ADTR wishes to make Ported & Polised Eaton M62's.... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

View Poll Results: Would you buy a Ported & Polished Eaton M62?
Yes, I want to give my money to ADTR now! 3 23.08%
Perhaps...... Does it make 40HP-50HP? 7 53.85%
No....I will just wait when I can convert my engine to a turbo setup to make 400HP... 3 23.08%
Voters: 13. You may not vote on this poll

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Old 12-20-2002, 05:58 AM   #1
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Default ADTR wishes to make Ported & Polised Eaton M62'*....

I had a thought, I see Eaton M62'* all the time for cheap and I figured I might as well pick one up, rebuild it, and port and polish and improve its design. I was wondering how many people would be intersted in this? It would pick up some good power and I was thinking it would be a Port and Polish and a fresh supercharger rebuild so you can have good reliability and more power. I was hoping Willwren might want to test this out. Just use the poll above.

If you have questions or ideas, just post them here so everyone can see them and maybe it will answer their questions.

-Hector
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Old 12-20-2002, 01:37 PM   #2
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I'm not really sure you'd need to port the intake to match, but have you thought about it? This does sound interesting, but remember, there'* 2 different M62'* depending on year. I can give you the p/n'* if you need 'em.

Also, this is new territory for me.....how much boost can you go without worrying about the lower intake seals? My new pulley is on the way, and that combined with the water injection will be pushing me somewhere around 12-14 pounds of boost (with your intake feeding the whole mess). Just wanna make sure I'm not going to have to rip it all apart later.
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Old 12-20-2002, 03:46 PM   #3
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Quote:
Originally Posted by willwren
I'm not really sure you'd need to port the intake to match, but have you thought about it? This does sound interesting, but remember, there'* 2 different M62'* depending on year. I can give you the p/n'* if you need 'em.

Also, this is new territory for me.....how much boost can you go without worrying about the lower intake seals? My new pulley is on the way, and that combined with the water injection will be pushing me somewhere around 12-14 pounds of boost (with your intake feeding the whole mess). Just wanna make sure I'm not going to have to rip it all apart later.
You sure your Eaton M62 can provide 12-14 lbs of boost reliable? The ineffecieny should have taken over by then. The Eaton M90'* start struggling after 10 psi. If we rebuild the supercharger they would be made to withstand the higher boost settings. I am ok w/ 2 different M62, but I am sure they can be improved.
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Old 12-20-2002, 11:22 PM   #4
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How much do you think cooling it will help? I have a couple ideas.
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Old 12-20-2002, 11:39 PM   #5
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Quote:
Originally Posted by willwren
How much do you think cooling it will help? I have a couple ideas.
It'* not really a matter of cooling, its just reached its effeciency period. You have to accept that the Eaton M62 can only go so far. It'* a fact of life, certain superchargers and turbo'* have limits. A 60 series T3 Turbo will not go past 325HP, all it does is generate more heat and burn it up. The Eaton M62 has limits and a 3.8L makes it reach quickly. Even the M90 does it quickly. That'* why you move up to a M112 or chuck it for a whole new approach, like Centrifgal or Turbo. Yeah you could do ZZP'* Stage 4 Porting and Polishing for the M90, but you could have done a turbo setup for well under 1/2 their price. I want to try and push and find out how far the Eaton M62'*. But I want to do it because most of the Bonneville owners on this board have Series I engines and you can make more power, just no one has done the R&D or tried.

Cooling will help, but you have to accept that the Eaton is the problem, not cooling.
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Old 12-20-2002, 11:58 PM   #6
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Here'* some stuff to shoot down then:

I've talked to 3 guys who have gone to the 2.25" pulley, and all 3 back up SCPerformance'* claim of 2psi boost gain. SCPerformance also told me stepping further down to the 2" probably wouldn't gain anything, but I wouldn't anyway, as I don't want that sucker spinning that fast.

From this info, it seems I CAN gain another 2 pounds for a total of 12, but that may be the performance cap without further mods. I know you're not a fan of my water injection, but pretend you are for a minute. The water injection should help to cool the blower by quite a bit, as well as increase the air density before it even enters the blower. What would you give me for that? Maybe Another 1psi?

On top of all that, 95BonnevilleSESC and I have been talking about fabbing a duct that would cool the Eaton, by blowing across the top cooling fins. Fresh air from the grille. I should be able to reduce the blower temp by another 10 at normal driving speeds that way.

The real reason for the water injection for me, anyway, was to be able to go with the smaller pulley and keep some peace of mind. I don't want to add more heat to that sucker, and I think the H20 will actually make it run cooler even with the smaller pulley.

The new pulley will be turning my M62 at 17,000 RPM'* as opposed to the stock 12,000. This is an increase of 20%, and I know the heat is going to develop faster at the higher rpms, and at an exponential rate. That extra boost comes at a pretty steep price. Now you know the math behind the water injection brainstorm.

So what could I expect from your Modified M62?
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Old 12-21-2002, 12:12 AM   #7
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Quote:
Originally Posted by willwren
So what could I expect from your Modified M62?

Interested in testing one out? I am curious as well.
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Old 12-21-2002, 02:06 PM   #8
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Can't you see me drooling? And checking my wallet? I'll sell one of my kids for it.
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Old 12-21-2002, 03:22 PM   #9
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Quote:
Originally Posted by willwren
Can't you see me drooling? And checking my wallet? I'll sell one of my kids for it.
Well now we know what'* REALLY important to you!

j/k

Give me turbo or nitrous. The end.
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Old 12-25-2002, 01:29 PM   #10
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Quote:
The new pulley will be turning my M62 at 17,000 RPM'* as opposed to the stock 12,000. This is an increase of 20%
17,000 - 12,000 = 5,000 RPM Increase

5,000 / 12,000 = 41.6~

Those numbers equate to a 41% Increase... I would be very worried about the reliability of a M62 spinning 41% faster than it was designed to....

Just my thoughts though....

Ben
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