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Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051116
08/12/11 08:07 PM
08/12/11 08:07 PM
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
Eric Offline
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Eric  Offline
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Pittsburgh PA
Quote:

The powerglide WILL slow you down, mabey a good or bad thing (I always thought the point of raceing was to go fast ).

The power glide is cheaper, until you have to go through a dozen converters and 1st gear ratio swaps to get it nearly as fast as the 727.

Just don't run a valve body without LBA and the 727 is bullet proof. You will probalby even be able to run a higher gear at the start line unless you are running 1/8th mile. The only reason a glide should be mentioned on a mopar site is by the guys who like to no other reason to recomend one on here




I run a glide in a 2300# race weight car....when it had a 727 it would stand on the bumper. 1.76 gear and a UCC converter. Being a class racer and bracket racer I could care less what the 60ft is as long as it repeats


5.53 @ 125 1/8th on the launch control..more left in her!

Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051117
08/12/11 08:30 PM
08/12/11 08:30 PM
Joined: Dec 2006
Posts: 3,667
Arizona
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Chris'sBarracuda Offline
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Arizona
Quote:

The powerglide WILL slow you down, maybe a good or bad thing (I always thought the point of racing was to go fast ).

The power glide is cheaper, until you have to go through a dozen converters and 1st gear ratio swaps to get it nearly as fast as the 727.

Just don't run a valve body without LBA and the 727 is bullet proof. You will probably even be able to run a higher gear at the start line unless you are running 1/8th mile. The only reason a glide should be mentioned on a mopar site is by the guys who like to no other reason to recommend one on here






Too bad Monte doesn't post here anymore.. He would strongly disagree, as do I..


Chris..

Re: 727 or POWERGLIDE???? [Re: Chris'sBarracuda] #1051118
08/12/11 09:51 PM
08/12/11 09:51 PM
Joined: Jul 2009
Posts: 694
Michigan
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Super Scamp Offline
mopar
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Michigan
Quote:

Quote:

The powerglide WILL slow you down, maybe a good or bad thing (I always thought the point of racing was to go fast ).

The power glide is cheaper, until you have to go through a dozen converters and 1st gear ratio swaps to get it nearly as fast as the 727.

Just don't run a valve body without LBA and the 727 is bullet proof. You will probably even be able to run a higher gear at the start line unless you are running 1/8th mile. The only reason a glide should be mentioned on a mopar site is by the guys who like to no other reason to recommend one on here






Too bad Monte doesn't post here anymore.. He would strongly disagree, as do I..


Chris..




The Power Glide did not slow me down I just keep getting faster and faster.. Consistent is the word . I don't even have to hold a # just run her out the back door..

6775761-lily011.JPG (74 downloads)

Just One Man's Opinion Mopar Mafia Racing
Re: 727 or POWERGLIDE???? [Re: Super Scamp] #1051119
08/12/11 10:07 PM
08/12/11 10:07 PM
Joined: Jan 2007
Posts: 728
mi usa
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old yeller Offline
super stock
old yeller  Offline
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mi usa
You people crack me up...you act like GM trannys don,t blow up...a power glide will give you more mph..but mph doesn,t win races. a turbo 400 will rob you of 50 hp over a turbo 350,I have known of a few people that went GM and came back...as far as you brkt racer dudes go, only shifting once is a good thing.

Re: 727 or POWERGLIDE???? [Re: Eric] #1051120
08/12/11 10:53 PM
08/12/11 10:53 PM
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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HotRodDave Offline
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Kalispell Mt.
The only reason people have "too violent of a launch" with a 727 is because they run too low of a rear gear, they blame the trans when it was there own choice of rear gear that made too much tq at the rear tires during the launch.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 727 or POWERGLIDE???? [Re: Super Scamp] #1051121
08/12/11 10:58 PM
08/12/11 10:58 PM
Joined: Jan 2007
Posts: 728
mi usa
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old yeller Offline
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mi usa
Quote:

Quote:

Quote:

The powerglide WILL slow you down, maybe a good or bad thing (I always thought the point of racing was to go fast ).

The power glide is cheaper, until you have to go through a dozen converters and 1st gear ratio swaps to get it nearly as fast as the 727.

Just don't run a valve body without LBA and the 727 is bullet proof. You will probably even be able to run a higher gear at the start line unless you are running 1/8th mile. The only reason a glide should be mentioned on a mopar site is by the guys who like to no other reason to recommend one on here






Too bad Monte doesn't post here anymore.. He would strongly disagree, as do I..


Chris..




The Power Glide did not slow me down I just keep getting faster and faster.. Consistent is the word . I don't even have to hold a # just run her out the back door..


Dude, could you put a bigger tire on that A body car?

Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051122
08/12/11 10:59 PM
08/12/11 10:59 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Quote:

The only reason people have "too violent of a launch" with a 727 is because they run too low of a rear gear, they blame the trans when it was there own choice of rear gear that made too much tq at the rear tires during the launch.




you set the gear for the max rpm that you want
to run

Re: 727 or POWERGLIDE???? [Re: MR_P_BODY] #1051123
08/13/11 04:56 AM
08/13/11 04:56 AM
Joined: Jun 2005
Posts: 793
Utah
topbrent Offline
super stock
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Posts: 793
Utah
Quote:

MR_P_BODY

you set the [rear] gear for the max rpm that you want to run





^^^^ THIS

.

To MrPBody's good advice, I would add only this:
- First order of business is you gotta get the converter right.

Regardless of transmission choice, you have to get the engine into its optimal power producing range and keep it there through the shifts.
Too tight of a converter will not let the engine rev up quickly and at the shifts it will pull the engine down below that optimal power range which will just simply rob you of ET.

It is said that converter choice is more critical with a powerglide due to 1 less gear and the missing torque multiplication, but if you have the wrong converter in a 727/904 you are also just as likely to go slow.

Re: 727 or POWERGLIDE???? [Re: topbrent] #1051124
08/13/11 12:16 PM
08/13/11 12:16 PM
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Posts: 12,424
Kalispell Mt.
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HotRodDave Offline
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Kalispell Mt.
Quote:

Quote:

MR_P_BODY

you set the [rear] gear for the max rpm that you want to run





^^^^ THIS

.

To MrPBody's good advice, I would add only this:
- First order of business is you gotta get the converter right.

Regardless of transmission choice, you have to get the engine into its optimal power producing range and keep it there through the shifts.
Too tight of a converter will not let the engine rev up quickly and at the shifts it will pull the engine down below that optimal power range which will just simply rob you of ET.

It is said that converter choice is more critical with a powerglide due to 1 less gear and the missing torque multiplication, but if you have the wrong converter in a 727/904 you are also just as likely to go slow.





Since the gears are closer together in a 727 you are gonna loose less RPM between gear changes and the converter becomes slightly less critical because the gears are keeping it in the sweet RPM range instead of a slipping converter, so you are LESS likely to go slow with the wrong converter. As for keeping it in the right RPM range at the top end of the track, most guys with glides are way past the sweet spot in the RPM range when they cross the stripe, they have to compromise the top end to improve the launch.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051125
08/13/11 12:56 PM
08/13/11 12:56 PM
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi Offline
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Lehigh Acres, Florida
Quote:

The powerglide WILL slow you down, mabey a good or bad thing (I always thought the point of raceing was to go fast ).

The power glide is cheaper, until you have to go through a dozen converters and 1st gear ratio swaps to get it nearly as fast as the 727.

Just don't run a valve body without LBA and the 727 is bullet proof. You will probalby even be able to run a higher gear at the start line unless you are running 1/8th mile. The only reason a glide should be mentioned on a mopar site is by the guys who like to no other reason to recomend one on here




Dave contact: John Urist, Chip Havemann, Sean Lyon, Kieth Szabo....the list goes on and please tell them they are doing it wrong by running glides

Note....this is just a point....nothing personal

Rickster

Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051126
08/13/11 01:39 PM
08/13/11 01:39 PM
Joined: Nov 2003
Posts: 3,461
Dandridge TN
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Dabee Offline
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Dandridge TN
Quote:

As for keeping it in the right RPM range at the top end of the track, most guys with glides are way past the sweet spot in the RPM range when they cross the stripe, they have to compromise the top end to improve the launch.






I totally disagree. I run a glide in both my RED and door car and both cars cross the stripe in the sweet spot with out compromising the launch. Look at my signature picture and tell me again I’m doing something wrong.

Re: 727 or POWERGLIDE???? [Re: Super Scamp] #1051127
08/13/11 01:43 PM
08/13/11 01:43 PM
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Posts: 2,177
ill
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dennismopar73 Offline
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ill
it depends , weight of car biggest deal
a 727 built stock will run in 9.90 easy just valve body change,
power glide, spend money please

Re: 727 or POWERGLIDE???? [Re: dennismopar73] #1051128
08/13/11 02:35 PM
08/13/11 02:35 PM
Joined: May 2003
Posts: 13,202
aZLiViN
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J_BODY Offline
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aZLiViN
GM powered Comp Eliminator cars with 904's in them...

Re: 727 or POWERGLIDE???? [Re: dennismopar73] #1051129
08/13/11 02:42 PM
08/13/11 02:42 PM
Joined: Jun 2010
Posts: 469
Tennessee
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steeldust Offline
mopar
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Joined: Jun 2010
Posts: 469
Tennessee
I am a MOPAR guy 100% i run a 727 and it works great the brake works great but it`s not all MOPAR parts and in side my 572 motor are not MOPAR parts if you love going fast and racing you have to use after market parts and if you think a glide will slow you down just go to some races and see what`s in most all fast cars around here in all the outlaw 10.5 & even in my 6.0 class you will see glides in BRADS 1970 DUSTER when he run 6s he went to a glide and he did not slow down and now he runs in the 4s and they both cost you to go fast or real fast.

Re: 727 or POWERGLIDE???? [Re: steeldust] #1051130
08/13/11 02:58 PM
08/13/11 02:58 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Either trans has its good and bad points... myself
I dont like a 2 speed in a heavy car... I like the
lower ratio and the added gear but if I want to calm
down a launch I would surely go with a 2 speed... you
can kill EITHER trans with the wrong converter...I
have a brand new glide sitting in the shop with a JW
bell for a BB thats going to go up for sale(only reason
is I sold off most of my BB stuff and dont need it)

Re: 727 or POWERGLIDE???? [Re: MR_P_BODY] #1051131
08/13/11 03:22 PM
08/13/11 03:22 PM
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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HotRodDave Offline
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Kalispell Mt.
Almost every time someone posts how they drive there glide car they say something like they shift at 6000 and cross the line at 7000, the fact in MOST cases is they shift right when they should and cross the line significantly past that same RPM how can the sweet spot be so different from one shift to the next? The truth is it is not and another gear near the finish line would allow MOST cars to accelerate even more before the finish line. All the car cares about at the starting line is the TQ multiplication, a 727 with a 3.23 gear is gonna launch with the same starting lin tq as a glide with a 1.74 1st and 4.56 gear, it is not rocket science, run the right gear to tame the launch and you can still shift at the top end when MOST cars need to. The problem is most guys want to brag about haveing a 4.56 gear, makes up for small .... syndrome, I mean who wants to show up with a hot drag car and tell every one they have a 3.23 gear?

The only worthwhile argument for the glide is that it is a simpler trans. Of course you lose that argument when you have to run adapters and stuff to make it bolt to your motor and car.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051132
08/13/11 04:57 PM
08/13/11 04:57 PM
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi Offline
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rickstershemi  Offline
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Posts: 9,366
Lehigh Acres, Florida
Quote:

Almost every time someone posts how they drive there glide car they say something like they shift at 6000 and cross the line at 7000, the fact in MOST cases is they shift right when they should and cross the line significantly past that same RPM how can the sweet spot be so different from one shift to the next? The truth is it is not and another gear near the finish line would allow MOST cars to accelerate even more before the finish line. All the car cares about at the starting line is the TQ multiplication, a 727 with a 3.23 gear is gonna launch with the same starting lin tq as a glide with a 1.74 1st and 4.56 gear, it is not rocket science, run the right gear to tame the launch and you can still shift at the top end when MOST cars need to. The problem is most guys want to brag about haveing a 4.56 gear, makes up for small .... syndrome, I mean who wants to show up with a hot drag car and tell every one they have a 3.23 gear?

The only worthwhile argument for the glide is that it is a simpler trans. Of course you lose that argument when you have to run adapters and stuff to make it bolt to your motor and car.




Dave maybe you should build yourself a time machine that can take you back to the 60's & 70's and then maybe your argument would be valid

I shifted my glide at 7200 and crossed the stripe at 7500 7.90's - 8.0's didn't need a 3rd gear

Rickster

Re: 727 or POWERGLIDE???? [Re: rickstershemi] #1051133
08/13/11 06:37 PM
08/13/11 06:37 PM
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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HotRodDave Offline
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HotRodDave  Offline
I Live Here
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Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
Quote:

Quote:

Almost every time someone posts how they drive there glide car they say something like they shift at 6000 and cross the line at 7000, the fact in MOST cases is they shift right when they should and cross the line significantly past that same RPM how can the sweet spot be so different from one shift to the next? The truth is it is not and another gear near the finish line would allow MOST cars to accelerate even more before the finish line. All the car cares about at the starting line is the TQ multiplication, a 727 with a 3.23 gear is gonna launch with the same starting lin tq as a glide with a 1.74 1st and 4.56 gear, it is not rocket science, run the right gear to tame the launch and you can still shift at the top end when MOST cars need to. The problem is most guys want to brag about haveing a 4.56 gear, makes up for small .... syndrome, I mean who wants to show up with a hot drag car and tell every one they have a 3.23 gear?

The only worthwhile argument for the glide is that it is a simpler trans. Of course you lose that argument when you have to run adapters and stuff to make it bolt to your motor and car.




Dave maybe you should build yourself a time machine that can take you back to the 60's & 70's and then maybe your argument would be valid

I shifted my glide at 7200 and crossed the stripe at 7500 7.90's - 8.0's didn't need a 3rd gear

Rickster




You are only proveing my point crossing the line higher RPM than your shift point, not as big a differance as most but still proveing my point


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 727 or POWERGLIDE???? [Re: HotRodDave] #1051134
08/14/11 04:41 AM
08/14/11 04:41 AM
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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MoparBilly Offline
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Phoenix, AZ
Dave,
One point you are missing in your comparison is the converter.
While the choice seems to be more crtical with a Glide, the glide has much better choices. Converter technology, development and size,(THICKNESS) all favor the glide user.

The shallow bellhousing of a 727/904 limit converter choice in those areas, so the extra gear isn't as much of an advantage.

My 3000 lb A body with a small block, small system, and drag radials has a low gear set 904, and just went from a 9inch turbo action to an 8inch J&W. My 2800 lb. Chally with a big block, big system and 14.5 X 32's has a glide that's seen 2 different gear sets, and 3 different converters. I've spent more money in half the passes on the 904.

6777436-IMAGE0005.JPG (66 downloads)

"Livin' in a powder keg and givin' off sparks" 4 Street cars, 5 Race engines
Re: 727 or POWERGLIDE???? [Re: MoparBilly] #1051135
08/14/11 08:38 AM
08/14/11 08:38 AM
Joined: Dec 2006
Posts: 488
Charleston, SC
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SCDaytona Offline
mopar
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Posts: 488
Charleston, SC
Back to the original poster, please provide details about the car. HP is only one factor. Also, if your car is heavy, I would take Leon's advice as he has done what you are trying to do with a heavy car and more power than you have on 10" tires.

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