Well, here are the results of my day with XS. Not too shabby considering I am still running a cat and my cat back is actually
semi-quiet. Were I to put a mid pipe and my dual N1 i would be right under the 400RWHP mark. This is also with conservative tuning. He had it up to 370RWHP but retarded the timing because it was just starting to detonate.

 

Thanx for the dyno graph. I'll post mine when it is done in the spring of 2002.

Ken

 

care to tell us the rest of your mods and what boost you are running?

 

sure... M2 MedIC, stock pimary inj., 1100cc sec., RRFPR, ND High flow pump, street port, Racing Beat Alum. flywheel, ConterforceDF Clutch, Crane Hi6 on leading coil, ProfecB set at .9 low, and 1.0 high. And of course.. PFC!
I know they are not record breaking numbers, but I was pleased and I can push it as hard as I want all day long. If I want some more power I have to give up some of comforts of having a relatively quiet car. I like being able to hear my radio and not alway looking around for cops. But that cost me some HP. They also set the fan to come on at a lower temp, which is nice, now I can get rig of another toggle switch.
It was kind of crazy, if you have not ever heard someone running a dyno on a rotary its a little nerve wracking hearing your car wind up like that. I would listen to it going higher and higher and its getting louder and louder and and you can feel the pressure building and parts stressing and just pray that these guys know what they are doing. The higher you go the harder you pray! To be honest, by the time I was done I don't know if I could have taken any more! It was like "I'll take the 360 and run".

 

You should hear Ari or Steve dyno their cars!

 

Looks pretty ragged up top ... you might be getting some ignition breakup or maybe some detonation. Have you ran it with a wideband? I'd be careful ...

 

I did not run the car, XS Ebgineering did all the runs and the adjustments. They said that the boost was fluctuating a little up top and that my exhaust was causing some problems with back pressure. My knock sensor is picking up noise form somewhere which I think was making them uncomfortable. They thought maybe it was noise from the non resistor plugs but changed them today and the noise is still there. I think there is a problem with the insulated wire. I will keep looking for the problem.

 

Good for you man glad you're happy with the results. Hahah gettin your car on the dyno is not fun...especially a rotary. Every pass you pray to the rotary gods to spare you yet again from a braaaaaaaaaaaaapppp*pop*.

I've been there on a couple FD, including mine, hitting the dyno and it is some scary stuff. Makes it worse when its your car and your thinking...hmm i'm paying money to torture myself like this.

 

Exactly! It may sound cool when its not you car, but when you are footing the bill its almost unbearable. I keep remembering that video of the guy making some outrageous HP, everything was cool, then clack clack clack!!! Holy ****, its all over... you really have to trust whoever is doing your car. I half wanted to tell them to push it more, but there was no way. I baselined at 298 at 7 psi I figure I probably got an extra 15 or 25 peak HP out of it but much more in the midrange. Plus the main thing, some piece of mind knowing that everything is in order.

Ken, what is taking so long?

 

I just like to say that a dyno run is such a lighter load then the street. If you can't do it on a dyno, then you won't make it on the street.

 

Getting my engine rebuilt.

Ken

 

Ken I will be waiting to see how things comes out for you.

Spyfish... I am not sure how to respond to that. "I will not make it in the street"? I am not trying to make it anywhere. I am just playing with my car.

 

It just seems like there is a nervous nature to some of these post. The fact is that your car is more likely to blow up on the street than the dyno. I do indeed think that who is tuning your car is important. Just don't think that just because it survived a dyno run that it is safe on the street.

 

In that case I will have to dissagree with you. I think the dyno is much harder on the car than driving in the street. For really one main reason, there is no air flow. The dyno is going to simulate driving on the street so there is a load on the car, well not all dynos are the same, but the clayton that i use for example wieghs the car and loads the rollers accordingly. If a problem is going to happen it will be on the dyno. I can simulate an incline, change the load to whatever I want.

 

Well let me disagree with you. First of all I think most people use inertial dynos like Dynojet as opposed to the Clayton. A Dynojet has only the drum weight (should be 3600lbs) as a load. You can use proportional air to load it. You can't really do dyno (HP runs/tuning) when in the proportional air mode so really you aren't going to overload the engine on a dynojet. Now if the car has a pre-existing problem or the car has too many hots runs or is over-reved than you can kill it on a dyno. In those cases that car would have died on the street anyway.

Lets also think about this idea. If dynos were really that hard on engines, then you would see all the dyno shops closed up. In the end it comes down to operator. Like I said before, the tuner (operator) is important, but a dyno run should be safer than the street.

For example: I know someone who did 6 runs with the XS remapped ECU on the dyno. He let the car cool down between each run. On the first street run he popped his motor. Just food for thought.

 

I know what you are saying, and you have a valid point. The stress that comes watching my car on the dyno may not be rational, it is just a whole different feeling standing there hearing it than it is sitting inside of it driving it. Initially I was just talking about how it "felt" to watch my car on the dyno as an observer as opposed to a driver. Now maybe my feelings are not rational and in reality my car is working harder on the street. But that does not change the experience, rational or not.

 

ok, ok, I surrender! I do see your point. I guess I was trying to let you know that you shouldn't worry-or at least as much. I personally think it is quite impressive to see/feel cars dyno.

 

glad you two worked it out without having to take it to the dragstrip. I was expecting this to escalate into a full blown conflict. hahahaha
Nice numbers.

 

Wow that looks weird, correctme if i'm wrong, but the HP and torque curve x-over is usually around 5250 rpm, your dyno sheet shows the x-over at more than 6500 rpm!!

 

Classic reason to look at the scaling ... they are different for HP & TQ.

 

Steve's sounds like a damn jet airplane taking off !

 

Hey John!
It was done at XS Dyno out in Cali so they might have been experiencing some after shock !
The power looks good but the graph is showing signs that would have had me worried. Like John asked before what was the A/F ratio on the run?

crispeed

 

Yo Chris, you have the wrong person. Thats Ryan (forum owner). Boostn7 is in lower case for John Durate.

 

What exactly about it worries you.. now you are making me worry! I did some runs last night at the track and my A/F gauge was showing just a tad bit lean, like one yellow bar which should be about .78V so I added a little fuel up top with the pimm setion of the PFC.

 

Ummm, I hate to be an ***, but the max scale for the torque curve is 300, if I normalized it to the same scale as the hp (400) the torque curve would be even lower. Meaning the x-over wouldn't occur until well pass 7000 rpm!!!