DRR Elite
| My 3200 lb. Firebird with the same HP slowed down. Also went from an 8" converter to a 9" converter |
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DRR Elite
| my 4.86 rear gear remained the same as it was with the turbo400. |
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DRR Pro
| quote: Just a general question about going from a Turbo 400 to a Power Glide. Basic 2900 to 3200 pound bracket car. basic 540/565 BBC making around 900/950 HP. Basic ET should be 5.60 to 5.80 in the 1/8 mile. Will it pick up ET/MPH or slow down, or stay the same.
What diff gear now? What first gear ratio in new glide? |
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DRR Top Comp
| My 67 Camaro ran a little faster with Glide. Lost a few in the 60 foot but made it up and more by finish line. And it was more consistent with the glide and much smaller wheelies. 14x32 -4.88 BBC with 8" converter. I did not change rear gears or converter when I swapped from T-400 to Powerglide. https://postimg.cc/gallery/np3zpruo/"Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion |
| Posts: 4278 | Location: United States of Texas | Registered: April 02, 2011 |
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DRR Elite
| your '67 Camaro was a cutup shytbox altered with a small block NOT a quote: 2900 to 3200 pound bracket car.
and did NOT have a quote: 540/565 BBC making around 900/950 HP.
nor did it run quote: 5.60 to 5.80 in the 1/8 mile.
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DRR Elite
| As I have proven recently and in the past on my other cars, removing as much as 40 lbs. shows nothing on the time slip with our cars. |
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DRR Pro
| quote: Originally posted by 1320racer: As I have proven recently and in the past on my other cars, removing as much as 40 lbs. shows nothing on the time slip with our cars.
Ed, in the Firebird racing SST, does it shift the 1-2 during the throttle stop time? If yes, what time does timer start after launch? With a glide, it is spinning considerably less internal rotating weight than a th400 and could increase the mph. |
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DRR Elite
| Fern, I've seen that for over 30 years on GM F and A body cars. |
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DRR Elite
| 99.9% of bracket racers won’t spend the coin. |
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DRR Pro
| Something to consider. I build all three trans. from time to time for various projects. [Powerglide, 350, & 400] *The Powerglide is lighter by around 20 + pounds. *The Powerglide has less rotating drag. *A properly build Powerglide is basically trouble free. *The Powerglide is a proven, consistent package. *It does depend on your combination/setup as to whether or not the Powerglide is faster. However, it is a proven winner. This is not intended to take away from a 400 trans, just giving my thoughts and experience.
Larry Woodfin
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| Posts: 1871 | Location: Kilgore TX | Registered: March 12, 2004 |
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DRR Elite
| quote: Originally posted by Larry Woodfin:
*The Powerglide is lighter by around 20 + pounds. I agree but not worth anything on the time slip.*The Powerglide has less rotating drag. I agree but not worth anything on the time slip*A properly build Powerglide is basically trouble free. I agree but so is a turbo400*The Powerglide is a proven, consistent package. I agree but so is a turbo400*It does depend on your combination/setup as to whether or not the Powerglide is faster. I disagree for the car in question as well the typical back halved, big tire bracket door car.However, it is a proven winner. I agree but so is the turbo400 |
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DRR Pro
| The OP never stated if/ what the goal (faster, consistent, both) was.
If more consistency is desired and presently th400 with stock (2.48/1.48) planetary, consider installing a 1+2 TB VB and leave in second gear. |
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DRR Sportsman
| I switched from a T400 to a 1.7PG many years ago with a SBC around 3100lbs Chevelle running 10s so not exactly comparable, but with the first pass I thought I broke something! Definitely boring compared to what I was used to. Car ran same ET +/- .01 but MPH was up 1 MPH for my car. Didn't change rear,tires or converter. Both transmissions were bought from ATI with TB. Wish I could buy the T400 back for the $750 I sold it for years ago to have fun again. |
| Posts: 622 | Location: Atco, NJ | Registered: March 14, 2002 |
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DRR Sportsman
| quote: Originally posted by 1320racer: As I have proven recently and in the past on my other cars, removing as much as 40 lbs. shows nothing on the time slip with our cars.
Just to add to 1320s quote above, on a slower car , weight does make a difference. I ran an index before and used weight for hitting the number. I took out 10 pounds and hit the index 000.after being .010 above. The weight always worked for me. You have to place or subtract weight in the right position in the car. Weight over the suspension crossmember or weight in the trunk of a a door car is different than in the front end of a dragster. Dragster doesn't care as much. |
| Posts: 622 | Location: Atco, NJ | Registered: March 14, 2002 |
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