HELP! Alpha supercharged SS with too rich fuel mixture

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    • MACAWS wrote:

      Yes all the stock blocks are foam cast
      I have switched over to the DDM gen 3
      Yes all the stock blocks are foam cast

      MACAWS wrote:

      I have switched over to the DDM gen 3
      When I posted the question I was referring to what vehicle manufacture put the gen 3 blocks in what vehicle in which years. It would be good information to have to go junkyard huntin for a new project engine.
      Tim "Ghost" Ganey
      Winfield, Alabama
      205spam412spam2868
    • HELP! Alpha supercharged SS with too rich fuel mixture

      All of our engines are gen 3 that we build . We don’t even encourage the reuse of Slingshot block and also we are up to 23 slingshots converted to haltech and now with the introduction of the K24 Honda swap . We can make more horsepower for less and dyno video soon to be released . It’s amazing what a Honda Civic motor can do .


      Sent from my iPhone using Polaris Slingshot Info
    • Way to go @Jdin & @TheRock!!! THAT is what it’s all about. The amount of knowledge here & the willingness to help each other out is mind boggling. Even people that no longer Sling or are here gathering info in hopes of getting one someday are all accepted as family. Have NEVER seen a group of people like we have here. AWESOME!!! :thumbup:

      Carry on...
      Slingshots: making children out of adults since 2014
    • ethermion wrote:

      ??? If you notice, somebody with a sharpie wrote BAD. Not encouraging.
      That block is one that had the internal cracking on it. Since we get a lot of engines coming in and out here for builds, when we pull and engine that is cracked internally we write on it as soon as we can that it is bad, otherwise there is no visual way to determine that it has cracking internally.

      Ghost wrote:

      What was the year models and applications for the engines with the sand cast blocks? (Which brand, model, and year)

      I definitely want to go ahead and pick one up to start on for when my current engine bites the dust.

      Also it would be helpful if someone with the knowledge and experience of these engines could advise how much they can safely be bored and or stroked and still remain a dependable daily driver with the SC installed. There is no replacement for displacement!

      Inquiring minds would like to know! LOL
      The LEA/LAF block is what you are looking for. Both of those engines are DI (Direct injection) so the cylinder head will not be compatible with the Slingshot. You will have to swap back to a LE5/LE9 cylinder head. Also, the LEA/LAF is a higher compression engine from the factory (11.2:1 compression), just want to make sure that no one goes out and just tries to swap in the block without realizing that. The LEA/LAF block also does not have any of the oil supply ports on the passenger side of the engine like the LE5/LE9 engine, so if you have a turbo, you will have to find an alternate oil supply for the turbo. The LDK block does have a oil port on the passenger side of the engine, but that is a 2.0L engine and will have to be bored over heavily to get to the 2.4L bore, also that block has an oil cooler that has to be removed to fit in the Slingshot and also some other machine work is needed.

      LEA/LAF year models from GM -

      LAF-
      2010–2011Chevrolet Equinox
      GMC Terrain
      182 hp (136 kW) @ 6700 rpm (gasoline)172 ft⋅lb (233 N⋅m) @ 4900 rpm (gasoline)
      2010–2011Buick LaCrosse182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm
      2011Buick Regal182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm
      2011–2014Chevrolet Orlando174 hp (130 kW) @ 6700 rpm171 ft⋅lb (232 N⋅m) @ 4900 rpm
      2011Chevrolet Captiva182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm



      LEA-
      2012–2013, 2015–2017Buick Regal182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink
      2012–2017Buick Verano[13]180 hp (134 kW) @ 6700 rpm171 ft⋅lb (232 N⋅m) @ 4900 rpmlink
      2012–presentChevrolet Captiva Sport182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink
      2012–2017Chevrolet Equinox
      GMC Terrain
      182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink



      As for boring and stroking - The stock bore on the 2.4L is 88mm, we typically go up to 88.5mm on the engine builds we do. I really can not recommend going more than that. The stroke is going to be limited by the cranks available from GM engines.

      We ran the 100mm pulley at the track day and have beat on the poor junkyard engine in our Slingshot with that setup for a long time with no issues. As long as you keep the oil changed and maintain that engine, it should go for quite a while without having any issues with our supercharger kit. We have been supercharging that same engine since 2007 and have a lot of Solstice/Sky customers on stock supercharged engines that have gone well over 100,000 miles now without an issue.

      Hope that helps,
      Dave
    • Dave@DDMWorks wrote:

      That block is one that had the internal cracking on it. Since we get a lot of engines coming in and out here for builds, when we pull and engine that is cracked internally we write on it as soon as we can that it is bad, otherwise there is no visual way to determine that it has cracking internally.The LEA/LAF block is what you are looking for. Both of those engines are DI (Direct injection) so the cylinder head will not be compatible with the Slingshot. You will have to swap back to a LE5/LE9 cylinder head. Also, the LEA/LAF is a higher compression engine from the factory (11.2:1 compression), just want to make sure that no one goes out and just tries to swap in the block without realizing that. The LEA/LAF block also does not have any of the oil supply ports on the passenger side of the engine like the LE5/LE9 engine, so if you have a turbo, you will have to find an alternate oil supply for the turbo. The LDK block does have a oil port on the passenger side of the engine, but that is a 2.0L engine and will have to be bored over heavily to get to the 2.4L bore, also that block has an oil cooler that has to be removed to fit in the Slingshot and also some other machine work is needed.
      LEA/LAF year models from GM -

      LAF-
      2010–2011Chevrolet EquinoxGMC Terrain
      182 hp (136 kW) @ 6700 rpm (gasoline)172 ft⋅lb (233 N⋅m) @ 4900 rpm (gasoline)
      2010–2011Buick LaCrosse182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm
      2011Buick Regal182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm
      2011–2014Chevrolet Orlando174 hp (130 kW) @ 6700 rpm171 ft⋅lb (232 N⋅m) @ 4900 rpm
      2011Chevrolet Captiva182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpm


      LEA-
      2012–2013, 2015–2017Buick Regal182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink
      2012–2017Buick Verano[13]180 hp (134 kW) @ 6700 rpm171 ft⋅lb (232 N⋅m) @ 4900 rpmlink
      2012–presentChevrolet Captiva Sport182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink
      2012–2017Chevrolet EquinoxGMC Terrain
      182 hp (136 kW) @ 6700 rpm172 ft⋅lb (233 N⋅m) @ 4900 rpmlink


      As for boring and stroking - The stock bore on the 2.4L is 88mm, we typically go up to 88.5mm on the engine builds we do. I really can not recommend going more than that. The stroke is going to be limited by the cranks available from GM engines.

      We ran the 100mm pulley at the track day and have beat on the poor junkyard engine in our Slingshot with that setup for a long time with no issues. As long as you keep the oil changed and maintain that engine, it should go for quite a while without having any issues with our supercharger kit. We have been supercharging that same engine since 2007 and have a lot of Solstice/Sky customers on stock supercharged engines that have gone well over 100,000 miles now without an issue.

      Hope that helps,
      Dave


      Thanks a million Dave!

      That is EXACTLY the information that I was looking for.

      BTW: I believe I have figured out why I am seeing the out of the ball park boost readings from the gage. It has to do with where I am getting the boost signal. When I have it revved up and jump out of the throttle closing the throttle plate the pressure spikes because of the area involved or the lack there of. If I were to get my signal/pressure from below the throttle plate I bet it wouldn't do that. Bottom line, I do not believe that the engine is ever seeing anything above 12psi.

      Thanks again Dave for the information and for all you do for our SS family!
      Tim "Ghost" Ganey
      Winfield, Alabama
      205spam412spam2868
    • HELP! Alpha supercharged SS with too rich fuel mixture

      This is why I have an LEA block being built by DDMWorks right now. The next time anyone sees the white beast it will have a new LEA based engine and an even larger Borg Warner ball bearing EFR turbo.

      Crap.... I have said to much now. I must remain quiet. Secret plan must stay a secret! :D :D :)
    • Tripod wrote:

      Way to go @Jdin & @TheRock!!! THAT is what it’s all about. The amount of knowledge here & the willingness to help each other out is mind boggling. Even people that no longer Sling or are here gathering info in hopes of getting one someday are all accepted as family. Have NEVER seen a group of people like we have here. AWESOME!!! :thumbup:

      Carry on...
      :thumbsup: :thumbsup:

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