Tired 454 Magnum
10-07-2007, 03:27 PM
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Tired 454 Magnum
I'm looking for a little advice. My 1989 Formula 242LS has a 454 Magnum, 365 hp Mercruiser engine. I boiught it about 4 years ago, when I bought it I could get it to just under 59mph on the speedo. This year I can barely get over 50. The engine has almost 1500 hours, (yes hundred) I know that's a lot, so I did a compression check, all but 2 cylinders were very close to 145, which I think is low, but one cylinder was only 115, and the other was 135.
My thoughts are, this engine is tired, I need to replace it. The question is, what are my options. Assuming I want to spend less than $5000, shuold I go with a crate moter, re-manufactured moter, can I upgrade to a 502, are there any good used engines out there? And what are some good reliable companies to go with for an engine?
If anyone has gone through something like this, I would really appreciate any advice you could give.
My thoughts are, this engine is tired, I need to replace it. The question is, what are my options. Assuming I want to spend less than $5000, shuold I go with a crate moter, re-manufactured moter, can I upgrade to a 502, are there any good used engines out there? And what are some good reliable companies to go with for an engine?
If anyone has gone through something like this, I would really appreciate any advice you could give.
10-07-2007, 03:45 PM
#2
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Just rebuild it with some hp upgrades. Pretty easy to get 425-450hp out of it, but you will need an exhaust upgrade.
The 145# of compression is about what it should have.
The 145# of compression is about what it should have.
10-07-2007, 05:22 PM
#3
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Cliff,
You did not mention where you are located, but in the Southern Maryland area where I am, an 18 year old raw water cooled 454 with 1500 hours on it will have so much corrosion in the block and heads that I would normally not even want to look at it. There are a few exceptions, but that is the norm. Keep in mind when you are figuring out costs that the manifolds and risers will probably have to be replaced also. Figure on intake manifold also. I think you will be hard pressed to do the whole thing correctly for 5K
Just my opinion,
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
You did not mention where you are located, but in the Southern Maryland area where I am, an 18 year old raw water cooled 454 with 1500 hours on it will have so much corrosion in the block and heads that I would normally not even want to look at it. There are a few exceptions, but that is the norm. Keep in mind when you are figuring out costs that the manifolds and risers will probably have to be replaced also. Figure on intake manifold also. I think you will be hard pressed to do the whole thing correctly for 5K
Just my opinion,
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
10-07-2007, 05:41 PM
#4
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I'm looking for a little advice. My 1989 Formula 242LS has a 454 Magnum, 365 hp Mercruiser engine. I boiught it about 4 years ago, when I bought it I could get it to just under 59mph on the speedo. This year I can barely get over 50. The engine has almost 1500 hours, (yes hundred) I know that's a lot, so I did a compression check, all but 2 cylinders were very close to 145, which I think is low, but one cylinder was only 115, and the other was 135.
My thoughts are, this engine is tired, I need to replace it. The question is, what are my options. Assuming I want to spend less than $5000, shuold I go with a crate moter, re-manufactured moter, can I upgrade to a 502, are there any good used engines out there? And what are some good reliable companies to go with for an engine?
If anyone has gone through something like this, I would really appreciate any advice you could give.
My thoughts are, this engine is tired, I need to replace it. The question is, what are my options. Assuming I want to spend less than $5000, shuold I go with a crate moter, re-manufactured moter, can I upgrade to a 502, are there any good used engines out there? And what are some good reliable companies to go with for an engine?
If anyone has gone through something like this, I would really appreciate any advice you could give.
10-07-2007, 07:15 PM
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Tired 454
I would be very interested in that motor if he still has it.
Have him e-mail me at [email protected]
Have him e-mail me at [email protected]
10-07-2007, 07:24 PM
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I would be very interested in that motor if he still has it.
Have him e-mail me at [email protected]
Have him e-mail me at [email protected]
10-07-2007, 07:47 PM
#7
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I would be very interested in that motor if he still has it.
Have him e-mail me at [email protected]
Have him e-mail me at [email protected]
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242 Formula
