prepping a 6.2 for a turbo

[84CUCV]

is there anything that needs to be done before i do this? the pick up is getting a 6.5 kit and the k5 is getting a banks kit. one with 26k and the other one with 44k

thanks

 

[K5dreamer]

i dont know anything for sure, but my guess is the banks kit will be alright, the 6.5 setup may pump too much air as those engines had a 17:1 or 18:1 compression vs the 6.2 diesels 21.5:1 compression.

 

[Wrench]

The 6.2's were 21.5:1 compression; the 6.5TD's were 20.5, and the biggest difference was in the size of the pre-cup. 6.5's never came stock with 18:1 compression. Neither of the turbos will "pump too much air."

Unknown on the Banks kit, but the 6.5 turbo oil drain goes where the mech. lift pump is now. Easy route is to replace the pump with an electrical pump. Tough route is to install some kind of fitting for 5/8 hose nipple in the oil pan and custom drain, but lets you keep your lift pump.

The 6.2 block, unless it is the late '90-93 599 block, does not have the same provisions for the pressure oil feed line for the turbo. I don't know how the Banks kit gets its oil, but I'm planning to use a T fitting in the oil pressure sensor hole at the back of the block, run the sensor off one side and the oil feed off the other side.

You will want to turn the injection pump up a bit to make the best use of the turbo. Easiest way to do this is to take off the triangular plate on the driver's side of the pump, rotate the pump until you can see the Allen screw through the hole under the plate, and use a 5/32 Allen key to turn the pump 1/8 to 1/4 turn clockwise.

6.5 kit will require some exhaust rework. I think the Banks kit comes with new clamp-together pieces.

 

[K5dreamer]

oh wow, thanks for the catch, i had always read about using 6.5TD pistons for a 18:1 compression..... didnt realize the two were so close, where did the 18:1 compression pistons come from?

 

[84CUCV]

thanks for the help

 

[longbedder]

If you get a *complete* Banks kit, you don't need anything at all. It's very comprehensive and has every little part to make it work.

The problem is the kits from the manufacturer are upwards of $2k, and you have to look real hard to find a good complete one used - most are missing pieces.

The Banks kit taps in either by the oil filter housing or tees off of the oil pressure sending port on the back of the block. Return is through the lift pump plate (supplied with kit).

 

[Wrench]

oh wow, thanks for the catch, i had always read about using 6.5TD pistons for a 18:1 compression..... didnt realize the two were so close, where did the 18:1 compression pistons come from?

Peninsular builds an 18:1 marine engine, many have done the same thing by various methods b/c a lower compression engine holds up better with more boost. It's really only beneficial if you're racing/sled pulling, etc.

 

[Wrench]

If you get a *complete* Banks kit, you don't need anything at all. It's very comprehensive and has every little part to make it work.

The problem is the kits from the manufacturer are upwards of $2k, and you have to look real hard to find a good complete one used - most are missing pieces.

hmmm, so the brand new complete in box 6.2 Banks turbo kit for $1500 advertised locally is a good deal eh?

 

[longbedder]

hmmm, so the brand new complete in box 6.2 Banks turbo kit for $1500 advertised locally is a good deal eh?

I would say yes, comparatively...especially if it's Canadian $$