Ive been wanting to get to a dyno, but havent had a chance due to crappy job, (just got a new, GOOD job today) and am wondeirng how much HP i might have. I know there has been alot of these kind of threads, but whatever.
Anyways my current mods are
-"Stage 2" streetport (which im guessing is midsized)
-Full freelow exhaust
-Semi cold air bonez intake with custom piping, thats actually straight and smooth
-Removed ps/ac, etc
-Port matched all intake manifolds (even dynamic chamber)
-Removed 6pi system
-"Ported" my TB, and removed secondary plates.
-Un tuned SAFC
I suspect that I will reach 165ish with those mods. Maybe break 170rwhp after i upgrade my ignition and tune the SAFC2 correctly.
Thoughts?
btw, this is an NA for people who dont know me

After i drive my car, then drive my moms '03 neon, the neon seems painfully weak

 

it all depends on the level of porting... and if you would tune it, it would prob'ly make a big difference too... but u know that already

 

Werd, im going to tune the safc, i cant wait to see the AFR numbers, im so curious.

 

155, after the S-AFC is tuned.

 

Sounds about right but it depends on the type of dyno.

also expect to see your AFR's hit in the 15s-16s above 6500 RPM. Save yourself some time and get a TII fuel pump before you hit the dyno.

 

I'd say around 165-170 or so since you already have a street port. After you get the AFC done you'll most likely get more than that. Altogether depending on how aggresive the tune is I'd say 175-180. Good luck

Kiyo

 

Hey Sonic, you did notice that this is a ported motor right? 155 is an awefully low number for a ported motor don't you think?

 

im geussing 170-175 after its tuned if your port is "mild". too bad you dont live around me. theres a local shop here that has dyno days were you get three pulls for $30

 

Are you serious that ill be seeing 15/16 on the afr? thats really lean, why do you say that? Am I going to detonate?

 

Russ - About your sig - It's not a money pit until you hit $10K..

 

No, you should be good for now.

 

im going to be higher than 150ish im sure..

 

9 out of 10 NA's will never need a higher flowing fuel pump and I doubt he's running lean at all. From what I understand, the NA ECU runs very rich and he will see gains in leaning out the midrange and top end with a fuel controller.

 

Bravo! Finally someone with a clue tells the truth!

 

Truth? Please... The truth is that you won't know your AFR number until you get on the dyno.

The statement about 9 out of 10 NA's running rich is speculation at best.

For more info go to http://rx7.com/cgi-local/2ndgencalc.cgi and put in the stock 460 injectors. What FLYWHEEL HP number does the calculator get? (~152HP if your to lazy to look) The "truth" is that once you start hitting over 165 RWHP on the dyno, the 460 injectors start to run out. You will see AF number in the high 15's-16's especially on the S5 cars at 8000 RPM.

I've been on the dyno several times and each time I needed more fuel. If Dezerte already has a S-AFC, he can easily add a TII pump and take fuel out on the dyno. You'll be pissed off though when you get on the dyno and need more fuel and don't have it available. The S-AFC is worthless for adding fuel.

 

Reasons why your 2nd gen can run lean on the dyno:
1) 13-18 year old wiring, sensors and electrical components
2) Original injectors being dirty/sticking
3) Original fuel pump not putting out like it used to! (hehe)
etc...etc...etc...

I'm just trying to give a little advice. It totally sucks when your paying $70-100 bucks an hour to have your car tuned and then have a fuel problem keep you from reaching your cars full potential. Ask me how I know...

The point I'm trying to make is that unless you've replaced and verrified every component of your fuel system, you'll have no idea how its performing until you start measuring AFRs with a wideband. Forget everything you've heard about "NA's having more than enough fuel". This blanket statement goesright out the window as soon as you start porting and modifying the engine.

 

Stock injectors, stock fuel pump. with s-afc at -10% and up starting at 6krpm. (This is RarestRX's dyno graph) 160hp. Closest to 'proof' the forum as to offer at the moment. Looks like he's in the 12's there WITH correction at 160. Hmmm.. go figure. On another note, Dan Atkins claims to have hit 176rwhp on his SC'd FC with stock injectors/pump on the dyno. (also says this on http://www.camdensupercharges.com).

 

What exhaust is RarestRX running now? I know he's in CA, is there a cat on his car? The very edge of his graph does start to support my claim: The HP starts to trail off at 8000 RPM as the AFR starts to creep up. It doesn't look like much but his dyno graph resolution is is real crappy... I hate when they cruch down the numbers into a 2" tall graph.

Anyway, we all know that RarestRX's GTUs is a pristine example with low miles and meticulously maintained. How many other cars out there are in this condition?

Also take into consideration that this chart is from a Dynojet. IE: Known to give higher HP numbers.

 

hey russ can you pm me the loc of that dyno and some info? lancaster is not THAT far from me Thanks


Mage

O I say 160hp.

 

here are his S-AFC settings. I'm sure -20% had something to do with the climbing at the end.

6200....-4
6400....-6
6600....-8
7000....-10
7200....-12
7400....-14
7600....-16
8000....-18
8200....-20
8400....-21

 

That's cool...For RarestRX. It works in his car.

for more useless information here are my S-AFC settings:

1000...0
2000...+1
3000...+3
4000...-5 (I have 550 seconary injectors)
5000...-3
6000...+1
7000...+4
8000...+8

Does this prove anything? No, it just means that my 86 (S5 engine) needed more fuel that RarestRX. I found out that my car need more fuel on the dyno. Will Dezerte need more fuel? He won't know till he hits the dyno.

BTW: RarestRX is running a STOCK BLOCK correct? My 86 is a Street Port.

 

Mine is in this condition. 10kmi on freshly rebuilt, ported engine, i maintain my car well, as well.

 

As do I... However how new are your injectors? What about the fuel pump? Or did you just resue your old ones when you rebuilt the engine?

 

Jeez, you guys are too touchy. I'm not out to start a pissing contest, I'm just throwin proof out there that in most cases, the n/a pumps are good enough for the n/a's. My key, is anything under 210fwhp is good enough on the stock injectors/pump. You seem to have opposite experience, we both shared proofs for each. So we leave it at that. We're both right, and both wrong at times too. Now no more fightin!

 

how does this support your claim? at about 7950rpm, there's a tad bit of a dip, but the air/fuel is still at ~13:1. so as it leaned out (still in the safe zone), wouldn't it make power, not cause a negative dip?
and while we're on this graph, is there an ideal air/fuel for efi non-turbos or certain ideal a/f at different rpm?