I think I'll be going STS style with the turbo underneath the the body. I'm hoping I can find room somewhere closer to the front to mount it. If not, I may just go classic style and cut the muffler out and install the turbo in its place.
Tim was kind enough to point me at a turbo for sale locally. I'm checking it out now. I sent the specs to James Henson to see what his thoughts are.
Here's the specs:
t4 F1-68 turbine .68 a/r housing 3" exhaust outlet with a 72mm compressor blade 4inch inlet, 2.5 inch outlet, journal bearing. Also, see compressor map attached. I have a vague understanding, and that concerns me.
Now, the next issue is oil routing.
Oil in to the turbo would be handled from a T off the oil pressure sending unit on the block. Return oil would need a scavenge pump to the top of the oil pan, or in the timing chain cover. The scavenge pump adds quite a bit of cost to the setup. I think saving a few bucks in this area would spell disaster. So, this seems to be the best pump out there:
Stainless steel oil lines will have to be used. As I read about under cab mounted turbo's oil issues seem to be a huge issue. This is going to require careful thought and routing.
My real issue is routing the air filter and compressed air up to the engine bay.
The frame rails will be the the way. I saw one guy notched out his frame for the plumbing and re-enforced the frame by welding metal around the plumbing line (3 inch or 4 inch hole). I'm concerned about running the two pipes and think this will be the biggest challenge. I really don't want that air filter under the truck.
See what this guy did on his ranger?
As for Maf? Pro-M all the way, in a blow thru design.
Fuel pump, injectors, sct go without saying. I'll be having James put together a care package for me along with the Pro-M.
Aeromotive Stealth 340 pump
Bosch uscar (EV6) 60lb injectors part # 108191
I'll recycle my boost gauge and wide band o2 from my supercharged 4.0 ohv.
I'll be using stainless steel for everything under the truck as rust always seems to be an issue.
Also. intercooling. I learned from my last project that cool intake air is incredibly important. People say on under cabin turbo's you don't really need it as the compressed air cools on the way up. Not good enough for me. Im going to go air/water so I have flexibility as to where I mount the intercooler. This could change, but intercooling of some form is a must.
My eye's are watering at what this is going to cost.
I see 02Limited turbo'd his, but he must have had quite a few issues and fell off the forum.
Not much info on guys completing something like this to be found. All input appreciated.
This will be a long process.