04 gto m6 motor with tr230 cam LOST POWER ?? BAD CAM ?
11-24-2009, 10:30 AM
#85
It's good to hear everything worked out. I would be suspicious as to why the dead cylinder wasn't detected, whether it was the tuner's error, or something wrong in the ECU. I would think that the crank position sensor would be able to pick that up, it certainly went nuts when one of my plug wires internally broke and didn't fire.
11-24-2009, 01:29 PM
#86
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I have no idea why the tuner didn't know. all he could say is that somethings wrong with my motor like a dead cylinder or something.
I had it tuned local and the guy seemed like a tool and car didnt run right. I figured it was just in the tuning you know. I drove it a while .. then my appointment date came up for synergy in Fremont. Then after he tuned it and no power was made I knew something was wrong.
I had it tuned local and the guy seemed like a tool and car didnt run right. I figured it was just in the tuning you know. I drove it a while .. then my appointment date came up for synergy in Fremont. Then after he tuned it and no power was made I knew something was wrong.
11-24-2009, 02:02 PM
#87
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I have no idea why the tuner didn't know. all he could say is that somethings wrong with my motor like a dead cylinder or something.
I had it tuned local and the guy seemed like a tool and car didnt run right. I figured it was just in the tuning you know. I drove it a while .. then my appointment date came up for synergy in Fremont. Then after he tuned it and no power was made I knew something was wrong.
I had it tuned local and the guy seemed like a tool and car didnt run right. I figured it was just in the tuning you know. I drove it a while .. then my appointment date came up for synergy in Fremont. Then after he tuned it and no power was made I knew something was wrong.
FIRE YOUR TUNERS.
11-24-2009, 02:04 PM
#88
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yea, if 2 different tuners didnt pick this up there is def an issue. when i had my car tuned by slowhawk, i had a bad coil pack/wire, and with in the first 2 minutes of being on the dyno and 1 pull he told me exactly what was wrong and what cyl. sounds to me like someone didnt know what they were doing and i def wouldnt allow them to touch my car again.
11-24-2009, 02:26 PM
#89
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yeh.. frustrates me in a way. rick at synergy seems nice. he came out checked out the engine. He said there are things he looks for before tuning. the nipple near the map sensor sometimes people forget to cap off. checks grounds, harness .. anyways we fixed a ground wire and after he dyno he basically said if and when i fix it come back to retune it. I can tell you that it did run a lot smoother after he tuned it .. even though it was still 7 cylinders.
11-26-2009, 03:21 AM
#92
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rick@synergy is a very top notch tuner. its not his job to track down the faults in a setup, he's a tuner not a mechanic. he could spend hours trying to track down a problem. either way, glad everything turned out great! have fun with it!
11-26-2009, 09:59 AM
#93
What it means is that all of your valve events are advanced 3 degrees compared to the cam being installed straight up. Retarding your cam 3 degrees will keep the exhaust valve closed for 3 extra degrees of crank rotation. This should increase the torque output because it keeps the pressure in the cylinder that much longer. PredatorZ is much better at analyzing valve events so hopefully he will chime in on this.
11-26-2009, 10:24 AM
#94
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- When you see cams specs like 224/224 .563/.563 112+4; the +4 denotes that the cam has 4 degrees of advance ground in.
- Most off the shelf cams have 2 or 4 degrees of advance ground in. This lowers the power band slightly and offers more low end and midrange at the sacrifice of a bit more top end power
- For cams used primarily on the street the advance is best appreciated. For a strip or racing setup 2 or 0 degrees advance will net you more peak power in the upper ranges of the power band
This link should help you out.
https://ls1tech.com/forums/generatio...cam-guide.html
11-26-2009, 10:33 AM
#95
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What it means is that all of your valve events are advanced 3 degrees compared to the cam being installed straight up. Retarding your cam 3 degrees will keep the exhaust valve closed for 3 extra degrees of crank rotation. This should increase the torque output because it keeps the pressure in the cylinder that much longer. PredatorZ is much better at analyzing valve events so hopefully he will chime in on this.
11-27-2009, 11:49 AM
#97
NO excuse can justify that.
11-27-2009, 09:25 PM
#98
That may be true. But if you're paying someone several hundred to "tune" your engine for you, picking up on something as obvious as a dead cylinder should be included. Diagnosis and repair would be extra, but to "tune" around a dead cylinder? NO excuse can justify that.
NO excuse can justify that.
