Power steering pump pressure
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From: was 95926, now its 75602 for the last 6 years
Power steering pump pressure
Using 86 tpi and wondering what stock PS pump output pressure is.
It's getting installed in "basically" a 77 camaro.
On the flip side, putting IFS into hot rod and using standard 80's PS pump- are the pressures compatible?
Shop manual doesn't give specs.
Thanks!
It's getting installed in "basically" a 77 camaro.
On the flip side, putting IFS into hot rod and using standard 80's PS pump- are the pressures compatible?
Shop manual doesn't give specs.
Thanks!
Team Owner
Joined: Sep 2003
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You're attempting to "generalize" here and that's really not very productive for a "specialty" application. You need to mention specifically the gear box used 605/800 (you mentioned Camaro) and then you mention IFS - is it a box or a rack? The requirements are dramatically different both pressure/volume.
I'd say for a specialty application you need to contact someone like TurnOne and get "specific" in regards to pump vs. box/rack etc. There's CW and CCW rotations also. I'd say there's likely an "off the shelf" pump that's a "qualifier" BUT it may NOT be a Corvette.
***It might be likely that with the changing of the control valve spring and the orifice size change you could maybe accomplish what you'd like to do. If your attempt is to install the TPI in a Camaro or anything else for that matter is the mention of the steering box/rack you're attempting to use.
Last edited by WVZR-1; Jan 11, 2014 at 11:26 AM.
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From: was 95926, now its 75602 for the last 6 years
You're attempting to "generalize" here and that's really not very productive for a "specialty" application. You need to mention specifically the gear box used 605/800 (you mentioned Camaro) and then you mention IFS - is it a box or a rack? The requirements are dramatically different both pressure/volume.
I'd say for a specialty application you need to contact someone like TurnOne and get "specific" in regards to pump vs. box/rack etc. There's CW and CCW rotations also. I'd say there's likely an "off the shelf" pump that's a "qualifier" BUT it may NOT be a Corvette.
***It might be likely that with the changing of the control valve spring and the orifice size change you could maybe accomplish what you'd like to do. If your attempt is to install the TPI in a Camaro or anything else for that matter is the mention of the steering box/rack you're attempting to use.
I'd say for a specialty application you need to contact someone like TurnOne and get "specific" in regards to pump vs. box/rack etc. There's CW and CCW rotations also. I'd say there's likely an "off the shelf" pump that's a "qualifier" BUT it may NOT be a Corvette.
***It might be likely that with the changing of the control valve spring and the orifice size change you could maybe accomplish what you'd like to do. If your attempt is to install the TPI in a Camaro or anything else for that matter is the mention of the steering box/rack you're attempting to use.
sorry.
using 86 vette TPI in vehicle with OEM 77 camaro steering box. its a saginaw type( I think) its currently being powered by the proper 1977 PS pump.
I want to leave the running vette TPI motor/PS pump in place on motor and want to make sure pressure is compatible with the 77 box.
the IFS is from the 86 vette and is going into another project that will be taking the old SBC with '77 PS pump.
I know when using a mustang type rack in hot rod projects-a metering valve change is required on output of 70's-80's chevy pumps.
only reason i am asking here is cause you guys are corvette genius and I figured you might know pressure output of stock 86 vette TPI PS pump.
bottom line-give me the output pressure of the stock 86 vette TPI pump and I can figure out the rest.
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From: was 95926, now its 75602 for the last 6 years
http://www.speedwaymotors.com/Mustan...-GPM,5852.html
explains why I was concerned. Because if the vette rack is the same low pressure/volume type as the mustang-then I have to figure out a way to get a different PS pump onto the front of the vette motor while keeping pulleys in line(like using a truck pump but moving it since truck used longer? water pump.
explains why I was concerned. Because if the vette rack is the same low pressure/volume type as the mustang-then I have to figure out a way to get a different PS pump onto the front of the vette motor while keeping pulleys in line(like using a truck pump but moving it since truck used longer? water pump.
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From: was 95926, now its 75602 for the last 6 years
anecdotal evidence that chevy/chevy it wont matter.
if it does matter according to poster-then just R/R valve and spring off back of pump with valve and spring off pump related to whichever box on car you are using.
rack valve/spring goes into pump that is powering rack.
box valve/spring goes into pump powering box.
so it appears the pumps make enough pressure/volume to do whatever and the valve/spring controls how much gets out into hose and then to rack.
http://www.hotrodlane.cc/Streetstori...tagesteel.html
if it does matter according to poster-then just R/R valve and spring off back of pump with valve and spring off pump related to whichever box on car you are using.
rack valve/spring goes into pump that is powering rack.
box valve/spring goes into pump powering box.
so it appears the pumps make enough pressure/volume to do whatever and the valve/spring controls how much gets out into hose and then to rack.
http://www.hotrodlane.cc/Streetstori...tagesteel.html
Team Owner
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Here's the instructions for a Borgeson 899001 kit for modifying the pressures of the TC Saginaw pump. The kit can be purchased most anywhere you'd like. That would allow you to alter the pressure BUT you still may need to modify/replace the control valve to establish the proper "flow" required for the gear box. That isn't normally advertised but you could I'm sure use drill bit indexes to check the orifice bore. I believe though that there are only two rates 2GPM and 3GPM. Many sell those for the correct pumps, there would be a Saginaw P-series and the TC/SeriesII. I would think the steering box regardless if its a 605 or 800 would like to see 3 GPM
The instructions:
http://borgeson.com/instructions/899001
The kit:
http://www.borgeson.com/xcart/produc...4&cat=0&page=1
Since you mentioned later that you're using a gear box I'd suggest a call to Borgeson rather than TurnOne because they do both the 605 and the 800 gear boxes and can answer any question you could have. You can make them happy with a purchase of the kit or maybe even the correct sized outlet for whatever is needed. There are "flow-valve" fitting adapters to allow the use of either Saginaw o-ring sealed lines or conventional SAE Inverted Flare. I can't see you having issues. I'd think the valve and the shim kit $50 maybe shipped. Many others offer the "flow-valve" for the 2GPM reduction.
The instructions:
http://borgeson.com/instructions/899001
The kit:
http://www.borgeson.com/xcart/produc...4&cat=0&page=1
Since you mentioned later that you're using a gear box I'd suggest a call to Borgeson rather than TurnOne because they do both the 605 and the 800 gear boxes and can answer any question you could have. You can make them happy with a purchase of the kit or maybe even the correct sized outlet for whatever is needed. There are "flow-valve" fitting adapters to allow the use of either Saginaw o-ring sealed lines or conventional SAE Inverted Flare. I can't see you having issues. I'd think the valve and the shim kit $50 maybe shipped. Many others offer the "flow-valve" for the 2GPM reduction.
Last edited by WVZR-1; Jan 13, 2014 at 02:13 PM.
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the real issue with the R&P pump is volume, since pressure is relative and managed by the control/relief spring valve assy. Knowing the R&P is a single piston that's not all that big in diameter and stroke, I'd be inclined to believe that the output vol might be inadequate for a non-rack & pinion power assisted steering.
The good news is that IF that were the case and the steering is a R&P with a pump too small, then the steering assist would end up minimal, not like a case of morning sickness, which is common to dirty or old vette R&P systems...
pressure is easy.
Vol is limited by the pumps displacement and the 80s C4 pumps were pretty small...Vane/roller pumps do not generate great pressures anyway. That's a clue in itself.
The good news is that IF that were the case and the steering is a R&P with a pump too small, then the steering assist would end up minimal, not like a case of morning sickness, which is common to dirty or old vette R&P systems...
pressure is easy.
Vol is limited by the pumps displacement and the 80s C4 pumps were pretty small...Vane/roller pumps do not generate great pressures anyway. That's a clue in itself.
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Joined: Sep 2003
Posts: 25,394
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the real issue with the R&P pump is volume, since pressure is relative and managed by the control/relief spring valve assy. Knowing the R&P is a single piston that's not all that big in diameter and stroke, I'd be inclined to believe that the output vol might be inadequate for a non-rack & pinion power assisted steering.
The good news is that IF that were the case and the steering is a R&P with a pump too small, then the steering assist would end up minimal, not like a case of morning sickness, which is common to dirty or old vette R&P systems...
pressure is easy.
Vol is limited by the pumps displacement and the 80s C4 pumps were pretty small...Vane/roller pumps do not generate great pressures anyway. That's a clue in itself.
The good news is that IF that were the case and the steering is a R&P with a pump too small, then the steering assist would end up minimal, not like a case of morning sickness, which is common to dirty or old vette R&P systems...
pressure is easy.
Vol is limited by the pumps displacement and the 80s C4 pumps were pretty small...Vane/roller pumps do not generate great pressures anyway. That's a clue in itself.
I don't believe the OP has any issues to be concerned about. The orifice diameter like I mentioned should be easily confirmed.
Your comment regarding the pressures is "foolish" - these pumps are used for many applications from compacts to medium/heavy vehicles and for brake-boost applications also. If they didn't generate "great pressures" there wouldn't be applications for kits/shims to lower it from 1350 or so to a lower 850 or less.
I believe the Borgeson call would be my choice OR just install and then determine if you really have issues or not. Volume I believe effects "feel" and pressure of course the assist. If the OP had an 800 "quick box" from a Trans Am or Formula maybe the larger volumes would effect the "feel" more so. That would be a find for the OP, a "quick box" from a TA or Formula. Today I imagine they're a hard find and expensive.
Last edited by WVZR-1; Jan 13, 2014 at 03:31 PM.
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Thread Starter
Advanced
Joined: Jul 2006
Posts: 76
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From: was 95926, now its 75602 for the last 6 years
I believe all of the Corvette TC pumps do 3 GPM maybe or the vicinity. The TC pumps are all quite similar and that was a big plus for the variety of GM applications that use it, others also incorporate the TC pump. There are minor differences, the Corvette and the heavier units use bearing vs. bushing for the shaft. One of the modifications that TurnOne does is provide a pump that flows less at greater RPM's for a gain of maybe 3 HP.
I don't believe the OP has any issues to be concerned about. The orifice diameter like I mentioned should be easily confirmed.
Your comment regarding the pressures is "foolish" - these pumps are used for many applications from compacts to medium/heavy vehicles and for brake-boost applications also. If they didn't generate "great pressures" there wouldn't be applications for kits/shims to lower it from 1350 or so to a lower 850 or less.
I believe the Borgeson call would be my choice OR just install and then determine if you really have issues or not. Volume I believe effects "feel" and pressure of course the assist. If the OP had an 800 "quick box" from a Trans Am or Formula maybe the larger volumes would effect the "feel" more so. That would be a find for the OP, a "quick box" from a TA or Formula. Today I imagine they're a hard find and expensive.
I don't believe the OP has any issues to be concerned about. The orifice diameter like I mentioned should be easily confirmed.
Your comment regarding the pressures is "foolish" - these pumps are used for many applications from compacts to medium/heavy vehicles and for brake-boost applications also. If they didn't generate "great pressures" there wouldn't be applications for kits/shims to lower it from 1350 or so to a lower 850 or less.
I believe the Borgeson call would be my choice OR just install and then determine if you really have issues or not. Volume I believe effects "feel" and pressure of course the assist. If the OP had an 800 "quick box" from a Trans Am or Formula maybe the larger volumes would effect the "feel" more so. That would be a find for the OP, a "quick box" from a TA or Formula. Today I imagine they're a hard find and expensive.
You guys are great!
Thank you!
So the conclusion appears to be that the 86 vette pump will run my saginaw76 camaro box. At least enough to get me moving down the road again.
Then if steering doesnt feel like it used to then look at orifice changes to increase volume(or decrease-unlikely)
In all cases-both company references provided should help me along with your excellent advice.
Thank you and I will update when I drive it(hopefully sooner rather than later) Its been since 2005 since I got to drive it.
