Recent content by 686SPORT

  1. 6

    V-P 5.7 Gxi intake on 383 stroker?

    My old racing buddy found this guy in Herndon, VA.\: https://www.maicsalazardiagnostics.com/ Anybody know anything about him? re: fitting BBC 8.1: assume there are adapters where needed to attach motor mounts and exhaust y-pipe. Can you use the sbc coupler and transom assembly? How about fuel...
  2. 6

    V-P 5.7 Gxi intake on 383 stroker?

    Back in the day we tuned race engines using exhaust gas temperature gauges and set up the MSD with a little retard at the top end. Never burned a piston, and if a rod let go it was at the big end from too many revs. Any way to get EGT reading from a marine exhaust stream? btw, I've had lots of...
  3. 6

    V-P 5.7 Gxi intake on 383 stroker?

    Yes, I know all about V-P systematic issues. Missed the 2023 season finding a mechanic who would take on the overheating issue on the 290 Chap with 5.0's; didn't get back on the water until late '24. Since the admiral is no longer here [accident, not her fault], I don't need a cruiser and could...
  4. 6

    V-P 5.7 Gxi intake on 383 stroker?

    As luck would have it, Gxi-G is the first V-P offering that doesn't use the 555 engine management system. Per Bob: "We do not deal with that E-controls Volvo EGC ecm at all, so I can not help you. See: http://mefiburn.com/ecmrepair.asp" A look at that link shows that all V-P's up through...
  5. 6

    V-P 5.7 Gxi intake on 383 stroker?

    Reached out to Michigan Motorz. Here is part of their reply: "At this time, we do not offer a 6.2L Volvo replacement." Near as I can tell, V-P never offered the 6.2 - at least in the years around 2005-6, which is when this Chap was built. Anyone know of an online resource that could help with...
  6. 6

    V-P 5.7 Gxi intake on 383 stroker?

    Mercruiser has made a 383 that comes complete with intake and ignition; this is the one with the flame graphics on the spark arrester [!]. There are reman versions of this engine for sale out there. Anyone know of a successful mating of this engine to a V-P leg and electronics? The 555...
  7. 6

    V-P 5.7 Gxi intake on 383 stroker?

    We bought a 265Ssi new at Centerville Waterway in VA. V-P 8.1/375. After break-in she hit 56 statute mph on the gps both ways running the canal there. Real-world cruise at 2900 rpm [the sweet spot, to my ears] returned a shade over 3 mpg. She would pop up two adult slalom skiers with ease, with...
  8. 6

    V-P 5.7 Gxi intake on 383 stroker?

    The tow vehicle for our first Chaparral had a 6.0 LQ4 that made amazing power and would sustain 5000 rpm for as long as you asked it. LQ/S swap is probably beyond my abilities and budget, though. Trying to keep things simple by staying within the same general engine family as the 5.7 GXI...
  9. 6

    V-P 5.7 Gxi intake on 383 stroker?

    Yeah, but I seem to recall reading somewhere that the ECM can be reprogrammed to work with the stroker. I'm not too keen on buying a new engine when there are already doubts that it can do the job. Guessing that the 350 is a bit less than ideal since you were looking into this same upgrade...
  10. 6

    5.0 OSi-JF overheating at speed

    Just to finish off this thread: the problem turned out to be a failed plastic nipple attached to the hose in the junction between outdrive and transom assembly. It's #9 in the enclosed diagram. Since the failed part was underwater before the boat came up on plane, the problem never really became...
  11. 6

    V-P 5.7 Gxi intake on 383 stroker?

    My marina just inherited a Chaparral 265Ssi with a trashed V-P 5.7 GXI-G over 1.95 DP with F4 props. I am interested in buying this boat, since we previously owned the same model with V-P 8.1. Real world weight estimated at 5600#. I feel that the regular 5.7 would be underpowered when skiing or...
  12. 6

    5.0 OSi-JF overheating at speed

    Yes, your boat has much better access as well as lighter components. Mine has a deck above, batteries and black water tank on the outsides, and the other engine on the inside. Very tight even with a 10' beam. I still have an old coffee can full of Datsun L-series head bolts left over from...
  13. 6

    5.0 OSi-JF overheating at speed

    No report from the Manatee off Highland Shores?
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