Im working on a 1991 C1500 with a stock 5.3 and S475/83 Turbo that is Water/Air Cooled.

The truck has a 4.3 radiator that keeps the engine plenty cool for Daily Driving.
Ive found out that a honda civic radiator will fit beside it if i slide the 4.3 radiator all the way to the passenger side, which is no problem to do.

I know most folks run a decent size heat exchanger but this radiator will be 15" x 14" x 1.5". I see the Magnacharger Heat exchanger is 24"x8" So its comparable size.
Ill be running as low of boost as i can for awhile since i just need it running so 5-6 psi for now, just looking for easy options and keep it simple and i dont have hardly any room to work with infront of the AC Condenser between the grill.

2 row Alum radiator is only $50, Factory Fan is $30 if i ever need it. Just have to keep an eye on the IATs and see what happens if i go that route.

Good idea or horrible idea?

 

You need to run an intercooler not a HX, the the turbo should be worded as water cooled and oil lubricated. And you just need to plumb the turbos water ports inline with the engines heater core lines to cool the center cartridge


It’s also a waste of space/time/money to put a second radiator in the truck just to cool the turbo. You would also need a remote water pump to circulate the coolant

 

I see my mistake in the first post. It should say intercooled not cooled. Rookie Mistake

I already have the cold side plumbed up with a Water/Air Intercooler,
I also have a Johsnon CM30P7 pump that ive used on a previous setup with this intercooler and a no name Heat Exchanger. My issue is the space i have for a heat exchanger is limited.
And if i ran this small radiator i wouldnt "need" a reservoir since it has a filler neck. The size of the core is comparable to the magnacharger truck heat exchanger so in theory it should work as good?

 

Yeah, that honda radiator would make for a great heat exchanger for your water/air intercooler. Plenty of capacity for the low boost you're running.

 

thanks for the reassurance.
I'll give it a try. The intercooler I have prolly isn't​ going to flow a whole lot. The dimensions are equal to the 500hp one on frozen boost site.
I'll run as little boost as I can till I have time to upgrade.

 

Perhaps I’m not seeing the picture here

Turbos are required to have an intercooler to help lower the IAT’s

Roots blowers use HX’s for same purpose

Are you trying to use the honda radiator and secondary water pump to help keep the turbo cool and just bypass using the factory water pump/engine coolant as the source of the cooling?


Either or your IAT’s are going to come from ambient air temps and intercooler capabilities, spraying meth can help you keep the combustion temps down as well

 

Correct. I already have a Water/Air Intercooler plumbed in the cold side piping (Roots have a Water/Air Intercooler under them before air goes into the cylinders).. The Water/Air Intercooler in both setups need a way to exchange the heat. (I know you know this, just trying to be indepth)
The small radiator will be my heat exchanger for the water intercooler. The S475 doesnt have provisions for water cooling anyway.

The system will be plumbed like this.
Small Honda radiator - Johnson water pump - Water/Air Intercooler- back to Small Honda radiator.

The 4.3 Radiator will be cooling the engine coolant.
2 separate systems

Dont think of the Small honda radiator to cool the turbo.

 

I understand, you want to cool the water/air intercooler water. The Honda rad should be just fine. And you had me a bit lost, when your said you turbo size. I knew they didn’t come with water fittings. Hence the scratching of the head lol

It’s all good, posts can be confusing at times

 

Ha, sorry about that. I should have worded it differently now that i went back and reread it...