Hey Precision, Keep me posted on that kit. I have a lot of experience on swapping wet joint exhaust to merc dry joint exhaust on regular SB chevy engines.. It a little more complicated than just bolting it on.. Not sure if it will translate to an LS or not but let me know if you are interested in the info.

[email protected]

Chris

Really, all that effort in molesting your checkmate and going with carbs ??? What a waste when Holley has one of the best, & easiest to set up FI systems for LS motors money can buy!!! Your already there do it right for cripes sake !!!

So your first post on OSO is coming in here to be a douche? I have an idea, when its your boat, you do what you want. As far as "molesting" my checkmate goes, there really isn't anything changed. I am wiring everything with a factory mercruiser plug, my headers exit at the stock location, and I only had to move my motor mounts slightly. If I feel like putting a stock Merc motor back in it, I can have it done in a weekend no problem. So until you know a little more about me and how "right or not right" I do ****, why don't you just go ahead and **** yourself.

For the rest of you with positive interest in my little project, here is a little teaser pic of the 408ci LS2 mocked up for bracket manufacturing. I'll post more as I get it done and get my dyno numbers in the next couple of weeks.

Only a 20yr old juvenile resorts to name calling when confronted with constructive criticism. Grow up kid open your ears and shut your mouth, you might learn something.
Great pix and choice of technology till you get to the very top of the motor. I guess if you boat in OH where the chance of vaporlock is minimal a carb is fine. But go south or experience a lot of high humidity youll be wishing for a FI system.

Can you give us info on your Water pump/crossover? I am not very knowledgeable of LS marine plumbing.

Chris

I think your use of the term 'molested' is what got Corey fired off...and deservedly so.

If he was a 20yr old and decided to use a carburetor I'd be even more impressed !

Too many 'kids', even those who know how to tune/install EFI, fall over dead when presented with a carburetor. Sounds weird, but that's happening all over.

If Corey331 is more comfortable with a carburetor, then that's his best choice.

Many of us here, work on and tune FI all the time, for work even, and yet some of us still use carburetors. Far from 20yrs old - and far from being stupid.

Corey - some of us like what you are doing. Carry on.

No problem. There is a much easier way to plumb the system if you don't mind spending $2000+ on the Hardin Marine setup. Being a Engineer/Fabricator by trade, I decided to find my own way. That way was made much simpler with some parts from Moroso. A big problem in the drag racing world with LS motors is the cost of an electric water pump for these motors. So Moroso decided to come up with an adapter set up to be able to bolt on a BBC pump. Well I figured "Why wouldn't that work for a BBC crossover?". Now, when you ditch the factory water pump on an LS, you also get rid of a thermostat. So Moroso also built a remote thermostat housing and a bracket that mounts it to the front of the cylinder head as you see in the pic. This also uses a BBC thermostat housing, so the crossover kit from Hardin Marine bolted right up to the motor. The only mods I am doing is I am going to drill and tap the bottom of the remote thermostat housing to accept a feed line from the steam crossover out of the heads. Normally that just goes back to the radiator. For a sea water pump I am using a brass Jabsco pump that will bolt directly to the crank pulley. It should work out great, and I have a whole lot less than $2k in everything.

The motor has actually changed a lot since those pics were taken. I got rid of that Demon carb for an AED prepped Holley HP 750, I added a nicer 3" K&N arrestor and I fabbed up brackets to relocate the coil packs to the back of the cylinder heads to keep the motor clean looking. i am currently milling up a bracket to keep the water pump housing from spinning, so once that's on in the next week or so, I'll update with new pics. I also got my alternator mounted and am using a heim joint tension-er to keep that belt tight. As far as power steering goes, I am doing some experimenting there. I'll post up what I did IF it works, which it should.

Thanks man. It's going to take more than one ass hat that joins a forum for no other reason than to bash on my project to change my plans. Whats funny is that everything I have ever built has been EFI. My last Mustang was injected with a FAST setup and as you can see in the background, now I'm playing with a 87 Buick GN that is EFI. It only runs 10's on street tires, so I must not know what I'm doing, or know how to do it "right". But, my boats have always been carb'd (been boating longer than he thinks I have been alive) and I can honestly say that I have never been stranded on the water due to a faulty carb. Now,I can say that I have towed in more than one boater that couldn't get his boat to start due to some damn sensor not reading or going bad. But oh well, good thing is, its my project and the last thing I'm concerned with is making somebody on the internet I don't know happy.

I guess somebody hasnt been around boats long enough to have heard of all mercs FI vapor lock horror stories...

Corey, we all know how well carbs don't work.. can't wait to see yours not work too!