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454 blower update.

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Old 06-10-2015 | 02:21 PM
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Tired blower... this pisses me off.

Checked the clearances: .012 toward the rear of the case, .014 toward the front.

Well, I'm not sacrificing my summer to wait on my blower to be rebuilt, but at least I now know why this thing isn't building the boost that was expected.
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Old 06-10-2015 | 02:23 PM
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No surprise after those boost numbers on your setup. That sucks tom .
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Old 06-10-2015 | 02:28 PM
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Originally Posted by TomZ
Tired blower... this pisses me off.

Checked the clearances: .012 toward the rear of the case, .014 toward the front.

Well, I'm not sacrificing my summer to wait on my blower to be rebuilt, but at least I now know why this thing isn't building the boost that was expected.
I think i asked this question earlier, not sure if i got the answer or not. So what is the recommended clearance on the rotor to case?
I would like to check my 250 tonight.
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Old 06-10-2015 | 02:30 PM
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Normal is about .004-.006 on a used 250 with some time on it.
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Old 06-10-2015 | 02:32 PM
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Originally Posted by MILD THUNDER
Normal is about .004-.006 on a used 250 with some time on it.
Thanks MT i will check mine tonight!
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Old 06-10-2015 | 02:46 PM
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Originally Posted by SB
Wasn't commandersander outed as a liar selling a new part that wasn't ? Or do I have the wrong guy ?
Originally Posted by Black Baja
I think he was the one complaining about PayPal...

Yup. I remembered right.

Click Here: http://www.offshoreonly.com/forums/b...l-rip-off.html
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Old 06-10-2015 | 03:19 PM
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Originally Posted by SB
Yup. I remembered right.

Click Here: http://www.offshoreonly.com/forums/b...l-rip-off.html
I guess the "brand new blower with only dyno time" goes hand in hand with the NIB inverter. What a bunch of BS!! $3k f'ing dollars for what will probably end up being a heat pump once it's in the boat. Yes, I'm a little mad.
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Old 06-10-2015 | 07:30 PM
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Default 250 clearance

Originally Posted by MILD THUNDER
Normal is about .004-.006 on a used 250 with some time on it.
Well checked mine and it is at .008-.009 on each Teflon strip near top of the case
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Old 06-11-2015 | 07:04 PM
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Just keep in mind that boost PSI is a reference of airflow restriction. With your blower not getting hot at all,(blower not working very hard) then it could possibly be that your camshaft and head flow is working really well and thus your boost psi. reading is low.
Just a thought.
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Old 06-11-2015 | 07:09 PM
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Originally Posted by Fountainfunatic
Just keep in mind that boost PSI is a reference of airflow restriction. With your blower not getting hot at all,(blower not working very hard) then it could possibly be that your camshaft and head flow is working really well and thus your boost psi. reading is low.
Just a thought.
Appreciate it, but see the post above about the clearances being way out of spec. My understanding is that anything over .008 needs servicing. There's no way this blower will build strong boost until its serviced.
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