child9
NAXJA Forum User
- Location
- Austin, TX
It's been a bit since I've been active on the web...I'm buried in school working towards a BSME from UT so Fringe XVO and pretty much everything is taking a back seat to Differential Equations, Physics, and Statics right now, though there is no problem with any me doing any valve body work that anyone needs done. Threads are setup for that...you know the drill. The Jeep is being driven daily, and just a set of General Grabber HTS's are so much smoother than the old bustedy tires that were on it. The new tires also fixed the alignment. I purchased Dirtbound's 3-fan cooling setup and I couldn't be happier as well. Those upgrades add up to one thing: DYNO TIME. Anyway, the point of this thread is to help me document my progress while allowing other interested parties to follow along. That said, when I post it won't always be great news, successes, or "look how awesome I am on the internet". It will be a lot of descriptions, issues, and troubleshooting processes. Today is one of those days.
So! On the 14th I finally put the Jeepra on the dyno.
Good news:
She sounds GREAT and pulls smoove like butta. I pulled her 5 times without a hiccup. No overheating, no fluid leaks, no catastrophic issues. I feel very good about the solidarity and viability of this Jeep as it progresses further into being one of the sweetest vehicles on my planet.
Bad news:
Something is WRONG! I can't make her make boost and keep it. No matter what adjustments I made to the boost controller, the issue wasn't really affected. She spools up and hits 5-7 psi, but then almost immediately starts dropping back down and holds at about 2 psi.
There are several things off the top of my head that MAY cause this.
1.) Boost leak.
This could be caused by an misaligned clamp or anything else that would allow pressurized air to escape on its way from the turbo outlet to the intake plenum, including the BOV.
2.) Waste Gate Issue.
I put an EVO 8 turbo on a 2JZ. That turbo is normally mated with a 2.0L 4 cylinder engine. Without getting into too much detail (I don't wanna bore anyone) it is possible that the waste gate is being forced open by the exhaust gasses. The actuator is an unknown unit purchased from ebay (like the BOV).
So it could be something related to the two above or something else, but there was no way for me to troubleshoot since I just threw the Jeep on a dyno with no one around. All I could do was stand on the pedal, watch the gauges, and adjust the manual boost controller. More will come soon. I have a list of things scheduled for spring break in March.
Here is the original build thread in case you haven't already seen it, as well as the first test drive vid on you tube.
http://www.naxja.org/forum/showthread.php?t=1033211
http://www.youtube.com/watch?v=tm3-ku-rIiU
New video will be coming at some point.
-Chad
So! On the 14th I finally put the Jeepra on the dyno.
Good news:
She sounds GREAT and pulls smoove like butta. I pulled her 5 times without a hiccup. No overheating, no fluid leaks, no catastrophic issues. I feel very good about the solidarity and viability of this Jeep as it progresses further into being one of the sweetest vehicles on my planet.
Bad news:
Something is WRONG! I can't make her make boost and keep it. No matter what adjustments I made to the boost controller, the issue wasn't really affected. She spools up and hits 5-7 psi, but then almost immediately starts dropping back down and holds at about 2 psi.
There are several things off the top of my head that MAY cause this.
1.) Boost leak.
This could be caused by an misaligned clamp or anything else that would allow pressurized air to escape on its way from the turbo outlet to the intake plenum, including the BOV.
2.) Waste Gate Issue.
I put an EVO 8 turbo on a 2JZ. That turbo is normally mated with a 2.0L 4 cylinder engine. Without getting into too much detail (I don't wanna bore anyone) it is possible that the waste gate is being forced open by the exhaust gasses. The actuator is an unknown unit purchased from ebay (like the BOV).
So it could be something related to the two above or something else, but there was no way for me to troubleshoot since I just threw the Jeep on a dyno with no one around. All I could do was stand on the pedal, watch the gauges, and adjust the manual boost controller. More will come soon. I have a list of things scheduled for spring break in March.
Here is the original build thread in case you haven't already seen it, as well as the first test drive vid on you tube.
http://www.naxja.org/forum/showthread.php?t=1033211
http://www.youtube.com/watch?v=tm3-ku-rIiU
New video will be coming at some point.
-Chad
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