I had the opportunity to dyno my car this weekend and wanted to share my numbers:

And thank you to the guys at ATP in Fremont for letting a late-comer crash their festivities

My first and second run was at 13-14 psi, the last at 14-15 psi.

My mods are:

HKS Intake
HKS Dowpipe
HKS Cat-back
HKS F-CON
HKS EVC-EZ
Mazdaspeed shortshift
Generic Boost Gauge

93 R1
35,400 original miles

278.8 peak rwhp @ 15psi
245.3 peak ft-lbs @ 14psi

 

how did you like that place i was thinking about going there on my own to tune my car. do they have a wide band accesable, and can they provide some tuning advice on the wankle

 

Yes, they do have a wideband. I'm not sure if their expertise is on tuning rotaries though. They were pretty cool and I believe they charge $100/hr for dyno tuning.

 

arent those numbers really low?

 

those numbers are pretty low with 14-15lbs of boost... you're not putting out anymore than you would with a stock set up... hmmmm


car 53

 

needs midpipe! lol

 

You're running 15psi on the stock IC?

 

Upgrade the IC, and put in a MP and you'll put down some more great numbers!!

 

looks way too rich above 4k or so, if a/f data is correct.

 

We are spreading the word about the mp tonight
hahaha! The answer to everything is a midpipe!
Just get a midpipe man, high flow cats suck and when you take off the stock one you will be mad when you see how retarded it is. Plus a high flow cat is expensive isn't it? Makes no sense not to get one.

Jonski don't you think it's okay to run 15 psi on the stock intercooler every once in a while if it's not hot out?
I'm not talking about running it all the time I mean like 1 run at the track and that's it. I think it's fine.

 

I know - the numbers are a bit low from what I've heard. Another FD owner predicted 300~310 rwhp but if you look at the A/F ratio, you see that I'm running way rich. I didn't get a chance to adjust the F-CON since I have it under my passenger seat and my girlfriend wanted to tag along to the outing.

I'm going to lean the mixture out a little but to be honest am a bit hesitant - I'd rather go through fouled plugs and an O2 sensor than blow the engine.

Anyways, what's a good target A/F ratio? 10:1 is obviously killing my H/P numbers but what's a SAFE and reliable number to shoot for? I wanna go 12.0-12.5:1 but would like some input from people who've been there.

My car has been experiencing a few gremlins though - I just changed the plugs but it hasn't solved the high RPM hesitation I've been experiencing at high boost (I think it showed up on my last run). I just picked up some new plug wires and will be installing them soon.

As for the intercooler - I don't think it's a problem if you do it when its cooler and/or occasionally. I usually have boost dialed in at 12-13 psi but understand where the concern is coming from. In any case, I need to lean the mixture out a little.

So here's my question to all of you - what A/F ratio do most people tune their FDs to?

And who has a midpipe they can let go for cheap? I might be able to trade a stock FD main cat with only 20k miles...

 

dude, you live in CA...you're aware that not only will a midpipe make your car much louder but it's also impossible to pass smog? whatever you do...don't get pulled over!

 

also, what duty cycle are your injectors running at? I don't think you're supposed to run them over %85

 

you'd want to tune for 11.1-11.5 to be extra safe. Some tune for 11.8 - 12.2 for max power. In the end, on the dyno i'd tune for safety. There is a high chance you could run into a nice crisp morning/night and run a lot leaner. Yet with stock cat and with stock ic, those numbers are pretty low.

Danny

 

Your missing is probably just caused by being too rich. The problem wil likely go away once you get your a:f more reasonable (I'd shoot for low 11:1 ratio to be safe).

Wade

 

You can easily blow the plastic end tanks off the stock ic at that much boost. They are only held on with a few metal clips. I do think a midpipe would greatly improve your numbers though.

 

is there any way to secure them better? I don't plan on running 15 psi maybe 13 at the track only

I'm not getting an intercooler for a while so if there is something I can do to make this one better let me know.

 

I have a stock IC and my car is pretty fast =D

 

full exhauist, intake and power fc..is good for 300rwhp and low to mid 12s in the 1/4

 

You'll get really closet to 300 rwhp just by pulling out some fuel. Tune it to mid 11's afr. Running the stock twins at 13/14 psi you'll be fine with mid 11's. Now if you were running a large single turbo at 13/14psi that would be a different story, you really need a lower a/f to be safe.

You might also consider running B10EGV plugs.

Throw in a mp and you'll be running somewhere between 320-340 at those boost levels but dont run 14psi on the stock IC for more than a 1/4 mile drag strip run, and then only if you intake seems fairly cool and its cool outside. During the summer stick with 12psi of boost on teh stock IC.

STEPHEN

 

twinturboteddy....

i cant believe you just said that.

you gotta get an ic. yer choking the hell out of your system using that thing. strangulation is a word that comes to mind when i think of what yer doing to that machine....if its fast now...just wait til it can breathe.

midpipes are fine if you dont mind losing your low end torque. he really doesnt need a midpipe with those mods anyhow...he has a stock ic and if the thing cant breathe in whats the point of having it blow out.

if yer driving on the street...a hi flow cat and a great ic would be the better way to go. you would have plenty of flow and would keep some low end torque too.

j

 

btw...15lbs on stock turbos and yer odds of making it past six months without having them blowing smoke like an old steam train are slim.

especially considering you need to push 17lbs thru that stock ic to see 15 in the system...the stock ic has a huge pressure drop and it forces the turbos to work a lot harder which causes premature wear and extreme HEAT. right teddy? this additional heat can contribute to side seal damage and also o premature o ring failure and heatsoak.

lots of guys do it....most lose their turbos within six months...and those guys that think their turbos are fine should pull apart their turbos to see what happens to them at that high boost...the wheels will start to become brittle with heat and little pieces chip off and blast out the exhaust....but you cant see what i mean unless you pull em apart.


good luck

j

 

Your dyno looks strange above 7k rpm. What is the sharp drop and then pick up? Notice how your A/F ratio jumps up to 13 and then goes back down? What happened there?

You are definitely rich but no worse than the stock ecu. My dyno from ATP showed me below 10:1 from 5k to 7.5k rpm.

I think the stock intercooler is really killing your numbers as well, especially at 15 psi. Your intake temps must be extremely hot. Not good. Listen to artguy, I would never run 15 psi through the stock intercooler.

 

Thanks for the input guys.

I’m going to try leaning the mixture out to about 11.5:1 the next time I get a chance to dyno the car. And to keep the boost down to 13 psi max. Like I said in my previous posts, I rarely run 15 psi – I did it for *****-and-giggles since the dyno-tech told me I was running super rich and it was a cool day. I know Blitz sells intercooler clamps for the FD (for Snook) but I’m going to opt for SMIC. But first, I want an upgraded radiator and fuel system; maybe with a HKS Twin Power. I’ll keep the injectors in mind too since there is no way I can monitor it with my F-CON. As for the midpipe, I know how loud they can get on a rotary. I had a FC with a full Racing Beat system pre-silencer and all – damn thing sparked whenever I let off of the throttle.

In any case, thanks for the info. I’ll keep it in mind next time I’m at the dyno and when I’m tempted to turn up the boost whenever a C5 or Supra pulls up

D-Man