Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Sign in to follow this  
SkiPablo

How much less does the LS1 engine weight ?

Recommended Posts

SkiPablo

Hi Guys,  buying a Sunsetter with LS1 - i was reading b/c it's aluminum head it is a lot lighter - does anything on the weights of the LS1 vs the Monsoon ?   I searched but didn't come up with anything.

thanks!

Share this post


Link to post
MalibuNation

I forget the numbers.  The block is aluminum too.  You will have a heat exchanger which will add some weight back.

Share this post


Link to post
Nitrousbird

I believe the EFI Indmar SBC-I's are all aluminum head/intake motors, so it is the difference in aluminum vs iron block & aluminum intake vs composite.  Figuring in the heat exchanger and additional fluid, my guess is 75lbs or less.  I highly doubt anyone has done a weight comparison on the marine versions of either.

Share this post


Link to post
boardjnky4
16 minutes ago, Nitrousbird said:

I believe the EFI Indmar SBC-I's are all aluminum head/intake motors, so it is the difference in aluminum vs iron block & aluminum intake vs composite.  Figuring in the heat exchanger and additional fluid, my guess is 75lbs or less.  I highly doubt anyone has done a weight comparison on the marine versions of either.

I'm pretty sure they are cast iron. If they were aluminum, then it would be ill-advised to run raw-water through them... From my understanding.

Share this post


Link to post
SkiPablo

ok 75 is not much - i thought it might be something like 200 lbs difference

Share this post


Link to post
jjackkrash
7 minutes ago, boardjnky4 said:

I'm pretty sure they are cast iron. If they were aluminum, then it would be ill-advised to run raw-water through them... From my understanding.

IIRC, mixed-metal engines require closed cooling to prevent galvanic corrosion, but all-aluminum works fine with raw-water cooling unless you are running in salt.

https://www.westmarine.com/WestAdvisor/Preventing-Galvanic-Corrosion

Share this post


Link to post
SkiPablo

these LS1's are closed cooling

Edited by SkiPablo

Share this post


Link to post
MalibuNation

IIRC all of the LS1s are closed cooling.

Share this post


Link to post
TenTwentyOne

Lots of aluminum engines out there running open cooling without issue.....

As for the weight difference of the blocks, it isn't really much. An all aluminum sbc is about 100lbs less than an all iron SBC. That said, the other engine offerings in Bu's, at that time, had aluminum heads. With that being the case, the aluminum block is only saving about 50lbs or so.

Edited by TenTwentyOne

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...