Help me win at autocross, I wanna be a top 10 car and driver! |
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Help me win at autocross, I wanna be a top 10 car and driver! |
crash914 |
Jul 1 2014, 06:49 PM
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#1
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its a mystery to me Group: Members Posts: 1,827 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
ok, I need help. currently I am about 3 to 5 seconds off the pace in my local club events. I know most of the time is due to the driver. I think that there is some time in the car also as it is mostly set up for the long track.
Here is what I know so far, if more info is needed..ask... 73 914, blue. bolt in cage, just the 4 plates plus the seat belt for tie in points. stiffly sprung, Koni yellows, I think 250 lbs in the rear and 21 or 23mm torsion bars in the front. Delrin bushings everywhere, I have needle bearings, just not installed. lowered, see pictures for height. 4 inches in the rear to the bottom of the engine mount bar, 4 inches in front to the bottom of the front floor pan. 205 50 15 tires, not sure of the wheel width, 4 lug. my tires are about 8 year old khumo v710's that have been in the garage and have 4 autocross days on them now. air pressure I have been running, 22lbs front, 20 rear. see pictures for chalk. looks like I am using all the tread. Camber is close to -2.4 degrees front and rear. Front toe is 0, not sure about the rear, perhaps 1/4 inch toe in. Motor is 103 by 80, nickies, split cam, le200 heads, tangerine header, 6800 rpm redline, 11:1 compression, so plenty of grunt. Megasquirt with twin throttle bodies. Transmission is open diff, with a flipped 5th gear for 3rd and standard 5th. no camber plates, See pictures in the following posts.. |
crash914 |
Jul 29 2014, 08:04 AM
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#2
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its a mystery to me Group: Members Posts: 1,827 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Agreed...I need a camera mount for the outside. I have the rollcage mount for the gopro already..
As far as data collection, I have been trying out lots of stuff. I am running MegaSquirt, so no ODB2 or other electrical interface. I wanted to do something with the AIM Solo with Trail brake Matt, but did not want to go to the trouble of installing another data collector... So, what I figured out is that I already have a bitchin data collector with the mega squirt. I get throttle, Manifold pressure, rpm, fuel flow, AFR and much more. What I didn't have was the GPS data. Palm slap, smart phone! I added a Qstarz GPS 10hz receiver via Bluetooth, now I can use the phone as a camera and data position collector (no rpm though), I was trying "Track Attack, and RaceRenderHD. ok, looks good. what about my fuel system data? Add Shadowdash for the megasquirt, now I can log everything, speed, G's, rpm, throttle. Great, but no camera....ok add the gopro and combine both in RaceRender. I am using the free edition now, but will upgrade shortly as it is so easy to use. I am finding the camera the best tool so far. I can see my hands and position. the data tells me I am nowhere near the limit on G's. The run with data I maxed at somewhere about .8 or .9. I have other data logs up to 1.4...(that is why I know my tires aren't too bad ) Long but I hope this gives you some ideas... |
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