Blasphemy101's 2013-2014 AutocrossThread

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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby Ryki » Wed Dec 18, 2013 4:46 pm

Gotta say, I think your car scared the guy :P
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby Yoshi » Thu Dec 19, 2013 12:15 pm

M20_fever wrote:depends on the tire. 225 in one tire can be wider than 245 in another.


I've seen 10mm variance. never 20. I don't literally check though. lol. My point stands. Get wider rear tires. Spacers might help too.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Thu Dec 19, 2013 5:34 pm

Yoshi wrote:
M20_fever wrote:depends on the tire. 225 in one tire can be wider than 245 in another.


I've seen 10mm variance. never 20. I don't literally check though. lol. My point stands. Get wider rear tires. Spacers might help too.


My only suspension mods are the J-Stock dampers and springs. The car oversteers when you get on the gas, but it feels pretty well balanced. I may look into aftermarket swaybars to further reduce body roll and make the car more responsive, but I'll probably try to keep the balance pretty similar.

You think a wider rear track width would improve grip? If so, it might be worth trying.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby M20_fever » Thu Dec 19, 2013 8:38 pm

yeah, wider rear would help for sure. More rear sway bar is only going to make it oversteer more. A cheap test is to unbolt one side of your rear sway bar and see how it performs. I took my rear sway off and it reduced oversteer greatly.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Thu Dec 19, 2013 10:02 pm

M20_fever wrote:yeah, wider rear would help for sure. More rear sway bar is only going to make it oversteer more. A cheap test is to unbolt one side of your rear sway bar and see how it performs. I took my rear sway off and it reduced oversteer greatly.


I'm considering trying that next time. With my stupid big turbo, this car really benefits from being able to get on the gas earlier and earlier.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby Yoshi » Fri Dec 20, 2013 1:23 pm

A thicker sway made my car twitchy and actually reduced grip. If you take OFF the sway bar or get a weaker one, it'll improve both tires having traction. Which is great if you have an LSD. With the super stiff Jstock rear, the sway bar is almost over kill. Wider rear track will help stability but will also effectively weaken the rear springs. Which, in this case, could be a good thing.

But yea, wider track is why a lot of newer cars go faster than our old timey cars. It's not electronics and shit, it's just that they fit wider tires and have wider track widths.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Sun Jan 05, 2014 7:21 am

It feels like an eternity since I've been to an autocross. In reality, it's been less that a month. Here's some more footage from the last event. One is of me driving, the other is a funny little montage I put together of my friend and his Camaro.

I'm trying to find some free editing software that will let me do picture-in-picture so I can make a comparison video of us driving his car.



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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Tue Apr 15, 2014 4:04 am

Some footage from the autocrosses I attended this past weekend. The first is from the Corvette club on Saturday, and the second shows a more technical course from the BMWCCA on Sunday.



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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby Nsquared97 » Tue Apr 15, 2014 5:59 am

Haha go figure, A BMWCCA course being more technical than a Corvette club course lol. Very nice looking driving man, incredibly jealous you are already out dodging cones.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby M20_fever » Tue Apr 15, 2014 1:47 pm

Haha, that was a lo g ass slalom.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Tue Apr 15, 2014 2:58 pm

Nsquared97 wrote:Haha go figure, A BMWCCA course being more technical than a Corvette club course lol. Very nice looking driving man, incredibly jealous you are already out dodging cones.


Thanks. We're able to run almost year-round down here, but most clubs wind down for a couple of months in the summer, because it gets miserably hot. It sounds like we have opposite problems!

M20_fever wrote:Haha, that was a long ass slalom.


Yeah it was! It looks like it does, but after the first couple of cones, it didn't really open up any more. You can tell from my sporadic hand placement that I had never taken this car through a proper slalom...

I don't know if you can tell from the video, but I was shifting to 3rd right near the end of the slalom. I know if I had pushed it harder in the beginning of the slalom instead of just letting my speed hang at the top of 2nd gear, I could have picked up more time.

[EDIT] Oh! I placed 4th overall at the Corvette. There's a group of mustangs that have had a pretty solid lock on the top 4 spots for a while. I was able to edge one of them out by a couple hundredths...

No news on my results from the BMWCCA event, but I might have been in the top 5 there as well, including an open-wheel car and a Nationals-winning driver on R-compounds :).

In any case - I was really impressed with how composed the E30 is. I'm still waiting for a steering rack to pop up locally, and I'm working on resolving my turbo lag issues to give the car a little more pull out of lower-speed corners.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby M20_fever » Tue Apr 15, 2014 3:08 pm

What's your redline set at? I know bumping mine up to 7200 let me stretch 2nd gear in some critical spots to avoid the time lost shifting.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby blasphemy101 » Tue Apr 15, 2014 6:29 pm

M20_fever wrote:What's your redline set at? I know bumping mine up to 7200 let me stretch 2nd gear in some critical spots to avoid the time lost shifting.


That's a good point - I know the higher rev limit of my earlier S2000 lets me stretch out a noticeable amount of speed compared to the later models. At times, it's turned into an advantage, despite the fact that they make slightly more power.

My rev limit is set at 6500, because my valve stems are pretty worn, so it's hard to get a nice, tight valve adjustment. That, and I hate doing valve adjustments...

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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby M20_fever » Wed Apr 16, 2014 3:08 pm

6500?? At least go to the stock 6800 limit, your losing tons of time shifting dude. If you can't get a good valve adjustment its not the valve stems, its the eccentrics. Replace them, they are really cheap and make a huge difference in getting proper adjustment.
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Re: Blasphemy101's 2013-2014 AutocrossThread

Postby Nsquared97 » Thu Apr 17, 2014 5:42 am

Uhhh, stock M20 redline is 6500... At least on my car anyway. Just got a chip in with a 6900 limiter for the sole reason of autoX haha. (for the limiter anyway, also 93 octane and 17# injectors).

That's pretty awesome to be in the top 4 at a Corvette club event, nice work!
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