Huge problem on the dyno yesterday(need some good evo tech support)
Does your catch can setup have a breather air filter? I am thinking you probably have a closed-loop catch can setup. The crankcase pressure is building up and no where to go. You are getting blow-by around 6,000 RPM when you shift, right? Not sure how this effects HP.
I would deffinitly do a leak down test. the dipstick blowing out under boost is from blow-by. the rings are not seated correctly against the cylinder walls. Also check cam timing, i personally dont like using aftermarket cam gears. i have seen cars down on power because of aftermarket cam gears out of oem spec. Also do you have a cat on your car. If you do it could be damged and clogging your exhaust. And if you check everything and nothing is wrong get a new tuner before you need a new motor.
Are you saying that blow-by is caused by the o-rings not being seated correctly against the cylinder walls? Or, you are listing possible causes for low HP numbers? If the o-rings are not seated correctly, wouldn't it show up as lower compression test pressure?
Thanks,
Jay
I disagree. The dip-stick blowing out doesn't necessarily mean that the rings aren't sealing. Its from the higher pressures of a having a built motor... if you don't have a catch can that is vented its probably because of that. You can either get a vent or buy a spring to hold it down.
Like I said, if your shop can't diagnose the problem or isn't familiar with EVO's find a new shop. Better to wait and have it done right then have your investment going down the drain.
Like I said, if your shop can't diagnose the problem or isn't familiar with EVO's find a new shop. Better to wait and have it done right then have your investment going down the drain.
Last edited by project_skyline; Apr 16, 2010 at 06:55 PM.
First thing I would do is a boost leak test. Who wired up the Haltech? Reason I asked? How are the triggers set up? How does the timing table look?
Start from the basic.
Verify timing, boost leak test to 30 psi and do it through the intake,
smoke test from the exhaust,
Do you have a graph you can post?
Can you email me your tune file?
Start from the basic.
Verify timing, boost leak test to 30 psi and do it through the intake,
smoke test from the exhaust,
Do you have a graph you can post?
Can you email me your tune file?
First thing I would do is a boost leak test. Who wired up the Haltech? Reason I asked? How are the triggers set up? How does the timing table look?
Start from the basic.
Verify timing, boost leak test to 30 psi and do it through the intake,
smoke test from the exhaust,
Do you have a graph you can post?
Can you email me your tune file?
Start from the basic.
Verify timing, boost leak test to 30 psi and do it through the intake,
smoke test from the exhaust,
Do you have a graph you can post?
Can you email me your tune file?
Look up my vids on YouTube. I have one from an Sti with a bad leak on the uppipe.
I don't have the link but it's under rsmotorsinc username
have you verified the timing?
Low 300 with fp black, I would think it's something obvious. I would even just put the stock ecu back in. I like Haltech's new units but I honestly don't think you need it for your set up.
I don't have the link but it's under rsmotorsinc username
have you verified the timing?
Low 300 with fp black, I would think it's something obvious. I would even just put the stock ecu back in. I like Haltech's new units but I honestly don't think you need it for your set up.
I just finished doing the leak down test and results are as follows:
Cyl -1(26)
Cyl -2(63)
Cyl -3(62)
Cyl -4(67)
The air was not coming out of the exhaust or intake nor were there any bubbles in the radiator but all the air seeping through cyl 2-4 was from where the spark plug goes in. I am thinking head gasket maybe???
Cyl -1(26)
Cyl -2(63)
Cyl -3(62)
Cyl -4(67)
The air was not coming out of the exhaust or intake nor were there any bubbles in the radiator but all the air seeping through cyl 2-4 was from where the spark plug goes in. I am thinking head gasket maybe???
No cat the dp has a flex section I pulled it off the car and shined a light through it no problems at all also ran a tennis ball through it with no problems as well as the rest of the exhaust. A local machine shop did the work on the head and block they have a pretty good reputation around here and I know the guy personally he as a 4g63 as well and was very knowledgeable during the build