Anyone here used a higher flow rate power steering pump adjustable valve?
I want to increase the sensitivity and raise the flow rate to get more feeling

 

I think its overboosted and numb from the factory. I got more feeling using an underdrive pulley on the crank to slow the accessories down, and a smaller diameter steering wheel. These are opposite of the direction you want to go. I feel like increasing the pressure is going to make the steering feel worse.

 

Not interested in boosting pressure at all.
I’m wanting to slightly reduce pressure by adding flow or volume. It’s the flow rate check valve you can change or modify that can add more volume and cut pressure to a degree
https://www.speedwaymotors.com/Heidt...%20(Feb28_2020)

 

The rabbit hole continues. I called Turn One today. They are super nice people. Word is that Heidt adjustable valve is more for pressure than flow. Turn One tech said it can actually make high assist maneuvers tougher. Another issue is the GM rack controlled by Magnasteer. It can overide the force of input and reduce the flow rate the pump makes. They also suggested I try a GM built PS pump valve that will flow a higher rate of 3.0 instead of the OE 2.5. That's my next line of attack. Flushing the PS fluid again and swapping out the flow valve
Has anyone adjusted the Magnasteer with a Tech 2 Scanner ?
Notes From Tech 2 Screen

DIAGNOSIS & TESTINGNOTE: . erform sudden turns (such as evasivemaneuvers). Perform SYSTEM CHECK. If ABS warning light and/o 2) If customer complains of too heavy or too light steeringeffort, go to STEERING RESPONSE PROGRAMMING.STEERING RESPONSE PROGRAMMING 1) Connect scan tool. Select MAGNA STEER, then RECALIBRATION.Answer VIN question; YES if VIN is correct or NO if VIN is incorrect. 2) Answer scan tool RECAL WITH FACTORY STANDARD CALIBRATIONquestion. YES will automatically install factory calibration. Exitscan tool. Programming is complete. NO will bring up selection menu. 3) If NO is selected in step 2), select desired response modefrom selection menu; MORE FIRM, FACTORY CALIBRATION or LESS FIRM. Exitscan tool. Programming is complete.DIAGNOSTIC TESTS* PLEASE READ THIS FIRST *

 

Whaa? Would a cheap knockoff tech2 do this as well?

 

My first thought when reading your first post was "that's gonna be tough with Magnasteer in the mix" lol. Glad you caught that before doing just the hardware and then realizing it

 

I would imagine a Tech2 clone would do it do thru the EBC area although, I don’t have one.
The next question is; how much overall effect does the Tech2 have on the Magnasteer control valve? Would a larger (3.0) PS pump flow control valve and the Tech2 make it feel lighter and crisper or just overly pressurized and numb?
The outcome will likely be better which will take some comparisons and sorting through the individual factors but it will be better. The last piece of the puzzle will revolve around the factory PS pump or a higher pressure Turn Two pump

 

My question here, if you're able to decrease pressure, increase flow, and alter the magnasteer, will you gain any good feedback? Or just make it heavier and still numb? I.E. is the lack of feedback so baked in it can't be gotten rid of so simply?

 

That’s million dollar question.
The way it works now I need more sensitivity and faster response & according to the Turn One tech rep if I increase only the flow (volume not pressure) it “can” help. My problem is this all comes down to trial and error. Matching the rack and pinion to the pump and configuring the Magnasteer magnetic controller to manage the feedback to put a level of responsiveness in the steering is the magic trick here. To start off a full flush and a flow valve swap with a Tech 2 scan and Magnasteer programming is a good start

 

The Magnasteer only adds to the artificial feel of the power steering, as the increased steering effort is created by electromagnetic force. By reprogramming the EBCM to the firm setting, all you will get is more electromagnetic resistance. With the stock hardware, there isn't much that can be done to improve on the steering feel of the Corvette. One thing I'll try on my car is to increase the steering rack preload, which might have loosened up at 110k miles. This could perhaps decrease the vague dead center feeling, as the play between the rack and pinion is decreased.

 

Well I'm sub'd to see how this goes, I am genuinely curious. Don't forget about the DRM solid rack bushing.

https://www.dougrippie.com/drm-steering-rack-bushings

 

My personal demand is for "increased feel" and "less effort".
Which the Tech 2 adjustment method is capable of for the rack Magnasteer controller . Adjusting it for "reducing effort" not increasing.
I think I will also try unplugging the pickup to gauge the complete delete of the Magnasteer.
Plus changing the PS pump control valve to the factory next level up flow rate

 

Steering on a Corvette doesn't have to heavy and numb.
Originally chassis engineers built a decent power rack with a pump capable of sustaining high levels of driving only to have their Chief engineers demand the system have overrides to quell test driver related feedback the car may respond faster than an unskilled driver might be capable of controlling so we get Magnasteer, on top of a moderate to slow ratio rack and pinion set with a dash of GM gap tolerance thrown in on a now 21 yr old car.
It can be properly addressed but it likely will take time and money with an unknown outcome.
My son is an engineer with Boeing and reluctantly helping sort out the information and fixes so I don't miss something

 

Yup, I misread that first post. Less restriction, higher flow, lower pressure.