lost compression in 1 cylander
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Senior User
Joined: Jun 2006
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From: peterborough ontario
lost compression in 1 cylander
so we blew up my poor old 302 saterday afternoon . I want to rebuild it and up the proformance i would like around 300 hp the trucks is a 92 f150 302 4x4 am i dreaming or do i need mass air to get that much
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Low CR on 1 cylinder could just be a chipped valve but it could also be a hole in a piston if there is noticable oil consumption now. 300hp on SD is not at all unreasonable, use a HO cam with 1.7 rockers and install a full exhaust system and you pretty much have it.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
I mentioned the cam already. Use flat top pistons with valve reliefs for future considerations.
How big are the trailers you tow? If it's much more than a few thousand pounds and especially if the truck has oversized tires then it should also get 4.10 gears.
How big are the trailers you tow? If it's much more than a few thousand pounds and especially if the truck has oversized tires then it should also get 4.10 gears.
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From: peterborough ontario
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Cargo Master
Joined: Dec 2004
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From: NE Texas
The firing order change requires no change in anything beyond switching around the spark plug wires to obtain the correct firing order.
Once you rebuild this engine, make sure the knock sensor is working properly. You should have never holed a piston with an EFI system and an operational knock sensor. Was it showing any trouble codes?
Once you rebuild this engine, make sure the knock sensor is working properly. You should have never holed a piston with an EFI system and an operational knock sensor. Was it showing any trouble codes?
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FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Agreed in thoery, but I had a knock sensor equipped motor that detonated so bad it lost power under load and there were never any codes set, so I'm not sure how effective the system is on these trucks.
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Senior User
Joined: Jun 2006
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From: peterborough ontario
cr compression ratio will .020 over with flat tops rase compression that much im replaceing the pistons so i thought i would up size a bit .should i just get stock ones and rings if theres no damage to the cyclander
