[rkupon1]

Hey guys, what factory radiator hoses have you found to work for your lsx swaps. Lookn for upper n lower part numbers if you have em. Im running the Entropy radiator and a Meziere EWP which prolly wont make a difference.

 

[TomM]

Lower would be a Gates 20450 I believe.....as for the upper, I just found two that I could cut and install the inline couple with a 1/4" npt fitting to run my temp gauge, don't remember the numbers on those. The steam vent goes into the radiator below the upper hose.

T,

 

[rkupon1]

Ok great, thank you. Do you also happen to know what size those 2 ports are on the entropy rad? Im gunna plug top one and use the lower one for my -4AN steam vent

 

[rkupon1]

Tom, curious why you are running temp gauge from the hose? Inline i assume? Im running factory lsx location from the cylinder head. N if i wasnt, id thought id use 1 of 2 ports on entropy radiator for it. Other being for the steam vent. Just curious is all.

 

[kcmocarguy]

Some LS folks say to put the temp sensor in the top of the water pump. I had it in the head like the factory and then drilled the boss on top of the water pump. The head would read so high that it scared me. The water pump was more even and I felt more accurate for the system.

 

[rkupon1]

Were the readings accurate in your opinion when located in the head? Im thinkn if factory wants it read at cylinder head, than so do i. But i could be very wrong.

 

[TomM]

Ok great, thank you. Do you also happen to know what size those 2 ports are on the entropy rad? Im gunna plug top one and use the lower one for my -4AN steam vent

The port under the upper hose is 1/4" npt. The two on the drivers side are for a trans cooler. I wouldn't use the lower one for the steam vent. It really should be at the highest part of the return, which is the upper hose, or water pump discharge, as that is the water coming out of the engine. I believe it gives you the best aggregate temperature of the engine.

Tom, curious why you are running temp gauge from the hose? Inline i assume? Im running factory lsx location from the cylinder head. N if i wasnt, id thought id use 1 of 2 ports on entropy radiator for it. Other being for the steam vent. Just curious is all.

Yes...inline. As I said above, it is the water coming out of the engine. I feel it represents the best actual engine temp, as the sender in the head can read as much as 30 degrees higher. I'm sure the OE's use this as a temperature go-by for fueling strategy, but I never cared for one there, as it is subject to latent engine/header heat....just my opinion....

Some LS folks say to put the temp sensor in the top of the water pump. I had it in the head like the factory and then drilled the boss on top of the water pump. The head would read so high that it scared me. The water pump was more even and I felt more accurate for the system.

Some folks do put it there. I don't care for it for a couple of reasons. On the remote chance that you lose a water pump, especially on the road, you have no place to put the steam vent.....

Also, upon replacement, you may not get your core money back with a hole in the pump. In the chance that they may weld the hole up on a rebuild and resell it, you might not be happy to get a replacement pump with a plug in it, or welded up.....again, just my preference.

T,

 

[kcmocarguy]

In line should be the same as the top of the water pump temp wise. You are correct the head was about 30 degrees hotter which was above my tolerance level. The head get really hot.

 

[rkupon1]

Gotya. Makes perfect sense. My Entropy rad does not have trans cooler ports. Just 2 ports under hose on passenger side.

 

[dont]

Hoses

The gates 20450 for the lower and gates 22997 for the upper hose worked well for me. LS 3 water pump and Entropy LS radiator. A little trimming needed on the ends.

 

[rkupon1]

DONT, do you have a better pic of that upper hose? Im running a meziere EWP n it has a deep neck on it

 

[dont]

Here is a pic of the water pump.

 

[dont]

Here’s the best pic I could get with out removing the intake tube. Steam vent port is right below the upper hose on the radiator. As far as the temp sensor mine is in the factory location in the head which I feel is the most important reading.

 

[rkupon1]

Yea got ya. We are gunna run it in head to for now n see how it does. I know its not uncommon for the lsx motors to run 225* n still be very healthy. Our strategy will be to turn the fans on sooner n pray these Entropy rads are worth more than thier good looks. Im NA 427, but aluminum block n a big radiator/fans will help. I did some research for my own knowledge n it turns out factory late model cars prefer to be ran alil hotter for the fueling/combustion process. Probably mostly for emmissions. The gen IV lsx series motors can stand the abuse in the sports cars n work trucks they are found in...long term typically.

 

[rkupon1]

DONT; nice clean build it looks like. Would luv to see more pics. Couple questions for ya
What kinda hp you puttn down with the ls3? How is your Entropy performing thus far?
Im gunna run my steam vent in same port as you did. I ll plug the other one below it. 1/4" npt? I think the model entropy rads we have are their newest models as the fan shrouds are different.

 

[dont]

I’m around 450 at the crank. I’ll be doing a Texas speed stage 2 cam swap next month. The Entropy radiator works awesome. I’m using their relay fan controller which gets it signal from the camaro computer. The 2 speed fans hold the temp around 200 degrees. Hottest I’ve seen is 210 in traffic with ac on.

 

[rkupon1]

I’m around 450 at the crank. I’ll be doing a Texas speed stage 2 cam swap next month. The Entropy radiator works awesome. I’m using their relay fan controller which gets it signal from the camaro computer. The 2 speed fans hold the temp around 200 degrees. Hottest I’ve seen is 210 in traffic with ac on.

Perfect. I also bought the relay kit. Gunna control it using holley dominator. Hopn to keep temps in check. Should be makn well over 700 crank.

 

[crucible]

Hoses

The gates 20450 for the lower and gates 22997 for the upper hose worked well for me. LS 3 water pump and Entropy LS radiator. A little trimming needed on the ends.

I could Kiss you right now. Thank you, this is what I was searching for!