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DRR Pro |
I'm used to running a powerglide in my FED, however, when I begin the door car build, I was told it might be in my best interest to look into a TH400 for the extra gear. I know the TH400 eats a ton of power so I'm concerned that will slow the car more than I'd like. I may use the car for some S/G stuff from time to time so would this play in your decision to go 2 speed? Multi-time First round runner up extraordinaire | ||
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DRR S/Pro |
What will the car weigh? 272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60' 2017 Bradenton Heads Up Madness Open Outlaw Champ 2018 PDRA T/D #5 2019 PDRA T/D #2 2020 Retired From T/D Competition.... 2020 Bradenton NMCA Hemi Shootout Winner 2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass. | |||
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<DOTracer> |
My car is quicker with the 3 speed. I would say the decision will come down to budget and what first gear ration you feel will best suit the combination. | ||
DRR Pro |
Wallace, give us some details about your build up. Weight, power, expected performance. Larry Woodfin | |||
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DRR Pro |
If deciding to go th400 consider installing one that the brake works in both 1st and 2nd gear. I’ve looked at several this year and have decided to use Hipsters new 22748-1A from ATD. | |||
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DRR Top Comp |
On my Camaro at 2900 Lbs the car was faster and more consistent when I went to powerglide. It lost a little in the 60foot but made up for it later down track. One other thing with the T-400 the car would often do big wheel stands and pop tires out of the beams for a red light. Powerglide calmed it down a lot with out hurting ET. T-400 was more fun to drive but went more rounds with the glide. 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 | |||
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DRR S/Pro |
Even with the weight the 400 is .05 quicker and with a better 3 speed... maybe a dime. 5 years ago ( Firebird)...We tested the Coan xlt against Hughes glide back to back same day (1 hour), it was .04-.05. Same speed, same converter. The glide first gear 1.80, 400 was 2.10. If my memory is correct right at 40 lbs diff. You might consider a Pro Trans if you have the money. 2000 Firebird TS Ness car 2390 # 632 Cu In Yes the glide is more consistent. California Screaming! Raceless in California! | |||
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DRR S/Pro |
I'd stick with the glide regardless of which performed better as far as ET. Tony Leonard | |||
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DRR Pro |
Thanks guys. I dont have the new car in my possession yet so I can't answer well enough to be helpful. If I were to guess, it should be around 2500#, will have my stack injected 470" that makes my 1700# fed run 8.40's in 6000'+ DA air. The new car has 4.10 gears and I'm not sure tire size yet. However, I'll update once I have the car in my garage. Need to finish the season with my old heap first. Thank you! Multi-time First round runner up extraordinaire | |||
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DRR Pro |
I like my glide. Slightly less torque multiplication off the line with the 1.76 first gear compared to a 3 speed but with only 1 shift point, it increases consistency. When track conditions are very good, I can still put the car on the back bumper. I'd hate to see what it would do with a 3 speed and a lower first gear. Downside of using a glide is that you're in a gear for a longer period of time so your rpm range in each gear is a little longer. If you need to keep your rpm in a smaller range while going down the track, then more gears should be used. I shift at 7400 and it only drops back to around 6400 after the shift. You can also convert a glide to be high gear only. A high HP car should provide more than enough torque to get you moving and with no shift points, consistency should improve. Another advantage of a glide is axle size. With less torque multiplication off the line, larger, heavier axles are not required. I run 31 spline Moser axles. When I installed them, I painted a line down the axles. Years later when I pulled them to fix a leak, the lines and splines were still straight. If I went with a 3 speed, I would need 33 or 35 spline axles because of the increased launch torque. | |||
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