CBR Power Steering Pump options (1 Viewer)

[cruisermatt]

Ok so I got my pump and bracket a few weeks ago. Unfortunately it’s been sidelined by other projects somits not installed yet but here’s what I’ve found so far.

This pump is 2010-2012 LS3 Camaro application.
This first thing I noticed is that the pressure outlet is pointed downwards, the opposite of the PSC CBR and TC pumps.Might be good since it puts the hose farther away from headers.

The included reservoir doesn’t fit with the Trailblazer bracket, which is fine since I have a PSC remote reservoir already installed in the truck.
It’s removed easily with these two clips.

Next I bought some 10AN-NPT 90 adapters. It looks like we should be able to tap the return port to 1/2” NPT.
There’s a step for the O-ring that might need to be drilled out first.

that’s all I’ve got for now.

 

[matzell]

You guys do know that PSC will take your stock P-metric pump, rebuild it and boost it up for ~$100 right? You can get them to put a new can on it with whatever fittings you want as well. Cans are ~$20

 

[cruisermatt]

You guys do know that PSC will take your stock P-metric pump, rebuild it and boost it up for ~$100 right? You can get them to put a new can on it with whatever fittings you want as well. Cans are ~$20

Yes. I have their can on a stock P-pump currently.
What we are trying to determine is if we can get a CBR pump on a similar budget. This pump was $115 and “should” be a CBR pump.
I guess had to also buy a $100 bracket too, but would have to buy that for the PSC CBR pump too.

 

[matzell]

Why not use their p pump or modify yours? I use it on my race car with 40" stickies and a 2.5" double ended ram with no problems.

 

[GLTHFJ60]

Why not use their p pump or modify yours? I use it on my race car with 40" stickies and a 2.5" double ended ram with no problems.

There's something to be said for R&D, which is the point of this thread.

 

[cruisermatt]

Yeah, we’re just exploring something different.

 

[nukegoat]

@cruisermatt - what sort of pulley comes on the end of that CBR pump? Can you also get a few other dimensions for me? like distance between mounting bolts, and the distance from the back mounting bolts to the centerline of the pulley?

I'm starting to understand these stupid pumps a bit better now. I think the Toyota pump has the same mounting dimensions as the TC/CB pump so I'm part of your club here now

 

[cruisermatt]

Yes, I will. I picked up a pulley for a Trailblazer (to match the bracket I had bought for my engine) but the bore is different from the Camaro pump. Coincidentally, I picked up another motor from an Envoy which has a TC pump and pulley on it. I need to get them side by side and get a pulley for the Camaro pump, but the bolt patterns are the same, the pulley bores are different, not sure on pulley offsets yet. The pressure hose outlet is on opposite sides of each pump, so that may be a reason alone to choose one over the other. I will order a Camaro pulley right now. I was hoping to test both pumps on my truck and play with pulley diameters and see if I can tell a difference.
Either way I need to make a change, my P-pump was squealing like a pig out in the woods last weekend.

 

[cruisermatt]

For the sake of clarity, lets refer to this pump as the Camaro SS pump. I don't believe that PSC uses these a base for their CBR pump, the case is different, the pressure port outlet is on the opposite side of the TC pumps and the PSC CBR pumps. It should be noted that I have found that the 2016-19 D-max Silverado/Sierra 2500/3500's have what looks to be the same pump case with a different reservoir (for about $35 less then the camaro pump, and you're throwing the reservoir out anyways!). The fact that they're on new HD trucks should be a good indicator that these pumps might have more potential.

Here are some initial dimensions. This pump has a 0.66" shaft. All bolt faces are on the same plane. Here's the bolt pattern.

The other GM pump I have looks like a TC pump, its from an Envoys/Trailblazer, and a bunch of other GM vehicles. It DOES looks like the one PSC uses as a base for their products. It has the same bolt pattern but with a 0.75" shaft. I will get dig that one out and get the reservoir and pulley off and see how it can be modified to accept a remote reservoir.

It should be noted that there are dozens of pulleys availble for both 0.66" and 0.75" shaft sizes, so there should be no trouble finding a pulley to work for your application.

 

[nukegoat]

For the sake of clarity, lets refer to this pump as the Camaro SS pump. I don't believe that PSC uses these a base for their CBR pump, the case is different, the pressure port outlet is on the opposite side of the TC pumps and the PSC CBR pumps. It should be noted that I have found that the 2016-19 Silverado/Sierra 2500/3500's have what looks to be the same pump case with a different reservoir (for about $35 less then the camaro pump, and you're throwing the reservoir out anyways!). The fact that they're on new HD trucks should be a good indicator that these pumps might have more potential.

View attachment 2172975View attachment 2172976

Here are some initial dimensions. This pump has a 0.66" shaft. All bolt faces are on the same plane. Here's the bolt pattern.

View attachment 2172978
View attachment 2172977

The other GM pump I have looks like a TC pump, its from an Envoys/Trailblazer, and a bunch of other GM vehicles. It DOES looks like the one PSC uses as a base for their products. It has the same bolt pattern but with a 0.75" shaft. I will get dig that one out and get the reservoir and pulley off and see how it can be modified to accept a remote reservoir.

It should be noted that there are dozens of pulleys availble for both 0.66" and 0.75" shaft sizes, so there should be no trouble finding a pulley to work for your application.

Thanks. Will measure mine soon. How tall is the pump? Like depth

 

[nukegoat]

Confirmed that the yota pump is the same mounting dimensions... That's a win

 

[cruisermatt]

Under 4-3/8”

 

[cruisermatt]

Confirmed that the yota pump is the same mounting dimensions... That's a win

*(100 series LC pump)

 

[nukegoat]

*(100 series LC pump)

Also the shaft diameter appears to be a .666 OD. GM and Toyota did some part sharing around this era. The electrohydraulic brake boosters, for example. I wonder if this is just some CB pump internally. Or all these things are basically the same

 

[nukegoat]

*(100 series LC pump)

Seems like a ton of the Toyota pumps from this era look identical but have different orifices and reliefs etc. At least the casings are nearly all the same. Highlanders, Camrys, etc.

 

[cruisermatt]

Time for some pulley comparison. I have a Ls with the same truck-style accessory drive spacing that most LS users have. I bought every Dorman 6-groove pulley that has a .66 bore that was $25 or less on Amazon. The stock 2010-12 Camaro pulley is 6.22” and I’d like to find one that’s smaller to spin the pump a bit faster.

 

[cruisermatt]

TC and Camaro Cbr mounted side by side on the same bracket. Note the much larger body on the new pump.

Some measurements. The new pump snout ends slightly shorter then the TC.

There was a 4.5” pulley I really wanted to use but it had a very positive offset that made it unfeasible to use without seriously modifying the bracket.
This 5.25” pulley (Dorman 300-313, 2000’s Dodge minivan V6) looks like it will work with 0.235” spacers between the pump and mount bracket. It’s the same-ish diameter as the Envoy pulley so the belt from that application should fit right on? We’ll see.

 

[cruisermatt]

Here you can see the four washers I stacked between the pump and mount to achieve the correct spacing

Note the much larger pump body.

 

[cruisermatt]

Just whipped up a quick spacer out of some random 1/4” flat bar, milled .015” off where the pump sits, and tacked it to the bracket so I just have to install the pump like normal and not fumble with lining up two sets of bolt holes when working in the engine bay

 

[cruisermatt]

Then cut the 1/2 NPT Tap in half, shove an earplug in the pump, ram a 3/4” drill bit in there, and tap and if you don’t screw that up you now have a -10 return.
I wonder if a weld fitting could be used without disassembling the pump.