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lt4ever
12-20-2005, 07:58 AM
I know this has been discussed to great lengths and I've even seen previous posts on the subject here, but can't recall them now, nor is a search fruitful when you type in "Electric Water Pump".

What are the CONS of running an electric water pump? In other words, what do you need to be mindful of? (high volume, high pressure, :boobies: get better battery, better amp alternator for increased amperage load???) Also, is it really worth it? For $350, does it free up that much power? :boobies:
lt4ever
12-20-2005, 07:59 AM
plz excuz my childish fascination w/ boobies....
5.0THIS
12-20-2005, 04:41 PM
They can fail suddenly and leave you stranded. Some people dont get good life out of them. The only advantage IMO is being able to use a standard type double roller timing chain. Only frees up 5-7 hp.
Ed Blown Vert
12-20-2005, 05:18 PM
I don't know if they are worth it. I used one because I want to cool down the engine quickly at the track without starting the engine.
5.0THIS
12-21-2005, 04:05 AM
I don't know if they are worth it. I used one because I want to cool down the engine quickly at the track without starting the engine.


And that would be IMO the biggest advantage of one... being able to keep coolant flowing without the engine running. A helpful feature if you have a car that sees alot of drag time.

If you do any other kind of racing with sustained high rpms such as autocross or road course, then stay away from EPs. They wont flow as much as a stocker, especially under such conditions, or so I've heard.
lt4ever
12-21-2005, 08:09 AM
Sounds good to me... didn't really want to drop another $350 anyway.
CJDZ24_Z28
12-25-2005, 06:20 PM
I had a CSI on one of my past Z28's lasted 2 years. The car had 184,000 when i sold it. I will def. buy another Good Luck!
lt4ever
12-27-2005, 08:09 AM
So wait a minute.... you're telling me that you bought an electric water pump and it only lasted 2 years and you will def. buy another

????? :slap:

What am I missing??? That sounds horrible. I'd rather stay with the stock mechanical pump and perhaps replace an impeller seal for a few bucks along the way and have it last indefinately.
CJDZ24_Z28
12-27-2005, 10:02 AM
No it lasted the 2 years after i installed it and sold the car. Its prob still running to this day:)
lt4ever
12-27-2005, 10:20 AM
I don't know if they are worth it. I used one because I want to cool down the engine quickly at the track without starting the engine.

Ed- what kind of roller chain are you using? Is it a double roller or something a little better than stock like the LT4 extreme duty timing chain? At what point does the power output of the engine require a better timing chain? I'm currently in the process of building a blown 383. Would hate to stretch/ break the timing chain when I could've replaced it while the engine is a part...
Ed Blown Vert
12-27-2005, 10:22 AM
Ed- what kind of roller chain are you using? Is it a double roller or something a little better than stock like the LT4 extreme duty timing chain? At what point does the power output of the engine require a better timing chain? I'm currently in the process of building a blown 383. Would hate to stretch/ break the timing chain when I could've replaced it while the engine is a part...

I run the stock LS2 chain.
lt4ever
12-27-2005, 10:33 AM
Oh yeah that's right, you've got an LS based engine. How much more difference in tensile strength/ stability would you think the LT4 extreme duty timing chain (my current chain) and the stock LS2 chain have? Any ideas??
roughneck427
12-27-2005, 01:16 PM
I put a meziere on my 95 and i traded out to a double roller chain cloyes clo-9-3145 i did have to clearence my timing cover nothing major works great but you have a 96 and a crank sensor you have to ditch the sensor and have a tune disabling the crank sensor to get rid of the reluctor ring
Ed Blown Vert
12-27-2005, 01:19 PM
Oh yeah that's right, you've got an LS based engine. How much more difference in tensile strength/ stability would you think the LT4 extreme duty timing chain (my current chain) and the stock LS2 chain have? Any ideas??
Opps, I forgot I was in the LT1 section ;)
lt4ever
12-27-2005, 01:49 PM
you have a 96 and a crank sensor you have to ditch the sensor and have a tune disabling the crank sensor to get rid of the reluctor ring

I thought that was an essential sensor the PCM needed for engine management.
roughneck427
12-27-2005, 02:22 PM
not if you convert your pcm to obd1 then you dont have any downstream o2's or the crank sensor the crank sensor kinda helps out when you have a missfire it will tell you what cylinder is missing when you get an ses light,thats why with a obd1 system you never get a specific cylinder misfirse because no crank sensor other than that thats all its good for IMO pcm for less can delete it thats where i got my tune
lt4ever
12-27-2005, 02:29 PM
Already deleted the downstream O2's.... but hmmm, food for thought.
lt4ever
12-27-2005, 02:31 PM
Opps, I forgot I was in the LT1 section ;)

What!? Don't even care to wager a guess to an LT1 bastard step child?
5.0THIS
12-27-2005, 07:44 PM
Oh yeah that's right, you've got an LS based engine. How much more difference in tensile strength/ stability would you think the LT4 extreme duty timing chain (my current chain) and the stock LS2 chain have? Any ideas??


The LT4 ED chain set is good. You will be good to go with either that setup (if you want to keep a mechanical water pump) or a good standard SBC double roller (any name brand one will be a stout piece) if you will switch to an electric pump. I would definately get one or the other though as it will be a blown engine with an already increased load on the crankshaft.
5.0THIS
12-27-2005, 07:45 PM
Opps, I forgot I was in the LT1 section ;)


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:toetap: :nono:
Ed Blown Vert
12-27-2005, 09:21 PM
:sorry:
5.0THIS
12-27-2005, 11:29 PM
:p :D
lt4ever
12-28-2005, 07:39 AM
The LT4 ED chain set is good. You will be good to go with either that setup (if you want to keep a mechanical water pump) or a good standard SBC double roller (any name brand one will be a stout piece) if you will switch to an electric pump. I would definately get one or the other though as it will be a blown engine with an already increased load on the crankshaft.

Thanks... I wonder if chain stretch will be minimal on my current LT4 ED chain. It only has between 7,000 to 9,000 miles on it. I want to just swap it over to the new engine.