

I'm running a T2 fuel pump, but according to many people on this forum, does'nt change base fuel pressure. CJ

 

I've noticed something....
The AFL reading changes drasticly with the weather.
As the weather gets cooler, my AFL drops...
As the weather gets damp or humid, my AFL drops.

I also find the car runs richer with colder weather.
Is this happening to you guys too?

 

Yes. Mid day I got 52.8 and at night Im getting constant 50.7s. I thought something was wrong with my car at first. Good point PDay. I guess if it runs richer than its losing power according to some people but I dont think that the A/F ratio specifically has as much to do with the power the vehicle makes as what poeple think. But its pretty close. whatever I dotn know.

 

The air flow meter, does'nt have as much to do with the power as the a/f ratio does. If you're running a 10-1 a/f ratio on a n/a, it realy, realy hurts power. The reason I say this is because, when I dyno'd my car I was only seeing around 53.8%(There are lots of people who are running 53%, but not many putting down 167rwhp)....now I'm seeing upto 60%. I made 167rwhp@53%. There is no way I'm making much more than 10rwhp more now. (If that!) and the air flow meter has seen a jump of nearly 7%. I don't think the two are that closely related. CJ

 

Yeah, my af readings depend apon the weather. If its 100+ degress out, and my car is heat soaked my readings have been as low as 49% at the drag strip! CJ

 

pp13bnos. Oops typo. I mean A/F % doesent have to do as much as what people think. U helped prove my point thnx.

 

It's around -20 C rite now and I found my car a bit sluggish so I retuned my SAFC.

New readings are

...............................adjustment
RPM.......................High............Low
1000......................0................-5
2000.....................-3................-7
3000....................-14.............-10
4000....................-16.............-10
5000....................-17................0
6000....................-18................0
7000....................-19................0
7500....................-18................0

btw, before I re-adjust the safc, I wasn't running as lean in the high revs. Maybe around 2 to 3 points richer. What I noticed is that with the leaner settings, the pops from the shifts are not as loud....

Anyone can comment on that?

Thanks

 

the pops from the shifts come from the enrichened exhaust gasses, so if you have less gas in your exhaust, youll make less flames