3.4L X51 Availability
07-29-2008, 12:41 PM
#31
Must be all them extra ponies rumbling in your engine bay.
Did you ask John or Hans about it? Maybe they have some insight. Also, I think it just needs to be broken in on the track. That will settle the mounts into their final resting position
-td
Did you ask John or Hans about it? Maybe they have some insight. Also, I think it just needs to be broken in on the track. That will settle the mounts into their final resting position
-td
07-29-2008, 06:05 PM
#32
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Weird...did you get the black pillows? Didn't tighten them down too much or anything right? Mine's absolutely peaceful at idle now...vibrations at 3000+ are acceptable to me. Def. more present than stock but really not annoying by any means.
Everyone's different though with tollerances to NVH.
Everyone's different though with tollerances to NVH.
Idle is the same as the blown stock mounts for me, and anything over 3k is not tolerable for my wife to still ride in the car (I'm not a big fan, either).
I'm worried that the old mounts crapped out from heat, however. I'm trying to figure out some method of insulating the stock mounts (especially the exposed rubber that holds the oil in underneath the can).
-Judd
08-08-2008, 02:47 PM
#33
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Ok, so the engine is now broken in. I can finally write a report up.
The WEVO mounts were no good for me (and my wife passenger), so I put new stock mounts back on. They are perfect. No vibrations except when the engine is very warm at idle, and even then, it's much less than the WEVO mounts.
I'm still having a problem with the engine. When it's warm, it doesn't want to restart. It cranks and fires, but without adding throttle the RPMs drop too low and the engine stalls.
I brought it back to the dealer to check it out, and they thought maybe it was related to the non-functioning rear decklid fan (not removing the hot air, and causing vapor lock). They replaced it, but the problem persisted.
Finally, they contacted Porsche about the problem, becasue everything else was fine on the car. Porsche replied that the DME map for that engine is tuned for European fuel, not the crap we have here in the US. In TX, we have a min 10% ethanol in our gas, which sucks.
Porsche apparently said that if the only problems I'm seeing are a rough idle and minor warm start issue, then I'm pretty lucky. That's not real comforting for the future.
A custom map ($3k) would fix all of this, but I'm not doing that for at least a couple more years. Now I guess I'll have to start researching the differences in the US and EU gasses, and see if there is some additive I can drop in the tank to correct any issues (please post info on this if you have it).
For the engine performance, I think it will rock at the track. Over 5k rpm, it's a freakin' banshee, and pulls like nothing else I've been in. Below that, it has less torque than the stock 3.4, so it actually feels slower in my daily drive situations.
The sound is awesome. The intake is throaty and clear, and the exhaust is more pronounced as well.
-Judd
The WEVO mounts were no good for me (and my wife passenger), so I put new stock mounts back on. They are perfect. No vibrations except when the engine is very warm at idle, and even then, it's much less than the WEVO mounts.
I'm still having a problem with the engine. When it's warm, it doesn't want to restart. It cranks and fires, but without adding throttle the RPMs drop too low and the engine stalls.
I brought it back to the dealer to check it out, and they thought maybe it was related to the non-functioning rear decklid fan (not removing the hot air, and causing vapor lock). They replaced it, but the problem persisted.
Finally, they contacted Porsche about the problem, becasue everything else was fine on the car. Porsche replied that the DME map for that engine is tuned for European fuel, not the crap we have here in the US. In TX, we have a min 10% ethanol in our gas, which sucks.
Porsche apparently said that if the only problems I'm seeing are a rough idle and minor warm start issue, then I'm pretty lucky. That's not real comforting for the future.
A custom map ($3k) would fix all of this, but I'm not doing that for at least a couple more years. Now I guess I'll have to start researching the differences in the US and EU gasses, and see if there is some additive I can drop in the tank to correct any issues (please post info on this if you have it).
For the engine performance, I think it will rock at the track. Over 5k rpm, it's a freakin' banshee, and pulls like nothing else I've been in. Below that, it has less torque than the stock 3.4, so it actually feels slower in my daily drive situations.
The sound is awesome. The intake is throaty and clear, and the exhaust is more pronounced as well.
-Judd
09-06-2008, 12:48 PM
#34
Pro
>> Over 5k rpm, it's a freakin' banshee, and pulls like nothing else I've been in. The sound is awesome. The intake is throaty and clear, and the exhaust is more pronounced as well.
Would you have any videos you can share?
I've been thining about similar changes to my old 3.4L when it finally gives up the ghost.... If that ever happens.
Would you have any videos you can share?
I've been thining about similar changes to my old 3.4L when it finally gives up the ghost.... If that ever happens.
