Blue242

Hello, I'm a new member, and am curious about the most powerful engine one has ever put into a 242 LS? I have seen some posts with 540's with 535HP, but has anyone ever put in say a 588 with 700HP or a blown 588 with say 900/1000HP? If so, what other mods have been done to the boat (Drives and srivetrain)..

Has anyone run Arnesons on a 242 LS? ASD6 or ASD8...?

I am trying to get as much info as I can, because I would like to get this done properly. I have a 588 in my garage, and plan on installing it soon. It should have a conservative 675HP, as the cam is mild, and the compression is 9:1

Will I need a new engine harness, or can I use the one from the 454 mag?

Why am i doing this? Well, i need another hole in my head.. No, actually, my 454 mag blew a head gasket, and the heads may be cracked.. (Don't know for sure) I then found a great deal on this 588, and bought it thinking some more power would be nice.

I know I will need a better drive, and I think maybe an XR, or IMCO SC, or alternatively an Arneson ASD6 or 8 using the Bravo Conversion kit.. However, the drive replacement can wait one more season, as i do not abuse the boat, and unless the B1 breaks, I see no need right this minute. in addition, I am not Rockerfeller.

All help is appreciated. I have attached a pic of my boat, and the new engine.

Thanks,

Richard

88242LS

thats a good looking 242

masi242

Blue, did you buy this boat in the last year or so, good looking ride. What do you think for speed 75+.

twin242ls

there is a 242 ls in windham maine for sale with a blown big block not sure of the specs but my neighbor almost bought it. said it was 600++ maybe closer to 800 hp and the boat runs in the mid 80's on gps. but still has bennets and has blown them off in the past.

mopower

My buddy has a 509 @ 535 hp and gets 69.6 GPS with a labbed 24 B1
Here it is during the install and tested later in the day. Got towed home with a broke Bravo

BlackJack58

Keep us posted on what you end up doing...that is a fine looking 242. Mine has the same paint scheme, but with black hull sides and red striping. For now I'd like to get a few more horses out of the 454 I have in mine, but if I keep this boat a while I'd be looking to repower along those lines as well.

I don't know how much power or speed these hulls can ultimately handle--have you upgraded the trim tabs? Good steering rig also a must...

Blue242

Hi Everyone,

Thanks for the input. I have been chasing down some odd parts to get the motor complete and ready to drop in. My old motor is a Gen 4, so I have to get a bunch of new parts. Still looking for an oil pan, pickup, and pump. I was going to dry sump the motor, but decided to just go with a regular wet sump. I am also looking for a Gen 6 bell housing, internal balance flywheel, and HD drive coupler.

I am also in process of negotiating the purchase of an IMCO Extreme SC drive, as I do not want to get stuck out on the lake the first time out like "Mopower's" friend. In addition, the B1's seem to be only valid to 500 HP even XR's maybe to 575-600 HP. As my engine is closer to 700, I am thinking I have to do the drive now as well. I was not planning on this, but I guess stuff happens, and I now have an additional expense.

I eventually plan on external steering, or at least drive stabilizers, and an oil cooler for the drive. I was shocked that there is so little oil in hte drive to begin with.. Hell, a 75 HP Fiat has more gear lube in its diff..!

In addition, I want to dyno the motor to get a baseline, and tune the carb.. Still trying to decide on the Carb.. The motor has a 4150 intake that is match ported to the heads, and I have seen some carbs that flow 800-1000 CFM, but I think I may be able to get a deal on a 1050 Dominator, so I may have to get an adapter plate to use the 4500 series carb. More research to do....

I'll keep you guys posted with the progress. I should have some more in a week or two..

(Next time, I will just buy a new boat, it will be a hell of a lot easier than this!)

Richard

Blue242

Schweitz, (Kommen sie aus CH?)

I still have the Bennets, and plan to upgrade to K-Planes, or Dana tabs.. I actually bought a set ok used K-Planes from some Yutz in Florida, and got hosed. They are corroded, and the trim pumps were broken around the casing. So, there went a buch of cash down the drain. I actually paid through paypal, as it was on Ebay, but paypal is now deciding if I have a claim or not, so maybe I get my money back, or not.

Masi,

I bought the boat last year after a 242 SR1 got bought out from under me. I actually like the single, and the extra space in the hatch. I also like the blue color the best.

As far as speed, I have no idea, and will wait and see what the GPS says. It seems that with a Hydromotive Q4 25P, the boat might get to 75+. GPS will let me know, I just want to get the thing up, and running properly. The weather is getting warmer here, and in 1 month, I'll be late out on the lake..

Richard

Blue242

Almost forgot... I have a set of CMI E-Tops in the garage as well, waiting on the Header studs I ordered to put them on. I will use SCE copper gaskets, as they are reuseable. I'll post a pic of them mounted once I get them on.

R

mopower

In all fairness to plain old Bravos , my buddies was low on oil and the upper seized up , twisted the spline going into the coupler and had to cut the the shaft to pull the drive then the engine again to change the coupler