Racecar Rebuild: its been awhile!

[demond0d5]

Yeah I here ya there! Come jan/feb/march is when I'll prolly start looking for parts again but figured I'd throw that out there for whenever =D


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[6G72gearhead]

I've figured out I can make 295's fit with flared fenders, which means I'll be running a 17x10 +18 front. The tires are $340 each and the wheels are $280 for RPF1's, so $1220 for the front end alone. Its gonna have to wait until after I graduate. Hell the 275/35/17 rears I'd need are $318 each, so just about as expensive.

However the grip will be unreal, so now I just gotta save up $2400 or so.

[demond0d5]

Yeah that's gonna be crazy!


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[6G72gearhead]

Here is video from Event #8 here in the KC region, this time back at MCC. It was a blast to run against former Solo II nationalist, suspension builder and designer, and current PSU instructor Nico Prelogar.

I only managed to place 22nd overall, tires are really holding me back at this point.

Here is the raw results: http://www.kcrscca.org/results/solo/...event8_raw.htm

[demond0d5]

had a student teacher/assistant kinda thing when I was in Dell's class in the tech center, name was Nico...same guy?

[6G72gearhead]

That would be the same guy, he's a genus with suspension!

Here we go for pictures I took them during 2nd heat and my girlfriend took them for 3rd heat.

[6G72gearhead]

Didn't get the raw times I was hoping for, but its pretty much settled that I need to get r-compound tires to PAX very well in my class.

The event was a blast though, I made some adjustments which loosened the back end up considerably as some of you may notice in a couple runs at the end of the slalom.

The fastest time out there was around 47.7 out of KU Engineering's multi-winged Formula SAE car. Right around 1000 lbs and powered by a 600cc motorcycle engine and a sequential shifter, its a seriously fast car!

[6G72gearhead]

So looking through data logs I've discovered a few things.

My speeds tent to stay between 33 and 60 mph, occasionally I get outside that but its still the average window.

The engine is running between 4000 rpm and 6000 rpm. Unless its an asphalt straight away, then it jumps straight to 7200 rpm and about 68 mph and holds until the car catches up. Which means I'm getting some pretty hard wheel spin in the straights.

Knock has been persistent around 3000 rpm and 50% throttle with 80% ECU load. This has been fixed in the tune, so hopefully its fixed.

[Exhaust power]

Nice pics galant looks pretty flat on some of corners.

[xd_01]

what are you using for a data logger?

[6G72gearhead]

I'm using the Open Port 2.0 and my dads Garmin that has a gyroscope and playback features and time stamps it, so I just line it all up and compare it to the video. A real data acquisition system would be better, but its a bit more money then I have.

Its pretty obvious though when there is a solid second and a half of the Tactrix reading 68 mph and the Garmin accelerates from 35 to 55.

[xd_01]

yea data equipment is expensive but sounds like you have a good alternative. I don't have any myself but I did download the harrys lap timer app, I haven't used it yet though. I don't think harrys collect a lot of data though.

[6G72gearhead]

The cell phone apps have always been disappointing, plus you gotta mount them solid and flat or else you don't get any usable data.

Some of the guys I run with have a program that fits their data log to a gopro allowing them to map their course and show speed, rpm, and a hud of the course in the playback video.

I would really like to get one of the systems that maps out the course I travel, so I can program in the track after I get the design and compare how well I held the optimal line. That way I can see where I can clean up my driving and keep getting faster!

[xd_01]

Most of the cell phone apps aren't precise neither. There mostly for ball park times but I do believe they come pretty close. The only reason I was considering harrys app was for a ball park figure and to see if I could overlay it on my videos so I don't have to sit there watching with a stopwatch. And Im not saying my stop watch method is precise neither lol.

The AIM SOLO is pretty popular among road racers, it doesn't a lot for the price. I want one bad but just cant pull the trigger on one yet, rather spend that on seat time. Hopefully soon though but that's why I got the Harrys app, only $10.

[greddy]

I would recommend the track attack apps developed locally in the pacnw it has been proven on countless occasions to be within hundredths of an AIM solo. Plus if you do the record option the data is automatically over laid on the video.

[xd_01]

Do you mean recording with the cell phone?

[6G72gearhead]

Is it the same as the Track Attack in the google play store? Theoretically the GPS and gyro's in the phone should be able to give a pretty good reading of what the car is doing, and should be fairly precise. I know some of my competitors are using a system that allows them to overlay each lap/run on top of each other to show their variation in their lines. I'm not sure what system they use, I really haven't looked into it that much.

[6G72gearhead]

Its weird not having anything to update. There hasn't been an event in almost 2 months, the car has been running flawlessly and I'm not modding anything until the season is over, so I've just been keeping her clean and keeping the battery charged.

On the other hand I've been working on a ton of crazy shit I'm going to have to put up here somewhere. I bought an 88 Volvo 740 wagon, which is getting a LS T56 combo, with an assortment of 240sx front suspension parts (yes they fit) and a bunch of other stuff that will make for some pretty epic hoonage. If that isn't wild enough we are bringing Keitora to the states in a big way. A little Suzuki Carry truck with a mid mounted GSXR1000 engine and gearbox, built to the hill with a Garret turbocharger! I'll share with you guys the video's of the celebratory tire slaughtering when we are finished!

[xd_01]

The wagon sounds like a fun project, wish i could add a second project.

[6G72gearhead]

Oh, this isn't a second project, its let me see, a 4th project, lol. I've got a 91 Volvo 240 Turbo that I get my boost kicks with, and a 72 Suzuki GT380 for some two wheeled action, so yeah, way too many projects, but its ok.

7 passenger drifting with the Volvo wagon will be a blast though! I'll make sure to get plenty of video of the shenanigans that ensue!