The proof is in. Don't EVER paint a supercharger. - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 03-18-2007, 05:27 PM   #11
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Originally Posted by Sol
Isn't the M62 coated differently than the M90? Would this affect results?

What about some of the aftermarket roots blowers that come painted black or with a high polish coating?
the M90 Gen 3 and the GenV dont have coatings when they are shipped out of the factory at GM

i have seen a rebiult unit that Boosty had grabbed from the yard..... it had a coating similar to the M62.......

the M90 Gen 3 and the GenV dont have coatings when they are shipped out of the factory at GM
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Old 03-18-2007, 07:10 PM   #12
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Reasons the M90'* are typically not coated:

1. Engine cover hides all but the nosedrive, which is painted.
2. Nosedrive is probably also painted to ease cleaning belt dust off it.
3. Coating is expensive.
4. Coating isn't as necessary on the M90, as it spins slower to produce the same boost-and should run cooler.
5. Coating and curing costs time in assembly.

Save labor and money. The bottom line.
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Old 03-18-2007, 07:39 PM   #13
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Originally Posted by willwren
Supercharger (scrappy dude good for nothing but a paper weight) heated to 350 degrees F. Initial temp taken on all four quadrants.

Further data taken in 5-minute intervals only comparing top to bottom on each half (for thermal mass variation). Comparing OEM Eaton paint to 2 different options.

In comparing the "Mystery" paint in the second graph to the "OEM" paint in the first graph, it seems as if the "OEM" outcooled the "Mystery" in the first test, but not the second.
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Old 03-18-2007, 07:42 PM   #14
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Jim, look at WHERE the paint samples are in the pics. The thermal mass is totally different on each end of the SC.

The two OEM'* and two Black paints CANNOT be compared. The rotor end of the SC cools much quicker than the inlet end. I only tested this way to be able to run both tests on one scrap SC.
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Old 03-18-2007, 08:12 PM   #15
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Quote:
Originally Posted by willwren
Jim, look at WHERE the paint samples are in the pics. The thermal mass is totally different on each end of the SC.

The two OEM'* and two Black paints CANNOT be compared. The rotor end of the SC cools much quicker than the inlet end. I only tested this way to be able to run both tests on one scrap SC.
Oh, different ends of the housing. Nevermind, then.
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Old 03-18-2007, 08:14 PM   #16
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Quote:
Originally Posted by willwren
Reasons the M90'* are typically not coated:

1. Engine cover hides all but the nosedrive, which is painted.
2. Nosedrive is probably also painted to ease cleaning belt dust off it.
3. Coating is expensive.
4. Coating isn't as necessary on the M90, as it spins slower to produce the same boost-and should run cooler.
5. Coating and curing costs time in assembly.

Save labor and money. The bottom line.
Well, reason I ask these questions is because there are a lot of M90 powered cars running very fast times, which have painted or powdercoated blowers.
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Old 03-18-2007, 08:15 PM   #17
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And different black paints on either end.
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Old 03-18-2007, 08:21 PM   #18
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Quote:
Originally Posted by Sol
Quote:
Originally Posted by willwren
Reasons the M90'* are typically not coated:

1. Engine cover hides all but the nosedrive, which is painted.
2. Nosedrive is probably also painted to ease cleaning belt dust off it.
3. Coating is expensive.
4. Coating isn't as necessary on the M90, as it spins slower to produce the same boost-and should run cooler.
5. Coating and curing costs time in assembly.

Save labor and money. The bottom line.
Well, reason I ask these questions is because there are a lot of M90 powered cars running very fast times, which have painted or powdercoated blowers.

And they'd likely run slightly quicker if they didn't. We're talking very little power difference here. But if you're serious about performance, why on EARTH would you paint or powdercoat?
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Old 03-18-2007, 08:21 PM   #19
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Quote:
Originally Posted by Sol
Quote:
Originally Posted by willwren
Reasons the M90'* are typically not coated:

1. Engine cover hides all but the nosedrive, which is painted.
2. Nosedrive is probably also painted to ease cleaning belt dust off it.
3. Coating is expensive.
4. Coating isn't as necessary on the M90, as it spins slower to produce the same boost-and should run cooler.
5. Coating and curing costs time in assembly.

Save labor and money. The bottom line.
Well, reason I ask these questions is because there are a lot of M90 powered cars running very fast times, which have painted or powdercoated blowers.
With no intercooler?
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Old 03-18-2007, 08:27 PM   #20
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Quote:
With no intercooler?
Yes,

Merc-last year-er um 2005 GenV
greg was-going after non I/C record GenV
me-last yr. GenV

I'm sure there'* plenty more
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