Crank-mounted water pump?
#71
Here is my solution. I'll be the first to admit it is overkill, but as an engineer, the tolerance was killing me. In one pic, you can see that the bolt circle of these pump flanges is not EXACTLY the same as the pulley. Its real darn close. I confirmed this on the tech drawings of each part. That is why the holes are oversized and the reason that spacing the bolts wont make it perfect. I'm sure it works and works well but I guess I'm just too anal. lol. This spacer was made by a local shop for me. The spacer centers in the hub of the pulley, and the spacer has a lip that centers inside the pump for machine perfect alignment. Took the shop about an hour to bang it out. I think he used a cnc but I'm not certain. Looking forward to the rest of the install. Gotta move my batteries first.
Last edited by Basketcase; 03-23-2022 at 12:31 PM.
#72
BEACH PARTY / HOLLOWPOINT
Platinum Member
Thread Starter
First, cost to make? Will your machinist make more if asked?
Second, it looks like you have the smaller nipple going toward the balancer. On a big block, there’s a 3/4” hex head in the center of the pulley; how are you getting around the that?
Second, it looks like you have the smaller nipple going toward the balancer. On a big block, there’s a 3/4” hex head in the center of the pulley; how are you getting around the that?
#73
As for the bolt, I think it was a 5/8" bolt on mine and the bolt/washer fits inside the spacer and clears the pump just fine. Is that what you mean?
#74
BEACH PARTY / HOLLOWPOINT
Platinum Member
Thread Starter
My balancer (Gen VI 502) is bolted on then the pulley is installed. The pulley only has the three bolts attaching it to the balancer. The way it aligns (which is good) would require the center to be removed to clear the bolt. Your balancer bolt should mount the same way (the washer seals the alignment key… dab of RTV… and spreads the clamping load of the bolt across the hub of the balancer). Your picture had the balancer bolt in the wrong position it seems.
Last edited by TomZ; 03-23-2022 at 02:15 PM.
#75
My balancer (Gen VI 502) is bolted on then the pulley is installed. The pulley only has the three bolts attaching it to the balancer. The way it aligns (which is good) would require the center to be removed to clear the bolt. Your balancer bolt should mount the same way (the washer seals the alignment key… dab of RTV… and the spreads the clamping load if the bolt across the hub of the balancer). Your picture had the balancer bolt in the wrong position it seems.
#76
The hose from the power steering cooler to the old pump is larger. 1-1/2" I think. We now have 1-1/4 outlet from the pump. What sort of connector are we running to adapt the two? Obviously I'd prefer bronze but that doesn't seem to be available.
The following users liked this post:
Xcomunic8d (04-08-2022)
#79
BEACH PARTY / HOLLOWPOINT
Platinum Member
Thread Starter
I think it can be adapted, but I know I read something about Volvo using this setup and having to move to a pulley driven setup to slow down the pump. Evidently, they have cavitation issues with the higher rpm that LS engines run at wot.
With that said, guys have been using this pump above 5k on big blocks and I plan to spin my 509s in the upper 5k range.
With that said, guys have been using this pump above 5k on big blocks and I plan to spin my 509s in the upper 5k range.
Last edited by TomZ; 04-02-2022 at 03:04 PM.
#80