Oh snap. FNG bumps an older thread!
Looking for some discussion on this subject, actually. A TDI swap for the GVR4 pops into my head more often than it probably should, but if old school muscle cars are getting Powerstrokes, making 400-500 wheel, 1000lb-ft and actually getting 30mpg or better around town, I can see merit in our considering it for our cars.
(Obviously, in order to preserve the integrity of such rare vehicles as the GVR4, it would be best to experiment on a mongrel DSM.) /ubbthreads/images/graemlins/hsugh.gif
So, the last post in this thread before FNG, here, bumped it back up, mentions the Astron engines. Check out some basic numbers:
4D56 SOHC: 2.5L turbo diesel with 21:1CR, 128HP, 232lb-ft@2000rpm
4G63 DOHC: 2.0L turbo gas with 8.5:1CR, 210HP, 214lb-ft@3000rpm
The Astron makes about 10% more torque than the Sirius, but makes it a full 1000rpm sooner. It's a 2.5 vs. a 2.0, but assuming it would fit with a minimum of fabrication, I suspect the potential for tuning would not need to be as advanced as the current state of 4G63 affairs in order to achieve 400lbs-ft.
Just a thought. Might be interesting to do a swap on an otherwise beat-ass test mule to see what was possible. Who wants to wind out to 10,000rpm for a 1000hp dyno queen when they might be able to put the same amount of torque down on a street car that still gets 30mpg?
/tease:
click
/random