One fairly fat chub equivalent in the back seat from the SBC to the BBC. About a half a chub from the Alpha to the Bravo.

 

I'll tell ya where the "chub" comes from...knowing that you won't smoke a drive when you nail it!! I've got 330 in front of an unkown Alpha 1 gen 1 and I am always carefull with the stick, I hate the unknown. I want to NAIL it and not worry about it!

Oh, BTW, Merc's book say's that a 5.7L weighs 480#'S.
That is for heads & block,etc.

454 weighs 694#s per their core return policy.

 

Thanks FTM thanks chubball.

Anybody know about the drives?

 

Kind of, I recently removed and installed an Alpha and Bravo by myself with no jack.

Don't ask. :angry1:

Anyways - I would say the Bravo weighs 20-25 lbs or so more than the Alpha.

My 'Back O Meter' is fairly accurate. :laugher: :laugher:

 

Nice info . Backometer i like that

 

So pound for pound
How much is a
454 w bravo poundtotal?
454w alpha
350 w bravo
350 w alpha

 

Bling : A wise man once told me

A slow reliable boat is always better than a fast broke boat

I think you where passed out at the time and that was a female talking to you.

If not, you are hanging out with the wrong wise man.

:laugher: :laugher: :laugher:

 

I think you where passed out at the time and that was a female talking to you.

If not, you are hanging out with the wrong wise man.

:laugher: :laugher: :laugher:

:laugher: :laugher: :laugher: :laugher: :laugher:

 

Here's some weights:
Includes engine AND drive.
===
5.7 260hp, Alpha: 946 lbs
5.7 260hp, Bravo 1: 987 lbs

350 mag, Alpha: 952 lbs
350 mag, Bravo 1: 993 lbs

454 mag MPI, Bravo 1: 1,177 lbs

496 mag MPI, Bravo 1: 1,199 lbs

502 mag MPI, Bravo 1: 1,189 lbs

HP500EFI, Bravo XZ: 1,113 lbs

HP900SC, #6 drive: 1,620 lbs
===
Kent

 

Here's some weights:
Includes engine AND drive.
===
5.7 260hp, Alpha: 946 lbs
5.7 260hp, Bravo 1: 987 lbs

350 mag, Alpha: 952 lbs
350 mag, Bravo 1: 993 lbs

454 mag, Bravo 1: 1,177 lbs

496 mag MPI, Bravo 1: 1,199 lbs

502 mag MPI, Bravo 1: 1,189 lbs

HP500EFI, Bravo XZ: 1,113 lbs

HP900SC, #6 drive: 1,620 lbs
===
Kent

Thanks Kent awesome info

 

Lose cast iron intake - 20lbs on SBC and 30lbs on big block

Lose cast iron exhaust manifolds - 40-50lbs on either

Lose cast iron cylinder heads - 20lbs or so on SBC and 40lbs or so on BBC

Now whe are talking !!!

Put the motor on a diet and it's just as good as more hp !!!

:bigsmile: :bigsmile: :laugher: :laugher:

 

Looks like blinger lost 190 lbs., I gained 41 going to Bravo but I put Lightning headers on last year so I lost another 80-100.

 

Woohoo i wonder what thats does vs hp between 454 and 350 vs weight i should be close to pushing the same

 

Boats are way different within each other but with cars 100lbs can equal 10hp. So, 1000lbs can equal 100hp. :bigsmile: :bigsmile:

Weight matters ! Extra weight cust speed and extra weight puts more stress on the engine and outdrive.

There's a reason why small cats with huge motors can use stock/near stock Bravo's. :bigsmile:

 

Another good reason to not top off your fuel tank, bling.

 

Another good reason to not top off your fuel tank, bling.

yep

 

Woohoo i wonder what thats does vs hp between 454 and 350 vs weight i should be close to pushing the same

As has been said, weight is a huge factor.

With a SBC vs a BBC, there is also a huge torque difference.

With an SBC, you need to prop at the top end of the HP curve even more, for max speed.

With my boat for instance, it is only available now with a SBC 350 mag. The speed difference between that (300hp) and the older available 7.4mpi (310hp) is virtually the same in top end. But the hole shot and acceleration is better with the BBC.

Now, ask me if what I have for power now makes any difference!!!!
Kent

 

does it make a difference

 

Bling, I now have an HP500 carb in my boat, installed last winter!!

My old power was a 7.4mpi.

You can do the math, but I went from 63 gps on a perfect day to 75 gps on an average day. My best has been 78.2 gps! The 80mph Gaffrig II speedo is normally BURIED!

Here's a motor pic just before installation...
Kent

 

Torque accelerates the prop speed (thus accelerates the boat) - horsepower maintains the speed.

 

Bling, I now have an HP500 carb in my boat, installed last winter!!

My old power was a 7.4mpi.

You can do the math, but I went from 63 gps on a perfect day to 75 gps on an average day. My best has been 78.2 gps! The 80mph Gaffrig II speedo is normally BURIED!

Here's a motor pic just before installation...
Kent

Damn awesome did you see my braded hose thread that what i am looking to do nice detail

 

Torque accelerates the prop speed (thus accelerates the boat) - horsepower maintains the speed.

So correct me if i am wrong . You need the hp and torgue for turning big wheels or props at the bottom . And thus this relate to more top end becaude you are spinning a higher pitch at same rpm