I don't know about that particular Miata, but I found a guy who put an LS6 into one (405hp/400lb-ft of torque ), and, according to him, the conversion only added ~215lbs to the car total, and the car still weighs less than the new Miata. 100lbs was added up front from the new engine and transmission, and 115lbs was added in the rear from the new rear drivetrain, so it still has a 50/50 weight distribution.pdanev said:^ I dont know how well it is in corners now, but that huge engine sure puts a lot of weight on the front.
Well, like 'LS2 V8 Miata' noted, the relatively lightweight of the LS powerplant, coupled with the heavier-than-stock Cobra IRS maintained the Miata's excellent weight distribution. I think that with suitable suspension upgrades, along with the drastic drivetrain changes, the car would undoubtedly be more fun than a stock Miata.I don't know half the fun of the Miata is the amazing turn-in and nimbleness. I think shoving a big V8 so far up would just spoil the whole car.