FrontEngineDragsters.Org Forum

Technical => Dan Dishon's Transmission Den => Topic started by: jspell on October 09, 2016, 05:28:46 PM

Title: Transbrake Delay Box
Post by: jspell on October 09, 2016, 05:28:46 PM

Hey Dan,
Just installed a Dedenbear RTD-7 box and it makes the solenoid release appear "lazy"  once the entered delay time is reached?  With no delay the solenoid snaps in / out.

Title: Re: Transbrake Delay Box
Post by: masracingtd1167 on October 10, 2016, 08:05:01 AM

Something wrong there ! It should release just as quickly with or with out a delay .

Title: Re: Transbrake Delay Box
Post by: bikeguy307 on October 10, 2016, 09:37:25 AM

I would check to see if the solenoid is getting warm and sticking during the delay time, cause a lazy release, with no delay, and an extended hold on the button should cause the same result. If this is the result, suspect the solenoid.

Title: Re: Transbrake Delay Box
Post by: jspell on October 10, 2016, 03:23:30 PM

We used the delay box this past weekend for the first time during a time run...when I released the transbrake button the car left like it was in second gear...what is happening internally when the solenoid is lazy releasing?

Title: Re: Transbrake Delay Box
Post by: bikeguy307 on October 10, 2016, 06:59:39 PM

The reverse clutch drags on release this will cause the lazy leave.

Title: Re: Transbrake Delay Box
Post by: jspell on October 11, 2016, 04:43:26 AM

OK, makes sense...should I look for internal damage?  Because the car lost a tenth in the 60' (1.19) after 5 consecutive 1.09 passes prior to trying the delay box.  thanks Dan.

Title: Re: Transbrake Delay Box
Post by: bikeguy307 on October 11, 2016, 05:28:51 AM

 Did you run it after the one box pass? If so what was the 60ft. If the 60ft went back to normal without the box, I would say the hit did no damage. It is possible it started to glaze the reverse clutches, but I'm not thinking one hit would have done that.

Title: Re: Transbrake Delay Box
Post by: jspell on October 11, 2016, 05:34:11 AM

The pass after the lazy run resulted in a slow (slowest 60') car ever went....which was 1.19.  The weather was considerably better (693DA) which should have resulted in an even faster 60'.  Top speed seemed unaffected.

Title: Re: Transbrake Delay Box
Post by: bikeguy307 on October 11, 2016, 09:22:58 AM

I would pull the trans down and look at it just to be safe. Also I would swap solenoids the check it on the box.

Title: Re: Transbrake Delay Box
Post by: jspell on October 11, 2016, 11:02:43 AM

Thanks Dan.

Title: Re: Transbrake Delay Box
Post by: bikeguy307 on October 11, 2016, 06:05:40 PM

Keep me up on your findings.