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  1. R

    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Re: Rebuilding a 1998 Mercruiser 4.3L Need advice please. Reached Bob, and I have put a first-time best guess fuel and ignition map in. I can't say enough about how much better this engine runs compared to the stocker, it's an absolute blast to drive!! It idles at 600 rpm, with the very...
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    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Re: Rebuilding a 1998 Mercruiser 4.3L Need advice please. Quick update. The engine is being put together over the next week. Piston to head clearance is .030, ring end-gaps are .014 first and .020 second. Piston to wall is .001, but should quickly become .0016 after some of the wear...
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    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Re: Rebuilding a 1998 Mercruiser 4.3L Need advice please. Knowing that the point of highest combustion pressure for most piston engines should occur around 15 degrees ATDC for best power/economy, and the flame continues to burn at the farther reaches from the plug till some time after that, I...
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    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Re: Rebuilding a 1998 Mercruiser 4.3L Need advice please. Just wanted to post an update on my "V8 power with V6 weight and V7 fuel burn" engine build. Block is bored and honed, I am bringing it home to do the measurements to set the deck height tomorrow. I have run hundreds of simulations...
  5. R

    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Re: Rebuilding a 1998 Mercruiser 4.3L Need advice please. See the two head bolt holes, go straight up to the water passage. That web in the passage has the crack, but I didn't know it at the time so I didn't scrape off the remnants of the head gasket and you can't see it. When I go back...
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    Rebuilding a 1998 Mercruiser 4.3L Need advice please.

    Well, this is only to start. I'm looking to up the horsepower on my general purpose (cruising and water skiing) Regal 2100LSR to 260-270 through 10.75:1 compression, a Edelbrock 1409 carb, and a mild Comp cam and I was wondering a few things. I wouldn't mind taking a little weight out of the...
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