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- #1,101
Good news is new turbo is on it's way, bad news is it's bigger and I have no idea if it will fit
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- Thread starter J Mack
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Sounds like a good "problem". Have fun shoehorning it in!
- Thread starter
- #1,103
I actually preferred the small turbo but BorgWarner felt I was over speeding it when it came apart, even though I don’t necessarily agree at 2K a pop I’m not willing to test my theory and buy the same turbo again. The EFR6258 would start making boost right off idle and almost instantly push up to 30# then slowly go to about 34# between every shift making the pig fun to drive, the problem is I was running lean to brake in the engine and as soon as I started to get my A/F ratio close to where I want to be they say I’m too far to the right of the map making the EFR7064 a better choice. Looking at the map I will have more power potential with the 7064 but I lose some low end toque, wanting a fun daily driver I’m hoping I can tune around it some without making it too smoky.
Time will tell but first I need to figure out a way to make it fit and keep an alternator.
bobm
WTF, WTF, WTF!!!!
For some unknown reason I don't think this is going to be a Problem for you
For some unknown reason I don't think this is going to be a Problem for you
Funny, I was thinking the same.
bobm
WTF, WTF, WTF!!!!
Great minds
- Thread starter
- #1,107
For some unknown reason I don't think this is going to be a Problem for you
You two give me too much credit or underestimate just how lucky I get at times when fumbling though these matters.
At any rate trying as best I can to stay within my 5K total build budget the decision was made to try the larger turbo and duct tape it in.
Uhhhhh....... I'm no engineer, but may I recommend bailing wire instead? You know, cause of the heat issue and all.....You two give me too much credit or underestimate just how lucky I get at times when fumbling though these matters.
At any rate trying as best I can to stay within my 5K total build budget the decision was made to try the larger turbo and duct tape it in.
This post is amazing! Unwarranted modesty, complete disregard for budget, AND duct tape! I love the iron pig preservation society!You two give me too much credit or underestimate just how lucky I get at times when fumbling though these matters.
At any rate trying as best I can to stay within my 5K total build budget the decision was made to try the larger turbo and duct tape it in.
bobm
WTF, WTF, WTF!!!!
Never mind the McGyver S--T. Get back to work.
. Sorry Boss came out in me.
. Sorry Boss came out in me.
- Thread starter
- #1,111
New turbo is here and as expected it doesn’t fit. After all it’s going on a pig and it would be foolish to expect something to be easy.
The EFR turbos have an integrated blow off valve and this one is in the way of everything so I’ll need to machine it off and weld up the holes then machine the compressor housing inlet flange back some in the hope that I can get something to connect from the air cleaner to the turbo.
The EFR turbos have an integrated blow off valve and this one is in the way of everything so I’ll need to machine it off and weld up the holes then machine the compressor housing inlet flange back some in the hope that I can get something to connect from the air cleaner to the turbo.
Man, that's a bust. Well, if anybody can figure it out, you can. A lot of work, no other type turbo will work?
- Thread starter
- #1,113
I could always go back the stock HX30 turbo but I would need to be smart enough to admit defeat to even consider that path. At this point the EFR turbos are the best at what they do (big turbo power with little turbo drivability) that I know of and I’m determined to shoehorn it in even if it means cutting the front of the pig off and starting over…
bobm
WTF, WTF, WTF!!!!
Make it Work. You can doooo it.
- Thread starter
- #1,115
I had to remove to blow off valve and weld up the housing..
Turbo is on and went for a short test drive, I’ll need to work on fueling and an air intake tomorrow.
Turbo is on and went for a short test drive, I’ll need to work on fueling and an air intake tomorrow.
J Mack,
I don't know much about the turbos, will you have to relocate the blow off valve?
I don't know much about the turbos, will you have to relocate the blow off valve?
- Thread starter
- #1,117
The blow off valve is to prevent compressor surge, compressor surge occurs when you suddenly lift off the gas pedal and the throttle plate closes. When boost heads into the engine and it hits the closed throttle plate it has nowhere to go but back into the turbo. The effect of this boost backtracking into the compressor outlet will damage the compressor wheel. I have a diesel and no throttle plate therefore compressor surge is not a concern and the blow off valve was interfering with my only path to run an air intake tube to my air cleaner so it had to go otherwise I would have left it on and just bypassed it.
Looks bitchin'!
I don't know, just thinking out loud. If you lift off the throttle and you don't have a throttle plate then it is just reducing the amount of fuel going to the engine? And if the turbo is still pumping air into the cylinders (and a lot of it) it seems like it would result in a very lean condition. In a gas engine this is bad, is it different for a diesel?
- Thread starter
- #1,120
Yes..
Everything goes extremely lean on deceleration including petrol engines, no load lean is similar for both petrol and diesel but full load lean they are completely different than each other, stoichiometric for diesel fuel is 14.55:1, not much different to the 14.7 for petrol. With petrol engines if they lean out they hit the hot part of the range and melt pistons with diesels if we run too rich, we melt pistons.
I’ve only seen blow off valves use in diesel racing applications were they will use power adders to get past the 5000 rpm limit of diesel and running big boost numbers like 100 PSI but even then they seem rare in the diesel world.
