RE-Medy upgraded water pump - better flow, and HP
#1
RX-7 Bad Ass
Thread Starter
iTrader: (55)
RE-Medy upgraded water pump - better flow, and HP
Hey guys -
Dunno if this has been discussed here or not, did a quick search and didn't find anything.
Mazmart is now making an upgraded water pump for the RX-8 and FD. Basically it's the same externally as the stock water pump, so it bolts right up like stock. But, the impeller blade is CNC machined to be FAR more effective at moving water.
Benefits are it moves more coolant, will supposedly cool the engine better, will definitely not cavitate at high RPM, and requires less power to do so, freeing up some wheel horsepower.
I've been digging through the WAAAAY too long thread on the RX-8 forum about the pump, and I think I've got it figured out.
Pump is $235, which is pretty damn reasonable, IMHO.
To order, they don't have it on their website yet. Call 800-221-5156 to order one. Also comes with a new water pump gasket, which is good. And, no, I have no relation to them, I'm just passing on new parts goodness .
OK, the horsepower increase. One dude guinea-pigged it for them. Dynoed at 202 wheel horsepower, drove to the shop, changed JUST the water pump (didn't disconnect the battery or anything), drove back to the dyno, put down 208 hp. Looking at the dyno graph, it's power across the board as well.
This makes sense, considering the FD and RX-8 water pumps use similar flat blade impellers. This offers a lot of resistance, and that robs power.
Attached are pics of the dyno chart and the new water pump impeller.
I might have to pick one of these dudes up .
Also, the *22* page RX-8 club thread. LOTS of noise and garbage in there to sort through .
http://www.rx8club.com/showthread.php?t=116423
Dale
Dunno if this has been discussed here or not, did a quick search and didn't find anything.
Mazmart is now making an upgraded water pump for the RX-8 and FD. Basically it's the same externally as the stock water pump, so it bolts right up like stock. But, the impeller blade is CNC machined to be FAR more effective at moving water.
Benefits are it moves more coolant, will supposedly cool the engine better, will definitely not cavitate at high RPM, and requires less power to do so, freeing up some wheel horsepower.
I've been digging through the WAAAAY too long thread on the RX-8 forum about the pump, and I think I've got it figured out.
Pump is $235, which is pretty damn reasonable, IMHO.
To order, they don't have it on their website yet. Call 800-221-5156 to order one. Also comes with a new water pump gasket, which is good. And, no, I have no relation to them, I'm just passing on new parts goodness .
OK, the horsepower increase. One dude guinea-pigged it for them. Dynoed at 202 wheel horsepower, drove to the shop, changed JUST the water pump (didn't disconnect the battery or anything), drove back to the dyno, put down 208 hp. Looking at the dyno graph, it's power across the board as well.
This makes sense, considering the FD and RX-8 water pumps use similar flat blade impellers. This offers a lot of resistance, and that robs power.
Attached are pics of the dyno chart and the new water pump impeller.
I might have to pick one of these dudes up .
Also, the *22* page RX-8 club thread. LOTS of noise and garbage in there to sort through .
http://www.rx8club.com/showthread.php?t=116423
Dale
#3
RX-7 Bad Ass
Thread Starter
iTrader: (55)
Another pic - comparison of stock RX-8 water pump to Mazmart's water pump.
Dale
Dale
#4
2/4 wheel cornering fiend
The product looks nice, and I don't doubt the dyno graph. However, did you ever see any testing data as to actual flow rates in the overly-long thread?
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#14
Eats, Sleeps, Dreams Rotary
iTrader: (14)
I'm having a hard time believing the 6 whp claim, though. Have people that switched to electric water pumps reported anything like this number?
#19
GorillaRaceEngineering.co
iTrader: (1)
The OEM 13B REW water pump impeller is one of the worst in the automotive world. They have square ends, square blades, open center etc. You can modify the blades somewhat to help but it still isn't anything great.
The 13B RE and T2 have an amazing water pump impeller that REALLY flows without cavitation.... Only problem is they aren't interchangeable with the rew because they flow in the opposite direction.
I'm very very glad to see a company after 16 years finally make a REAL water pump for the REW!! The pump looks really nice, congrats to them and thank you Dale for sharing this info with us!
-J
The 13B RE and T2 have an amazing water pump impeller that REALLY flows without cavitation.... Only problem is they aren't interchangeable with the rew because they flow in the opposite direction.
I'm very very glad to see a company after 16 years finally make a REAL water pump for the REW!! The pump looks really nice, congrats to them and thank you Dale for sharing this info with us!
-J
#20
2/4 wheel cornering fiend
I'd still like to see some flow rate comparison test results on this before plunking down hard-earned cash. No disrespect meant to Dale or the makers of this product, but there's a lot more that goes into water pump design than just nice looks and a dyno graph.
#21
GorillaRaceEngineering.co
iTrader: (1)
If the flow rate progression slows considerably and even drops after extended high rpm, the pump is probably cavitating. Cavitation drastically reduces the impeller's ability to move the coolant through the system.
I'd still like to see some flow rate comparison test results on this before plunking down hard-earned cash. No disrespect meant to Dale or the makers of this product, but there's a lot more that goes into water pump design than just nice looks and a dyno graph.
I'd still like to see some flow rate comparison test results on this before plunking down hard-earned cash. No disrespect meant to Dale or the makers of this product, but there's a lot more that goes into water pump design than just nice looks and a dyno graph.
#22
Racecar - Formula 2000
Hey guys -
Dunno if this has been discussed here or not, did a quick search and didn't find anything.
Mazmart is now making an upgraded water pump for the RX-8 and FD. Basically it's the same externally as the stock water pump, so it bolts right up like stock. But, the impeller blade is CNC machined to be FAR more effective at moving water.
Benefits are it moves more coolant, will supposedly cool the engine better, will definitely not cavitate at high RPM, and requires less power to do so, freeing up some wheel horsepower.
I've been digging through the WAAAAY too long thread on the RX-8 forum about the pump, and I think I've got it figured out.
Pump is $235, which is pretty damn reasonable, IMHO.
To order, they don't have it on their website yet. Call 800-221-5156 to order one. Also comes with a new water pump gasket, which is good. And, no, I have no relation to them, I'm just passing on new parts goodness .
OK, the horsepower increase. One dude guinea-pigged it for them. Dynoed at 202 wheel horsepower, drove to the shop, changed JUST the water pump (didn't disconnect the battery or anything), drove back to the dyno, put down 208 hp. Looking at the dyno graph, it's power across the board as well.
This makes sense, considering the FD and RX-8 water pumps use similar flat blade impellers. This offers a lot of resistance, and that robs power.
Dale
Dunno if this has been discussed here or not, did a quick search and didn't find anything.
Mazmart is now making an upgraded water pump for the RX-8 and FD. Basically it's the same externally as the stock water pump, so it bolts right up like stock. But, the impeller blade is CNC machined to be FAR more effective at moving water.
Benefits are it moves more coolant, will supposedly cool the engine better, will definitely not cavitate at high RPM, and requires less power to do so, freeing up some wheel horsepower.
I've been digging through the WAAAAY too long thread on the RX-8 forum about the pump, and I think I've got it figured out.
Pump is $235, which is pretty damn reasonable, IMHO.
To order, they don't have it on their website yet. Call 800-221-5156 to order one. Also comes with a new water pump gasket, which is good. And, no, I have no relation to them, I'm just passing on new parts goodness .
OK, the horsepower increase. One dude guinea-pigged it for them. Dynoed at 202 wheel horsepower, drove to the shop, changed JUST the water pump (didn't disconnect the battery or anything), drove back to the dyno, put down 208 hp. Looking at the dyno graph, it's power across the board as well.
This makes sense, considering the FD and RX-8 water pumps use similar flat blade impellers. This offers a lot of resistance, and that robs power.
Dale
Am I missing something here?
#23
Racecar - Formula 2000
If I look at the dyno graph carefully, the two curves cross over, and the blue (later) curve is higher only at the top (peak HP) and lower every where else. Assuming that the MazMart pump is the blue curve, that says to me that the MazMart pump is costing HP until it cavitates (less pumping, so less HP used) at the top end.
Am I missing something here?
Am I missing something here?
For reference, when you use a vacuum cleaner, the motor/blower speed increases when you block the air flow. Same principle.
Dave
#24
Lets Go Hokies!
iTrader: (5)
I would also like to see flow data for this new pump vs. the stocker.
Just for fun, here is another water pump prototype from another company that hasn't been produced yet (maybe it never will be):
https://www.rx7club.com/showthread.p...ghlight=fluids
It is interesting how different the designs are.
Just for fun, here is another water pump prototype from another company that hasn't been produced yet (maybe it never will be):
https://www.rx7club.com/showthread.p...ghlight=fluids
It is interesting how different the designs are.