6.2 to GEP 6.5 swap

[ken]

I finally got my NOS power pack in. I'm stoked. It's time to pull the 6.2 and convert this 6.5 to NA then get it on the road. First thing first. Pull the tranny off and get it up on the engine stand.

 

[orgnal]

I finally got my NOS power pack in. I'm stoked. It's time to pull the 6.2 and convert this 6.5 to NA then get it on the road. First thing first. Pull the tranny off and get it up on the engine stand. View attachment 700169View attachment 700171View attachment 700170

Congratulations!

McReddy

 

[orgnal]

I finally got my NOS power pack in. I'm stoked. It's time to pull the 6.2 and convert this 6.5 to NA then get it on the road. First thing first. Pull the tranny off and get it up on the engine stand. View attachment 700169View attachment 700171View attachment 700170

Why would you not want to leave the turbo on? What kind of transmission is it hooked to right now?

McReddy

 

[gimpyrobb]

How do you plan or doing the conversion? I know some drill out the bolt holes in regular intake manifolds and some swap out the heads.

 

[ken]

I got a set of NOS N/A heads from 86hummvw so I won't be having to do any modding to the intake. I'm going to get flamed for not using the turbo but it comes down to costs. I've got a lot tied up in it already. The truck will spend 99% of the time unloaded and on back streets so i'm ok with less power. There is a 4l80e 4 speed on it now, but I'll be using the turbo 400 3 speed that is in the truck now. I'll also swap the vbelt parts from the 6.2 onto it. I'll turn the fuel rate down to keep the EGT's down with out a turbo.

 

[orgnal]

I got a set of NOS N/A heads from 86hummvw so I won't be having to do any modding to the intake. I'm going to get flamed for not using the turbo but it comes down to costs. I've got a lot tied up in it already. The truck will spend 99% of the time unloaded and on back streets so i'm ok with less power. There is a 4l80e 4 speed on it now, but I'll be using the turbo 400 3 speed that is in the truck now. I'll also swap the vbelt parts from the 6.2 onto it. I'll turn the fuel rate down to keep the EGT's down with out a turbo.

Almost feels like you have the setup I want and I have the setup you want. I have the 6.5L GEP NA with 3 speed. Have been longing for a 4 speed.

McReddy

 

[ken]

I could see you needing a turbo and 4 speed at such a high elevation.

 

[Action]

I think I will save you some money....if you put v-belts on that, you need to change the water pump. It turns the opposite way from the v to serpentine.

 

[86humv]

I think I will save you some money....if you put v-belts on that, you need to change the water pump. It turns the opposite way from the v to serpentine.

And the water pump backing plate.
Don't put that used WP from the 6.2 on there...get a new one.
Don't reuse your head bolts

 

[ken]

I picked up a new water pump from Rockauto a couple weeks ago. Along with new head bolts and .010 thicker head gaskets. The NA heads took a few dings in shipping right where the fire ring goes so I had to resurface them. I wanted to use studs but $200 for a set was a little over the top. I was planning on inspecting the backing plate on the 6.2 but if it's pitted too much I will find another one. I still have to make a turbo return block off plate and a plug for the crank position senser. Hopefully I will have it on the stand tomorrow.

 

[jackson76550]

What is your plan for the turbo feed and drain holes? I just added all the turbo stuff to mine, id be interested in the turbo parts, heads, trans etc if the price is right. Im just down the road in sealy

 

[jackson76550]

What is your plan for the turbo feed and drain holes? I just added all the turbo stuff to mine, id be interested in the turbo parts, heads, trans etc if the price is right. Im just down the road in sealy

Ok i read it, I can tell you this seals on an engine that was not machined for the turbo.

 

[Retiredwarhorses]

To each his own, but why you wouldn't just put the motor in as is puzzles me....other then a minor body cut, it will drop right in. i would also use the serpentine setup, it's easier to maintain and more options available.
seems you can find someone who would trade you straight across for exactly what you want....instead of hack up a good turbo setup, which I want to remind folks, aren't getting easier to find now that Southern metals is done with the contract.

 

[ari]

I would trade my 6.5 gep na for the turbo 6.5

 

[Havok]

To each his own, but why you wouldn't just put the motor in as is puzzles me....other then a minor body cut, it will drop right in. i would also use the serpentine setup, it's easier to maintain and more options available.
seems you can find someone who would trade you straight across for exactly what you want....instead of hack up a good turbo setup, which I want to remind folks, aren't getting easier to find now that Southern metals is done with the contract.

I agree 100%. Its probably going to be more of a pain switching it to NA as well. Everyone wants the 6.5 turbo set up with a 4 speed!

 

[ken]

I got the tranny off and am about to get it up on the stand. I'll probably post in the classifieds the stuff I won't be using. I was surprised to see all the balance drilling on the flexplate/flywheel. Hopefully it will be a smooth runner.

 

[gimpyrobb]

Hey, I have new torque converters for the th400 if you decide you want/need one.

 

[ken]

Thanks Man but I already have a new one from a older CUCV project that didn't get used. The 6.2 in there now has a cracked flywheel so I figured somebody has been doing "netural drops" with it. I've seen guys rev them up in netural then drop it into drive to try to spin the tires. It flattens the fins in the torque converter and cracks the flywheel.

 

[Skrilex]

This reminds me of a prank phone call to the pizza joint where you order a supreme, but hold the peppers, onions, sausage, oilives, and hold the cheese, sauce, and no dough.

 

[ken]

I listed the parts I won't be using in the classifieds.