Flaming River rack and pinion
#21
Racer
Thread Starter
Clyde
#23
Racer
Thread Starter
#24
Racer
Thread Starter
#25
Flaming River Rack and Pinion issue
well we got the headers sorted out, had to bend and replace a section of #1 header tube,
This is with the tube cut off>
New pipe tacked in place.
welded header in place.
Shot from underneath.
[IMG]https://cimg2.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x2000/80-
img_2751_90473f7f5f0730b52eae4a76382b134 d2e447996.jpg[/IMG]
Everything runs smooth with no contact between headers and universal joints. HOWEVER, with the steering shaft centered according to Flaming River marks which I confirmed, the passenger side rod connecting the tie rod end to the R/P is approximately 2" short. Has anyone ran into this before or have a solution. I have been trying to contact Flaming River by their 1-800 number but it does not work. As of now I have been unable to contact them. Any input would be greatly appreciated.
Clyde
This is with the tube cut off>
New pipe tacked in place.
welded header in place.
Shot from underneath.
[IMG]https://cimg2.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x2000/80-
img_2751_90473f7f5f0730b52eae4a76382b134 d2e447996.jpg[/IMG]
Everything runs smooth with no contact between headers and universal joints. HOWEVER, with the steering shaft centered according to Flaming River marks which I confirmed, the passenger side rod connecting the tie rod end to the R/P is approximately 2" short. Has anyone ran into this before or have a solution. I have been trying to contact Flaming River by their 1-800 number but it does not work. As of now I have been unable to contact them. Any input would be greatly appreciated.
Clyde
Merv
#26
Instructor
Yes, I gave them the measurement from tip to tip on mine, it was 40-1/2", the guy from F/R said it should be 41-1/2", maybe sent me the wrong passenger side inner tie-rod end installed in the kit. Even still, it would not have been long enough. The extender we made up works fine, the car handles great, no play and very responsive. hoping to get one more run in tomorrow before the snow flies. go back to work on Wednesday and will not get back in until the 24th of Dec, so i hope the snow stays away for another few days. Not much I could do with F/R, they say this unit has been on the market for 5 years now with no issues like I explained to them. Didn't want to remove the unit and send it back, I live in Newfoundland, Canada and the trouble, shipping cost and wait for a return unit was not worth it. They told be that all the racks are the same, it's just the cradle and the inner tie-rod end length are different. Over all, even with the header modification, I still think it was a great upgrade.
Clyde
Clyde
#27
if you have not replaced the flow control value in the power steering pump I would start there.
Here is the difference in the flow control value I used.
Left is the unit from turn-one.
See here for something like this.
https://www.turnone-steering.com/col...low-restrictor
As for alignment the other thing that makes twitchy is rear thrust angle, or caster front ( left vs right side ) is not in balance.
Also with most r&p steering you could add more caster to the front wheels. 5-6 degrees. This will require a change from the factory upper control arms to do this, or offset shafts.
Last edited by cagotzmann; 07-10-2019 at 11:21 AM.
#28
Instructor
I have the flaming River "variable" PS pump that came witn the Rack system. You would think they would supply a unit that plays well with their system. Not sure the science behind the Variable pump , I will have to look into that, and if you can valve it down.
For the front suspention I have SPC adjustable upper A arms, so adjustment is no issue.
current frontn is .25 camber castor is 6.5
rear .25 neg toe .125
#29
I have the flaming River "variable" PS pump that came witn the Rack system. You would think they would supply a unit that plays well with their system. Not sure the science behind the Variable pump , I will have to look into that, and if you can valve it down.
For the front suspention I have SPC adjustable upper A arms, so adjustment is no issue.
current frontn is .25 camber castor is 6.5
rear .25 neg toe .125
Do you have a print out of the alignment. I would check left side vs right side and most important check rear thrust angle.
DIY alignment or done at a shop ?
#30
Instructor
in addition to the SPC uppers I have Van steel 6 degree positive lower a arms. this was part of a coil over Kit I installed.
#31
My dealership does this for $30.00. complete with printout.
But twitchy I would guess left vs right side settings is not similar and the rear thrust is out, or the rear tailing arm bushing are moving around.
#32
Instructor
See if he will do a quick measurement only (complete print out) and see if the alignment is balanced left vs right side. Or you could take the car to any GM Dealership with an up to date alignment rack and do a measurement only.
My dealership does this for $30.00. complete with printout.
But twitchy I would guess left vs right side settings is not similar and the rear thrust is out, or the rear tailing arm bushing are moving around.
My dealership does this for $30.00. complete with printout.
But twitchy I would guess left vs right side settings is not similar and the rear thrust is out, or the rear tailing arm bushing are moving around.
I spoke with Flaming river and they said their variable PS pump at low RPM runs about 1000PSI then when RPM's reach around 2000 it lowers to roughly 300PSI. Their responce to the twitchyness was . The R&P system is very responsive and takes a little getting used to. Ok I'll buy that to a point.
I spoke with Van Steel as well. they suggested Rear .265 total toe.......... front: camber 1/2 Neg......... castor +7.5 ........toe front:.. .032 left and right with a total of .0625 and to make sure the front is symetrical.
They also said that the rack systems were not their favorite because of the exact problems iam having..ie: a ghost feel and dartyness. They believe the rack ratio is too agressive, So they opt for the Borgenson system.Noted points
Thnak you for your input, all good advice.
Iam leaving town for 4 weeks so this will have to wait till then.. I will check back after I get the alignment checked out again.
Last edited by Roadworn; 07-10-2019 at 03:20 PM.
#33
Revise: Van steel lower a arms and SPC adjustable uppers.
I spoke with Flaming river and they said their variable PS pump at low RPM runs about 1000PSI then when RPM's reach around 2000 it lowers to roughly 300PSI. Their responce to the twitchyness was . The R&P system is very responsive and takes a little getting used to. Ok I'll buy that to a point.
I spoke with Van Steel as well. they suggested Rear .265 total toe.......... front: camber 1/2 Neg......... castor +7.5 ........toe front:.. .032 left and right with a total of .0625 and to make sure the front is symetrical.
They also said that the rack systems were not their favorite because of the exact problems iam having..ie: a ghost feel and dartyness. They believe the rack ratio is too agressive, So they opt for the Borgenson system.Noted points
Thnak you for your input, all good advice.
Iam leaving town for 4 weeks so this will have to wait till then.. I will check back after I get the alignment checked out again.
I spoke with Flaming river and they said their variable PS pump at low RPM runs about 1000PSI then when RPM's reach around 2000 it lowers to roughly 300PSI. Their responce to the twitchyness was . The R&P system is very responsive and takes a little getting used to. Ok I'll buy that to a point.
I spoke with Van Steel as well. they suggested Rear .265 total toe.......... front: camber 1/2 Neg......... castor +7.5 ........toe front:.. .032 left and right with a total of .0625 and to make sure the front is symetrical.
They also said that the rack systems were not their favorite because of the exact problems iam having..ie: a ghost feel and dartyness. They believe the rack ratio is too agressive, So they opt for the Borgenson system.Noted points
Thnak you for your input, all good advice.
Iam leaving town for 4 weeks so this will have to wait till then.. I will check back after I get the alignment checked out again.
https://www.turnone-steering.com/blo...him-kit-theory
Its the flow of the pump not the pressure, so find out what the flow rate of the pump is. When I changed the flow rate of my pump the feel ( light steering was improved ), I could still use less flow to match my C6 steering, but its much better than before the flow change.
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