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line pressure adjustment #877220 12/11/10 06:37 AM 12/11/10 06:37 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel OP master
rebel OP master Joined: Dec 2006 Posts: 4,647 aotearoa	how many psi increase will i get if i adjusted my line pressure 1 complete turn? since you have to drain the fluid & pull the pan i don't want to be doing multiple trips into transland, so if i get a few answers, logic dictates i choose the average. it's a A&A Ultimate low band brake with the clean N at the end of the shifter in a 727. thanx for your input.

Re: line pressure adjustment [Re: rebel] #877221 12/11/10 10:26 AM 12/11/10 10:26 AM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	Some valve body manufacturers use different springs in the regulator. So I would call A&A and ask them for that exact valve body. I only have the info for the Griner manual (footbrake) valve body that I use. What pressure is it at now? FWIW, I am at 165 psi. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: line pressure adjustment [Re: 440Jim] #877222 12/11/10 02:39 PM 12/11/10 02:39 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel OP master
rebel OP master Joined: Dec 2006 Posts: 4,647 aotearoa	i'm a little over 100 psi & 165 is where i'm aiming for. my problem is, i'm going racing today & want to wind up the pressure before i go racing.

Re: line pressure adjustment [Re: rebel] #877223 12/11/10 08:17 PM 12/11/10 08:17 PM
Joined: Jan 2003 Posts: 25,785 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,785 Rio Linda, CA	You won't gain 65 psi with a simple adjustment. The INTERNET, the MISinformation superhighway

Re: line pressure adjustment [Re: John_Kunkel] #877224 12/11/10 09:17 PM 12/11/10 09:17 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: You won't gain 65 psi with a simple adjustment.

Re: line pressure adjustment [Re: rebel] #877225 12/11/10 09:39 PM 12/11/10 09:39 PM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	Quote: i'm a little over 100 psi & 165 is where i'm aiming for. my problem is, i'm going racing today & want to wind up the pressure before i go racing. I believe that will require a regulator spring change. I am surprised that trans brake has such a "low" pressure. I would have guessed it would be 120-140 minimum. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: line pressure adjustment [Re: 440Jim] #877226 12/12/10 06:19 AM 12/12/10 06:19 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel OP master
rebel OP master Joined: Dec 2006 Posts: 4,647 aotearoa	well for what it's worth. 2 complete turns gained 50 psi. no springs required.

Re: line pressure adjustment [Re: rebel] #877227 12/12/10 10:22 AM 12/12/10 10:22 AM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	Quote: well for what it's worth. 2 complete turns gained 50 psi. no springs required. Wow, that is one wicked spring rate. For comparison, my Griner valve body instructions say 8 psi per turn. Are you sure the original measurement was accurate (rpm, etc)? If it was 135 originally (the range I expected) and two turns gave you 150 that would be closer to the spring Griner uses. But I don't know about the A&A.

Re: line pressure adjustment [Re: 440Jim] #877228 12/12/10 02:51 PM 12/12/10 02:51 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel OP master
rebel OP master Joined: Dec 2006 Posts: 4,647 aotearoa	the original test was done twice just to confirm it was only 100 as i was thinking i'm not measuring this correctly, but i was. so 2 turns later we were checking the SAME guage reading 50 psi higher in 1st gear like we checked before. i wasn't expecting such a big gain from 2 turns but then i've never done this test before.

Re: line pressure adjustment [Re: rebel] #877229 12/12/10 06:13 PM 12/12/10 06:13 PM
Joined: Jan 2005 Posts: 716 Indiana 6 65dragnet super stock
65dragnet super stock 6 Joined: Jan 2005 Posts: 716 Indiana	Do yourself a favor , the next time you have your tranny out ,drill and tap the case in-line with the adjuster and put a plug in it. You can adjust the pressure without pan removal. E. Williams 65 Coronet 500 3400lbs w/d, 446, Indy EZ'S, A&A transbrake,Comp 650 lift cam, 6.50 @ 105 mph 1/8th 10.25 @ 130mph 1/4

Re: line pressure adjustment [Re: 440Jim] #877230 12/12/10 06:44 PM 12/12/10 06:44 PM
Joined: Jan 2003 Posts: 25,785 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,785 Rio Linda, CA	Quote: Wow, that is one wicked spring rate. That's what I'm thinkin'. Two turns is a little over .080". The INTERNET, the MISinformation superhighway

Re: line pressure adjustment [Re: 65dragnet] #877231 12/13/10 12:55 AM 12/13/10 12:55 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel OP master
rebel OP master Joined: Dec 2006 Posts: 4,647 aotearoa	Quote: Do yourself a favor , the next time you have your tranny out ,drill and tap the case in-line with the adjuster and put a plug in it. You can adjust the pressure without pan removal. yep, i was thinking that same thing when i was adjusting it. if i had an 1/8" tap & suitable drill i would have done it right there & then. it's a bit of a no brainer really but then how often would you adjust it?

Re: line pressure adjustment [Re: rebel] #877232 12/13/10 01:47 AM 12/13/10 01:47 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Drilling and tapping would be a smart move on my part, I'll be pulling a 518 apart in the next week or so and I will probably need to adjust it... thanks for the tip guys

Re: line pressure adjustment [Re: MR_P_BODY] #877233 12/13/10 01:39 PM 12/13/10 01:39 PM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	Raff, This might help. This is how I did it. The "mill 3/8 deep" is from the outer edge where the stampings are located. The case isn't that thick! 6355120-Line_Pressure_Adj_Access.jpg (56 downloads)

Re: line pressure adjustment [Re: 440Jim] #877234 12/13/10 01:43 PM 12/13/10 01:43 PM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	And the inside ends up looking like this: 6355128-Line_pressure_access_inside.jpg (63 downloads)

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