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Messages - Chad D

Pages: [1] 2 3 ... 8
1
Vendor Classifieds / Re: FE Power Cast Aluminum Valve Covers
« on: February 06, 2019, 08:53:55 AM »
Perhaps I missed it somewhere, can I get a dimension from the valve cover rail to the top of the cover?  Trying to figure out if it will clear the brake booster on a '68 Galaxie.

2
Member Projects / Re: My Latest FE
« on: August 25, 2017, 02:23:53 PM »
Blair warned me about keeping tires on it, but I guess that's a problem I'd like to have! 

Throw caution to the wind.  Time to make friends with the local tire guy :-)

3
Non-FE Discussion Forum / Re: Jay's Galaxie hitch
« on: January 20, 2015, 05:45:50 PM »
Thanks Jay!

4
Non-FE Discussion Forum / Jay's Galaxie hitch
« on: January 13, 2015, 05:11:48 PM »
Jay--

Wondering if you happened to make a drawing of your hitch on the Galaxie, I'd like to pull a small camper with mine and I'm coming up zero on the commercial product front.  I've got a talented welder that will fab one up for me if you've got a hint or two...

Thanks,
Chad

5
Providing a venue for anonymous complaints certainly has the potential for abuse.  It is tough to balance the individual's desire to air a gripe (and potentially save us all some dough/time/frustration) with a vendor's need to counter that gripe (which can tell us who the good guys really are).  Perhaps require an order number and date so the vendor has the opportunity to make it right or at least successfully investigate the complaint?

6
FE Technical Forum / Re: Rear main oil seal leak
« on: October 24, 2013, 12:36:46 PM »
Maybe fiddle with the PCV choice to pull a bit more crankcase vacuum?

7
FE Technical Forum / Re: Best head choice?
« on: September 24, 2013, 10:07:17 PM »
+1 on silicone goo for exhaust gasket.  Make sure both surfaces are flat, then a thin layer of copper (orange) silicone sealer.  Never a leak after that.  Not sure if that increases heat in the exhaust side of the head or not...

8
Member Projects / Re: Clear Valve Covers
« on: August 26, 2013, 09:37:44 AM »
Thanks for the update.  I'm quite curious to see how temperature cycling, crankcase moisture, and oil pH will affect them over time.  Will you be running crankcase vacuum on this engine, or just a simple PCV/breather setup?

9
Member Projects / Re: Clear Valve Covers
« on: August 25, 2013, 06:59:35 PM »
Progress report?  Is the Lexan surviving?

10
Disclaimer:  I'm an information security professional at $DAYJOB.  A separate computer can certainly be worthwhile to use exclusively for sensitive transactions, though I'd add at least one element:  a separate email account used only for secure transactions, that will never be used to originate email.  Something like a dropbox; an account vendors can use reach you if they need to send a notification, but nothing you'll ever exchange messages with.  Since email accounts are pretty much free, feel free to segregate your online persona, as the compromise of one account will limit damage potential to services linked to that account.

The 'leaving it unplugged all the time except when in use' part can backfire, as most modern operating systems require the ability to call home to mama, or they stop working.  They expect to be able to get updates and do other maintenance for the operating system and other crapware that they load on the machine before you buy it.

Another option is a 'live CD/DVD'.  Download the .iso (disk image), burn it to media (CD or DVD), and boot off it.  Basically, it's an operating system that is run completely from a CD or DVD, that writes NO files to the hard drive, and cannot be modified, as the media is read-only.  If you absolutely need to, you can use a thumb drive to store temporary files, but this increases your risk slightly.  In layman's terms, it permits you use a second (or as many as you like) operating system on the computer you already own.  It is considerably slower because CD/DVD reader speeds are much slower than a hard drive.  If you have a relatively modern machine (<=3 years old) they generally run well if you have sufficient patience.  Older hardware may require a 'lightweight' distro.  If you really like the new operating system after you try it, many have the option of permanent installation on the same computer if you have sufficient hard drive space.

The 'live CD/DVD' and private email account(s) is most definitely my preference from a security standpoint.  Here's the live distro that I prefer:  http://www.debian.org/CD/live/  Give it a try, and if you need help, drop me a line if you have trouble addressing it by reading the FAQ:  http://www.debian.org/CD/faq/

About the only choice I'd recommend against for secure online communication is your cell phone.  Security on Android (and Apple too) is abysmal, and you're at the mercy of any software developer that has software on your phone/device.

**edit:  Just a note that the 'live' distro mentioned above is free, as in speech and beer.

11
FE Technical Forum / Holley Dominator EFI
« on: August 08, 2013, 02:03:19 PM »
Anyone here tried one yet?

http://www.holley.com/554-114.asp

12
Chad,
 No worries here. Its going to take a whole lot more than that to insult me. lol I'm all ears. I've never heard of PI but looking at the links you posted I still don't see anything that's more than 1000hz unless I missed it.

What are the issues with your friends clutch? What clutch is he running?

Pi Research is now Cosworth, news to me!  Here's one that I thought was on that page... obviously I wasn't paying attention:

http://www.cosworth.com/products/motorsport/data-loggers/sigma-lightweight-systems/

Cousin has this ECU, modded a bit by Menard Racing:

http://www.cosworth.com/products/motorsport/control-systems/engine-control-units/pectel-sq6m/

There's also an external data logger of provenance unknown to me (guessing Pi also) that interfaces with the ECU.

The clutch is a 'hybrid' to put it politely.  Car is a tube framed Opel, engine is a General Mayhem Ecoblecch, with a lightened aluminum SBC flywheel, Ram 8 inch billet clutch, DNE 5 speed, Dana 60 (5.13/spool) rear.  I'll probably burn in hell for mentioning all that on this board... apologies for the hijack, folks.

13
Looking good!

14
Hey Chad,
 Here's a link to Autometer's new Data loggers and their best system "Pro System" is only 500hz which is half of what the RacePak is and they are also using the CAN bus system.
http://autometer.com/datasystems.aspx

I'm replacing this http://autometer.com/cat_data_tachdetail.aspx?pid=10 with the RacePak system and I've used it for about 10 years with a two magnetic collar and its only 100hz so I think the RacePak with a 1000Hz and an 8 mag collar should be a whole lot better.

Like Jay mentioned. 90% of what I'm looking at is in the first second of the run and the rest is at the gear changes which all take place in the first half of the track. After that the clutch is locked up and we're just on cruise control from that point on.

If the Racepak or whatever satisfies your requirements and is at an acceptable price, then by all means use it.  I was just trying to explain how you could be limited.  Certainly my own bias was revealed, my apologies if you were insulted.  I think you might have missed where I said 'It does offer a nice one stop shopping package, though, and may be quite appropriate for your application.'

Racepak may work fine... or Autometer, or any other brand.  My main gripe with Racepak is how they are advertised as being the latestgreatestomfgdatawhutsit when they are not, and that the price tag is quite shocking for what you get.  Personally if the price tag is going to be that high, I'd start with Pi http://www.veracitydata.com/NewFiles/PiProductLine.html, but the packaging and setup may not be in line with what you expect.  Perhaps piece your own together from parts at http://www.mccdaq.com/, but I'm guessing you want a packaged solution.  Innovate also offers excellent products.  Many product similarities exist between brands, simply because they're often rebranded reference designs at extremely different price points, just like many other electronic products.

Personally, I find the resolution of Racepak to be wanting, but I'm pretty damned picky, and accustomed to doing data analysis in the >=12 bit range, and 10KHz/channel and higher sampling rate.  Seeing the rise and fall (and rate of change) of sensor values from nominal to maximum is useful to me.  Knowing the event period and scale is an important part of deciding how to measure.  High resolution does make data storage and transmission path considerations a part of the package, some el cheapo off the shelf stuff simply doesn't play along.  The principle I live by is that you can always mathematically smooth or compress a data set, but you can't just 'imagine' where dips, spikes, or frequency changes may exist; you must measure them.

For example, my cousin and I are trying to sort the clutch on his 9000 RPM bracket car.  The eight magnet driveshaft collar wasn't enough, so we're changing the sensor to a 60 tooth trigger wheel and moving it to the input shaft, to give us a better picture of the relationship between the flywheel and the input shaft when the clutch is released at the line.  His 'box' (a used Pi Indycar piece from Menard) is quite capable of handling the data stream, where a Racepak would not.  It's overkill, but the parts were on hand and offered the necessary resolution.

15
The real limit to the Racepak stuff is that it uses (used to use?) a CANbus (http://en.wikipedia.org/wiki/CAN_bus) variant, which is pretty limited for sensor resolution (it is a function of time slots at bus frequency).  All sensors are 'smart' and share the bus, the more sensors, the faster your resolution per sensor drops off, as contention limits the amount of data that can be transmitted.  In order to get the resolution back, you need to run a multiple bus setup.  This is pretty old tech, in place for a long time on big rigs and many European cars to make maintenance and repair regimens more cost effective.  Works very well for low data rate streams or very simple controllers.

For most peeps, CANbus works just peachy, but if you're needing analog to digital analysis at high resolution (bit 'depth' of resolution) and high frequency (Kilo or Mega Hertz) to uncover transitory events, you're pretty much out of luck with Racepak.  For example, seeing clutch chatter by comparing crank sensor speed to trans input speed is pretty much impossible with the two magnet collar setup, but moving to the eight magnet setup, it's possible, if you have enough bus time to sample fast enough.  A vibrating broken or loose sensor wire (or other intermittent connection) can be diagnosed with high frequency sampling, you can see the value shift quickly from a valid number to zero, and back.  Insufficient frequency will often just show a wandering low average, as the sample often is not at zero but transiting between zero and a real value, which can cause you to chase a phantom tune.  Wideband O2 sensors also sample much faster than is generally acknowledged (individual cylinder events can be distinguished), but the rise and fall of sensor values (response curves) are only visible with high frequency and high resolution sampling.  For appropriate sampling choices, consider reading a bit on the Nyquist-Shannon sampling theorem:  http://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem

As far as data acquisition and analysis technology is concerned, Racepak's best stuff is kinda old tech.  It does offer a nice one stop shopping package, though, and may be quite appropriate for your application.

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