M62/90 Questions/Identification - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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

Reply
 
 
 
Thread Tools Search this Thread
Old 06-15-2009, 07:47 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Jun 2009
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
BahN is on a distinguished road
Arrow M62/90 Questions/Identification

Hey guys, I'll admit I do not have a Bonneville, however I thought you guys of all people will know the answer to this.

Is this a M62 or M90?
I don't know what year of Bonneville this SC came out of.
On the bottom it says Rev R or A?

Also, I'd like to know as much as I can about this design of Eaton SC.
I'll be the first to admit, i know absolutely nothing about this SC.
If anyone could please just point out what each port is for and etc. That would be a massive massive help and would be greatly appreciated.

Pictures:







Thanks a lot guys!
BahN is offline   Reply With Quote
Old 06-15-2009, 09:33 PM   #2
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default

M62!

The M62 supercharger was manufactured by Eaton, exclusively for the GM 3800 engine. HP was rated at 205 for 1991-1993 engines (models vary), and 225 for 1994-1995 engines.

The M62 is a roots style blower Roots type supercharger - Wikipedia, the free encyclopedia

The large triangle hole is the blower discharge to the intake manifold. the two round holes are intended to minimize the SC whine and are often referred to as 'silencers'.

Picture two is the by-pass valve. this decreases SC pressure when backing off the throttle, and putting the car in reverse. It keeps things from going kaboom!

Picture three is where the throttle body is attached.

Hope this helps.
Purplehazeir is offline   Reply With Quote
Old 06-15-2009, 09:44 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Jun 2009
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
BahN is on a distinguished road
Default

Fantastic sir, you were of great help!

May i just ask you one thing, how were you able to identify it as a M62?
BahN is offline   Reply With Quote
Old 06-15-2009, 09:44 PM   #4
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Picture 4 is the BCS, Boost control solenoid.
Danthurs is offline   Reply With Quote
Old 06-15-2009, 09:45 PM   #5
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

The shape of the case and the short snout.

This is a M90
Name:  P1270003.jpg
Views: 79
Size:  111.4 KB
Danthurs is offline   Reply With Quote
Old 06-15-2009, 09:55 PM   #6
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Jun 2009
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
BahN is on a distinguished road
Default

Can anyone explain exactly how the BCS works? Thanks again guys!
BahN is offline   Reply With Quote
Old 06-15-2009, 10:39 PM   #7
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default

The BCS is the device that opens and closes the boost by pass valve. Also..the snout is longer on the M90, but the silencer holes are different also. The M90 silencers are slits, where the M62 are holes. See Dan'* photo below. Notice the slits in the SC lower compared to the holes in the photo of your M62.
Purplehazeir is offline   Reply With Quote
Old 06-15-2009, 10:43 PM   #8
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I do have all the pictures Kevin.

Name:  P1270023.jpg
Views: 83
Size:  220.5 KB
Danthurs is offline   Reply With Quote
Old 06-15-2009, 10:48 PM   #9
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
I do have all the pictures Kevin.

I went a looking and figured you'd post one up. I changed my post to include a lookey loo at this photo and compared to the M62.

Thanks buddy!
Purplehazeir is offline   Reply With Quote
Old 06-15-2009, 11:02 PM   #10
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Jun 2009
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
BahN is on a distinguished road
Default

Ah, I see. What about this area here in red, what is this purpose of this if the outlined blue area is what provides the air?

Once again, I can't thank you enough for the wealth of information!



Also, I'm going to take a stab and say the BCS works off of vacuum correct? Vacuum at idle/lower revs is higher holding the valve open, but at higher revs vacuum decreases, allowing the valve to close. Correct?

Last edited by BahN; 06-15-2009 at 11:04 PM.
BahN is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Paint Code Identification Plate Locator & 92-06 Paint Co Peterg22000 Detailing & Appearance 16 07-08-2006 03:55 PM
wire identification Professor Fate Audio (and aftermarket electronics) 4 06-30-2005 01:46 AM
Part Identification jupiter66 1992-1999 2 09-23-2004 09:07 PM
Trim level identification question? crzydmnd72 1992-1999 18 05-18-2004 09:35 PM
Difference 92-93 M62 Supercharger and a 94-95 M62?? jscdoo Forced Induction 3 05-06-2003 11:15 PM


Tags
sc m62 m90 super charger

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:40 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.