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(3/23/2014 8:21:23 AM)
RE:Valve Spring Failure on Massey 25
I think there were several reasons for the MIA manifold to be so popular. I am sure if you hooked a MH 25 on a piece of equipment and worked it for 10-12 hours a day it would not take long at all to burn out the gaskets and warp the manifold and I am sure a lot of these 25 in Canada did not sit still much they were bought to use and they got used.
When you went into the dealer I am sure it did not take much at all to convince the owner that MIA manifold was the way to go if it would put out more horse power and from the looks of the design I am sure it was a lot more efficient than the original. If you look at the air flow pattern in the MIA manifold it was in a much straighter line than the original having to turn a 90 degree angle to get up the pipe. I bet the air flow rate was much better from the looks of it so It is not hard to see how it would give you a couple extra horse power.
The next thing is the price, If the MIA manifold was $10.00 cheaper and would give more power and use less fuel it was an easy sell to the customer. I am thinking the MIA manifolds were like the M&W piston kits that were put in many tractors over the years around here. If you had your tractor in the shop getting rebuilt and tuned up for the season you surely would go with what would give you an edge over your neighbor or competitor so why not.
The MIA manifold must have had a good reputation for being better or cheaper as I have seen these on many other makes of tractors over the years.
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