Bigdogtrucker Posted December 6, 2020 Share Posted December 6, 2020 My "68 673 T runs great, has a reman Schwitzer on it. Turbo whistle is not very loud at all compared to others with this style Turbo. Thoughts? Quote Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/ Share on other sites More sharing options...
alex g Posted December 6, 2020 Share Posted December 6, 2020 Is it building boost pressure? Quote Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-464966 Share on other sites More sharing options...
Bigdogtrucker Posted December 7, 2020 Author Share Posted December 7, 2020 6 hours ago, alex g said: Is it building boost pressure? It doesn't have a gauge but I would guess it is. I mean you can hear it it's just not overly loud, rev's real quick it's a snappy engine. Quote Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-464999 Share on other sites More sharing options...
Freightrain Posted December 8, 2020 Share Posted December 8, 2020 They dont make big boost, so likely wont make a lot of noise like later model engines. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-465076 Share on other sites More sharing options...
fjh Posted December 8, 2020 Share Posted December 8, 2020 If It ain't broke don't worry about it If your happy with its performance leave well enough alone! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-465097 Share on other sites More sharing options...
doubleclutchinweasel Posted December 9, 2020 Share Posted December 9, 2020 Put a harder pull on it and see if it gets any louder! Might not be workin' it hard enough to get enough heat in the exhaust. My 611 didn't make much sound either...bobtailing. The 611 I used to work would get much louder when it was actually pulling. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-465139 Share on other sites More sharing options...
terry Posted December 10, 2020 Share Posted December 10, 2020 I once had a B model with a 711 and the local mack dealer put a turbo on it, it really had a whistle, had alot of people tell me they could tell it was me before they saw me! and it pulled real good in a dump truck. terry Quote Link to comment https://www.bigmacktrucks.com/topic/65174-turbo-whistle/#findComment-465196 Share on other sites More sharing options...
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