GT4 Engine noises
01-03-2021 | 02:55 AM
#61
Three Wheelin'
Joined: Mar 2017
Posts: 1,368
Likes: 1,210
From: Dallas
To TRZ06, I think you will be happy with the GT4. It may just take a few modifications for it to be "just right" for you however. A little extra power, responsiveness, and balanced sound when the exhaust is upgraded will be welcome upgrades.
Also remember the solidity and feel of driving the Cayman body shell is at the highest of levels. It is one of the stiffest metal chassis car out their with the structural rigidity of the 981 Cayman being something on the order of 42,000 Nm/degree. The GT4 has even more reinforcement in the rear as well to further improve on that. That is almost in the league with other carbon fiber tub sports cars. This creates a super stable platform from which to build a suspension from. I noticed every time I jumped into my Cayman S and it is even more pronounced in the new GT4.
Also remember the solidity and feel of driving the Cayman body shell is at the highest of levels. It is one of the stiffest metal chassis car out their with the structural rigidity of the 981 Cayman being something on the order of 42,000 Nm/degree. The GT4 has even more reinforcement in the rear as well to further improve on that. That is almost in the league with other carbon fiber tub sports cars. This creates a super stable platform from which to build a suspension from. I noticed every time I jumped into my Cayman S and it is even more pronounced in the new GT4.
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josephr25 (01-06-2021)
01-03-2021 | 02:04 PM
#62
Rennlist Member
Joined: Oct 2018
Posts: 1,773
Likes: 1,635
From: PA
It was warm enough to go for a drive today. So I went out and tried to listen for this noise. I don't think the accessory belt (belts?) makes any noise on my car. My car has 1000 miles on it as of today. I do hear a mechanical whining noise, which I think you may be referring to. The mechanical whine increases in intensity with engine RPM that and I always just associated that noise with the very high compression of the engine. As the RPM increases, it sounds similar to the high pitched whine of other cars with high compression that I have driven or ridden in. I think if it were the belts making that noise I would still hear at least some of the whine at engine idle, and I don't hear it at all at idle.
Does anyone know if the GT4 has a secondary high-pressure fuel pump system like many BMWs have? (If we have one?) That could possibly also be contributing to the engine song/cacophony.
Does anyone know if the GT4 has a secondary high-pressure fuel pump system like many BMWs have? (If we have one?) That could possibly also be contributing to the engine song/cacophony.
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phefner (01-03-2021)
01-06-2021 | 01:40 AM
#63
Instructor
Joined: Aug 2003
Posts: 138
Likes: 23
From: Oregon
Maybe you guys would be happier with an “M” car from BMW?
Seriously. They are quiet, come with synthesized motorsports sound through the stereo, and turbo charged. I even hear you can tap into their ECU and tone down the synthesized motorsport sounds should you find even that low level unacceptable.
There should be nothing but smiles when you drive. You should WANT, find yourself coming up with excuses, lying through your teeth, to get out on the road.
Anything else is just a waste.
Seriously. They are quiet, come with synthesized motorsports sound through the stereo, and turbo charged. I even hear you can tap into their ECU and tone down the synthesized motorsport sounds should you find even that low level unacceptable.
There should be nothing but smiles when you drive. You should WANT, find yourself coming up with excuses, lying through your teeth, to get out on the road.
Anything else is just a waste.