max boost??
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Mine does 15 and all is well. I left the fuel alone and adjusted the wastegate. Pyrometer actually went down with the extra air. Black smoke is gone after about 1200 RPM's. Runs good, still thinking about a small increase in fuel though.
I have an ATS and the Isspro pyrometer in the drivers side exhaust manifold right before the crossover pipe connects to it.
A 24 valve Cummins tried to run from me, but I was right there. He even had two extra gears on me. I think about one flat on the fuel screw and I would be in front of that Dodge next time he wants to play.
Custom air intake and custom exhaust, stock motor with 6000 miles on it. These motors need air to run, lots of it. I am also starting to think a 4" downpipe and exhaust bact to where the stacks split off may be in order.
I have an ATS and the Isspro pyrometer in the drivers side exhaust manifold right before the crossover pipe connects to it.
A 24 valve Cummins tried to run from me, but I was right there. He even had two extra gears on me. I think about one flat on the fuel screw and I would be in front of that Dodge next time he wants to play.
Custom air intake and custom exhaust, stock motor with 6000 miles on it. These motors need air to run, lots of it. I am also starting to think a 4" downpipe and exhaust bact to where the stacks split off may be in order.
Senior User
Joined: Mar 2003
Posts: 235
Likes: 1
Dave - Do you open or close the wastegate? I think I asked that before, but can't remember.
Also, someone once sent me the info for 'rebuilding' the factory wastegate adjustment as it comes set at a certian spot. I am still thinking of teh air intake you have got going, I might do that.
How long did it take you to fab all that up again??
Also, someone once sent me the info for 'rebuilding' the factory wastegate adjustment as it comes set at a certian spot. I am still thinking of teh air intake you have got going, I might do that.
How long did it take you to fab all that up again??
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
I spent about 3 hours on the front scoop piece alone. It was a Saturday shot till I did all the duct work fab and install, but I did spend several hours trying to find HVAC duct parts that would work. The only parts I did find that I used was a 6 x 4 round reducer, 4" single wall adjustable ell and a 2' piece of 6" round duct. Everything else I fabricated myself.
Make the wastegate rod shorter to increase the pressure. Also you have to run up the road several times at 3300 RPM and your foot on the floor to make sure you do not go over 15 pounds of boost at higher RPM's.
That little E clip on the wastegate is hard to reinstall on a hot turbo without dropping it. That little rod is also hard to reinstall after you adjust it, the spring tension is kinda tight. Advance Auto has an E clip assortment that has several the right size if you drop yours like I did mine. It went to small dropped Ford parts heaven I guess, I never saw it again.
Make the wastegate rod shorter to increase the pressure. Also you have to run up the road several times at 3300 RPM and your foot on the floor to make sure you do not go over 15 pounds of boost at higher RPM's.
That little E clip on the wastegate is hard to reinstall on a hot turbo without dropping it. That little rod is also hard to reinstall after you adjust it, the spring tension is kinda tight. Advance Auto has an E clip assortment that has several the right size if you drop yours like I did mine. It went to small dropped Ford parts heaven I guess, I never saw it again.
Postmaster
Joined: Jul 2003
Posts: 2,976
Likes: 0
From: Rep. of Texas
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
I just run up a mountain with my foot on the floor at 3300 RPM's, my truck is loaded with enough tools and fuel tanks that it is like what most trucks towing already. Towing our 3,500 pound trailer and a 10,000 pound mini excavator does not make any difference in boost pressure, it does make it heat up the pyrometer a little faster though.
I love WV, I have a truck test track all around my house. I can find +25% grade paved roads, mud bogs, gravel roads with pot holes, off road hills steeper than anyone can climb and an interstate highway all within two miles of my house. I even have a couple of these things in my yard.
The only thing I do not have is a flat straight road more than 50 feet long anywhere close to here.
I love WV, I have a truck test track all around my house. I can find +25% grade paved roads, mud bogs, gravel roads with pot holes, off road hills steeper than anyone can climb and an interstate highway all within two miles of my house. I even have a couple of these things in my yard.
The only thing I do not have is a flat straight road more than 50 feet long anywhere close to here.
Last edited by Dave Sponaugle; Nov 25, 2004 at 10:19 PM.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Putting more fuel to the motor will increase the boost.
So I would do the IP first.
I left my IP alone because I was trying to get the fuel mileage up considering fuel prices. I modified my air intake extensively and turned the wastegate up to 15# and am faily happy with it. Mileage went up about 2 MPG, but since the motor is new the rings are just seating in at 6,000 miles. So I do not know if the mileage increase was the rings seating or the wastegate modification, both played parts I assume. I do not blow any black smoke at all now out on the highway. 12 MPG is great mileage for me.
So I would do the IP first.
I left my IP alone because I was trying to get the fuel mileage up considering fuel prices. I modified my air intake extensively and turned the wastegate up to 15# and am faily happy with it. Mileage went up about 2 MPG, but since the motor is new the rings are just seating in at 6,000 miles. So I do not know if the mileage increase was the rings seating or the wastegate modification, both played parts I assume. I do not blow any black smoke at all now out on the highway. 12 MPG is great mileage for me.
Postmaster
Joined: Jul 2003
Posts: 2,976
Likes: 0
From: Rep. of Texas
I get 16 on 35s and 3.55s going 65. No smoke on the highway either.
With a 3" downpipe and the IP turned up one flat, what should the boost be at 1500, 200, and 2500 rpm? I know thats kind of a question with a lot of possible answers, but what do you estimate?
With a 3" downpipe and the IP turned up one flat, what should the boost be at 1500, 200, and 2500 rpm? I know thats kind of a question with a lot of possible answers, but what do you estimate?
Senior User
Joined: Mar 2003
Posts: 235
Likes: 1
The enigine I put into my CC was a tired 7.3L that had 440,000 kilometers on it. That was about 40,000 klicks ago. So I am pushing 480,000 kilometers on this engine.
Since that is my situation, I am looking to leave the IP alone, at least until the last thing I can do. The air intake mods are the safest next logical choice for myself.
I am at the point where I want to mod the air intake, but know that once I do, it'll be a modified truck forever, almost no going back. Once I get over that hurdle, and just make the mods I'll be ok.
Damn, even with all the spares I have, I still am hesitating over making a simple mod. Foolish, eh?
Since that is my situation, I am looking to leave the IP alone, at least until the last thing I can do. The air intake mods are the safest next logical choice for myself.
I am at the point where I want to mod the air intake, but know that once I do, it'll be a modified truck forever, almost no going back. Once I get over that hurdle, and just make the mods I'll be ok.
Damn, even with all the spares I have, I still am hesitating over making a simple mod. Foolish, eh?
