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Brag box spotted in Columbus airport. 1.5L 16v DOHC, 16psi, 174 hp at the crank. Congratulation Honda, you just invented the B6 circa 1990 (with some help from MT.net).
Seriously, how is this motor making that little power at 16psi? Is it just strangled with emissions requirements?
Probably a tiny turbo built to be emissions compliant and get 30+mpg.
"Exhaust-port passages cast directly into cylinder head (eliminating separate exhaust manifold)" how many other manufactures do this?
Probably a tiny turbo built to be emissions compliant and get 30+mpg.
"Exhaust-port passages cast directly into cylinder head (eliminating separate exhaust manifold)" how many other manufactures do this?
umm most/all? I think this has been established as the way to go.
Probably.makes 16.5psi at like 3k and then runs out of puff at 5k. Curious what the torque curve looks like. Most of these new tiny turbo engines I have seen make everything down low and then no HP up top.
Probably.makes 16.5psi at like 3k and then runs out of puff at 5k. Curious what the torque curve looks like. Most of these new tiny turbo engines I have seen make everything down low and then no HP up top.
Probably more like 16.5psi at 1500rpm. The vast majority of people want torque and midrange, thats what makes for a good street engine.
Driving a car that is gutless below 5k and makes it all up top is ANNOYING to drive on the street. Hence my BRZ is now gone and replace with a turbo 6 that makes max twist from 1400-5400 RPM.......but doesn't completely die on the way to the 7k redline.
Yup! I have been loving my M45 just for this reason. 2k, put foot down, 5psi and off we go. It doesn't make any more than that though....
I switched over from my M45 to a T3/T4 churbo on my 1.6L this fall. I’m making 5psi by 2500 rpm, and 12psi by 3500 rpm. IAT’s never get more than 20 degrees over ambient. Needless to say I’m pretty happy with the switch.
For the last couple of years Lexus has been going over to 2.0L turbo engines for the smaller cars and base models. I recently got a chance to look at some datalogs of how they run. Theyre hitting full boost below 2k rpm and holding it out to ~5k before it starts tapering off. Whats really crazy is that its running stoich in boost up to around 5k rpm before richening up a bit. Were talking roughly 20 psi of boost at 14.7:1 AFR.
EDIT:
Here is a dyno of a stock IS200t vs an ECU flash someone has developed to make it push more boost
If Honda’s claim of 16.7psi stock is to be believed, then the Hondata tune is running 25+ psi to get those power figures. Makes you wonder what upgrading to a bigger turbo would do.
For the last couple of years Lexus has been going over to 2.0L turbo engines for the smaller cars and base models. I recently got a chance to look at some datalogs of how they run. Theyre hitting full boost below 2k rpm and holding it out to ~5k before it starts tapering off. Whats really crazy is that its running stoich in boost up to around 5k rpm before richening up a bit. Were talking roughly 20 psi of boost at 14.7:1 AFR.
... with a tiny hair-dryer turbo, and AFAIK not intercooled. Wow.
02-07-2018, 09:42 AM
Honda Earth Dreams turbo motor
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