What turbos for 441 LSX?
Thread Starter
Teching In
Joined: Jun 2015
Posts: 20
Likes: 0
Could you not go for an air to air intercooler? Any air to water setup will heat soak over time. With a decent sized air to air unit you can mitigate some of this and also get much quicker recovery times. It does require the intercooler to be mounted in a location with good airflow. Also you need to think about where you radiator and oil cooler are located and try to reduce any impacts you might have on them.
Got any pics of your truck? Is you radiator / oil cooler mounted at the rear?
Got any pics of your truck? Is you radiator / oil cooler mounted at the rear?
Heat exchanger for water/air intercooler, radiator, and trans/oil coolers will all be rear mounted. I'm having a local shop build me a short 2 inlet to single outlet air/air intercooler between turbos and intake, for any heat soaking problems and for a backup incase a roll or bounce breaks the heat exchanger or pump.
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Why use an air to air as a backup and not the primary? Your not going to break an air to air and it will be more efficient. Just look at all the endurance style race series out there using turbo engines, very few cars are using air to water intercoolers. F1, Le Mans, WRC, WTCC, they all use air to air intercoolers. And there is a reason. 
The only one I can think of would be the MacLaren GT3 cars. I'm not even sure if they do use air to water intercoolers (the road cars do). Everything else out on track wil use air to air!
The only one I can think of would be the MacLaren GT3 cars. I'm not even sure if they do use air to water intercoolers (the road cars do). Everything else out on track wil use air to air!
Thread Starter
Teching In
Joined: Jun 2015
Posts: 20
Likes: 0
Why use an air to air as a backup and not the primary? Your not going to break an air to air and it will be more efficient. Just look at all the endurance style race series out there using turbo engines, very few cars are using air to water intercoolers. F1, Le Mans, WRC, WTCC, they all use air to air intercoolers. And there is a reason.
The only one I can think of would be the MacLaren GT3 cars. I'm not even sure if they do use air to water intercoolers (the road cars do). Everything else out on track wil use air to air!
The only one I can think of would be the MacLaren GT3 cars. I'm not even sure if they do use air to water intercoolers (the road cars do). Everything else out on track wil use air to air!
Thread Starter
Teching In
Joined: Jun 2015
Posts: 20
Likes: 0
Its a 2003 silverado 1500 single cab with the rear half of the frame cut off and a big hole in the cab where the firewall use to be and no fenders right now...
Nothing special yet. When I gain some good progress, ill start a thread of the build on an offroad forum. Ill put the link here when i do
Nothing special yet. When I gain some good progress, ill start a thread of the build on an offroad forum. Ill put the link here when i do
TECH Apprentice
Joined: Jan 2014
Posts: 362
Likes: 1
From: Torrance Ca
If your heat exchanger fails or gets heat soaked wouldnt it be heating up the air your air to air intercooler just cooled down? Seems like an accident waiting to happen. For desert racing and extended periods of time at WOT, it seems as though the water to air would have a tough time keeping up. Only a suggestion though, its your truck!
Thread Starter
Teching In
Joined: Jun 2015
Posts: 20
Likes: 0
If your heat exchanger fails or gets heat soaked wouldnt it be heating up the air your air to air intercooler just cooled down? Seems like an accident waiting to happen. For desert racing and extended periods of time at WOT, it seems as though the water to air would have a tough time keeping up. Only a suggestion though, its your truck!
This is why I'm a firm believer in asking other people who know what they are talking about.
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Big air to air for the win! 
Just make sure it's over speced. Don't be putting in a little 6 inch high core. Make it as big as possible. If you radiator is going to be rear mounted then you won't have to worry about the intercooler blocking airflow to it.
Just make sure it's over speced. Don't be putting in a little 6 inch high core. Make it as big as possible. If you radiator is going to be rear mounted then you won't have to worry about the intercooler blocking airflow to it.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
If your heat exchanger fails or gets heat soaked wouldnt it be heating up the air your air to air intercooler just cooled down? Seems like an accident waiting to happen. For desert racing and extended periods of time at WOT, it seems as though the water to air would have a tough time keeping up. Only a suggestion though, its your truck!
Fix is simple, build it with more capacity than it will ever need, then it will always have good cooling ability within it's operating environment
A bad setup is a bad setup whether its air or water used as a cooling medium.
Each can have it's ow benefits though.
On the positive side for a water based system, and if you are saying there is lots of slow speed stuff...ie low airflow. Then you could use an aircon system to try and assist water cooling for the charge cooler unit.
Other than that then you'll need fans with enough airflow to try and keep things as cool as possible, but that applies whether it's water or air.
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366 is a great turbo. But bigger size so check your spacing
Else i'd look at a turbonetics hurricane, 6668 or something around that. Very compact. Good price. Spool very fast and be plenty for up to 1000.
I got the 7268 on my 400 and they work great.
Plus its hard to beat turbonetics warranty and service! I had an accident and they took care of me no questions asked
Else i'd look at a turbonetics hurricane, 6668 or something around that. Very compact. Good price. Spool very fast and be plenty for up to 1000.
I got the 7268 on my 400 and they work great.
Plus its hard to beat turbonetics warranty and service! I had an accident and they took care of me no questions asked
Thread Starter
Teching In
Joined: Jun 2015
Posts: 20
Likes: 0
366 is a great turbo. But bigger size so check your spacing
Else i'd look at a turbonetics hurricane, 6668 or something around that. Very compact. Good price. Spool very fast and be plenty for up to 1000.
I got the 7268 on my 400 and they work great.
Plus its hard to beat turbonetics warranty and service! I had an accident and they took care of me no questions asked
Else i'd look at a turbonetics hurricane, 6668 or something around that. Very compact. Good price. Spool very fast and be plenty for up to 1000.
I got the 7268 on my 400 and they work great.
Plus its hard to beat turbonetics warranty and service! I had an accident and they took care of me no questions asked
I got all the space in the world lol. Might as well stick 2 turbo engines in there for the wow factor
On The Tree
Joined: Apr 2006
Posts: 118
Likes: 0
Built a couple N/A ls7 and lsx 454's for some buddies cars and trucks.
This will be my first FI build, going in my personal stock frame prerunner...
Current Parts-
lsx tall deck block (will be 0 decked to about 9.3)
Callies Magnum XL crank 4.125" stroke
Callies Ultra I-beam rods
ARP head and Main Studs
Billet main caps
Diamond Pistons 4.125 bore 25.3cc dish 1.115 comp height
Still havent decided on heads or cam yet.
I also have 2 water/air intercoolers and dual 75mm throttle bodies to make custom cross ram intake.
I'm looking for around 900-950hp reliably with a flat torque curve to 7000rpm. What dual turbos would you recommend for fast spool at lower rpm and still have enough flow at the top end?
How much boost?
I also know nothing about different EFI controllers, I always just go stock or carbureted. Any Recommendations?
This will be my first FI build, going in my personal stock frame prerunner...
Current Parts-
lsx tall deck block (will be 0 decked to about 9.3)
Callies Magnum XL crank 4.125" stroke
Callies Ultra I-beam rods
ARP head and Main Studs
Billet main caps
Diamond Pistons 4.125 bore 25.3cc dish 1.115 comp height
Still havent decided on heads or cam yet.
I also have 2 water/air intercoolers and dual 75mm throttle bodies to make custom cross ram intake.
I'm looking for around 900-950hp reliably with a flat torque curve to 7000rpm. What dual turbos would you recommend for fast spool at lower rpm and still have enough flow at the top end?
How much boost?
I also know nothing about different EFI controllers, I always just go stock or carbureted. Any Recommendations?
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