This isn't really marine related but I thought some of you might be interested
in seeing what is possible with turbos, now that there seems to be a little bit more
happening with them. We dyno'd a twin turbo small block at
Tom Earharts over the weekend which turned out pretty well. The entire
motor, including hand built exhaust headers and intake plumbing, was built
by students at Pinckney High School, in Pinckney, MI.

The motor is a 357 cid Chevy with two 60mm turbos and a very mild
236/[email protected]" Cam, and 8.5:1 compression. We dyno'd the motor naturally
aspirated first, and then put the turbos on and dyno'd with boost. The
results were pretty astounding. 348HP naturally aspirated, 563 with 10psi
boost, and 931HP with 25psi. Given more tuning time and better
air(oil and exhaust leaks contaminated the intake air) it would have no doubt
made 1000 horse.

I've posted all three dyno sheets, and a couple of videos, one 770 raw ft-lb@3000rpm
and one at 830 raw ft-lb@5500 rpm. Make sure to watch the torque scale.

Thanks to Tom Earhart for all the dyno time, Bill Reifer(check300) for reading
gauges and donating some race fuel, and John at Pole Barn Engines for
boring and honing the block.

http://www.youtube.com/watch?v=fhOiWL4_qmc
http://www.youtube.com/watch?v=-dlSfSgWACE

Do you have a knock sensor? That is some big psi at 25 and really pushing some fuel. Carburated? Great project for the students and they did a great job.

Wannabe

nicely done! I lived in Hamburg for about 12 years before I moved to Florida - great to see some HP being built back in Pinkney - too bad I never had that class offered when I went to school.

Looks like the Students did a great Job,.....can only imagine what the future will continue to bring.


Jon

I grew up off of strawberry lake road, hamburg is small, pinckney and dexter schools never had anything like this before.

Looks like it had a Classic FAST EFI judging from the software on the laptop shown

INo knock sensor, just good fuel and not going crazy with the timing. It is fuel injected which helps a lot. The motor was put together with really good parts, and the assembly was supervised so it should hold up to a lot of abuse.

My buddy teaches the auto shop class, and him and I have always been turbo fans, and horsepower fans in general. It's just nice to see some of the next generation as excited as we are, and who are willing to put in the extra time to accomplish this.

Close. It's a Speed Pro ecu which uses the classic FAST software.