C5 for life

With only 2 pieces left being the NW 102 TB and a sufficient water pump without going EWP. Looking for a suggestion from anyone with experience with a high flow water pump to support parts list as follows :

Parts list :
AFR220 fully ported mamofied heads milled 59cc 11.62 to 1 compression
Yellaterra 1.7 roller rockers/10mm upgraded stud.
Ported fast 102 intake
Custom grind cam 227
Johnson slow leak down lifters
36lb injectors
OEM LS7 clutch
Cloyes timing chain
Tony Mamo Ported oil pump

Current upgrades :
Vararam CAI
1 7/8 long tube headers HF Cats
Ti axle back

04 C5 Targa 6 speed 50k miles
Thanks
-Mark

Fastbird

Factory water pump is more than sufficient.

YO-EL

Evans

vettenuts

I have a similar setup and am using the stock water pump. I do, however, have a DeWitts radiator. I wouldn't use a EWP for two reasons. First is reliability. Second, they pump a fixed flow rate that is adequate most of the time but they flow less at high RPM.

C5 for life

Interesting. I guess I’m stuck on overall upgrade to support the added power. Also trying to eliminate the need to park it for another short time to do more work if needed. I have heard one experience with upgrading to these particular heads that engine was running hot. When it was mentioned that with the upgrade the water pump was not upgraded. I’m $6,500 in the hole. Another 4-500 for the Edelbrock Victor high flow water pump, certainly couldn’t hurt. Anybody disagree ?

How much did the Dewitt’s radiator cost you ?

thanks for the responses guys

YO-EL

Evans high flow LS1 water pump and DeWitts radiator with dual Spal 3600 cfm fans is the ticket.
Never failed in my C5, 19 yrs hot lap drag racing and street/turnpike driving..
Temp never got past 180

Spaggs

I did a lot of research and I picked the Edelbrock 8896. You can switch out the guts and replace it with the 8897 cartridge if/when the pump goes bad and not have to replace the whole pump. The only downside is you have to purchase their 8898 pulley for an additional $110.00. I'm a sucker for stuff made in the U.S.

Good luck.

Spaggs

neutron82

the stock water pump has worked fine for me too, personally I would be more inclined to upgrade the radiator and fans before the water pump

vettenuts

Not sure what your plans are for the car, but the water pump is more than adequate for a 1/4 mile run. If you were running high RPM on a track it might be another matter. If you are worried about sitting in traffic, the larger radiator would be a bigger benefit. The money for the water pump would pay for a good portion of a DeWitts if you are concerned. Personally, I would put the motor together and see where you are. If the car is running hot that consider a new radiator.

vettenuts

Have you spoken to Tony about your concerns? I have never had issues with my AFR heads that Tony worked over for me. I would question the one person who had an overheat issues, i.e., how motor was assembled, gaskets, etc. First I have ever heard anyone mention a heat related issue with AFR heads.

cas9889

I was told the ls3 water pump flows a little more than the ls1 pump

C5 for life

You got a good point. Honestly the guy complaining was a bit overzealous in his concerns. Quick to blame the heads rather than take the time to properly eliminate the issue. No, i haven’t spoke to Tony about the probability of needing a bigger or better water pump. To be honest I don’t like to beat up his E mail with every single concern I may have. Tony’s slammed day and night with legit critical matters. I do like the idea of a bigger radiator though. Thanks 👍🏻

gimp

What does your oil temp get to with this setup? Both the hottest temps, but also, the normal cruising temps.

YO-EL

Hottest I've ever seen was oil, 218, coolant 190, hot lapping like 4-5 runs in a row in 95 degree heat
Cruising was oil 212 and coolant 180-185 (160 thermostat)

The Evans DeWitts Spal combo worked great!

gimp

That sounds solid. Nice!