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Re: What's too heavy for a Powerglide?
[Re: n20mstr]
#2893429
02/26/21 03:48 PM
02/26/21 03:48 PM
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Joined: Mar 2008
Posts: 292
NY
challenger451ci
OP
enthusiast
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OP
enthusiast
Joined: Mar 2008
Posts: 292
NY
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Thanks for all the replies! I have a second gear leave CRT valve body that I had some issues with the 2-3 shift. It would drive right through the converter on the sauce on the shift(dropped ~500-600rpm). I put an A&A in and the shift drop is now ~800-900rpm on the sauce. Its been back to CRT for a change, but I haven't put it back in. Maybe I'll try leaving in 2nd and see if it likes it before going through the work of changing to a glide or TH400. I think the car needs about a 4.30 to make the 1/8th depending on converter slip. If Brad Watt can leave on a prepped track and not kill the 727, I think I'll be OK! I know that car makes a ton more power than my hoagie. Part of the reason for making the change is for durability.
I know when I made the change to the taller 2.28 low gear and 3.73's(8.5SLR), it made things much easier for power management. I need to be able to leave on a dirt road and generally can now, but I have to take a TON of power out to get it to leave.
You are right, Tony....I need a bigger jet! It has a 0.030n jet in it now, and I should be able to step it up a bit more to make it pull out the back half.
Just a .030??? OMG step it up to like a .052, then we are talking !!! Hey NOW! That would wake it up....did I mention I need to be able to get down a dirt road? That might get interesting.  I think we'd do pretty well if we could get it to work on a 0.034 or 0.036 jet depending on the surface. Many times, my ramp is over 2sec just to keep the car north-south. On a "good" surface, we can shorten the ramp to 1-1.3sec.
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Re: What's too heavy for a Powerglide?
[Re: challenger451ci]
#2893449
02/26/21 04:29 PM
02/26/21 04:29 PM
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Joined: Mar 2003
Posts: 6,341
Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,341
Heaven
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Okay, Go back and try the trans since John rectified the issue, and leave in 2nd on your current 30 jet. If it seems to be seamless, then do the typical necessary changes to accommodate MORE jet/gear changes. FROM THE GO, AND THENNNNNNN ONNNNN OUT!
Last edited by EvilB1Dart; 02/26/21 04:30 PM.
"Any fool can know. The point is to understand"
- A. Einstein
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Re: What's too heavy for a Powerglide?
[Re: an8sec70cuda]
#2893481
02/26/21 07:04 PM
02/26/21 07:04 PM
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Joined: Jan 2003
Posts: 10,013
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,013
Frostbitefalls MN (Rocky&Bullw...
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Just speculating hear. With optional 1st and second straightcut gears available for the TF, could it be made to do the job and be as efficient and cheaper than converting to a glide? I don't think there is a low enough (numerically) 1st gear available for a 727 to work very well in an application like this. I'll try the 2nd gear leave VB from Cope in my 727 before I switch transmissions, but I'm leary of it b/c of my car's weight. I think I'd have to put a lot more rear gear in it to keep it from being such a dud and lugging the motor down bad. There are higher second gear ratios. Somewhere around 1.7 to 1.8? Lofgren Auto had some on the shelf when i was there a week ago.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: What's too heavy for a Powerglide?
[Re: challenger451ci]
#2893518
02/26/21 09:19 PM
02/26/21 09:19 PM
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Joined: Aug 2003
Posts: 4,690
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,690
On the parachute mount
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When I had 440-1 heads , and 528 (4.15 x 4.5) I used to leave on a plate with a .070 jet and progressed a fogger ( .036n .026f) at 3300lbs it would run 5.30’s at 130- 133 . That’s was 3.70 rear and 3 speed t400 stock ratios .
If I was you I’d be looking at a plate or ? Something for a second stage or a better controller and more jet in the kit you have .
Fastest I went with a 727 was 8.38 @ 160 . That was at 3550 lbs , sorry but I don’t remember the 1/8 numbers . I’m sure a 727 can handle more than 950 . Only weak part of the 727 is the sprag , and that’s more about breaking it on the starting line than downtrack
It’s really do you want to invest in a 727 ? Eventually you will outgrow it . Best for you might be a glide with a 1.82 or 1.78 first and a dump valve to help with the 1-2 rpm drop
I have a OEM case t400 from rossler , I called him to just get a 2nd gear leave valve body , and I ended up with a Reid case 2 speed $$$$$ 1.49 first with his dump valve set up
Last edited by n20mstr; 02/26/21 09:36 PM.
....BAD A$$ STREET CAR.....
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