Sizing turbo for slant 6 powerwagon

[gilberttitan08]

Hey guys I'd like opinions on sizing a turbo for a slant 6 75 dodge w100 paisa wagon club cab short box, It's gonna be stock internals, 4 barrel intake, holley 500cfm 2 barrel carb converted over to draw through, and 33" tires with 3.55 gears planning on going 4.10's later down the road. I have no idea on sizing this beast of a truck. My old man tells me a turbo and wastegate from a late 80's Buick GN 3.8 will be ideal. But I'd like other opinions before I grenade and blow my *** sky high.

 

[pishta]

sure, go out and find a Buick GN at a yard....Just get one thats sized for a modern 3L as the slant head flows pretty bad. I used a Supra CT-26 Turbo. Youll want to use a smaller turbo that spools faster as you wont be rapping over about 4500 in that beast. I bet a Mopar 2.5 turbocharger would fit the bill.

 

[gilberttitan08]

What about T3/T4's?

 

[stop the beast]

Hey guys I'd like opinions on sizing a turbo for a slant 6 75 dodge w100 paisa wagon club cab short box, It's gonna be stock internals, 4 barrel intake, holley 500cfm 2 barrel carb converted over to draw through, and 33" tires with 3.55 gears planning on going 4.10's later down the road. I have no idea on sizing this beast of a truck. My old man tells me a turbo and wastegate from a late 80's Buick GN 3.8 will be ideal. But I'd like other opinions before I grenade and blow my *** sky high.

A stock engine won't have any issue spinning up any of these turbos. They are okay picks but I would recommend a T3/T4 50 trim or 60-1. These will run much lower pressure and make more power.

As for the gears, I'd go with a much higher gear for any of these turbos, nothing over 3.55 unless you're planning on hauling or crawling. I use the 2.76 in my a-body turbo setup. When I was using a smaller turbo, peak boost was at 1,800 RPMS. The lower gears help you take advantage of the enormous low-end power and run it out longer in between shifts. Even a built turbo slant with a gutted head will loose its breath at 5K rpm. I'm not familiar with running tires that tall but consider the higher gearing with that.

What about T3/T4's?

 

[Dave Yacenick]

A stock engine won't have any issue spinning up any of these turbos. They are okay picks but I would recommend a T3/T4 50 trim or 60-1. These will run much lower pressure and make more power.

As for the gears, I'd go with a much higher gear for any of these turbos, nothing over 3.55 unless you're planning on hauling or crawling. I use the 2.76 in my a-body turbo setup. When I was using a smaller turbo, peak boost was at 1,800 RPMS. The lower gears help you take advantage of the enormous low-end power and run it out longer in between shifts. Even a built turbo slant with a gutted head will loose its breath at 5K rpm. I'm not familiar with running tires that tall but consider the higher gearing with that.

What's the make of your turbo and what kind of internals are using??? connecting rods, pistons, cam,valves ..be greatly appreciated thanks Dave