Discussion in 'Need for Speed!' started by Dono, May 22, 2015.
Glad you got it done, and may warmer weather come sooner than later!
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Dono's truck sounds like my wife and kids....
Glad you got something done you wanted to. Enjoy the holidays for a while, drink some more.
Ok, I'm at a bit of a cross roads here.
egr or no egr?
1. I have a feeling my egr is leaking. That's the only reason Don Lasota can think of that I can't add timing without detonation.
Also, I'm seeing some random misfires, and its not plugs or wires.
My options are to just replace the egr valve and control solenoid, and see if that takes care of it, or block it off and turn it off in the tune.
Blocking egr off opens me to the possibility of moving to a bigger inside diameter elbow rather than the factory restrictive elbow.
Probably the best thing to do would be to make a block off plate and find a cap for the egr bung on the header and test. Then I could make the decision of what to do after testing? I really wonder what a less restrictive elbow would do for me once I get my inlet piping size upgraded.
But then, egr is supposed to really help emissions and allow advanced timing at cruise, but......exhaust gasses do tend to gum up intake valves. ugh.
I made a block off for the egr. If you want it, let me know. Also if you want a larger elbow, I can make one for you as well. Even if you decide to use the egr, I can make one up for you.
You always have all the stuff, lol.
Its Just so hard to get that egr tube to line up nicely when making a new elbow.
Maybe I will just order up a new egr valve. I can always reduce egr function rather than remove it.
Then once I get the rest of the intake piping upgraded (2.5" from 2" from the turbo) , I might take you up on the elbow.
I'd block the EGR ASAP for your testing, to see if that helps a lot. If the EGR can "seep" in boost applications, that would be an answer to whether to keep EGR.
I didn't know you were still going through the stock elbow and TB. Boost minimizes the negatives of smaller ports etc, but there is still HP to gain with bigger TB and inlet paths etc.
I'm going to make a larger elbow for my 306 project, and I'm wondering if 3.25" AL pipe is available, or if 3.5" is easier and still doable. I think a 75mm TB will be enough for a NA 306, but for your boosted 347, I'd aim for a 90mm at least, in that round TB setup.
I'm 3 inch after the throttle body, but neck down to 2" as I go thru the wheel well, and stay 2" to the turbo. Once I get rid of the 2" with the crush bends, I'll be interested to see if I end up with more lag, or even notice and difference at all with iat's, etc. I'm expecting there to be a performance increase (Or I wouldn't be wasting my time).
I found the size of the cap needed for the exhaust manifold
5/8 pipe cap....Brass with a rounded head. Used to cap off natural gas lines.
Tim, I'll take you up on the block off plate. No rush at all.
K. I'll have to find it. Should be on top of the tool box. All it is is a chunk of think sheet metal with the bolt holes drilled into it. Pretty simple.
Yea, I can look around home. I thought I had one already done also, but havn't seen it for years. I'll have another look
I might have a chunk of metal I can form also.