OK Motor heads! 454 4 bolt...
#1
Guest
Posts: n/a
![Post](/forums/images/icons/icon1.gif)
I am looking at an engine put together by a local engine shop (they do a ton of local circle track stuff as well as some boat engines)
Not sure of ALL of the components but here is what I know now...
454 4 bolt main, line honed, bored 30 over, balanced, decked and has an "Eagle" kit (not sure what that is but it consisted of pistons, aftermarket rods, etc). File fit rings, roller cam (not sure which), roller lifters...All good stuff.
Not been on a dyno but a rough guestamate is 475 to 500hp. Only issue is it is most likely high compression (at least 10:1). Aluminum 8 quart oil pan.
More details to come...Never been cranked (built 2 years ago and buyer skipped town).
Less carburetor, he is asking 5650.00...
Any thoughts or things I should look for/ask about? I thought a set of Stainless or Gill exhaust and I am in business! High compression scares me though...
Not sure of ALL of the components but here is what I know now...
454 4 bolt main, line honed, bored 30 over, balanced, decked and has an "Eagle" kit (not sure what that is but it consisted of pistons, aftermarket rods, etc). File fit rings, roller cam (not sure which), roller lifters...All good stuff.
Not been on a dyno but a rough guestamate is 475 to 500hp. Only issue is it is most likely high compression (at least 10:1). Aluminum 8 quart oil pan.
More details to come...Never been cranked (built 2 years ago and buyer skipped town).
Less carburetor, he is asking 5650.00...
Any thoughts or things I should look for/ask about? I thought a set of Stainless or Gill exhaust and I am in business! High compression scares me though...
#2
Registered
Join Date: Oct 2000
Location: On the river
Posts: 3,372
Likes: 0
Received 0 Likes
on
0 Posts
![Post](/forums/images/icons/icon1.gif)
get the specs on the cam, to see if the cam is even close to the rpm range for the boat.. I have run 10:1 comp ratio on the last 461 we had in the boat, ran 93 octane with no problems..
#5
I hate the winter!!
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes
on
0 Posts
![Post](/forums/images/icons/icon1.gif)
If the motor was built 2 years ago, I would find out how it was stored. Rust can form in the cylinders, no telling what else can happen internally. BEWARE!!!
#6
Official OSO boat whore
![](https://www.offshoreonly.com/forums/images/icons/charter_member_star.gif)
Join Date: Oct 2000
Location: Mequon, WI
Posts: 6,157
Likes: 0
Received 0 Likes
on
0 Posts
![Post](/forums/images/icons/icon1.gif)
That compression ratio sounds aful high. I've also been repeatedly told that you can not get 500hp from a N/A 454. For exhaust, I suspect that you are going to need a true header for scavenging.
#8
Registered
Join Date: Aug 2001
Location: Gainesville Fl.
Posts: 573
Likes: 0
Received 0 Likes
on
0 Posts
![Post](/forums/images/icons/icon1.gif)
two years??????? I would wonder! I had 454 mag rebuilt,If I had it to do all over from the get go I thing I would buy more hp in the crate,somewhat worry free for sometime to come.just my .01 cent don't have .02
#10
Were doomed!
![](https://www.offshoreonly.com/forums/images/icons/charter_member_star.gif)
![Arrow](/forums/images/icons/icon2.gif)
Also make sure the centerline of that cam is good for marine use!!! You dont want to be getting reversion into a motor you just bought!!
![Frown](/forums/images/smilies/frown.gif)
__________________
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!