On Nov 3, 4:02?pm, Short Wave Sportfishing wrote:
On Sat, 03 Nov 2007 18:08:14 -0000, Tim wrote:

wrote:
I have a 32' Luhrs Sportfisher. Currently with Chrysler 318 engines.
I have 2 Chevrolet 350 4 bolt marine engines, one standard, one
reverse rotation. I would like to find out what spec. and what parts
I need to build these engines to 280 to 300 hp on carburators. The
boat weights 17000 lbs. It is my understanding I need foot lbs. of
torque more than rpm. Anyone know if there is a guide or book? Anyone
with information. Thanks in advance.

I'm not really sure, but one thing I'd like to know, is why would you
want to replace teh Chryslers with the chevys?

Not saying one brand is superior to the other, but your mounting and
manifolds and trans bolt patterns are completely different,a nd I
would think that it would take a lot more work to change over the
engines instead of rebuild the 318's.

Are the 318's the old "Big Blocks"? if so, they are vertually the
same blocks as the the 383's, 413,s qand 440's, which would be easier
to overhaul and get the horsepower/torque you're looking for.

If the 318's are the later "small block" versions, they are the same a
block as the 360 and late 60's 274, and you might be strained on
getting the results you desire.

Interesting - not that I don't believe you, but as far as I knew,
MOPAR never built a big block 318.

Then again, I'm not all that up on MOPAR stuff unless it involves the
440.- Hide quoted text -

- Show quoted text -

http://www.sweptline.com/tech/engines.html

Tom, Richard and everybody else. I DO STAND CORRECTED! The early 318
"A" was NOT clasified as a "Big Block" but rather a Polysphere (or
Wideblock) 318. Obviously not the same as the 318 "LA" which was
classed as a true "small block" but not the large 383-440 Big Block
either, even though it did have heavier castings and big block
"characteristics". But I'm still not sure if the 413 is in between
the 383-440's or if it was an over punched wide block 318.

Again I Humbly apologize.

You learn something everyday.

THANKS!
Tim

On Sat, 03 Nov 2007 17:43:13 -0700, Tim wrote:

On Nov 3, 4:02?pm, Short Wave Sportfishing wrote:
On Sat, 03 Nov 2007 18:08:14 -0000, Tim wrote:

wrote:
I have a 32' Luhrs Sportfisher. Currently with Chrysler 318 engines.
I have 2 Chevrolet 350 4 bolt marine engines, one standard, one
reverse rotation. I would like to find out what spec. and what parts
I need to build these engines to 280 to 300 hp on carburators. The
boat weights 17000 lbs. It is my understanding I need foot lbs. of
torque more than rpm. Anyone know if there is a guide or book? Anyone
with information. Thanks in advance.

I'm not really sure, but one thing I'd like to know, is why would you
want to replace teh Chryslers with the chevys?

Not saying one brand is superior to the other, but your mounting and
manifolds and trans bolt patterns are completely different,a nd I
would think that it would take a lot more work to change over the
engines instead of rebuild the 318's.

Are the 318's the old "Big Blocks"? if so, they are vertually the
same blocks as the the 383's, 413,s qand 440's, which would be easier
to overhaul and get the horsepower/torque you're looking for.

If the 318's are the later "small block" versions, they are the same a
block as the 360 and late 60's 274, and you might be strained on
getting the results you desire.

Interesting - not that I don't believe you, but as far as I knew,
MOPAR never built a big block 318.

Then again, I'm not all that up on MOPAR stuff unless it involves the
440.- Hide quoted text -

- Show quoted text -

http://www.sweptline.com/tech/engines.html

Tom, Richard and everybody else. I DO STAND CORRECTED! The early 318
"A" was NOT clasified as a "Big Block" but rather a Polysphere (or
Wideblock) 318. Obviously not the same as the 318 "LA" which was
classed as a true "small block" but not the large 383-440 Big Block
either, even though it did have heavier castings and big block
"characteristics". But I'm still not sure if the 413 is in between
the 383-440's or if it was an over punched wide block 318.

Again I Humbly apologize.

You learn something everyday.

No reason to apologize - all those different engines of the day were
simply amazing.

There aren't very many "classic" engines, but certainly the 318 stands
alone as the best engine ever developed. I might rank the 220 slant
six as one and the 220 Silver Diamond International six as another.

Also considered - 327, 350 and the great 564 International/Ford truck
engine along with the 7.3 liter diesel.

"Short Wave Sportfishing" wrote in message
...
On Sat, 03 Nov 2007 13:45:43 -0700, Tim wrote:


Eisboch wrote:
"Tim" wrote in message
ups.com...


Are the 318's the old "Big Blocks"? if so, they are vertually the
same blocks as the the 383's, 413,s qand 440's, which would be easier
to overhaul and get the horsepower/torque you're looking for.



The MoPar 318 came in a big block version?

Never knew that.

Eisboch

Yes, Richard.

As a matter of fact, they did. There was the 60's 318 "A" block, up
intill I think about 1967 or '68, then chrylser happened to come out
with the 318 "LA" in a small block version. Wich was essentially in
the family of the 273(?) 340, 360

That;s like in the 60's, Pontiac had a 326 and the 389, and 428 had
the same block same block

Um - again, I'm not up on MOPAR stuff so I looked around a little and
it confirmed what I do know. The "A" block that produced the 318 was
the late '50s 303 block which, if I remember correctly, was small
block.

Yes/no?

That's what I always thought. The original 318 "A" engine came out in 1956
or '57 and I am quite sure it was a small block. The "LA" version of the
318 was also a small block. The 318 and 360 were essential the same engine
blocks with different heads.

I would be very surprised if there was a 318 that shared the same block as
the 440.

Eisboch

"Short Wave Sportfishing" wrote in message
...
On Sat, 3 Nov 2007 13:06:48 -0500, "Eisboch"
wrote:


"Tim" wrote in message
roups.com...


Are the 318's the old "Big Blocks"? if so, they are vertually the
same blocks as the the 383's, 413,s qand 440's, which would be easier
to overhaul and get the horsepower/torque you're looking for.

The MoPar 318 came in a big block version?

Never knew that.

As far as I know the 318 and 360 were always small block MOPAR
engines. The 318 could produce up to 350 hp and the 360 could produce
up to 450.

As I understood it, the base big block was the 383 which could produce
525 horsepower with the 400 and 440 built off the 383 block.

Howver, as always, I am probably wrong.


You're corrent.

Eisboch

"Short Wave Sportfishing" wrote in message
...


There aren't very many "classic" engines, but certainly the 318 stands
alone as the best engine ever developed. I might rank the 220 slant
six as one and the 220 Silver Diamond International six as another.

Also considered - 327, 350 and the great 564 International/Ford truck
engine along with the 7.3 liter diesel.


I'd thrown in Ford's 260/289/302 as well. The 289 powered many cars,
large and small.

Eisboch

On Sun, 4 Nov 2007 05:48:39 -0500, "Eisboch"
wrote:


"Short Wave Sportfishing" wrote in message
.. .


There aren't very many "classic" engines, but certainly the 318 stands
alone as the best engine ever developed. I might rank the 220 slant
six as one and the 220 Silver Diamond International six as another.

Also considered - 327, 350 and the great 564 International/Ford truck
engine along with the 7.3 liter diesel.

I'd thrown in Ford's 260/289/302 as well. The 289 powered many cars,
large and small.

Agreed.

On Nov 4, 5:08 am, Short Wave Sportfishing wrote:
On Sun, 4 Nov 2007 05:48:39 -0500, "Eisboch"
wrote:



"Short Wave Sportfishing" wrote in message
.. .

There aren't very many "classic" engines, but certainly the 318 stands
alone as the best engine ever developed. I might rank the 220 slant
six as one and the 220 Silver Diamond International six as another.

Also considered - 327, 350 and the great 564 International/Ford truck
engine along with the 7.3 liter diesel.

I'd thrown in Ford's 260/289/302 as well. The 289 powered many cars,
large and small.

Agreed.

the 390 wasn't bad either. the 351 Cleveland was a good all around
performance engine, and tthe 351 Windsor wasnt' that hot but was a
fairly reliable workhorse.


hmmm, two completely different 351's

On Sun, 4 Nov 2007 05:48:39 -0500, "Eisboch"
wrote:


"Short Wave Sportfishing" wrote in message
.. .


There aren't very many "classic" engines, but certainly the 318 stands
alone as the best engine ever developed. I might rank the 220 slant
six as one and the 220 Silver Diamond International six as another.

Also considered - 327, 350 and the great 564 International/Ford truck
engine along with the 7.3 liter diesel.


I'd thrown in Ford's 260/289/302 as well. The 289 powered many cars,
large and small.

For numbers powered the GM 2.8/3.1 might be there.
I saw a car magazine (Car & Driver?) article about a year ago that
was titled something like "the top 10 engines of all time."
I remember the GM 3800 (maybe 3.8) and the Nissan 3.0 were 2 of them,
but can't remember much else.
I've put most of my miles on 2.8/3.1's, with 350's next.

--Vic

On Nov 3, 1:27 pm, Wayne.B wrote:
On Sat, 03 Nov 2007 10:57:15 -0700, wrote:
I have a 32' Luhrs Sportfisher. Currently with Chrysler 318 engines.
I have 2 Chevrolet 350 4 bolt marine engines, one standard, one
reverse rotation. I would like to find out what spec. and what parts
I need to build these engines to 280 to 300 hp on carburators. The
boat weights 17000 lbs. It is my understanding I need foot lbs. of
torque more than rpm. Anyone know if there is a guide or book? Anyone
with information. Thanks in advance.

The most I've seen from a carburated 350 is 260 hp. You can get 300
to 320 with multi-port fuel injection, maybe more. With 17,000 lbs of
weight you'll be a lot better off with 454s or even bigger. My old
Bertram 33 weighed 21,000 and it was only a marginal performer with
350 hp 454s.

I had 350's with carbs and 300 hp, it's not difficult. A better choice
is to make those 350's into 383's, plenty of torque at low RPM's and
still light weight. Even better, if you can find them, small block
400's. But to do any of this you need a good engine shop that knows
marine engines. Their's so many choices of heads, valve sizes, cam
shafts.

About five years ago I had a shop I've been dealing with for years
build me 300 hp 350's, completely remachined, new sheet metal, pistons
rings cams, bearings timing gears and chain, oil pumps, ect. Bottom
line, $2500 each, I'd probably bet their about $3000 each now. The
best thing about 350's are the parts are cheap!!!

On Mon, 05 Nov 2007 09:26:15 -0800, Capt John
wrote:

About five years ago I had a shop I've been dealing with for years
build me 300 hp 350's, completely remachined, new sheet metal, pistons
rings cams, bearings timing gears and chain, oil pumps, ect.

I'm sure there are people who can get that kind of power but it can't
be easy or durability/operability is compromised in some way. If it
was easy Mercruiser would be doing it and they're not.
One of the challenges is maintaining low end torque while you hop up
the high end. Another issue is what happens to durability if you have
to run at 5000 RPM to get the 300 hp.

I have a 6.2L MPI (about 373 cid) that Mercruiser rates at 320 hp, so
300 hp out of a carburated 350 is a bit of a stretch.