D-Street Type R AutoX info sharing

[baldheadracing]

So question about fuel level, I haven't ran the car low on course yet(granted I've also done 4 autoX total with the car). How long have people run the car without running into fuel starve? GTI have no issue running the well past the point the light comes on and never really have had fuel starve on course. Older Honda you probably shouldn't be running much lower past half tank. What about a new Honda?

I've only filled up immediately twice after fuel issues, and there was 10l and 12l left, respectively. (Tank capacity is 47l) So that's about a 1/4 tank. However, that was on course, not at autox.

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[bouford]

So question about fuel level, I haven't ran the car low on course yet(granted I've also done 4 autoX total with the car). How long have people run the car without running into fuel starve? GTI have no issue running the well past the point the light comes on and never really have had fuel starve on course. Older Honda you probably shouldn't be running much lower past half tank. What about a new Honda?

lowest i have gone without fuel starving is 3/8 tank, however @RedFK8 in DSP trim recommends no less than 1/2 tank.

 

[Apex Carver]

So question about fuel level, I haven't ran the car low on course yet(granted I've also done 4 autoX total with the car). How long have people run the car without running into fuel starve? GTI have no issue running the well past the point the light comes on and never really have had fuel starve on course. Older Honda you probably shouldn't be running much lower past half tank. What about a new Honda?

I’ve done a 1/8 tank with no problems on asphalt. I’ve heard others with issues around 1/4 tank so YMMV

 

[RedFK8]

lowest i have gone without fuel starving is 3/8 tank, however @RedFK8 in DSP trim recommends no less than 1/2 tank.

Lol I’ve had “low fuel pressure” CELs come on on the way to the track hanging the huge sweeping horseshoe turns going up hill at 1/2 tank too. I wonder if anyone has tried installing fuel cell foam to stop the sloshing in the tank.

 

[destoups]

So, 2 events at Packwood: Local Pro Solo and regular local the next day. The target, again, is Mr. Otis in the FoRS. The pro turned about as expected, with Ryan 1+ seconds ahead over two ~32 courses; we only got 60 foots for a couple of runs but gap was about .5 a side. I'm sure a more experienced Pro driver could find a way to not sleep at the lights and cut that to maybe .3?

Next day, a somewhat technical, speed maintenance course with a kink at the start to remove launch advantages. Had him through three runs and screwed the pooch on the last. I shouldn't be happy when I lose but I was stoked to be that close. Course favored CTR tho.

Still no aftermarket bar on my car, rear pressures at 38 were plenty for rotation (asphalt), and I think I may look for a less bitey pad up front because I don't have enough self control to properly modulate my right foot.

 

[FifStreet]

I don't know if this is the right place to post this, but I just wanted to congratulate myself. 1st autocross event of the season and my 3rd ever. I got first place in the novice class!!!!

My fastest run was my last, and it was in a light rain.

It was also my first time running it with the traction control off... scared the crap out of me in the first corner. lol.

 

[burglar]

Congrats!

Yes, yes, take a deep, long hit at that crackpipe. Before you know it you'll have the fenders chopped off, 315 Hoosiers square, and will be trailering the car to Lincoln in September.

 

[bouford]

 

[bgood]

I will get back to Autox in a few weeks. Car is almost ready. I have a question about launching. I have yet to attempt launches, since I don't quite have 600 miles on the odometer. I did a half-launch attempt when getting on the freeway. The fronts hit the paint band across the freeway (in first gear), and the car immediately cut out fuel. I was going maybe 15 mph. I don't really want to be in that situation during a competition run. So, when launching, what is the ideal RPM--this is on a seasoned asphalt surface--and what about short shifting? What has worked best?

 

[bouford]

depends on the course but i've had success with manual launching at 3K without any issues. don't forget to disable VSA (R mode, 10-second hold).

 

[sundaydriver]

That is interesting. I would think that surface/tire temps would affect grip at both ends and therefore tail happiness would not change. The fronts do warm up more than the rears, but my first run on equally cold tires led to a spin 20 seconds into the run. Perhaps there is a threshold for grip that is not met at 40F that affects mainly the rears. I think I might try to disconnect the Karcepts bar for a few runs if it is cold at the next event to see if that corrects the problem. Of course, the apply more throttle fix to the rear stepping out could improve times!

This is with the .095" wall bar? Which is about 10% stiffer than stock on the softest setting if I'm reading their website correctly? I'm on the stock bar and I've rarely needed more rotation but occasionally had too much on cold crappy surfaces. Thinking I might need this for concrete though and I'm on the waiting list for Sprint Nats.

 

[destoups]

This is with the .095" wall bar? Which is about 10% stiffer than stock on the softest setting if I'm reading their website correctly? I'm on the stock bar and I've rarely needed more rotation but occasionally had too much on cold crappy surfaces. Thinking I might need this for concrete though and I'm on the waiting list for Sprint Nats.

I went to Crow's NT and the car did not rotate nearly the same way as it did on asphalt in similar temps; the other CTR in class, with the Karcepts, rotated well.

 

[RacingManiac]

I think if I am set on sticking with the 275/245 stagger I don't think I need Karcepts at all. The car is pretty neutral on concrete or asphalt to the point that on cold tires its a bit of a handful. But I don't plan on sticking with stagger so Karcepts will probably work as a tuning tool.

 

[sundaydriver]

I think if I am set on sticking with the 275/245 stagger I don't think I need Karcepts at all. The car is pretty neutral on concrete or asphalt to the point that on cold tires its a bit of a handful. But I don't plan on sticking with stagger so Karcepts will probably work as a tuning tool.

Going 275 square then? Do 275s make first gear more usable getting power down?

 

[RacingManiac]

I am going to try 275 Rival S square first. If I go Bridgestones in the end it'll probably be 265s...

You are gonna be struggling with 1st whatever you use, but I haven't really done any launch outside of a normal autoX, non-Prosolo start....

I was hoping the gearing would be better with 275, pure math wise it was supposed to be almost 64mph in 2nd, but if you back calculate the rev/mile on Tire Rack's spec it ends up being about 61.5, which is about what I see on GPS data...

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