Recent Posts

51

Build Diaries / Re: Belly Tank Build Diary

« Last post by Jack Gifford on May 21, 2024, 12:35:07 AM »

... I really like Hall Effect sensors...I am using a reverse biased gear tooth sensor...

Gear tooth sensors generally have only two wires. Hall effect transistors require three wires (as do all transistors). And Hall effect transistors respond to a magnetic field, not to ferrous metal. So- how do these "gear tooth sensors" function?

52

Build Diaries / Re: Getting ready for Bonneville(rebuild)

« Last post by Stan Back on May 20, 2024, 05:39:11 PM »

Took a while, huh?  But must taste so much sweeter knowing this could have been, and surely might, be bettered!

Stan

53

Build Diaries / Re: Getting ready for Bonneville(rebuild)

« Last post by Rex Schimmer on May 20, 2024, 05:10:31 PM »

John and Troy,
CONGRADULATIONS!!!! Great to see a really impressive run.

Rex

54

Build Diaries / Re: Getting ready for Bonneville(rebuild)

« Last post by jl222 on May 20, 2024, 02:15:33 PM »

  A great weekend at El Mirage, Shattered are NOV record by 30 mph at 252.485 

  IN car video by Great Shots Vidos shows Troy driving like hell to keep control and still go fast.

  Troy more aggressive on throttle caused more wheel spin and more backing in and out of throttle
and lots of steering.

   Data log shows air fuel ratio in mid 10s and lower at 7700 rpm AND 37 LBS of boost at end of track.

  Video by Jason Andrews at start shows black smoke from exhaust in 1st gear which is good and safe
but maybe to rich for Bville at 4200 ft. Car disappears in dust to see after a few seconds if black smoke continues.

  Our turner Scot Clark [of Real Turners] wants Troy to send Email of download to review and make adjustments from half of the country away

                         JL222

 

55

Build Diaries / Re: Belly Tank Build Diary

« Last post by Rex Schimmer on May 20, 2024, 12:53:53 PM »

Best thing that has ever happen to a Renault! Talk about "making a silk purse out of a pigs ear"! 200 in that car would be a real heart stopper.

Rex

56

Build Diaries / Re: Belly Tank Build Diary

« Last post by Mike Brown on May 20, 2024, 08:43:34 AM »

A very "interesting" car that pitted beside us at the ECTA event this month.  It is a 1959 Renault with an 85" wheelbase.  It is powered by a 3.8L Buick V6.  The engine had a large single turbo and the owner claimed 1,100hp on the dyno.  The interesting thing was that the output of the turbo was connected directly to the throttle body.  There was no intercooler.  He ran water (no methanol) injection before and after the turbo.  He showed me data from a run with over 30pounds of boost and the manifold temperature was only 140 degrees F.  His goal was 200mph in the 1/2 mile.  He ran multiple passes at 183mph with a best of 184mph.  He was plagued with traction issues the entire event. 

57

Build Diaries / Re: Belly Tank Build Diary

« Last post by Mike Brown on May 20, 2024, 08:34:26 AM »

The sensor for the front wheel was much easier.  I used the same sensor with the "spokes" of the brake rotor as the target.  Using a simple hex brass spacer the sensor was attached to the inner wheel disk. 

58

Build Diaries / Re: Belly Tank Build Diary

« Last post by Mike Brown on May 20, 2024, 08:31:48 AM »

I feel the need for more data to determine where the slippage is in this application.  I have the data logger on the car and there are additional inputs that can be configured for "frequency" signals.  The data logger allows me to apply the math to convert the frequency to MPH.  I decided to add Hall Effect sensors to the front and rear tires so the tire speed can be logged separately.  I really like Hall Effect sensors since they have a reliable square wave output.  I am using a reverse biased gear tooth sensor (GT1) that is available from Ebay for $25.  These sensors have a magnet inside the sensor and detect ferrous metal.  With properly configured target they and operate reliably from zero speed up to 20kHz.  I decided to use two pulses from the driveshaft at the transmission.  I machined a wheel that can be attached to the drive shaft yoke that is wide enough that the sensor will still work properly as the drive shaft moves in and out with the suspension movement. 

59

Build Diaries / Re: Springfield Flyer.

« Last post by tauruck on May 20, 2024, 04:27:49 AM »

Boys, I had to get a new email address.

pro1racinglsr@outlook.com

For those that had the old one.

God Bless.

60

Bonneville General Chat / Re: The camera on the salt flats

« Last post by ratpatrol66 on May 19, 2024, 11:13:16 PM »

Seems they have changed the link
new address here: https://horel.chpc.utah.edu/data/station_cameras/bflat_cam/bflat_cam_current.jpg

Maybe you didn't get the update

I had no idea about this. Thanks for the update. I couldn't get my daily fix.