Grant Baker Posted December 13, 2019 Report Share Posted December 13, 2019 Hi Has anybody got any base maps or info on setup of an LS7 with VVT? Specifically the VVT setup... Doesn't seem to be a specific LSx VVT Control mode. The system seems to have a PWM control which varies Cam from 7 deg advance to 45 deg retard. Any other issues with stock injectors, coils or sensors on the LS motors? Thanks in advance Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 13, 2019 Report Share Posted December 13, 2019 LS7 is a hand built performance engine, dry sump etc, it only came in the Z06 corvette or as a crate engine, none of them had VVT as far as I know. What engine do you actually have? Maybe you have one of the "displacement on demand" truck engines? Can you attach a triggerscope. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted December 13, 2019 Author Report Share Posted December 13, 2019 It is a MAST Motorsports Engine. Fitted to a GD Cobra rep. We are swapping from the MAST ECU to a Thunder. Not started wiring it yet but noticed there is a VVT output on the MAST ECU Which seems to be wired. So I don't yet have trigger scopes. Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 14, 2019 Report Share Posted December 14, 2019 Ok, if it is an LS7 engine it will not have VVT, sounds like you need to have a closer look to confirm what you actually have. Obviously VVT is not common in a single cam engine as both intake and exhaust lobes will move together. Some of the LS based truck engines did have a form of VVT but I think that was only on the engines that had "displacement on demand" where some cylinders were disabled by holding the valves open during cruise conditions to make it more economical. Quote Link to comment Share on other sites More sharing options...
jonnyt80 Posted December 21, 2019 Report Share Posted December 21, 2019 The LT had a VVT pulley if I remember correctly Quote Link to comment Share on other sites More sharing options...
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