turbo 5.3L or 402

[greasemykey]

i want an honest opinion. should i build a 402 and drop it into my 2wd silverado or should i turbo the 5.3L i have now? i have a few bolt ons and a tune but i want power. i changed the rear to a detroit tru trac with 4.10 yukon gears. just asking an opinion and seeing which way to dump 4500 bucks.

[keniff]

front mount turbo imo bc you can always upgrade motors later vs spending 5k on a motor then another 5k on a turbo..id rather the front mount turbo now then build a motor later

[George C]

depends on what youre plans for setup is.

[CHEVROLADE]

motor swap

[SNEEKY]

motor swap. when you get tired or need more power from the 402 then put some spray on it. Thing will be fast with the right suspension setup

[randomhero]

For me personally I'd stick with the 5.3. With a 402 your gas mileage will go to crap, and I see so many people part their trucks out after doing a large displacement motor swap.

[greasemykey]

For me personally I'd stick with the 5.3. With a 402 your gas mileage will go to crap, and I see so many people part their trucks out after doing a large displacement motor swap.

gas mileage isnt an issue. i would drop an 8.1L in if there wasnt so much extra crap i would have to swap. i have a motorcycle and a new excalade i can drive instead of this thing if gas prices go up again.

who else besides sts makes a turbo kit. i found one other but they dont have the carb oe numbers. so every time i have to smog the truck i would have to take it off.

[smoothdime]

motor swap. that way if you decide spray or boost later the engine can handle it safely.

[kbracing96]

gas mileage isnt an issue. i would drop an 8.1L in if there wasnt so much extra crap i would have to swap. i have a motorcycle and a new excalade i can drive instead of this thing if gas prices go up again.

who else besides sts makes a turbo kit. i found one other but they dont have the carb oe numbers. so every time i have to smog the truck i would have to take it off.

I do, Nelson does, and Trick, but none of them have CARB approval. Only one is STS and its only on 01-05 I believe. AS far as what's better, depends on what you want to do with the truck. A 5.3 with about 7 psi of boost will make about the same power as a 408, but then you can turbo up the boost and make more power then a NA 408 if you want!

[4.8t]

i like my turbo 5.3l it makes my pig move pretty good. then again i do care somewhat what my mileage is. but down time on the install was way less than a motor build also.