4.1 turbo question July 31, 2022 01:00PM
The other day at the Western Series pull in Council Bluffs, Iowa, a few of the 4.1 tractors had a different sound as they were spooling up at the starting line. It sounded like a whistle from the turbo. I've never noticed it before. I'm curious if this is a new turbo or where the noise is coming from. The tractors that I heard it with did quite well.

Re: 4.1 turbo question July 31, 2022 03:43PM
The biggest problem is tires not turbo. Call ANY tire cutter and they will tell u India pro pullers are 212-215. Why measure drawbars and check writ. They are illegal. Badger state actually last year measured and wow too tall. PPL step up!!!!! Doesn’t matter who had them on measure them!

Re: 4.1 turbo question July 31, 2022 04:00PM
Not all of them are too big!!! Do little investigating before getting on here and running off at the mouth

Re: 4.1 turbo question July 31, 2022 04:21PM
Then MEASURE the circumstances and Solve it!!!!!!! They measure width 2 years ago. Measure circumference and solve it!!!

Re: 4.1 turbo question August 01, 2022 03:00AM
I have seen several sets measured that measured under the 210 limit!!! So again know your facts or protest them, but do something besides bitch.

Re: 4.1 turbo question July 31, 2022 04:06PM
The whistle you are hearing is the air going over the slot in the turbo.

Re: 4.1 turbo question August 01, 2022 01:07AM
Thank you. These two turbos sounded distinctly different than what I'm used to hearing. I was wondering if there was a new turbo out that made that sound but it was probably just nothing.

Re: 4.1 turbo question August 01, 2022 04:03AM
I’m gonna assume IH 1456 is being sarcastic, as the 4.1 class is a smooth cover class, now MWE groove or “slot” allowed.

Re: 4.1 turbo question August 01, 2022 01:40PM
Probably the new 4 blade turbo. Not to many of them out there from the sound of it.

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