454 thrown rod....need to upgrade
#1
SeaRay Sundancer
Gold Member
Thread Starter
Join Date: Nov 2005
Location: SW Missouri
Posts: 2,914
Likes: 0
Received 0 Likes
on
0 Posts
454 thrown rod....need to upgrade
Buddy threw a rod in his port 454 mag. 94 model, 385hp. I dont know anything about the 454s. Looking to rebuild the bad motor and then tear into both and get some more power. He is at 69 ish mph right now and would like 80 after its said and done. Anybody have a package deal on these motors to upgrade them? Any ideas or somebody to speak with that can point him in the right direction?
I think we will start with Tyler Crockett.
I think we will start with Tyler Crockett.
Last edited by tblrklakemo; 07-08-2008 at 01:44 PM.
#2
Registered
Platinum Member
Buddy threw a rod in his port 454 mag. 94 model, 385hp. I dont know anything about the 454s. Looking to rebuild the bad motor and then tear into both and get some more power. He is at 69 ish mph right now and would like 80 after its said and done. Anybody have a package deal on these motors to upgrade them? Any ideas or somebody to speak with that can point him in the right direction?
I think we will start with Tyler Crockett.
I think we will start with Tyler Crockett.
http://www.offshoreonlyclassifieds.c...o23259-en.html
I also have a pretty good 468 upgrade kit that I can send you. Have had real good luck with it in the past. Both engines will require an exhaust upgrade if it hasn't been done all ready.
Good Luck, Jeff
#3
Registered
Join Date: Aug 2005
Location: sint maarten
Posts: 1,491
Likes: 0
Received 0 Likes
on
0 Posts
you are going to have to make well over an additional 100 hp PER motor to even get close to the speeds you are talking about
at which point everything else you have is going to become marginal. do yourself a favor and buy a couple of nice injected 502 mpi takeouts from someone and just swap them out. youll save a bunch of money and end up boating this summer instead of reinventing the wheel with your old iron.
at which point everything else you have is going to become marginal. do yourself a favor and buy a couple of nice injected 502 mpi takeouts from someone and just swap them out. youll save a bunch of money and end up boating this summer instead of reinventing the wheel with your old iron.
#6
Registered
Platinum Member
you are going to have to make well over an additional 100 hp PER motor to even get close to the speeds you are talking about
at which point everything else you have is going to become marginal. do yourself a favor and buy a couple of nice injected 502 mpi takeouts from someone and just swap them out. youll save a bunch of money and end up boating this summer instead of reinventing the wheel with your old iron.
at which point everything else you have is going to become marginal. do yourself a favor and buy a couple of nice injected 502 mpi takeouts from someone and just swap them out. youll save a bunch of money and end up boating this summer instead of reinventing the wheel with your old iron.
#7
Registered
Join Date: Aug 2005
Location: sint maarten
Posts: 1,491
Likes: 0
Received 0 Likes
on
0 Posts
so... he takes a 385 hp 454 adds 14 cubic inches and an exhaust system and suddently makes 500 hp ?
ohhhh you meant the 468 with different heads and cam, and another point or two of compression ... and then add the forged crank and rods ............
like some whole other motor 468...
his numbers suggest about 1050 to 1100 hp to get that boat to 80
no clapped out beater 454 rebuilds are likely to do that without simply lifting up the valve covers and sliding some other motor underneith them.
but, of course thats just a guess on my part.
ohhhh you meant the 468 with different heads and cam, and another point or two of compression ... and then add the forged crank and rods ............
like some whole other motor 468...
his numbers suggest about 1050 to 1100 hp to get that boat to 80
no clapped out beater 454 rebuilds are likely to do that without simply lifting up the valve covers and sliding some other motor underneith them.
but, of course thats just a guess on my part.
#8
Registered
Platinum Member
so... he takes a 385 hp 454 adds 14 cubic inches and an exhaust system and suddently makes 500 hp ?
ohhhh you meant the 468 with different heads and cam, and another point or two of compression ... and then add the forged crank and rods ............
like some whole other motor 468...
his numbers suggest about 1050 to 1100 hp to get that boat to 80
no clapped out beater 454 rebuilds are likely to do that without simply lifting up the valve covers and sliding some other motor underneith them.
but, of course thats just a guess on my part.
ohhhh you meant the 468 with different heads and cam, and another point or two of compression ... and then add the forged crank and rods ............
like some whole other motor 468...
his numbers suggest about 1050 to 1100 hp to get that boat to 80
no clapped out beater 454 rebuilds are likely to do that without simply lifting up the valve covers and sliding some other motor underneith them.
but, of course thats just a guess on my part.
But, I thought that would have been obvious to anyone with your expertise in power to weight ratios, and advanced hydrodynamics to calculate boat speed.
Sorry for just being a dumb engine guy.
Thanks for being THAT guy.
I guess they should have an IQ test before they let you into the Tech forum.
#9
Registered
Platinum Member
Once you are all ready rebuilding the engine anyway. It is only a few dollars more in parts, labor stays the same, to build a stronger 454. It doesn't really matter what the over bore is.
It sounded from the first post that he was on a budget.
Anyway, I will get off of your thread now since it appears that there is a know - it - all that wants to wear the big britches in here.
Sorry for trying to help.
It sounded from the first post that he was on a budget.
Anyway, I will get off of your thread now since it appears that there is a know - it - all that wants to wear the big britches in here.
Sorry for trying to help.
Last edited by jeff1000man; 07-08-2008 at 06:28 PM.
#10
SeaRay Sundancer
Gold Member
Thread Starter
Join Date: Nov 2005
Location: SW Missouri
Posts: 2,914
Likes: 0
Received 0 Likes
on
0 Posts
I always thought it took about 15hp to gain a mph......this guys boat is an older 32 baja. Heavy and straight. He can gps at 69 right now. With close to 500hp crockett 454's he should be close to 80.....I would think. And yes, this is a budget deal and it would be nice to keep the same motors so he doesnt have to mess with anything else like mounts, guages, etc.
Does a thrown rod usually mess anything up in the block itself?
Does a thrown rod usually mess anything up in the block itself?