there is definately gains to be had from a tune. The stock ECU works well in japan. low altitude and on high octane fuel. Way up in the clouds in colorado the tune will be off for sure. Im not sue what fuel you guys have over there either....
I don't get why altitude would affect the tune? The MAP sensor should compensate for the lower air pressure, shouldn't it?
Last edited by bullard123; 08-19-2013 at 09:18 PM.
the ecu still needs to know what the atmospheric pressure is. which JDM ecus dont have them
My intake manifold is only a cheapo XSpower thing i got for next to nothing. its basically a copy of a JDM ITR manifold. Make sure you get an aftermakret B18b/B20B manifold as they fit WAY better than vtec B series ones do.
it was an old water brake type and was a real balancing act to get a good reading.
not enough load, and it would sing to the limiter in a second, to much and would just bog down.
it wasnt really the best thing for it, and is prob why it spun a bearing on the run.
surprisingly enough, it ran sweet as on the way home which did include a run to 6500.
cant wait til can afford to rebuild the motor the way i want it.
ive had my engine at 7500 a few times. wish it made power up there
A dohc 2.0 liter car engine should output no less than 130 hp and similar torque... Compare to any other brand! Just saying...
I hope you can improve. I think a A20 can give better numbers than that with some changes just in timing settings and some parts removal?
^ Yours has a carb its probabaly putting out less hahahaha
it made a mess.
thrust bearings welded to the block, wore bout a 50 thou groove in the block where the bearing goes.
marked the crank up good.
crank needs a 10 thou under grind and going 40 thou over bore.
cheaper to repair what i have than to get another block.
going nuts with it.
200whp shouldnt be to far off
Hardly, the butt dyno doesn't lie on long steep grades good one though!Originally Posted by AccordB20A;11d32212
It's way more power& torque than my lxi hatch and big difference on grades. Just comparing to the other Hondas Ive driven, and our Mazda ztec dohc 2.0 which is alleged 130 hp but is very slow.
No arguing valid without dyno though so... Yeah just the butt which are speculative results lol.
I do need a manual 5 speed seriously I can tell the auto sucking power badly at times.
Last edited by 2oodoor; 08-21-2013 at 03:21 AM.
Considering that Colorado Springs is at about 6000ft above sea level, that graph looks pretty good. Altitude correction is somewhat difficult to do (even knowing the variables) but it could pretty easily make a 10% difference.
At altitude the air is thinner, meaning that less air goes through the engine. Which also means that less fuel is going through the engine as well, so less power. I'm not familiar with the B20 engine but the A20 has not only a MAP sensor (for engine load) but also an absolute pressure sensor for atmospheric pressure. It is able to adjust the AFR to compensate for altitude, but less air still means less power. It's exactly the opposite of a turbo (more air) adding more power.
^ That's what I thought. You'd make overall less power, but it's not going to screw up the "tune." It's not like you'll be running rich at high altitudes. You might get less air, but the computer will also deliver less fuel, the tune will still be the same for the given amount of air... At least that's what my thinking was. There also is no way to get that power back by tuning it for higher altitudes.
Last edited by 2ndGenGuy; 08-21-2013 at 09:17 AM.
2GG that was about the carbed remark more so than...
Its been a while but i just checked in and this is giving me motivation. I have been out of the loop for a bit but i wish i had my stock B20A dynoed as i put some hard miles on it and it seemed solid for what it was. I'm in the middle of moving but if you need anything pm me as i have some parts lying around and may have to think for a moment about what it is i have. I lost track of my B20A but did call the machinist this week as they have had it since Feb but im not pushing with whats been going on otherwise.
it's interesting with some of the dyno graphs I've been looking at even on the facebook page. I'm really kinda surprised that your dyno runs are almost on par with some of the A20 dyno graphs ive been looking at with just a few simple mods. Josh's boosted A20 is the only graph i've seen so far that does not have the same trend lines due to the turbo, it really makes me thing there is more potential in the A20 than many of us think there is
1989 Accord Lx-i hatchback (current DD project)
1986 Olds Cutlass 442 clone (never ending project)
3Geez resident body man
Owner of Wreck-less auto body