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#1
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Have always run 727's racing BB or SB I'm faced with a weight situation where I can't use fibregless or remove anymore body parts or accessories to remove weight without violation of class rules. My easiest option to remove weight is a 904 or a Powerglide. Trans builders lean toward the PG conversion w/more weight lose & definite ET improvement.
The 727 has always been very durable. I'm now running 69 Dart 340 combo & 68 Cuda 390 stoked SB 3350lbs. Use small shot nitrous 200 hp Presently running 9.80's w/340 the 390 setup is being assembled & our disicion pending. Any experiences with this dilemma? Would appreciate anyones opinion or recommendation. Vance ------------------ |
#2
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I'm currently building a '74 duster 360 w/ a 727 trans.for the 1/8th mile. It originally had a 904 behind it. It is a piece of junk. It was hard to find parts for and they were very expensive. If I were you, I would go with the Powerglide, if you want to reduce weight. It is a sturdy transmission.
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#3
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The 904's are a good light weight race trans and besides that they can hold up to 500 hp built right and the low gear set is much cheaper than a low gear set for a 727.
I have a friend with a 6.90 in the 1/8 360 68 cuda with a 904. The rotating weight in the 904 is lighter so frees up HP and the complete assembly is lighter so all in all a win win situation. Christian ------------------ 68 'Cuda 383 Working on adding EFI 69 'Cuda Race Parts Car 76 Duster 273 recent transplant 95 Neon 2.0 SOHC best of 16.96 84 Dodge Ram D50 transplanting 360 [This message has been edited by ChristianCuda (edited April 18, 2000).] |
#4
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If your car was say a tube frame Daytona/Avenger etc.,I'd say use a 'glide and cautiously saying that.Your car weight is too heavy for a glide,and frankly a glide is becoming outdated as well.The hot setup is the 904 TorqueFlite.A bunch of the NHRA comp. eliminator racers use the 904,whether it's behind a Chevy,Ford or whatever.This trans was developed by Marv Ripes of A-1 Transmissions and is called the A-1 "ProFlite" and uses a adapter to mate it with a non Mopar engine.Very strong and works real well.The 904 is what you need.It's 1.5 tenths quicker than a 727 in the 1/4 mile too.
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#5
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To make your decision, you also need to take into account what size tire you are going to be running. Small engines in heavy cars do not like glides, period. Glides work best in very light big cubic inch cars. They can get up into the power band very quickly and they let the engine lay on the converter.
First, it is going to cost around $600 just to bolt the glide behind you engine, so figure out if that money would be better spent somewhere else. If you are severely tire limited, the glide may work because it will take some hit off of the tires, other wise, torque is what accelerates you car, and gear multiplication is torque. You decide what is going to go faster, a 1.72 first gear or a 2.45 or even 2.74 first gear? If you have ever notice, none of the first to the finish line wins classes uses a glide. Comp Eliminator cars are all 3, 4 or 5 speed cars. The 904 is a decent transmission. I ran one for years and never had a problem. I am in fact building a new one to put behind my new engine and car combo. A friend of mine runs them in 2 of his cars, both super gas small blocks. You do, however, have to take some chances with them. The converters do not have killer sprags in them and sometimes they do break. I personally doubt that you would see an ET improvement with a glide. With nitrous it might be close to the same, but on engine only, I think you would actually be slower. Same friends I talked about above tried a glide in thier super gas challenger. They had a converter sponsor and tried 9 different converters. It would not cut a pro light and the best converter was 3 tenths slower than the 904. |
#6
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go with the 904 it is as strong as the glide and quicker than the 727 or the glide
if you think you need a glide you also need a junkerlay sounds to me like christian cuda christopher and comp chassis have the right answers |
#7
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It all depends on what you are running,a heavy car wants a 727 cause it will live as long time in a heavy braket car.I uae a JW Glide in my 540 ci S/Gas Aries K because with me in car it is only 2500 lbs. With a glide it only makes 1 shift for better ET.
------------------ One owner 1965 HEMI Car S/Pro Aries K Car |
#8
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See if you can find an A999 torqueflite in a cordoba, mirada..etc. they have a deeper first gear and the same case as an a904
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#9
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Make sure you use a valve body that uses a low band apply whether its a trans brake unit or not. If the case has a questionable overrunning clutch cam, keep looking for another case. Do not use the repair bolt in cam. Its a failure in the making. My opinion. I tend to agree that big motor, high torque tends to make the staring line ratios of the glide work best. I think you will be surprised how much torque increase the 390 will have. Its a close call. Let us know how it works, regardless of your decision. Good luck.
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#10
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Joe Chrisman from Tranzact has a 727 in his 572cid 18/71 blown 99 Dakota. This little truck weigh considerably less than 3000lbs. His 60ft times are in the 1.00s. By using the lower first gear of a 3 speed, you can use much less converter. High stall converters generate lots of heat and heat kills trannies. Here is a guy with not much good to say about glides. Well, they are from Chevrolet. He even went so far as to say the big Torque Flite can out perform the 2 speed in a rail or altered. You might give him a call and get an education and an ear full, he has a definite opinion where to stick a "Glide" . (317)-846-4933
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