Dirtleg
Full Access Member
So almost 10 years ago I decided I would build a hi-po 6.9. I had picked up 2 6.9's with bad head gaskets locally for a song. They even came with a complete gasket kit and an IP of unknown condition.
In 2008 there weren't a lot of proven high HP IDI's out there. I'm thinking there was a Dave S guy and a Ken DPS guy that had both built strong engines at the time but no idea what the actual HP/torque was on them. I had read up on their engines a little but wasn't trying to copy them. Some details might be similar but it's an engine. There's only so much different you can do.
I had decided to build it a certain way. The specifics would be:
Reduced compression. .050 milled from the piston tops. I felt that a lowered compression would allow for higher boost (ie more oxygen) without lifting the heads.
ARP studs. I much prefer the way a stud works to a bolt. Regardless of strength. But studs are usually stronger as well.
Ported heads. I knew the thoughts of this being unnecessary but decided to do it anyway. For science.
Moose pump. I had purchased one from @Agnem in November of 2007. It was still in it's sealed bag back then.
Ford ATS 093 factory kit. Found it on the bay and rebuilt the turbo. Was going to be my starting point.
NOS 2000 Powerstroke intercooler. Friend had it. We did some horse trading and I ended up with it.
I also went ahead and got a new set of matched injectors from Typ4.
First thing was pistons. I found a new set of sealed power 6.9 pistons .040 over on the bay for $200. So those were purchased. Then I had .050 milled from the tops of them. Here is one after milling.
Then I took the block and crank to the machine shop to have the cylinders bored out for the pistons.
Not a great picture but all my pictures of the bored cylinders are blurry for some reason.
I did some head porting as well. A picture after finishing one of the ports.
I also did a little blending around the valve guide. This may or may not have been a good idea but again, Science.
continued........
In 2008 there weren't a lot of proven high HP IDI's out there. I'm thinking there was a Dave S guy and a Ken DPS guy that had both built strong engines at the time but no idea what the actual HP/torque was on them. I had read up on their engines a little but wasn't trying to copy them. Some details might be similar but it's an engine. There's only so much different you can do.
I had decided to build it a certain way. The specifics would be:
Reduced compression. .050 milled from the piston tops. I felt that a lowered compression would allow for higher boost (ie more oxygen) without lifting the heads.
ARP studs. I much prefer the way a stud works to a bolt. Regardless of strength. But studs are usually stronger as well.
Ported heads. I knew the thoughts of this being unnecessary but decided to do it anyway. For science.
Moose pump. I had purchased one from @Agnem in November of 2007. It was still in it's sealed bag back then.
Ford ATS 093 factory kit. Found it on the bay and rebuilt the turbo. Was going to be my starting point.
NOS 2000 Powerstroke intercooler. Friend had it. We did some horse trading and I ended up with it.
I also went ahead and got a new set of matched injectors from Typ4.
First thing was pistons. I found a new set of sealed power 6.9 pistons .040 over on the bay for $200. So those were purchased. Then I had .050 milled from the tops of them. Here is one after milling.
You must be registered for see images attach
Then I took the block and crank to the machine shop to have the cylinders bored out for the pistons.
Not a great picture but all my pictures of the bored cylinders are blurry for some reason.
You must be registered for see images attach
I did some head porting as well. A picture after finishing one of the ports.
You must be registered for see images attach
I also did a little blending around the valve guide. This may or may not have been a good idea but again, Science.
You must be registered for see images attach
continued........
