volvo500bhp Posted November 23, 2009 Report Share Posted November 23, 2009 Interested in the lunched HG's though - who was that? Hi Jardon Nice to see you on a decent Performance Volvo site the headgasket issues its best i dont say..... Hey Russ 27 degs BTDC at 6200 (the last rpm plot). Mind you my car never had an issue with it and made great power, but MTE relies on some timing pull halfway to end up with an acceptable value at high rpm's. A better way to tune is avoid timing pull anywhere and use the correct values. MTE's way takes less time to tune no doubt, but it relies on timing being pulled and ending up considerably lower than what's programmed. Hi JC I can see why you went the Turbo tuner route what ignition are you running now that you and Elliot are tuning your own cars to great effect now your not waiting for the knock sensors to pull the timing.......... Link to comment Share on other sites More sharing options...
Ipd Posted November 23, 2009 Report Share Posted November 23, 2009 Just FYI, Called Cometic today and asked about collaborating on a 5 cylinder cometic head gasket. Long story short, I was told it would cost $3200 in engineering fees after a DWX file was provided. If I were to cover the fee they would not provide any exclusivity on the part whatsoever... so I wouldn't hold your breath for us to step up. Link to comment Share on other sites More sharing options...
Captain Bondo Posted November 23, 2009 Report Share Posted November 23, 2009 Just FYI, Called Cometic today and asked about collaborating on a 5 cylinder cometic head gasket. Long story short, I was told it would cost $3200 in engineering fees after a DWX file was provided. If I were to cover the fee they would not provide any exclusivity on the part whatsoever... so I wouldn't hold your breath for us to step up. The stock headgasket is the only thing stopping a lot of guys on here from killing their motors completely. A copper sprayed elring should be good for as much power as pretty much anyone can throw at it. Waaaay more than 294hp that's for sure. Link to comment Share on other sites More sharing options...
HeavyIron Posted November 24, 2009 Author Report Share Posted November 24, 2009 Here is the picture of the carnage you all ave been waiting for. Cylinder 2 took the brunt, but cylinder 1 also had some. Link to comment Share on other sites More sharing options...
Ipd Posted November 24, 2009 Report Share Posted November 24, 2009 Kablamo!!! Link to comment Share on other sites More sharing options...
HeavyIron Posted November 24, 2009 Author Report Share Posted November 24, 2009 Kablamo!!! Makes it that much more amazing that the pistons/ rods/ valves are all ok... Link to comment Share on other sites More sharing options...
7 VII 7 Posted November 24, 2009 Report Share Posted November 24, 2009 soo... detonation Link to comment Share on other sites More sharing options...
volvo500bhp Posted November 24, 2009 Report Share Posted November 24, 2009 Just FYI, Called Cometic today and asked about collaborating on a 5 cylinder cometic head gasket. Long story short, I was told it would cost $3200 in engineering fees after a DWX file was provided. If I were to cover the fee they would not provide any exclusivity on the part whatsoever... so I wouldn't hold your breath for us to step up. There is no point there is nothing wrong with the standard gasket as long as you have a good tune Russ Here is the picture of the carnage you all ave been waiting for. Cylinder 2 took the brunt, but cylinder 1 also had some. OH Dear i would suggest you invest in a Turbo Tuner and a good mapper............ Russ Link to comment Share on other sites More sharing options...
Jardon Posted November 24, 2009 Report Share Posted November 24, 2009 Russ, No tuner in the world would have made a difference with that 22psi spring. My car feels brutal with a 19t and modest boost at low/mid rpm. With the ecu unable to alter boost until 1.35 bar with a turbo that spools just off idle is never going to end in smiles. I don't think trying to saddle MTE with the blame will help the OP - if he tunes the car with a Turbotuner (they sound great by the way) and that actuator spring then engine longevity will be compromised. He can get a very strong performance out of his hardware with a far safer level of wastegate control. Play to the strengths of your kit - that turbo is all about the 2500 to 5500 rpm grunt not caning it's nuts off. Mine will pull from 1500 rpm and I change at 6000 rpm to keep in the torquey midrange. Whatever the tune - it's a 19t not a big garrett. Link to comment Share on other sites More sharing options...
GeraldJ Posted November 24, 2009 Report Share Posted November 24, 2009 Ive seen blown gaskets and I will say that ranks up at the top. I am amazed that there is no damage to anything else. I said it once and ill say it again, get a lighter spring :rolleyes: Link to comment Share on other sites More sharing options...
Captain Bondo Posted November 24, 2009 Report Share Posted November 24, 2009 Russ, No tuner in the world would have made a difference with that 22psi spring. A good tuner may not have been able to cure the underlying issue, but they would have been monitoring the engine more closely and would have aborted the run before it started liquifying the fire rings on the headgasket. My car feels brutal with a 19t and modest boost at low/mid rpm. With the ecu unable to alter boost until 1.35 bar with a turbo that spools just off idle is never going to end in smiles. I don't think trying to saddle MTE with the blame will help the OP - if he tunes the car with a Turbotuner (they sound great by the way) and that actuator spring then engine longevity will be compromised. He can get a very strong performance out of his hardware with a far safer level of wastegate control. Play to the strengths of your kit - that turbo is all about the 2500 to 5500 rpm grunt not caning it's nuts off. Mine will pull from 1500 rpm and I change at 6000 rpm to keep in the torquey midrange. Whatever the tune - it's a 19t not a big garrett. I agree and that's probbaly part of why the plot looks so bizarre. Link to comment Share on other sites More sharing options...
Jardon Posted November 25, 2009 Report Share Posted November 25, 2009 A good tuner may not have been able to cure the underlying issue, but they would have been monitoring the engine more closely and would have aborted the run before it started liquifying the fire rings on the headgasket. I think whats happened here is that the OP is running an MTE tune designed for a standard actuator but then added the stronger spring - there was no monitoring, just "experimentation" on the part of the owner. Link to comment Share on other sites More sharing options...
HeavyIron Posted November 26, 2009 Author Report Share Posted November 26, 2009 I think whats happened here is that the OP is running an MTE tune designed for a standard actuator but then added the stronger spring - there was no monitoring, just "experimentation" on the part of the owner. Here is what I don't understand. I don't have problems with too much boost or detonation at part throttle or even full throttle until about 5500 rpm. I thought I had it cure b/c I did two rolling runs and progressively got into the boost until I hit 120. The third run is what got me but not until almost redline. How would a lighter spring have helped if everyone is saying that the 19T is out of breath at that point? Why would I want my wastegate to open and release boost? Link to comment Share on other sites More sharing options...
Captain Bondo Posted November 26, 2009 Report Share Posted November 26, 2009 Here is what I don't understand. I don't have problems with too much boost or detonation at part throttle or even full throttle until about 5500 rpm. I thought I had it cure b/c I did two rolling runs and progressively got into the boost until I hit 120. The third run is what got me but not until almost redline. How would a lighter spring have helped if everyone is saying that the 19T is out of breath at that point? Why would I want my wastegate to open and release boost? Your wastegate would not be "releasing boost". Your wastegate would be releasing the 40+psi of 1500+ degree exhaust gases your motor is gagging on. You need to understand the kind of strain that is putting on things... Link to comment Share on other sites More sharing options...
HeavyIron Posted November 26, 2009 Author Report Share Posted November 26, 2009 Your wastegate would not be "releasing boost". Your wastegate would be releasing the 40+psi of 1500+ degree exhaust gases your motor is gagging on. You need to understand the kind of strain that is putting on things... In theory, shouldn't everything beyond 22psi be released since I have a 22lb spring? Link to comment Share on other sites More sharing options...
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