Wodster69

I'm wanting to change to a closed cooling system. And i have a few questions. This is going on 98 353 fastech w twin 502 mags.
First - How hard is the install and what all needs to be cleaned or replaced?
The engines are out right now and will be vatted and cleaned.

Second What kind advantages or disadvantages of having the system.

Third Who has the kits and offer the best prices?

Im also thinnking of converting to 525s I believe all i need is edelbrock heads, cam, intakes and acc. comp

If any dealers are on here and would like to qoute me prices My email is
[email protected]
For CLosed cooling kit, Edelbrock heads, Cam,
Exhaust Im thinking cmi e tops And anything else Im going to need.

Thanks
David

offthefront

iTrader: (1)

Contact "mrhorsepower1" (Dean Gellner) ... or

"rmbuilder" ..... (Bob Madara)

Both ....... top of the class .....m

DMOORE

Are you boating in salt or fresh water? If your not boating in salt, retrofiting a closed cooling system would be a waste of money. As for up grading the motors, there are lots of better heads out there than the Edelbrock. Check out the AFR, or Brodix heads. Not sure of price difference.


Darrell.

Wodster69

its going to be used in saltwater.

Thanks
David

madbouyz

No , no no ....

What he meant was has the boat already been used in salt water for any length of time before you put on the freshwater kits ? ?

I know from experience that the factory kit on the 502 MPI
works very well even with sea water temps of 80f but for some stupid reason Merc saw fit to NOT equip them with zinc pencil anodes like Volvo does ....

Wodster69

OH yes they have been in saltwater since new i guess but have low hrs, not much scaling in the water jackets from what i can see.
Thanks

madbouyz

AHA !

Now that might change things a bit ... Generally speaking , most folks say that after " X " amount of time with prior running in salt it does'nt make any sense to go to FWC.
Partially due to salt damage (scaling) already in progress and salt having permeated the cast iron.

Whatever you do though , remember that your most vulnerable engine parts are the exhaust manifolds. Even with a 'full' FWC system the risers are still in salt all the time and between them and the exhaust manifolds you're only going to get so many years out of them , regardless of how good they look on the exterior.

two-rocks

Raw water cooled blocks are often not worth rebuilding.

Mine was scrap, heads too. The new engine will be full FWC.

cuda

Closed cooling make the engines very hard to work on, and in my opinion, not worth the trouble, or expense. I had s small block Donzi, that I put CC on. I have more room in the bilge of my big block Donzi without CC, than I did in the SBC. But what do I know. My engines in the Formula only lasted 22 years, and still going strong, with raw water cooling, and were still going strong, when I sold the boat in December. Just a few months before that, I pulled the thermostats to check for corrosion, because right there is where it usually starts. Not a sign of corrosion. Fanatical flushing is the key.