We've been working on this one for a while, sorting out a very clean install requiring minimal modification to the car. I'm extremely happy with the results and it's nealy impossible to wipe the grin from your face after driving this car.
2005 Elise body/chassis, minimal mods, minor weight reduction
2010 Evora 3.5L V6
MWR cold air intake
MWR long tube stainless headers
MWR stainless v-band dual exhaust
Magnaflow x-pipe muffler
E153 5-speed transmission with LSD (good for 700+ hp)
Final weight: 1980 lbs (38%F/62%R)
Dyno results, all tested on our Dynapack dyno:
Stock NA Elise: 159whp / 115wtq
Exige S240 supercharged: 212whp / 154 wtq
MWR Elise V330: 286whp / 275 wtq
That's approximately 330hp and 320 ft-lb!
We did not need to drill even a single hole in the car's chassis/frame. 100% bolt-in. The rear clam's trunk area is modified a bit to clear the rear cylinder head but most of the trunk is maintained. Suspension geometry and function are unaffected. Note: previous owner of this car modified the fiberglass behind the doors - this is NOT necessary for this engine swap. The previous owner had also removed some parts such as the stock oil coolers and the air conditioning but all other street equipment and full interior remains. Weight of an unmodified Elise with this swap would still be under 2100 lbs. That is LESS than a supercharged car with the E153 trans conversion. Not bad.
Trunk is only 90% finished. We're working on a custom engine lid right now. The intake manifold sticks up a little too high for the stock Elise lid. Exige lid should fit no problem. Don't worry about high CG, that whole manifold is plastic and only weighs a couple of pounds. Lower and lighter than the factory intercoolers.
Driving impressions: Incredible. Just look at that torque curve. If you're cruising at 2000 rpm and stomp the pedal you GO. No more waiting. No more downshifting. I love the smoothness of the NA power delivery and the "right now" throttle response. It's completely unlike any other Elise/Exige I've driven. Some turbo cars are faster but none have this sort of drivability. Weight is identical to stock so handling and balance are completely unchanged. I cannot wait to get this car to the track. Oh, and on the street, it'll get significantly better fuel economy than even the NA 1.8L. Will report numbers back soon.
This is the first Elise/Exige V6 we've done but there will be many more to come. We're evaluating costs so we can hang a price tag on the swap. I think it'll be a very popular option. The V6 has proven very reliable, performs incredibly, and brings with it the bulletproof E153 transmission. Win-win-win.
Future plans: we've already considered supercharging and turbocharging for an absurdly fast track car. We're also months in to developing an all-out NA V6 with more displacement and modified heads and valvetrain. No numbers yet but we're expecting to see 400hp+. For now we're going to fine tune what we've got and rev it a bit higher in hopes of hitting 350hp on the stock V6 NA. All icing on the cake since it's already awfully fast.
Special thanks to Marc @ FMS. Excellent source of information and all around great human being.