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Old 08-06-2017, 10:03 AM   #1
68gmsee
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Sealed Power Pistons?

Anyone have experience with this brand? I see them advertised quite a bit.

I'm waiting for the weather to cool down some so I can start back on my 350 in the garage. It's been bored .030 over and is not going to be performance engine.
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Old 08-06-2017, 10:15 AM   #2
Warrens69GMC
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Re: Sealed Power Pistons?

Many people have. What is the engine combo you are thinking of putting together?
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Old 08-06-2017, 10:49 AM   #3
68gmsee
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Re: Sealed Power Pistons?

The engine is a stock 77 Impala 350 with 4 barrel Quadrajet. Strictly for occasional driving for my 69 when completed. Heads are also stock out of the same engine.

Last time I had new pistons on an engine was about 15 years ago and don't even remember the brand I used then.
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Old 08-06-2017, 10:53 AM   #4
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Re: Sealed Power Pistons?

I have a set of flat tops hypereutectic's in my 355. Never had a problem with them. They are good pistons for a street engine that doesn't see a lot of rpm.
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Old 08-06-2017, 11:21 AM   #5
68gmsee
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Re: Sealed Power Pistons?

Haven't found any negative articles about them. I did find that Sealed Power and Speed Pro are made by Federal Mogul. Reasonably priced also.
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06 Trailblazer
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Old 08-06-2017, 11:30 AM   #6
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Re: Sealed Power Pistons?

Btw: What's the going rate to have the connecting rods removed from the old pistons and new ones put on? The last ones I had done the shop did the engine re-boring and piston swap together.

I see a lot of Youtube videos for doing it yourself, but I don't want to mess with at this time.
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Old 08-06-2017, 10:04 PM   #7
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Re: Sealed Power Pistons?

If these are the old forged pistons sold under the TRW name they are great!
I have had a set in a 0.060" over 396 and they have survived well.
These are probably more piston than your application needs , but if your bore to piston
clearance is machined correctly they will be great and strong!
All the best,
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Old 08-07-2017, 05:31 AM   #8
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Re: Sealed Power Pistons?

Sealed Power slugs. Built hundreds of engines with them - 2256F (forged). No complaints.
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Old 08-07-2017, 11:05 PM   #9
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Re: Sealed Power Pistons?

I hope they are good. I just bought a set for my 455!
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Old 08-07-2017, 11:55 PM   #10
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Re: Sealed Power Pistons?

I bet I've put them in at least a dozen or more engines. Good pistons!

Gary
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Old 08-08-2017, 08:33 AM   #11
68gmsee
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Re: Sealed Power Pistons?

Thanks for input. I'll ordered a set...

Also found out a local small machine shop will remove old pistons and install new ones for $40 a set.
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69 Chevy 350/350 currently in pieces still lookin for a cab
06 Trailblazer
And the workhorse: Massey Ferguson 135 three cylinder Perkins diesel.
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Old 08-11-2017, 12:31 PM   #12
68gmsee
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Re: Sealed Power Pistons?

Engine is a 350 bored .030 over and is for an occasional driver/street use.

Ordered a set of sealed power hypereutectic cast pistons from local auto parts. Came as a set with wrist pins and rings and had to return the set.

Reason for return:

Pistons fit fairly decent with a tight .002 feeler guage on one side of the skirt. Measuring piston vs skirt width with two digital micrometers showed a .0015 difference which was withing specs. However, the rings showed a wide gap of .040 +/- .005 on several cylinders.

In the past most rings I've bought have had to be filed slightly to gap them correctly so I figured they had sent the rings for a standard 4.00" bore. The .040 ring gap would have been about .010 in a stock block.
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68 GMC 250/3 speed Saginaw p/b p/s
69 Chevy 350/350 currently in pieces still lookin for a cab
06 Trailblazer
And the workhorse: Massey Ferguson 135 three cylinder Perkins diesel.
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