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Re: 60 ft frustration is driving me nuts [Re: Transman] #2792177
07/03/20 06:47 AM
07/03/20 06:47 AM
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MI, usa
dvw Offline OP
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the past couple of weeks i've been working on the car. Reconfigured the alternator to 16 volt, new alternator wiring, modified the battery tray for the XM battery. Pulled all 4 shocks. The RF Afco was leaking and the compression adjuster doesn't change dampening so its getting repaired. The rear Konis have one shock that is much stiffer in compression than the other at the same setting. Its getting checked as well. took the sticking front calipers apart and rebuilt them. New front tires. Built a data recorder with Inovate LC 2, SSI 4 and a pocket logger. Also added an accelerometer to measure Gs. It has to be removable as NMCA doesn't allow it in N/SS. @ connectors, O2 sensor and Mil spec screw on connector. Velcro holds it to the bracket. Carb swap is still coming. Have new barrel of C-14. Testing soon.
Doug

logger 3.jpglogger 2.jpglogger 1.jpg
Last edited by dvw; 07/03/20 06:50 AM.
Re: 60 ft frustration is driving me nuts [Re: dvw] #2792179
07/03/20 06:52 AM
07/03/20 06:52 AM
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The frozen wasteland of Iowa
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tboomer Online mad
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Good luck Doug! Quality work as usual! up


Having the upper hand for almost 20 years!
Re: 60 ft frustration is driving me nuts [Re: dvw] #2792184
07/03/20 07:31 AM
07/03/20 07:31 AM
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Harry's Taxi 2 Offline
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What accelerometer did you use?


'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940. "Trust the plan"-Q.
Re: 60 ft frustration is driving me nuts [Re: Harry's Taxi 2] #2792185
07/03/20 07:38 AM
07/03/20 07:38 AM
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Tulsa OK
Bad340fish Offline
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Originally Posted by Harry's Taxi 2
What accelerometer did you use?


I was just about to ask as well. They is some really cheap ones out there if you have some kind of logging device to wire them into it. I keep wanting to add one to my EFI for logging but I haven't yet.


68 Barracuda Formula S 340
Re: 60 ft frustration is driving me nuts [Re: Harry's Taxi 2] #2792186
07/03/20 07:48 AM
07/03/20 07:48 AM
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dvw Offline OP
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Used this for the Accelerometer Its the small bord on top of the SSI 4. Less than $20

https://www.adafruit.com/product/163

This sensor picks up off the parking pawl gear in the trans. Attached thru a welded bung on the tail shaft housing.

https://www.verical.com/pd/cherry-e...6n6jVWT4nGzxW84eqst18Ry-pSRYPtRoCSp8QAvD

Doug

Attached PDF document
Last edited by dvw; 07/03/20 07:50 AM.
Re: 60 ft frustration is driving me nuts [Re: dvw] #2792190
07/03/20 08:06 AM
07/03/20 08:06 AM
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Tulsa OK
Bad340fish Offline
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Originally Posted by dvw
Used this for the Accelerometer Its the small bord on top of the SSI 4. Less than $20

https://www.adafruit.com/product/163

This sensor picks up off the parking pawl gear in the trans. Attached thru a welded bung on the tail shaft housing.

https://www.verical.com/pd/cherry-e...6n6jVWT4nGzxW84eqst18Ry-pSRYPtRoCSp8QAvD

Doug


Thanks that is one I have had on the list. if I have another 5V input I will add one of these soon.

I have a different Cherry Hall sensor than that but they have been rock solid. I run them for my Crank Sensor, Driveshaft sensor, and front wheel speed sensor.


68 Barracuda Formula S 340
Re: 60 ft frustration is driving me nuts [Re: dvw] #2794179
07/08/20 07:14 AM
07/08/20 07:14 AM
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Harry's Taxi 2 Offline
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Originally Posted by dvw
the past couple of weeks i've been working on the car. Reconfigured the alternator to 16 volt, new alternator wiring, modified the battery tray for the XM battery. Pulled all 4 shocks. The RF Afco was leaking and the compression adjuster doesn't change dampening so its getting repaired. The rear Konis have one shock that is much stiffer in compression than the other at the same setting. Its getting checked as well. took the sticking front calipers apart and rebuilt them. New front tires. Built a data recorder with Inovate LC 2, SSI 4 and a pocket logger. Also added an accelerometer to measure Gs. It has to be removable as NMCA doesn't allow it in N/SS. @ connectors, O2 sensor and Mil spec screw on connector. Velcro holds it to the bracket. Carb swap is still coming. Have new barrel of C-14. Testing soon.
Doug


What's the need for a resistor(if that's what that is) between input and output voltage? I'm going to add the same accelerometer to my LM2 (thanks for the idea by the way) and the wiring diagram doesn't show a resistor.


'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940. "Trust the plan"-Q.
Re: 60 ft frustration is driving me nuts [Re: Harry's Taxi 2] #2794598
07/09/20 06:35 AM
07/09/20 06:35 AM
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dvw Offline OP
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A pull up resistor is speced with the accellerometer. The give you the spec based on your input voltage 1K for 5 volt, 2.4K for 12 volt etc.
Doug

Last edited by dvw; 07/09/20 06:36 AM.
Re: 60 ft frustration is driving me nuts [Re: dvw] #2794647
07/09/20 10:16 AM
07/09/20 10:16 AM
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Harry's Taxi 2 Offline
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Originally Posted by dvw
A pull up resistor is speced with the accellerometer. The give you the spec based on your input voltage 1K for 5 volt, 2.4K for 12 volt etc.
Doug


Thank you....I missed that when I ordered one.


'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940. "Trust the plan"-Q.
Re: 60 ft frustration is driving me nuts [Re: Harry's Taxi 2] #2798189
07/18/20 08:11 AM
07/18/20 08:11 AM
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dvw Offline OP
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Further updates. Had the Willwood Calipers apart twice. Measured the rotors, bores the pistons. Polished everything with 1000 grit. They still don't retract as I would like but are better. XS 16v Battery is installed. The regulator swap in the alternator works great. Front shocks are repaired and installed. Decided to upgrade the 20 year old rear Koni shocks to Afco big guns. They should be here by Tuesday. Data logger records A/F, RPM, and G's. Down loads correctly. How ever we're having an issue with the driveshaft speed sensor reading. Found a slight intake leak on #2/4. So that's fixed as well. Fixed a minor trans leak at the park cable housing. Hope to test this week.
Doug

Last edited by dvw; 07/18/20 08:12 AM.
Re: 60 ft frustration is driving me nuts [Re: dvw] #2798269
07/18/20 12:12 PM
07/18/20 12:12 PM
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Ambridge, Pa.
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rickraw Offline
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Those are stainless pucks, buff them on a compound wheel till they look like chrome. I had the same problem the demon.

Re: 60 ft frustration is driving me nuts [Re: rickraw] #2798310
07/18/20 01:24 PM
07/18/20 01:24 PM
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dvw Offline OP
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I did.
Doug

Re: 60 ft frustration is driving me nuts [Re: dvw] #2798382
07/18/20 04:32 PM
07/18/20 04:32 PM
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Posts: 1,397
central ohio
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nss guy Offline
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supposedly they are 2 different O-rings for them, square and round. I think the round are suppose to help with return. Something to check out

Re: 60 ft frustration is driving me nuts [Re: nss guy] #2798396
07/18/20 05:18 PM
07/18/20 05:18 PM
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dvw Offline OP
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From what I could research they claim the square are better. I contacted a guy from Willwood. Sent him all the info. I've heard nothing. Russ Konkowski, Rick Newmeyer, Casey Fauss-Johnson, John Frazier all having the same issue on there N/SS cars.
Doug

Re: 60 ft frustration is driving me nuts [Re: dvw] #2798400
07/18/20 05:36 PM
07/18/20 05:36 PM
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Anoka County, MN
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Leigh Offline
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Hopefully not the same “tech guy”, that told me their new, solid rotors had .012 runout from sitting in the sealed box. Never again.

Re: 60 ft frustration is driving me nuts [Re: dvw] #2798414
07/18/20 06:53 PM
07/18/20 06:53 PM
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central ohio
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nss guy Offline
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From classracer

52F5B02E-3B91-4875-8823-0AB4CC4CA086.png
Re: 60 ft frustration is driving me nuts [Re: nss guy] #2798515
07/19/20 08:17 AM
07/19/20 08:17 AM
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dvw Offline OP
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The Willwood spacers are .030". The calipers are spaced as close to center as you can get within .030". The pad wear is square to the rotor. The other day when we talked, the Willwood tech he made no mention of using round caliper seals. I wonder why? He also has not returned my E-Mail since. Its been 5 days. The area outside of the seal was relieved and polished along with the pistons. Now at least you can move the rotor by grabbing the wheel studs. It doesn't spin but at least it moves. Waiting on the shocks. So we'll see when its on the ground.
Doug

Re: 60 ft frustration is driving me nuts [Re: dvw] #2798537
07/19/20 09:51 AM
07/19/20 09:51 AM
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montana
BANDIT Offline
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Yeah, Wilwood customer service people don’t seem to be on top of call or email follow up. I assumed they were still out or low staffed cause of the COVID thing. Maybe....
I know you said you had changed tires, and not knowing much about your car, I’m kinda shooting in the dark, but. How heavy is car, have you experimented with tire pressures to see if maybe you can get more wheel speed out of the hole? First 2 weekends out with my dragster this year, same set up as I ended last year with, my reaction times and 60 foots were all over the place. Put new tires on, still slow on 60 ft, so dropped pressure by 1/2 lb total and Sunday, I had no worse than a .015 reaction time, less than .001 difference per lane, and cut a .000 in finals to win.
Had same frustration with my Avenger, spent waaay more time and money before finally putting tires on it to solve that. The Avenger is a 4 link and the dragster is a slip-joint, but tire pressure and condition has caused me more frustration and cost more money than I care to admit. Tires every 90 to a 100 passes is gonna be normal any more for me. Jim

Last edited by BANDIT; 07/19/20 10:10 AM.

64 Dodge Coronet 440. In progress
1998. Dodge Avenger. 8.50@162. 4900 DA
250” Neil and Parks Slip Joint. 7.36@183.
4600 DA
Re: 60 ft frustration is driving me nuts [Re: dvw] #2798550
07/19/20 10:20 AM
07/19/20 10:20 AM
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Tulsa OK
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Originally Posted by dvw
Further updates. Had the Willwood Calipers apart twice. Measured the rotors, bores the pistons. Polished everything with 1000 grit. They still don't retract as I would like but are better. XS 16v Battery is installed. The regulator swap in the alternator works great. Front shocks are repaired and installed. Decided to upgrade the 20 year old rear Koni shocks to Afco big guns. They should be here by Tuesday. Data logger records A/F, RPM, and G's. Down loads correctly. How ever we're having an issue with the driveshaft speed sensor reading. Found a slight intake leak on #2/4. So that's fixed as well. Fixed a minor trans leak at the park cable housing. Hope to test this week.
Doug


I assume you have one already but my Cherry hall effect sensor that is on my driveshaft requires a pull-up resistor. Also how many teeth does your reluctor wheel have on it? I have heard issues of some systems not being able to read them if they have to many teeth, should still work at low RPM though if that was the case.


68 Barracuda Formula S 340
Re: 60 ft frustration is driving me nuts [Re: Bad340fish] #2798699
07/19/20 07:55 PM
07/19/20 07:55 PM
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dvw Offline OP
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So to answer both questions. One rear shock locked up intermittently when it was compressed in the vice. So far its the only smoking gun. Thus the new shocks. The sensor has the pull up resistor. the park gear has 22 teeth. We use the same sensor and setup on my sons turbo car. Though his logger is AEM. Maybe its entirely possible I didn't spin the tires fast enough. Cant put it in gear yet since there are no shocks. Good thing the fuel pressure got tested. Up to 9 psi from 6 psi. Turned the front regulator 3 full turns, no change. Fabbed up a pressure tester at the regulator inlet. Put the 12 volt battery back in the car. The Product Engineering pump output was 33psi. With the 16 volt battery it was 38psi. Turned the bypass regulator at the pump back 2 1/2 turns, 33psi.
Doug

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