on my stock '73 - I notice a big change in intake sound when I run without the air temperature regulator
also, with the top on, wind noise is the most fatiguing factor for me
73 911S Targa
It was a few years back, but I’m pretty sure I put this liquiMoly in.
Recommended from a 40 yr Porsche mechanic.
It might be great for your engine, I don’t know, but I didn’t like it.
I was hoping it would make it quiet, but it did not.
The stuff I really like is Lucas,
(surely some hate it, but I have used it for 40+ years)
I couldn’t handle the noise and so I tried this Lucas.
I live in a hot climate, so I don’t worry so much about cold starts.
It made a very significant change to the motor noise, and also the tranny noise, it knocked out the high noises.
Personally I use 3+ quarts.
Also, my engine never runs hot.
I also run Valvoline VR1 20/50 .
My gear oil is shell spirex.
Take out the fan belt and see what you hear.
Last edited by Scott A; 10-05-2023 at 06:17 AM.
Current long term ownership: 63 Cab, 71 911, 74 914
Are you running solex or weber carburetors?
Would love to see some pictures of the car. The interior looks very nice in the short video.
Almost sounds like an alternator whine to me. How about revving the engine, while in place with the engine cover is open. No driving.
Haasman
Registry #2489
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65 911 #302580
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I agree that’s what my opinion is with plenty of expereince driving these cars but not so much turning wrenches on them. It’s back in the hands of the guy that is more than competent at chasing it down. I decided that was the best course of action once I confirmed I wasn’t over-reacting to what my ears were telling me.
I’m back. The car runs amazing; truly amazing for a 1965 911. Everything “checks out” mechanically, it’s not alternator, belts, nada. It even has dynomat already in the back. However, this high pitched wail resonance sound is still there and it’s not as I have experienced hearing early 2.0 swb cars in my past. I’ve had a couple of people suggest it could be a result of swapping oem for ssi stainless header/heat-exchanger. On one hand I want to try it given I’ve heard that suggestion 2x now. On the other hand, don’t a LOT of people replace oem header/heat-exchanger with ssi stainless setup? And if so, I can’t imagine anyone not complaining about what I’m hearing. The oem soundtrack is there, it’s just accented/over-shadowed by a foreign wail that doesn’t belong.
My Targa had a similar high pitched wail which I always attributed to the MFI. Until I got my current 2.2S which is way quieter and doesn’t have the wail. Very similar to your video. In my Targa, this sound was the same before and after its engine rebuild. My best guess is maybe the camshaft gears in combination with the chain, or the intermediate shaft gears. Both are very expensive to try and renew unfortunately.
I don’t think it’s the exhaust or heat exchangers. I had SSIs on my Targa and have them now on my 2.2 so that’s definitely not it.
1970 2.2S Elfenbeinweiss
1972 2.4T Targa Aubergine (MFI) [For sale]
2002 996 TT Midnight Blue
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