Search found 1390 matches

by dewittpayne
Mon Aug 06, 2018 1:19 pm
Forum: Solo
Topic: Event 8 in the books
Replies: 14
Views: 326

Re: Event 8 in the books

According to wheel speed and RPM, my minimum speed at the last turn was 25 MPH and 2500 RPM. According to my last chassis dyno run, I have about 300 ft lbs of torque at the flywheel at that speed. No need to downshift. I was never happy with my line, though. Mostly I was braking too late and sliding...
by dewittpayne
Mon Jul 16, 2018 10:47 am
Forum: Solo
Topic: My car class?? Solo?
Replies: 10
Views: 322

Re: My car class?? Solo?

If you're serious about autocross, you might want to look at the Starting Line school at Bristol the Saturday before the ETR event. It's not inexpensive, but it comes with a lot of freebies as well as getting you off on the right foot with high quality instruction. It's a lot easier to start with go...
by dewittpayne
Mon Jun 25, 2018 9:54 am
Forum: Solo
Topic: Event 6 after action
Replies: 13
Views: 557

Re: Event 6 after action

There was a big bump in the middle of the first left hand sweeper. Phil Smith's 911 would get a lot of air with his left front tire there that wasn't just from front end roll stiffness. I hadn't thought about checking shock temperatures after a run. Maybe I should think about spraying the shocks as ...
by dewittpayne
Thu Jun 21, 2018 2:41 pm
Forum: Solo
Topic: June 24th BMS Event 6
Replies: 20
Views: 680

Re: June 24th BMS Event 6

Looks like I'll get a chance to test my 'rain' tires on Sunday. OTOH, forecasts can change rapidly around here.
by dewittpayne
Mon Jun 18, 2018 10:15 am
Forum: Solo
Topic: Car Classing Help
Replies: 6
Views: 324

Re: Car Classing Help

You can't add side skirts in SP either.
by dewittpayne
Mon Jun 04, 2018 9:46 pm
Forum: Solo
Topic: Race seats in Street class
Replies: 9
Views: 378

Re: Race seats in Street class

The only proper way to attach a harness is to a roll cage. Harness bars are evil, as are four point harnesses. Even if you're not using the harness on the street, which you shouldn't, the bar itself can be dangerous in a wreck.
by dewittpayne
Fri May 25, 2018 12:12 pm
Forum: Solo
Topic: Bristol double wait list
Replies: 33
Views: 1101

Re: Bristol double wait list

The certificate I won in the Underdog Shootout was good for the whole entry fee for a Champ or Match Tour. That's a bit more than $40, more like $90-110. That still doesn't match the tire wear factor, though.
by dewittpayne
Thu May 24, 2018 7:52 pm
Forum: Solo
Topic: Bristol double wait list
Replies: 33
Views: 1101

Re: Bristol double wait list

The Champ Tour filled up really fast. The Match Tour was a bit slower, but hit the cap in less than 24 hours.
by dewittpayne
Mon May 21, 2018 1:04 pm
Forum: Solo
Topic: Spring Nats
Replies: 64
Views: 1570

Re: Spring Nats

Just a reminder: registration opens for the Bristol Match and Champ Tours at 7PM EDT on Wednesday.
by dewittpayne
Sun Apr 29, 2018 10:53 pm
Forum: Solo
Topic: Event 4- Saturday May 12
Replies: 34
Views: 1775

Re: Event 4- Saturday May 12

I'm going to the SARRC/MARRS races at VIR that weekend. For reasons that are not at all clear, Mother's Day weekend is the traditional date for this event.
by dewittpayne
Thu Apr 26, 2018 4:50 pm
Forum: Solo
Topic: Club Training, need a conference room for 1 hour
Replies: 15
Views: 987

Re: Club Training, need a conference room for 1 hour

You might want to put together a one or two page handout/manual for reference. Station Captain training for road racing is mixed. DC Region, for example, has captain-in-training for experienced workers. It's part of their requirement for a National F&C license. The CiT is in charge of the station, b...
by dewittpayne
Mon Apr 23, 2018 2:33 pm
Forum: Solo
Topic: Event 3 after action
Replies: 22
Views: 1176

Re: Event 3 after action

When I had Koni's on my car and I stiffened the front shocks too much, it wouldn't turn in. Too little rebound on the rear made the car unstable.
by dewittpayne
Tue Apr 03, 2018 4:54 pm
Forum: Solo
Topic: March 29-31 zMax Match Tour
Replies: 92
Views: 5608

Re: March 29-31 zMax Match Tour

I see the Challenger has an SLA suspension so the motion ratio is going to be significantly less than 1. Since the wheel rate is the spring rate times the square of the motion ratio, the wheel rate is going to be a lot less than 700 lbs/inch. Here's a link to a short article about calculating spring...
by dewittpayne
Tue Apr 03, 2018 4:09 pm
Forum: Solo
Topic: March 29-31 zMax Match Tour
Replies: 92
Views: 5608

Re: March 29-31 zMax Match Tour

700 thinking about going stiffer.. but not sure the dampers would handle much more.

Can you put in a bigger anti-roll bar?
by dewittpayne
Tue Apr 03, 2018 4:06 pm
Forum: Solo
Topic: March 29-31 zMax Match Tour
Replies: 92
Views: 5608

Re: March 29-31 zMax Match Tour

NO less would be bad, a certain amount of travel is needed or you hit the stops hard and unload the suspension.... I think DeWitt is asking why John isn't running stiffer springs, which isn't the same thing as travel. Well, yes, more or less. You can see from the video that JB is barely, if at all,...