Search found 568 matches

by jpetillo
March 7th, 2008, 10:39 pm
Forum: Tech Tips, Rules, and Safety
Topic: Max RPM on straight
Replies: 8
Views: 5106

Re: Max RPM on straight

You also want to check your tach, Some are really far off. Mine's 300-400 RPM off at 6000. It may not answer why you're 1500 RPM shy in top gear, but it may be reading too low all the time and you may be beating up your engine by spinning it too fast in the lower gears.
by jpetillo
March 2nd, 2008, 1:02 pm
Forum: General Discussion
Topic: Data Acquisition
Replies: 14
Views: 6320

Re: Data Acquisition

Jim & Brian, very good points - I agree with both of you. I agree that you can do a lot for $1000 (more than I'm willing to spend at this point), but also whether the cars are sloppy or not, data is data and can help tell you what's going on - like that something is improving as you make modific...
by jpetillo
March 2nd, 2008, 9:22 am
Forum: General Discussion
Topic: Data Acquisition
Replies: 14
Views: 6320

Re: Data Acquisition

It's interesting that the web sites suggest that GPS can provide a more accurate track mapping and track timing than the accelerometers. I guess that it all depends on the quality of the components that racers can afford to buy for accelerometers (or lack of quality). Without gyros, you can't easily...
by jpetillo
March 2nd, 2008, 8:43 am
Forum: Tech Tips, Rules, and Safety
Topic: Crankcase ventilation
Replies: 18
Views: 9615

Re: Crankcase ventilation

The smoke seemed to coincide with the right-hand turns heading away from the camera. Were those corners longer than the ones on the way back up the course?
by jpetillo
February 28th, 2008, 9:12 am
Forum: General Discussion
Topic: Fuel testing rules
Replies: 45
Views: 20402

Re: Fuel testing rules

As a Vee guy, I viewed the SCCA's fuel rules as a way to force us to support the racing fuel industry, when we'd be happy running just inexpensive pump fuel. It's a significant additional expense!
by jpetillo
February 27th, 2008, 7:26 am
Forum: General Discussion
Topic: On board camera suggestions
Replies: 45
Views: 15805

Re: On board camera suggestions

Ed & Jpetillo, What model Sony camera are you using? I'm using a Sony DCR-TRV320, which allows a remote camera, mic. and Lanc control (control it from the cockpit). It's an older DV tape camcorder, but I had it and it works! The benefit about mounting the camera where you want is that you don't...
by jpetillo
February 26th, 2008, 11:00 pm
Forum: General Discussion
Topic: On board camera suggestions
Replies: 45
Views: 15805

Re: On board camera suggestions

Ed Womer wrote:I have a Sony digital camera with a remote lense (on roll bar) and remote mic (in box that holds camera) as well as a switch that allows me to turn on and off the camera since it is located above my legs. Ed
I have pretty much the same setup.
by jpetillo
February 24th, 2008, 12:28 pm
Forum: General Discussion
Topic: Oz FV
Replies: 2
Views: 1850

Re: Oz FV

Excellent!
by jpetillo
February 23rd, 2008, 11:44 am
Forum: Tech Tips, Rules, and Safety
Topic: Bead Seats or Alternatives
Replies: 5
Views: 3842

Re: Bead Seats or Alternatives

Kevin, thanks for the sourcing and installation suggestions. Yes, the Pegasus creafoam what what I've been looking at.

Regards
by jpetillo
February 13th, 2008, 10:06 pm
Forum: Tech Tips, Rules, and Safety
Topic: Bead Seats or Alternatives
Replies: 5
Views: 3842

Re: Bead Seats or Alternatives

Brian and Dave, thanks! Yes, my daughter will need a good amount of space made up, and I'm certainly worried about ending up not compromising seat strength in the process. It sounds like the bead seat would give us the ability to try a lot of positioning options so that the seat works and the belts ...
by jpetillo
February 13th, 2008, 12:15 am
Forum: Tech Tips, Rules, and Safety
Topic: Bead Seats or Alternatives
Replies: 5
Views: 3842

Bead Seats or Alternatives

I was wondering what experiences people have had with fitting/forming bead seats. I was looking at bead seats last year, and remember finding information on an alternative, but similar, seat that didn't take the ~1 hours of sitting-in-it time that the bead seats take. But, I can't find where I stuff...
by jpetillo
December 25th, 2007, 1:54 am
Forum: Tech Tips, Rules, and Safety
Topic: Latest Fastrac
Replies: 43
Views: 17508

Re: Latest Fastrac

You seem to believe that the majority of FVs are at the existing minimum weight. Kevin, I'm sorry that I gave you that impression. I don't believe that at all. It seems impossible to state anything clearly enough on the forum to not get misunderstood. What I was trying to say is probably better sta...
by jpetillo
December 24th, 2007, 1:07 pm
Forum: Tech Tips, Rules, and Safety
Topic: Latest Fastrac
Replies: 43
Views: 17508

Re: Latest Fastrac

It would take a significant performance enhancer to get us even close. You would need something like split fire spark plugs. <g> Maybe 8 of them. Jim Jim, That was pretty funny. Just when I thought I might have made a mistake with my response earlier, you've given me reason to be hopeful. I like th...
by jpetillo
December 24th, 2007, 11:19 am
Forum: Tech Tips, Rules, and Safety
Topic: Latest Fastrac
Replies: 43
Views: 17508

Re: Latest Fastrac

This is not a hijack to this topic. If you have anything to share on this, please make that opinion known to the CRB, and the FV committee, and start another topic if you feel it is deserved - after you have made your view known to the official channels. Perhaps they can allow us another power incr...
by jpetillo
December 22nd, 2007, 2:23 pm
Forum: General Discussion
Topic: New HANS device info
Replies: 65
Views: 34764

Re: New HANS device info

There is no consideration of brain energy in the design of the HANS. The body and the neck must move as a unit to prevent neck injury. I think we agree completely on that point. Adding a damper is not practical. How much distance is available for the damping function before you cause a neck injury,...
by jpetillo
December 22nd, 2007, 11:26 am
Forum: General Discussion
Topic: New HANS device info
Replies: 65
Views: 34764

Re: New HANS device info

I'm not sure we want our head and body to decelerate together. There's a balance, I believe. Assuming that it's the straps holding us in, we do want our head and body to accelerate together so that we don't hurt our necks. There doesn't seem to be a perfect solution for this, but the tethers help in...
by jpetillo
December 11th, 2007, 9:14 pm
Forum: General Discussion
Topic: New HANS device info
Replies: 65
Views: 34764

Re: New HANS device info

Isaac Device Nice, I hadn't seen this before! I knew when I hit "Gearheads click here" that they'd mess on the physics explanation. Oh well. Anyway, it appears that they found a neat way to use dampers, and have a nice product as a result. Daryl, how easy is it to get out of the car? Do y...
by jpetillo
December 8th, 2007, 11:00 am
Forum: General Discussion
Topic: New HANS device info
Replies: 65
Views: 34764

Re: New HANS device info

I don't know how true it is, but I heard and/or read about the cost diffrences in several places last year when I was looking. Supposedly there's more manual work required in the manufacturing process for the higher angle models to get a sufficiently consistent performance, and that's what the price...