These turbos can be had for relatively cheap and can still make power. Looking at the size, if 1 were mounted at the back, STS-style, there would be VERY LITTLE if any lag. It isn't the best for a very high power set-up, but I am more interested in low RPM power with very quick throttle response with as little loss of fuel economy as possible.

My truck made 255rwhp in 2nd gear through the stock intake. It seems like 5-6psi could get close to 350rwhp. That is more than enough for this truck. I am not looking to break anything.

I don't want to change the cam, converter, or 3.23 gears. Simply adding a small turbo for very mild boost seems like the best way to do everything I want.

 

any thoughts, comments, etc?

 

Do you know any of the specs on the turbo??

 

Aren't they a 70mm?

 

I found this posted on turbobuicks.com

2.75" = 60.85mm

 

Ive got one sitting here in my lap from what I believe is a 87 Grand National. It is a Garrett as says A/R .60 on the intake housing, underneath that is says M10.


On the exhaust housing it says A/R.63 and underneath that M3.

 

thats a small turbo for your 5.3L! but it will definitely get you your quick boost and torque that you're looking for...

 

DOH! I hit the 0 button instead of the 9. 2.75" ACTUALLY = 69.85mm

I'm wondering at what point would this turbo become a restriction? I definitely don't want to lose any power.

 

like 4 or 5lbs of boost would become a restriction they are around a 60 mm turbo me and my friend are putting one on his 2.3 l turbo ranger off his 1987 t type regal he upgraded to a 76 mm garret.

 

you will definately want more turbo than that! honestly.....i built a turbo system for a friends 4.8 using the mp70 at 13psi....another friend has a C5 vette with 2 stock GN turbos out back at 12psi lo boost! spend the cash initially on the mp70 or the mp76 and let it ride......