M62 Supercharger Limit!
07-14-2005, 08:51 PM
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M62 Supercharger Limit!
I talked with Magnuson today and they said our Eaton M62 Blower should not exceed 14,000 Max RPM. Does anyone know how fast our M62 Blower is spinning with the stock 3.5 inch pulley? I was told by the tech at Magnuson to measure the blower pulley and the crank pulley, then calculate the ratio between the two. Then I should be able to tell the stock operating blower rpm. uh okay....Lil help please.....
You would get away with the 2.8' pulley but I won't recommend any lower. Just makes a **** load of heat and won't measure any real results.
07-14-2005, 09:08 PM
#3
http://www.harrop.com.au/root_folder...eaton-m62.html
found some info on it. It says it's max output is 2bar. 1 bar is 14.7 so 2 bar must be 29.4psi.
I dont think it is even close to 14,000 rpm with the 3.5 pulley.
I doubt it's safe to run it at 2bar, It would probably decrease the life of the blower dramatically.
found some info on it. It says it's max output is 2bar. 1 bar is 14.7 so 2 bar must be 29.4psi.
I dont think it is even close to 14,000 rpm with the 3.5 pulley.
I doubt it's safe to run it at 2bar, It would probably decrease the life of the blower dramatically.
07-15-2005, 10:32 PM
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I think the stock crank pulley is 6.375". If the stock SC pulley is 3.5", that means at 6500 engine rpm, the SC is at ~11,800. With a 2.8" SC pulley, 6500 engine rpm would give you 14,800.
07-16-2005, 01:20 PM
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Thanks guyz! That helps! DanM if your right about the ratio then the 2.8in. pulley is too small for the M62 blower. It would cause it to run 800rpm over it's max rpm. Why would manufactures produce these small pulleys without doing proper research. That could ruin our blowers!
07-16-2005, 02:13 PM
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Originally Posted by dirtySSout
Thanks guyz! That helps! DanM if your right about the ratio then the 2.8in. pulley is too small for the M62 blower. It would cause it to run 800rpm over it's max rpm. Why would manufactures produce these small pulleys without doing proper research. That could ruin our blowers!
I'm not arguing with you, just asking where you got the information (and I don't think Magnusson, a competing company, is the best source).
Eaton's website shows the SC operating in a normal, linear region up to 14,000rpm. I would think from that, that it is probably just fine at 14,800. It may not be flowing much more (and just making more heat), but I doubt any damage will result.
07-20-2005, 08:55 PM
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Just some FYI...
On the Series II M90 SC Eaton shows charts only going up to 12000 rpm. It once was thought that going over 12k rpm wouldn't yeild any positive results...well if you check with the 3800SC guys now many of them are spinning the blower over 14k...just have to have the mods to support it.
On the Series II M90 SC Eaton shows charts only going up to 12000 rpm. It once was thought that going over 12k rpm wouldn't yeild any positive results...well if you check with the 3800SC guys now many of them are spinning the blower over 14k...just have to have the mods to support it.
07-21-2005, 05:21 PM
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Originally Posted by DanM
Who says 14,000rpm is the maximum, and that damage will result if spun faster?
I'm not arguing with you, just asking where you got the information (and I don't think Magnusson, a competing company, is the best source).
I'm not arguing with you, just asking where you got the information (and I don't think Magnusson, a competing company, is the best source).
"Eaton Supercharger Division is the largest manufacturer of automotive superchargers in the world. They manufacture superchargers for original equipment applications for several models of Mercedes Benz, General Motors, Ford, Nissan, Aston Martin, and Jaguar with others in the works. Magnuson Products, Inc. handles service and the aftermarket for Eaton Supercharger Division and provides superchargers to a number of companies that design and manufacture the installation system for specific applications. Magnuson Products, Inc. provides more superchargers for aftermarket applications than any other supercharger manufacturer in the world."
I've heard that 14,000 rpms is the maximum that Eaton recommends but the psi-fi kit is using a 2.8 pulley in thier kit and I think you'd be ok running one as long as you can get someone to tune your computer.
07-21-2005, 06:58 PM
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Magnuson / Eaton tend to be VERY conservative with requards to SC RPM's, however at some point you will exceed the volumetric efficiency of the blower.
Here is some interesting info I found on the CAPA website.
MP62
Here is some interesting info I found on the CAPA website.
MP62
04-09-2011, 12:27 PM
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Thanks guyz! That helps! DanM if your right about the ratio then the 2.8in. pulley is too small for the M62 blower. It would cause it to run 800rpm over it's max rpm. Why would manufactures produce these small pulleys without doing proper research. That could ruin our blowers!
There are many people who have went all the way down to a 2.5" pulley, it's not going to be some dramatic failure - or kill your engine, it's just harder on the bearings.
04-09-2011, 12:39 PM
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04-09-2011, 12:46 PM
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Yea i wouldnt go by that "shouldnt go past 14,000rpm" bs...i ran a 2.8" pulley and my rev limit was 7500rpm...so i was well over the "14,000" limit and never had issues. I know guys that went to 2.6...some popped there engine but nothing happend to their blower.
04-10-2011, 12:31 AM
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I have been running a 2.85 pullies with 42 lb injectors for 5 years and over 100,000 miles. I am going to say you will alright. I have yet to rebuild my supercharger but I have changedd the oil twice.
04-10-2011, 01:20 AM
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For fucksake, there is a difference between SUSTAINED max rpm and max EFFICIENCY. I ran a 2.6 on an M62 for 50k miles. Not a single issue. No grinding. No knocking of the rotors. The motors of these cars are below 3k rpm which will NOT "max" the m62 out on rpms.
Use common sense.
You also do not need to change the oil until 100k
Use common sense.
You also do not need to change the oil until 100k
04-12-2011, 11:55 PM
#22
For fucksake, there is a difference between SUSTAINED max rpm and max EFFICIENCY. I ran a 2.6 on an M62 for 50k miles. Not a single issue. No grinding. No knocking of the rotors. The motors of these cars are below 3k rpm which will NOT "max" the m62 out on rpms.
Use common sense.
You also do not need to change the oil until 100k
Use common sense.
You also do not need to change the oil until 100k
