|
the lsx based motors are already extremely efficient from the factory. the ls1s do make great torque overall, just not compared to like a 350 tpi or LT1. The basis of the lsx architecture was to more or less improve emissions, and they did a wonderful job at fuel economy for a v8 too. They just took very high flowing high swirl heads, and smaller than normal camshafts. Thats why they can gain 50-60 hp JUST from cam swaps. LS1 f-bodies can get from 26-28 mpg average as they are. your best bet would really be to get lighter or more narrow tires and just have it dyno tuned. The dyno tuning usually does a great job for FE and top end as well. They run fairly rich from the factory. You just have a lot of mechanical parts and weight to push around with a giant engine, so your already not doing bad
|