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  1. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    True, I thought you were referring to the KB 9912HC Piston. So what part number would you suggest, considering the availability of a high octane fuel?
  2. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    How is this piston D-shaped? From the picture it looks round, except the two reliefs. I would go for the remanufactured block, since it´s 1100 USD cheaper than a new one. Side story: he explained to me that the higher prices for the blocks this year come from a regulation that forced GM to...
  3. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    I had a long conversatoin with Tim from Center State Marine Engines and he says for this engine http://marineengines4less.com/marine-engines/remanufactured-marine-engines/remanufactured-6.2l-vortec-stroker-marine-extended-base-engine-with-intake-replaces-years-1996-present/ they use Keith...
  4. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Are there any reasonable priced offers on the market, where you can get a proper build stroker then?
  5. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    I´ve asked the Center State Marine Engines guys, if they´re willing to share what exact parts they use to build the engine, but this is all I got out from them "We use a Mercruiser 383 camshaft in the stroker engine, a SCAT crankshaft and connecting rods, and Sealed Pro pistons."
  6. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Thanks for the encouraging words and I do not mean the rectal-cranial inversion part of it. I feel good here and you seem to know what you´re doing from your own experience, not from "I heard a rumor..." What do you think about these two: refurbished...
  7. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    That sounds reasonable. I´ll just put it back where I found it. Regarding me engine swap. After profound youtubing (I recommend this guy ) I do not feel confident any more to assemble a strokered SBC (not even a normal one!) any more. I need a completed long block at least, ideally including...
  8. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    The drive is removed and the engine moves. Didn´t pull too far, since I will have to get the crane first. There is a thing that´s supposed to prevent water getting in the exhaust, but it was totally bent and the parts don´t move. Also the steering arm was not fixed on the helm-thing, so the helm...
  9. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    So, aside from the lag bolts, the engine bolts connecting it wiht the boat are only accessible from the outside of the boat?
  10. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Found this tutorial, will follow that: Can you elborate on this one? - where are the 6 PDS bolts and what is a PDS? - where is the clamp ring located? - front mount lag bolts are where the engine is mounted to the floor, correct? I have the boat on a trailer already
  11. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Removed the second head today. My engine bay has the size of an average Manhattan midtown appartment (2-bedroom), so I can access everything very easily. On the first piston was a lot of coal (?), after spraying it with WD40 it coud be scratched off with the finger tip. The other ones were...
  12. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    I kind have arrived exactly there on my emotional roller coaster ride regarding the decision. I think I want this boat running again asap for reasonable costs. And when this is settled, I might take my old engine and build a stroker out of that. If I blow it, it will be financially ugly, but I...
  13. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    And is my block one wiht 4-bolts on the crankshaft or just 2? I haven´t disassembled it so far yet. Just looked at the volvo penta replacement parts site - This looks like it only has the two bolt thingy.
  14. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    I might need to reuse my block, to avoid the permit to put the boat on some waters being revoked. Is there a way to test my block? Whatever cooling hose I took off, red-ish water came out and a lot of sand, rust or whatever that was. How would I figure out, if it´s trash or not?
  15. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    just out of curiosity and to learn something new, I would love to build it myself! I would need some help to build a solid shopping list and someone virtually holding my sweaty hand while doing it. I have some guys here who are generally familiar with the hardware, but everything what is beside...
  16. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    so you think, there will be a big price difference between a 5.7 Vortec long block and a stroker long block? Michigan Motors offers a Vortec long block with the #906 heads on them. My googled superficial knowledge tells me, the 906 heads are less performant compared to #062, due to a modiefied...
  17. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    So I can not just replace the head to the vortec, also the cam shaft needs to be replaced to properly control the valves? IF I change heads and cam, the vortec heads seem to have different bolting. Mine has 6 bolts per side, the vortecs don´t have the middle ones. So I need a different...
  18. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Just to share my misery, see attached some pics from the disassembly. My favorite picture is the cylinder with the deep crater in it, I call it "sports stripes". Compared to the tinkering with my audi this engine feels a bit more like lego bricks, a tad less complex. So I hope I won´t get get...
  19. bollerwagon

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Ahoy! I have managed to toast my Volvo Penta AQ271 within 4 months after purchasing it* and need some advice for a resonable replacement. Since I found frost cracks in the exhaust manifold and it was sea water cooled for 30 years, I would not like to reuse the block, so at least I need a long...
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