HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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power steering pump

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Re: power steering pump

Post  Bluemach1 on Sun Nov 22, 2009 10:26 am

Why did I do this in mm? I dont know...

Converted...
pulley face to block = 4.926"
pulley face to center of first first acc groove = 0.859"

4.926" - 0.859" = 4.067"

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which motor (CRANK PULLEY)?

Post  xschop on Sun Nov 22, 2009 10:32 am

If you have the FBODY/GTO crank pulley then all the numbers are correct. 18-19mm is 3/4" so the F-body bracket can be milled that much and a .75" offset pulley can be lathed out for the 944 PS pump to make it all fit. I will double check the bracket to see if the Vette crank pulley offset can be a go...Thanks Blue.

When you say pulley face, are you talking about inner face or outter face to block ?(not timing cover edge like the internet info find)
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Re: power steering pump

Post  Bluemach1 on Sun Nov 22, 2009 11:28 am

Outer facing being the farthest point from the engine block.

This is F-Body. The engine if out of a 2000 Trans Am.


Let me know if you need anything else. I'll have this up on the stand for quite a while.

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awesome

Post  xschop on Sun Nov 22, 2009 11:41 am

So the F-body pulley is exactly 0.75" shorter than the truck.
The Truck alternator fits perfectly in the F-body alternator bracket which can be milled down by 0.75" where it attaches to the adapter I made. I designed it like this to keep the cost down on the bracket set-up. I will get pics up shortly.
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2 birds with 1 stone

Post  xschop on Sat Dec 05, 2009 4:56 pm

1-off billet pully mates to the stock 944 power steering pump crank flange and uses the same 944 3-bolt pattern even.... The inexpensive ($25) F-body alternator bracket is used and the inexpensive ($80) truck alternator can be used.....
The pully is the correct conversion diameter for the LS crank and truck crank diameter, I will be making the pulleys for the F-body and Corvette Crank pully offsets shortly now that I know their differences...

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I designed the bracket to mount to the driver's head first and has provisions for future ps reservoir relocation if you so choose....

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Belt clearance is nice, just make sure you zip tie your return water lines securely...

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Plenty of frame-rail clearance with the 6.75" diameter pulley when it is mounted below, the whole reason for the redesign....

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And most importantly the alternator is well below the hood line...

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Re: power steering pump

Post  Bluemach1 on Sat Dec 05, 2009 8:28 pm

sooooo.... The F-body set up isnt relocating the alternator as shown in your pictures is it? Or is this just the truck setup only? Will the original serpentine belts be used?

Looks very nice.

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Re: power steering pump

Post  gt1scca on Sat Dec 05, 2009 9:20 pm

I think the main goal was to use the 944 PS pump.
Cheap(er) accessories are a bonus...

Right?

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Re: power steering pump

Post  xschop on Sun Dec 06, 2009 7:08 am

Yes, the main goal(s) were to mount the stock 944 PS pump with the correct diameter pulley since the pulley ratios on the 944 are almost exactly 1:1. The 944 Crank/PS Pulley is 4" and the LS/Truck pulleys are 6.75". So I had to make a 6.75" 6-grove pulley with the 944 mating dimensions and the truck serpentine offset. The 944 PS pump if located up near the head would only allow for a 4.75" Pulley, another reason for the redesign of the Swap Bracket. Another No-Brainer.... I don't have to worry if the pressure is right for the rack. The GM Power Steering pump is not a good match for the 944 rack.The F-body pulley sets 3/4" in more so than the truck, so a pulley will be made for that.
Also, the F-body Alternator Bracket can be milled down 3/4" on the back to bring the alternator (truck) in alignment if the F-body crank pulley is used. (The Vette alternator Dims is the unknown ATM)
If someone has an F-body or a C5 vette alternator to measure, it may be that they already set 3/4" back IDK unless I had one in hand.
And Yes, the F-body bracket is used to relocate the truck alternator in the spot you see because the 5.3 truck alt. bracket would set it 2" above the hoodline (and is cheaper than a 6x8x12 block of T-6061!)..... I also found that the alternator on the passenger side would require you to get rid of the headlight motor mechanism and install an extra pulley so the belt clears the water snout on the WP... Shocked
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Corvette offset is a go too!

Post  xschop on Sun Dec 06, 2009 9:25 am

I just came in from the cold with a set of calipers. The F-body bracket can be milled all the way down on the backside and the Swap bracket machined thinner in that area to allow the Truck alternator to align with the Vette pulley Cool
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Re: power steering pump

Post  Bluemach1 on Sun Dec 06, 2009 10:09 am

let me know if you need any other f-body neasurements. still have mine up on the stand.

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Gracias

Post  xschop on Sun Dec 06, 2009 10:29 am

Thanks Blue. It is just the exact milling depth of the F-body bracket for the Vette pully alignment that I am not 100% so sure about . The F-body bracket needs to be trimmed/milled 3/4" if you use the F-body crank pulley.
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Re: power steering pump

Post  Bluemach1 on Sun Dec 06, 2009 11:43 am

X, Can you please clarify...

I just measured the crank and PS pullies on my LS1.

Crank diameter is 7.5" and the PS is 6.5". You mentioned before that the ratio needs to be 1:1. It looks like there is plenty of clearance for a PS pully of 7.5" in the current location. I dont know what the clearance requirements need to be for the 944 PS pump housing to the head and allow for pully alignment.

I am not clear on the necessity to move the alt to the PS location for the F-Body LS1.

Know what I mean? What am I missing?

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944 PS pump option

Post  xschop on Sun Dec 06, 2009 12:03 pm

If you want to keep or adapt the 944 PS pump to the LS, it must be mounted below and alternator on top because the 944 PS pump conversion pully (7.5") will not fit (clear frame rail) if mounted up top. About 4.75" 944 PS pulley is max diameter in that area and would not match the original 944 1:1 ratio.
Also, personally I would rather the alternator not get road drenched down below...another plus...
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Re: power steering pump

Post  Bluemach1 on Sun Dec 06, 2009 12:25 pm

I am not trying to be difficult....really!...but..

If the PS pump is on top, there should not be any frame rail clearance issue at all, right? (assuming that the PS pump is roughly located in the same position). And also assuming that the pump is in the same location, with a 7.5" pully, there should be clearance to hood and other components.

I guess, ultimately, it doesnt matter. I am just trying to get my head around this.

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Re: power steering pump

Post  xschop on Sun Dec 06, 2009 12:29 pm

The 944 PS pump rear alloy area does not allow it to sit with a 7.5" diameter pulley anywhere in front of the block, no matter what bracket you could conjure up......That's the problem with it on top
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Re: power steering pump

Post  Bluemach1 on Sun Dec 06, 2009 12:41 pm

Got it! I thought that is what it might be. cheers

Thank you for being patient with me!

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Update

Post  xschop on Wed Jan 20, 2010 2:27 pm

I just got in the 3/4" billet stock to make more of the brackets for the truck and F-body crank pilley offset. I will be modifying a March performace Billet 6-groove pulley to keep the cost down on the kit. Look for it soon on the site. As a heads up, if you are unning the F-body Crank pulley, I will need you to send me the F-body Alt bracket and I will mill it 0.75" for free and send with the kit.....

I will reiterate also that if you plan on running AC, The 4.8,5.3,6.0l truck crank pulley IS THE TICKET. It's offset allows the GM AC compressor enough room to clear the LS motor mount plate on the passenger side.....No need to go buy the expensive Porsche AC compressor either and try to mod it up to the LS or truck block.......TRULY another FORSCHE exclusive......
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Re: power steering pump

Post  xschop on Mon Mar 08, 2010 8:00 pm

Update: I revisited the F-body set-up after getting some questions from boardmembers. This bracket I designed for the truck offset works perfect with with 72" 6-groove serpentine and does not require an idler pulley to clear the frame rail. The F-body however does require an idler pulley because the alternator needs to be moved over 1" so it can clear the driver valve cover since it must be set back 0.75". This presents a problem of the belt rubbing the driver frame rail. I have ordered a GM idler pulley and will design a bracket to set it between the alternator pulley and billet Power steering pulley so it will clear the driver frame rail by a mile. (Check pics on previous page)

I will repeat again...There is no bracket or pulley that will let you keep the F-body alternator on the lower driver side (factory) and set the 944 PS pump on the driver's upper head area....IT WILL NOT FIT with the correct size conversion pulley.
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PS pump setup

Post  fliermike45 on Tue Mar 09, 2010 10:23 am

Great info in your posts.
Do you have a picture taken face on to the front of the engine that shows the relationship of the alt and ps pump to the crank pulley?
Thanks for your work.

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Re: power steering pump

Post  xschop on Tue Mar 09, 2010 11:38 am

No I don't , Since I did all the work with the engine in the car. I did find an inexpensive ($15 Autozone Duralast Idler # 23-1052) That will mock up this week for the bracket. This will keep the kit cost down, I'm going to mock it up even on my truck motor so I can report back which belt will be required. I also got the Autozone brand 6-Rib 72" (#725-k6) for $16. So all in all, will be 100% bolt-on and you can re-use the 944 PS pump and you do not have to hunt down fittings.
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Re: power steering pump

Post  Wild Bill on Tue Mar 09, 2010 5:52 pm

Anyone ever try a GM pump with an adjustable power steering valve. Heidts sells one..
Page 57.. [You must be registered and logged in to see this link.]
It's just a pressure regulator with a handy knob but you could set pressure lower than Porsche factory pressure if you wanted for less assist/more feel..
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Re: power steering pump

Post  Porch on Tue Mar 09, 2010 11:22 pm

Turn One also sells an adjustable pressure valve, but it doesn't look like it's on their website...the guy just mentioned it when i talked to him way back when.

I'm just kind of curious about the overall cost of this setup. Turn One quoted me $300/shipped for a brand new GM pump modified to any spec i want (including if/when i'm going to run hydroboost). Plus, if i went with the Porsche pump, wouldn't i have to run the reservoir line all the way across the engine?
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Re: power steering pump

Post  xschop on Wed Mar 10, 2010 10:30 am

Wanted to confirm if the reservoir and cooling coil lines are a special hydraulic fluid resistant line, or can we just run 3/8" ID fuel line or heater hose?
The main pressure line is re-usable as well even.
I got the final bracket design drawn up for the idler pulley (#23-1052) which will come with the kit for both the truck and the F-body crank offsets.
xschop wrote:... you can hold me to it.
(Edited for pricing details, Rule #5)
No prices. I'll hold you to that.
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Re: power steering pump

Post  Porch on Wed Mar 10, 2010 12:19 pm

I don't know about fuel line, but i know for sure that heater hose won't work. You could use either transmission fluid line or p/s fluid line, either is a buck a foot at Autozone.
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Power Steering Pump

Post  fliermike45 on Mon Mar 15, 2010 10:44 am

I have read this thread with interest, I have decided to stick with the stock PS Pump location on my LS1 that has been converted to F-Body accessories.

Turn One have supplied a new modified pump with pulley and reservoir for $285.

Usual disclaimer, I'm not associated with Turn One.

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Re: power steering pump

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