MP3 crash in Sport Compact Car Magazine

[biochembruin]

wow, interesting. thanks for the info

 

[TXMazdaSpeeder]

Bruin, we are out of New Braunfels, Texas!Right in damn middle of this huge state, and that makes for real looong tows to anywhere!

To answer your question about the build up of the car: you would be very suprised as to what gos into a "showroom stock" car to make it do all the things it needs to do! Aside from the safety equiptment (cage, seat, belts,ect) there is a huge amount of work that can be done to make it handle, go and stop. It took us a solid year to figure out how to make the car not understeer like a pig!

The car, with driver has to weigh in at 2780 lbs as raced. You are not allowed to do any work to the engine( like any of the top cars are running a "stock engine"!) and have to run with the cats in place, although, you can run open exhaust after the cat.

I prefer not to give away all the little things we have learned in the past few years( never know who's out there), but will tell you, this car, in the 2004 runoffs trim put out 121 HP at the front wheels. Thats with the stock intake, airbox, cams, exhaust to the cats. And the engine was"legal", and would have easily stood up to a tear down in tech!

wow, 121whp with all that stuff stock? *scratches head* ok im investigating my engine more, i dont have stock intake or exhaust and i put down 115whp. i know u dont want to give away all ur secrets but did u use the stock ecu/flywheel/clutch?

 

[SpicyMchaggis]

Thats the SCCA Stock C class. Those proteges get beat the s*** out of every single race. There is a white Mazda 3 in there now that does fantastic. Basically that class is 2.0L "MP3"s, 1.6L Proteges, Civics of various styles, Neons, and Mazda 3's..I believe there might be a couple others, but thats basically the class. They absolutely beat the s*** out of eachother.

As for GT5, I've never actually seen that P5 before. News to me. I'm a big stock C fan.

 

[jmac36]

Tx, you need to remember that "stock" is a relative term here. But I will tell you that the ecu is stock. The trick with the FS-DE engine is to get past the super rich mixture above 3800 rpm@wot. If you can get a handle on that, you can make the engine one hell of alot more effective with all the stock parts.

Now when I say stock, you need to understand that well do get to pick and choose parts that all work together. They call it "parts shelf buleprinting", and it can make engine building rather expensive. Some of the engines in SS cars are in the 10-12K range for a build, and a good "stock head" can cost you 1500-2000$.

Mostly what you try to do is remove any parasitic drag in the engine, transaxle, axles, bearings, brakes, ect. Cause those are the real killers!

Cheers!

 

[Kooldino]

Tx, you need to remember that "stock" is a relative term here. But I will tell you that the ecu is stock. The trick with the FS-DE engine is to get past the super rich mixture above 3800 rpm@wot. If you can get a handle on that, you can make the engine one hell of alot more effective with all the stock parts.

Now when I say stock, you need to understand that well do get to pick and choose parts that all work together. They call it "parts shelf buleprinting", and it can make engine building rather expensive. Some of the engines in SS cars are in the 10-12K range for a build, and a good "stock head" can cost you 1500-2000$.

Mostly what you try to do is remove any parasitic drag in the engine, transaxle, axles, bearings, brakes, ect. Cause those are the real killers!

Cheers!

So what's a good target A:F ratio above 3800rpm?

 

[jmac36]

Well, what we found is that an AFR of 12.5-13.5 works pretty damn good, but if you go more to the lean side as you get higher in the revs, it works even better.

Now remember, we do a rebuild about every 1000 miles of track time, so I have no idea what this would do to engine longevity

And yes to answer your PM, I do have Dyno sheets! We have about 300 hrs on the dyno with this car, not counting the engine dyno time. Helps when you have a Dynapack at your disposal! (lick)

 

[mp3moose]

Where in NB are you guys located? I am moving there within the year.

 

[xelderx]

All this information and the man only has 4 posts. Quit holding out on us!!!

 

[xelderx]

We are right on the edge of town, on Hy 725 to Seguin. Feel free to come by and visit!

And gee, I really wasnt holding out, just you guys get to run all those neat aftermarket parts, and I tought I would just watch and see what went on here!

I wish I got to run all those neat aftermarket parts too. I'm in SCCA Solo I/II Street Prepared so I have to get real comfy with my Bible/Rulebook on a regular basis. I'm not quite as restricted as you, but as far as the motor is concerned we are both fighting an uphill battle with all the things we have to leave stock.