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Re: 572 engine, PG or 727 trans?
[Re: AndyF]
#2977934
10/24/21 06:05 PM
10/24/21 06:05 PM
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Joined: Feb 2005
Posts: 20,160
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,160
PA.
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I’m going to say powerglide all the way BUT aftermarket case have been impossible to find. At least the ATI cases. I have three of them with gearsers ranging from 1.68-1.98 and we tried to order one for my son and they told me they probably wouldn’t have any this years. Jegs charged my card so I canceled the order. You may want to check to see what is available.
Last edited by pittsburghracer; 10/24/21 06:05 PM.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: 572 engine, PG or 727 trans?
[Re: AndyF]
#2977935
10/24/21 06:12 PM
10/24/21 06:12 PM
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Joined: Jan 2003
Posts: 2,915
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,915
A shed in England
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If it's light I'd go with a PG, if not I'd be leaning to a SFi case TH400 or something of that ilk. An SFi TH400 is something I've been considering for our car, re-certifying or replacing blankets/ shields etc is just a monumental PITA at the moment as no-one has stock. Also, I've no experience running a PG but I hear correct converter choice is paramount.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: 572 engine, PG or 727 trans?
[Re: AndyF]
#2977936
10/24/21 06:19 PM
10/24/21 06:19 PM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,923
NC
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I'm working with a race team who is putting a 572 inch wedge (Indy block and heads) into a B body race car. What kind of "B body race car?" Tube frame, back half, ladder bar, 4-link, weight ? Depending on weight and chassis., it could benefit from either one. But without more info, a 800 hp engine in a 3100 lb car with a good chassis would be a great bracket car with a PG and the right converter. A 750 hp engine in a 3400 lb car with a good chassis could work well with a 3-speed transmission.
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Re: 572 engine, PG or 727 trans?
[Re: AndyF]
#2977942
10/24/21 06:36 PM
10/24/21 06:36 PM
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Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
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I'm working with a race team who is putting a 572 inch wedge (Indy block and heads) into a B body race car. Trying to decide to go with a PG or stay with the 727. I'm leaning towards the PG since they have a couple of other cars with glides in them so they have PG spare parts. Also, the PG can be built with an aftermarket case which is SFI legal while the 727 requires a blanket or shield. I'm not sure which will be quicker down the track. They bracket race so they car about consistency more than ET. My guess is that the PG should work just fine behind the 572 and it might be a tad bit more consistent since it only has one gear change. I am a dyed in the wool fan of Torqflites', but in this case I would go glide if possible. A Torqueflite loses consistancy due to the first shift coming up real quick and too much starting line ratio. If they can't find a glide trans then I would run a rear gear like a 3.73 to reduce SLR to about 9.0 with the Torqueflite. I had to go to an airshifter on an RPM switch to get consistant times, and even with a well prepped track and 15x33 goodyears sometimes my 60 ft might vary by .01 or more.
Last edited by gregsdart; 10/24/21 06:38 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 572 engine, PG or 727 trans?
[Re: gregsdart]
#2977952
10/24/21 07:05 PM
10/24/21 07:05 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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My 572 runs a 727 with a 4.30 and 10.5 tires. It's done well in brackets and running index. This is the last time out. Couple of 60ft on the rear tire. First pass throttle pulled back. Last pass motor was wounded.
Doug
Last edited by dvw; 10/24/21 07:07 PM.
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Re: 572 engine, PG or 727 trans?
[Re: dvw]
#2977954
10/24/21 07:09 PM
10/24/21 07:09 PM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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My 572 runs a 727 with a 4.30 and 10.5 tires. It's done well in brackets and running index. This is the last time out. Couple of 60ft on the rear tire. First pass throttle pulled back. Last pass motor was wounded.
Doug I'm jealous  I wish we could get that many runs in one day out here in the west  Wait, maybe if I could go more than one round I could 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 engine, PG or 727 trans?
[Re: 440Jim]
#2977968
10/24/21 07:37 PM
10/24/21 07:37 PM
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Joined: Jan 2003
Posts: 30,995
Oregon
AndyF
OP
I Win
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OP
I Win
Joined: Jan 2003
Posts: 30,995
Oregon
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I'm working with a race team who is putting a 572 inch wedge (Indy block and heads) into a B body race car. What kind of "B body race car?" Tube frame, back half, ladder bar, 4-link, weight ? Depending on weight and chassis., it could benefit from either one. But without more info, a 800 hp engine in a 3100 lb car with a good chassis would be a great bracket car with a PG and the right converter. A 750 hp engine in a 3400 lb car with a good chassis could work well with a 3-speed transmission. It is a gasser type of car with ladder bars and big tires. The 572 should make around 900 hp but it hasn't been on the dyno yet. I'm not sure on the car weight, maybe 3300 with the new aluminum engine. I think the car has 3.89 gears in the rear right now but of course those can be changed. It currently runs 9.70 with an iron block 505 so they are looking to step up next season. The new 572 just arrived from Best so they are getting ready to swap engines over the winter.
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Re: 572 engine, PG or 727 trans?
[Re: Cab_Burge]
#2978184
10/25/21 12:27 PM
10/25/21 12:27 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,361
Las Vegas
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If its a bracket car then I would ALWAYS say a Glide, those who think weight matters to a glide need to buy a better glide. I personally have a Joels on Joy Proflite in my 3500+ lb Savoy and its been quite consistent as well but was not really built to bracket race so much. Ones less shift is one less opportunity for an issue.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: 572 engine, PG or 727 trans?
[Re: Al_Alguire]
#2978203
10/25/21 12:51 PM
10/25/21 12:51 PM
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Joined: Dec 2005
Posts: 11,530
Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,530
Fulton County, PA
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In that application,if they are serious, Glide.
Hate to say it but it"s like the old 9" vs. 8.75 or 60 debate. Glide has been developed and supported in the aftermarket so much more and offers so many advantages, it's a no brainer.
Converter development, options and availability, Cases. Parts. Gear ratios. Even the cost for a top shelf unit.
Buddy just put a 1.68 gear in an old 2400# ladder bar car with a 555. Made it much more manageable.
I love the Torqueflites, but if you're gonna race and not just play, you gotta use the right stuff. Watching The Million over the weekend. It's nasty out there.
Last edited by CMcAllister; 10/25/21 12:52 PM.
If the results don't match the theory, change the theory.
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Re: 572 engine, PG or 727 trans?
[Re: Al_Alguire]
#2978205
10/25/21 12:55 PM
10/25/21 12:55 PM
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Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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I like the idea of the “all new” trans built with all the components designed for the rigors of drag racing.
So, budget allowing...... a TH400 or PG based combo would be my choice.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: 572 engine, PG or 727 trans?
[Re: AndyF]
#2978213
10/25/21 01:18 PM
10/25/21 01:18 PM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,923
NC
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I'm leaning towards the PG since they have a couple of other cars with glides in them so they have PG spare parts. Also, the PG can be built with an aftermarket case which is SFI legal while the 727 requires a blanket or shield. I'm not sure which will be quicker down the track. They bracket race so they car about consistency more than ET. My guess is that the PG should work just fine behind the 572 and it might be a tad bit more consistent since it only has one gear change. 900 hp, 572 CID will have plenty of torque to get that car moving with a PG. I highly recommend the aftermarket case (with bell). All the guts should be aftermarket at that level, so there is some choice of 1st gear ratio. Like a straight cut 1.80 gear set. And the Turbo style input shaft with matching converter.
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Re: 572 engine, PG or 727 trans?
[Re: 69dart]
#2978239
10/25/21 02:04 PM
10/25/21 02:04 PM
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Joined: Jan 2003
Posts: 482
Marysville Wa
moparfan
mopar
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mopar
Joined: Jan 2003
Posts: 482
Marysville Wa
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I started out with a 727 in the challenger i had years ago. The car was 2640 with me in it. I had issues getting the car to repeat, i put a 2.28 low gear in the 727 which helped some. i ended up putting a 1.80 glide in it, the car picked up a tenth and was a good bracket car after the switch. the car had a 572 (572-13 head) etc. car ran the best of 8.24 @ 165 with 1.15 60'
2017 Challenger R/T Scat Pack Shaker
2021 T/A 392
1970 Challenger R/T 383,727, 3.55, (Wife's car)
1970 Challenger R/T SE 440-4, 4-speed, 4.10 Dana
1972 Dodge Demon 396 W-2,904, 4.30, 10.660 @ 125.85
2020 Hellcat redeye
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Re: 572 engine, PG or 727 trans?
[Re: FastmOp]
#2978245
10/25/21 02:16 PM
10/25/21 02:16 PM
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Joined: Feb 2005
Posts: 20,160
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,160
PA.
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It’s about time you got here. Aren’t you retired like most of us old timers. Lol 😂
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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