Electric water Pump

[JohnnyV]

This tread was to ask if any ones done the mod, regardless of dyno results. I'm looking for first hand experience. furthermore Its easier cheaper to gain horsepower through programing or a bottle than through a waterpump conversion. Everyone was helpful regarding the "flatspot" thread.

[JohnnyV]

haha... it also what we drink with vodka on those cold February nights.
There aren't many of these cars around, to see one period usually goes unnoticed (especially by the 5o). For the people who do recognize the car, asked why the hell I drive it durning the winter... If I could put snow tires on my bike I would.

[GUNRDY]

For those interested in looking it up. GM High Tech magazine installed an EWP on a firebird and dyno'd it, if I remember correctly they gained about 8 hp at the wheels. It shouldn't take to much effort to find it on their website.

Frank

[darkman]

Originally Posted by GUNRDY

For those interested in looking it up. GM High Tech magazine installed an EWP on a firebird and dyno'd it, if I remember correctly they gained about 8 hp at the wheels. It shouldn't take to much effort to find it on their website.

Frank

Thanks. If this is the right article, I read it as being a 4 HP gain with the electric water pump, and another 2.8 HP with an MAF change.


http://www.gmhightechperformance.com...est/index.html

[Naf]

Not a good idea...You will get a few ponies yes, but if it fails you are dumb out of luck..Had several here fail and it wasnt pretty...

[trukk]

I know John Ridge has on e on his car, but he's on a little 'vacation' right now.

I lump this with an under drive harmonic balancer. It adds a few HP, but nothing major. I did not go with an EWP, as I have read that they have trouble keeping up over 5000 RPM's, which would NOT be good at the road course.

I think a lot of drag racers use them, because of the small added HP bonus, and you can rig it to stay on after you shut the car off, to continue to circulate water through the engine, to cool the car off significantly between drag runs.

I would pass on this one. I think the downside out weights the small upside on this particular mod.

My $0.02.

-Chris

[ATLDon]

The drag racers that this was designed for also are not running an alt. they are using a gen to charge the battery between rounds.

[nmaier2201]

I joined this thread late... slacking I guess. To answer JohnnyV, since our motors are not specific to our cars, any LS6/LS2 based car would be in the search criteria for an electric pump swap. Just like Gundry and darkman said with the firebird thread. I have read different articles and the gains all vary from 5hp to 10hp…. I think I read a 12 or 13hp gain somewhere…. Of course I can’t find it now.

Meziere is the most widely used electric water pump for the LS engine so maybe a search on that would be fruitful. I think they have two models. One that pumps like 35gpm and another that pumps 55gpm. If my memory serves me correctly they pull right about 10amps. Belt routing is the same as the electic pump just has an idler pulley on it… so you shouldn’t have to switch out your belts.

I gotta disagree on the "not free" comment from submariner... (which is weird because usually everything he and darkman say make 100% sense to me). yes the battery is only used on startup, but it is not like it gets disconnected after the car is running. And yes the alternator shoulders the load of a running car, but the battery at that point is acting like a capacitor, it's not a paper weight. Now the alternator is running in a direct relation to PRM no matter what. It’s churning out 150amp no matter what... if you don't use it... it's wasted... if you do... ok no big deal. But the motor spins that alternator the same no matter what. So power isn't free because you got to spin the alternator... but that being said... unless your overloading the alternator and shortening it's lifespan.. it shouldn't matter how much power you use as long as it's not over the high water mark of what that alternator can produce.

Also the comment on seeing how it performed vs a mechanical pump w/ A/C on a hot day and such.. I wouldn't be overly worried about. If there wasn't some give in the flow numbers ATI wouldn't have a UD pulley that reduces the accessory speeds by 25% and I don't think Meziere would make a racing electric pump that couldn't handle cooling a racecar LS motor…. Still I would be curious on the gpm flow numbers of the AC Delco pump.

The only thing I would be worried about would be the CTS-V engine bay, size, fitment, and plumbing... that might be a little off from a f-body, vette, or a GTO.... pry no big worry... but still might want to check just to make sure

[nmaier2201]

I do have to agree that it might not be worth the small HP gain though.... I forgot to mention that.... but then again... if you have to replace it anyways.... why not do it?

[ATLDon]

Not sure what the reliabilty long term is of one of these pumps, I don't know if I would want to take the chance on the wifes kid hauler. I know people run them on street rods, but it all depends on what you do with the car. It's not like the OEM pump only last 5k.

[Scatillac]

For me, an electric water pump would be for a drag-only application. I would look at any of the endurance racing groups (ex. Katech, Pratt & Miller, Hendrick, etc.), either road or circle track, and see if these folks use them.

One of my friends has a Pro-Mod Camaro with a 572 BBC. He runs an electric pump on a total-loss system with no alternator. The car also has a tiny (Scirocco-type) radiator and the block is filled to within 1 1/2" of the deck. The car is primarily run in 1/8 mile events and he swaps out the battery between runs (putting the removed battery on the charger) unless he's in a round-robin mode, where he uses a mobile charger system in the staging lanes. He generally makes it into the finals, so these things are o.k. in his 1/8 mile format. In the later part of the summer the car has to be towed back to the staging area if he runs a 1/4 mile format.

I personally don't want 8 hp bad enough to sacrifice reliability (in a street or endurance application), no matter how trick it looks.

[nmaier2201]

Yeah I just looked on their site... I expected to see a "hour rating" for their pumps... but it wasn't published anywhere....the only thing I could find was a 2yr unlimited mile no questions warranty.....

I expected to see the hours those pumps were rated that.... Hmmmmmm

[JohnnyV]

Thanks for the advice... FYI: http://www.exoticperformanceplus.com....html?item=299