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.

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.

Just curious.

"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

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

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?

"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

On Sat, 3 Nov 2007 13:06:48 -0500, "Eisboch"
wrote:


"Tim" wrote in message
oups.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.

"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

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.

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