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.. |
karnak |
Aug 7 2014, 09:24 PM
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#2
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Newbie Group: Members Posts: 11 Joined: 22-August 10 From: Abbotsford, BC, Canada Member No.: 12,090 Region Association: Canada |
(IMG:style_emoticons/default/agree.gif)
Lots of great info here. I have some of these issues, but have my car mostly sorted out. I did have 2 sets of the same tires and wanted to use up my older ones. It finally happened. My other set was so much better, I regret not switching sooner. My car, driven by a local PCA member, beat out a GT2. There, is an interesting example of the importance of the driver. I am running poly-bronze bushings all round. (In case it matters). I have not seen anyone else mention them here so I am not sure if it it is relevant. (IMG:style_emoticons/default/biggrin.gif) |
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