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Why not use 727 like a glide #624097 02/25/10 03:35 PM 02/25/10 03:35 PM
Joined: Jan 2004 Posts: 667 IL D Dart451 OP mopar
Dart451 OP mopar D Joined: Jan 2004 Posts: 667 IL	Was running some numbers around and was wondering why not use the first two gears on a 727 like a glide then third will be overdrive. The 727 1st 2.45 2nd 1.45 so 2.45/1.45=1.69 a glide is 1.76 first to second ratio I understand the extra drag on internal components and needed to get the convertor set up right. [image]https://board.moparts.org/ubbthreads/upload2/5829790-Glidevs727.tif[/image] 5829790-Glidevs727.jpg (95 downloads) Last edited by Dart451; 02/25/10 03:49 PM.

Re: Why not use 727 like a glide [Re: Dart451] #624098 02/25/10 03:46 PM 02/25/10 03:46 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	Quote: Was running some numbers around and was wondering why not use the first two gears on a 727 like a glide then third will be overdrive. The 727 1st 2.45 2nd 1.45 so 2.45/1.45=1.69 a glide is 1.76 first to second ratio I understand the extra drag on internal components and needed to get the convertor set up right. [image]https://board.moparts.org/ubbthreads/upload2/5829790-Glidevs727.tif[/image] The whole idea of going to a glide is to get away from the low 1st gear. Im not following you on the OD thing. The only two gears between them that are actually the same is the ones your not wanting to use LOL.. High and 3rd are the same. Both are a 1:1 [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Why not use 727 like a glide [Re: Bob_Coomer] #624099 02/25/10 03:51 PM 02/25/10 03:51 PM
Joined: Jan 2004 Posts: 667 IL D Dart451 OP mopar
Dart451 OP mopar D Joined: Jan 2004 Posts: 667 IL	I want to use a 3.23 or 2.76 rear gear and run 1/4 using first and second only. So I will finish at the strip in second.

Re: Why not use 727 like a glide [Re: Dart451] #624100 02/25/10 03:59 PM 02/25/10 03:59 PM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	Quote: I want to use a 3.23 or 2.76 rear gear and run 1/4 using first and second only. So I will finish at the strip in second. THERE 'ya go ! ... ... been doin' THIS furr years !

Re: Why not use 727 like a glide [Re: BeEtLeJuIcE !] #624101 02/25/10 04:35 PM 02/25/10 04:35 PM
Joined: Apr 2007 Posts: 325 Greenville, WI B Big B enthusiast
Big B enthusiast B Joined: Apr 2007 Posts: 325 Greenville, WI	Joe at Tranzact sells a 2 speed 727. This would be much cheaper then converting over to a PG, if your car already has a 727

Re: Why not use 727 like a glide [Re: Big B] #624102 02/25/10 04:46 PM 02/25/10 04:46 PM
Joined: Jan 2004 Posts: 667 IL D Dart451 OP mopar
Dart451 OP mopar D Joined: Jan 2004 Posts: 667 IL	Not about wanting a two speed as wanting to drive the car down the highway. I already have a well built 727, so if the convertor is redone, and change the rear gears it would be alot cheaper then a overdrive. Looking for why this would be a bad idea?

Re: Why not use 727 like a glide [Re: Dart451] #624103 02/25/10 05:05 PM 02/25/10 05:05 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Why not?? It will work.

Re: Why not use 727 like a glide [Re: Dodgem] #624104 02/25/10 05:16 PM 02/25/10 05:16 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	why not? with the right converter, you prolly wouldn't lose much. i do it in the eighth. for what is the good life if not doing things thoughtfully?

Re: Why not use 727 like a glide [Re: maximum entropy] #624105 02/25/10 07:39 PM 02/25/10 07:39 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: why not? with the right converter, you prolly wouldn't lose much. i do it in the eighth. 100%.......Everyone wants an overdrive or Gear Vendors , but a 727 with a decent converter (3,800 and up) is JUST as driveable as an OD and will run VERY well at the strip.....been there, done that MANY times....... Wayne

Re: Why not use 727 like a glide #624106 02/25/10 08:54 PM 02/25/10 08:54 PM
Joined: Jan 2004 Posts: 667 IL D Dart451 OP mopar
Dart451 OP mopar D Joined: Jan 2004 Posts: 667 IL	Never seen much posted about it, so figured I was missing something. Think I will start looking for a new rear gear.

Re: Why not use 727 like a glide [Re: Dart451] #624107 02/25/10 09:25 PM 02/25/10 09:25 PM
Joined: Jan 2003 Posts: 25,817 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,817 Rio Linda, CA	Back in the early seventies some nitro funny cars used 1st and 2nd gear in the 727 with 2.76 rear end gears. Top gear was close to the 3.91's everybody was running then. The INTERNET, the MISinformation superhighway

Re: Why not use 727 like a glide [Re: John_Kunkel] #624108 02/26/10 11:40 AM 02/26/10 11:40 AM
Joined: Dec 2006 Posts: 235 Tucson AZ. RADAMX enthusiast
RADAMX enthusiast Joined: Dec 2006 Posts: 235 Tucson AZ.	I would think the glide would have a lot less drag and would weigh less. so in a light car the glide would be better at the strip. I still have a heavy car so I need the lower first gear of the 727. I run a 3.89 gear and 28 inch tall tires been thinking about going with 3.55's in a attempt to use the torque of the nitrous motor..

Re: Why not use 727 like a glide [Re: RADAMX] #624109 02/26/10 12:13 PM 02/26/10 12:13 PM
Joined: Mar 2003 Posts: 2,507 PA moparacer master
moparacer master Joined: Mar 2003 Posts: 2,507 PA	It wont be "like a glide" because you will be using the planetary in 1st and 2nd gear. Wont have the true 1:1 ratio. 67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174

Re: Why not use 727 like a glide [Re: moparacer] #624110 02/26/10 12:20 PM 02/26/10 12:20 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	i don't think the op is worried about absolute maximum efficiency, and neither am i. these are street cars, and after a long weekend of racing, NOTHING is finer than hitting the highway home and snicking that baby into "top cog". too bad i have a dana 60, or i'd put 2.71's in it! for what is the good life if not doing things thoughtfully?

Re: Why not use 727 like a glide [Re: maximum entropy] #624111 02/26/10 01:03 PM 02/26/10 01:03 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	One problem would be that you wouldnt have a trans brake.... if you use one

Re: Why not use 727 like a glide [Re: MR_P_BODY] #624112 02/26/10 03:29 PM 02/26/10 03:29 PM
Joined: Jan 2004 Posts: 667 IL D Dart451 OP mopar
Dart451 OP mopar D Joined: Jan 2004 Posts: 667 IL	I already have a trans brake why couldn't i use it?

Re: Why not use 727 like a glide [Re: Dart451] #624113 02/26/10 03:31 PM 02/26/10 03:31 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	i would. for what is the good life if not doing things thoughtfully?

Re: Why not use 727 like a glide [Re: maximum entropy] #624114 02/26/10 04:20 PM 02/26/10 04:20 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	Quote: i don't think the op is worried about absolute maximum efficiency, and neither am i. these are street cars, and after a long weekend of racing, NOTHING is finer than hitting the highway home and snicking that baby into "top cog". too bad i have a dana 60, or i'd put 2.71's in it! Thats what i dont under stand with the OP... neither the the 727 or the PG has is OverDriven in 3rd? Were is the OD you guys keep talking about? They both have a final drive a 1:1 In this case a A518 would be optional.. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Why not use 727 like a glide [Re: Bob_Coomer] #624115 02/26/10 04:39 PM 02/26/10 04:39 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	Quote: Quote: i don't think the op is worried about absolute maximum efficiency, and neither am i. these are street cars, and after a long weekend of racing, NOTHING is finer than hitting the highway home and snicking that baby into "top cog". too bad i have a dana 60, or i'd put 2.71's in it! Thats what i dont under stand with the OP... neither the the 727 or the PG has is OverDriven in 3rd? Were is the OD you guys keep talking about? They both have a final drive a 1:1 In this case a A518 would be optional.. no, it would not "actually" be overdrive, but the overall ratio would be as if it were overdriven, capice? yer making a very simple concept into something complicated. for what is the good life if not doing things thoughtfully?

Re: Why not use 727 like a glide [Re: Dart451] #624116 02/26/10 04:48 PM 02/26/10 04:48 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	Quote: I want to use a 3.23 or 2.76 rear gear and run 1/4 using first and second only. So I will finish at the strip in second. when i first got into racing with my 'cuda, with the 3.23 gears & tweaked stock converter, i'd be changing into 3rd as i crossed the stripe. i think i ran 275x60 quicktimes with that combo. isn't this where you want to be?

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