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Thread: B20A dyno results in!!

  1. #26

    bullard123's Avatar
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    Re: B20A dyno results in!!

    Quote Originally Posted by 2oodoor View Post
    No it doesn't

    Also besides a "tune" using obd, there is something wrong with what ya got, as in what's there isn't set right. What has ben recommended for mods so far is spot on, Im not disagreeing with that.
    Nah the motor is fine. No check engine lights are on and she runs nicely. Now that i think about the rev limiter, high altitude and the car not being tuned, she seems to be right on like 2nd gen guy said. My main focus now is to get the obd-1 conversion done with some bolt on mods and get her redyno'ed



  2. #27
    SEi User Hauntd ca3's Avatar
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    Re: B20A dyno results in!!

    Quote Originally Posted by bullard123 View Post
    @ Haunted Ca3. Yeah not bad. Is yours pretty much stock?
    when i ran it, it had headers,2.25 inch exhaust and sri.
    also had flat battery mod,needs a service mod, and only pulling 5500rpm.
    would hate to imagine what would have happened hitting the limiter

  3. #28

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    Re: B20A dyno results in!!

    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....

  4. #29

    bullard123's Avatar
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    Re: B20A dyno results in!!

    Quote Originally Posted by Hauntd ca3 View Post
    when i ran it, it had headers,2.25 inch exhaust and sri.
    also had flat battery mod,needs a service mod, and only pulling 5500rpm.
    would hate to imagine what would have happened hitting the limiter
    Ahhh i see. That explains why your numbers were lower. Lol at the needs a service mod. Why was it only revving to 5500 rpm's?

  5. #30

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    Re: B20A dyno results in!!

    Quote Originally Posted by AccordB20A View Post
    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 was running regular unleaded when I did my run which is 85. Aaron which intake manifold are you running?

  6. #31

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    Re: B20A dyno results in!!

    I don't get why altitude would affect the tune? The MAP sensor should compensate for the lower air pressure, shouldn't it?

  7. #32

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    Re: B20A dyno results in!!

    Quote Originally Posted by 2ndGenGuy View Post
    I don't get why altitude would affect the tune? The MAP sensor should compensate for the lower air pressure, shouldn't it?
    They say the high altitude robs horsepower. I was expecting the numbers to be slightly lower because of that. The thin air out here sucks lol

    As far as the tune is concerned they said that was a total different issue I had to deal with
    Last edited by bullard123; 08-19-2013 at 09:18 PM.

  8. #33

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    Re: B20A dyno results in!!

    the ecu still needs to know what the atmospheric pressure is. which JDM ecus dont have them

  9. #34

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    Re: B20A dyno results in!!

    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.

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    SEi User Hauntd ca3's Avatar
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    Re: B20A dyno results in!!

    Quote Originally Posted by bullard123 View Post
    Ahhh i see. That explains why your numbers were lower. Lol at the needs a service mod. Why was it only revving to 5500 rpm's?
    the needs a service mod was why i only went to 5500rpm on the dyno.
    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.

  11. #36

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    Re: B20A dyno results in!!

    ive had my engine at 7500 a few times. wish it made power up there

  12. #37

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    Re: B20A dyno results in!!

    Quote Originally Posted by AccordB20A View Post
    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.
    Ok cool. So its gonna need some slight modifications to fit?

  13. #38

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    Re: B20A dyno results in!!

    Quote Originally Posted by Hauntd ca3 View Post
    the needs a service mod was why i only went to 5500rpm on the dyno.
    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.
    Ahhh I see lol wow. I guess it was good in a way to rev it high to reveal what issues it had. Are you planning on getting another B20A as a backup?

  14. #39

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    Re: B20A dyno results in!!

    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?

  15. #40

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    Re: B20A dyno results in!!

    ^ Yours has a carb its probabaly putting out less hahahaha

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    Re: B20A dyno results in!!

    Quote Originally Posted by bullard123 View Post
    Ahhh I see lol wow. I guess it was good in a way to rev it high to reveal what issues it had. Are you planning on getting another B20A as a backup?
    its going to cost me bout 200 to repair my block.
    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

  17. #42

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    Re: B20A dyno results in!!

    Quote Originally Posted by AccordB20A;11d32212
    ^ Yours has a carb its probabaly putting out less hahahaha
    Hardly, the butt dyno doesn't lie on long steep grades good one though!
    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.

  18. #43

    cygnus x-1's Avatar
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    Re: B20A dyno results in!!

    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.

    C|

  19. #44

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    Re: B20A dyno results in!!

    ^ 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.

    Quote Originally Posted by 2oodoor View Post
    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?
    I don't think that means he's low on power though necessarily. He put down 118 to the wheels. If we were assuming his engine made 130 to the crank, that is either a 9% drivetrain loss, or he is making well over 130hp. And yeah, considering the altitude...
    Last edited by 2ndGenGuy; 08-21-2013 at 09:17 AM.

  20. #45

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    Re: B20A dyno results in!!

    2GG that was about the carbed remark more so than...

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    Re: B20A dyno results in!!

    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.

  22. #47

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    Re: B20A dyno results in!!

    Quote Originally Posted by cygnus x-1 View Post
    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.

    C|
    Exactly! Hit the nail right on the head. People even have a hard time running here too which is why we have the Olympic Training Center located here in town. A lot of known Olympic athletes come to train here at higher altitudes which helps cut time off of their times when they run at sea level. I remember when I first got here when I was in the Military and ran. I thought I was gonna die for lack of oxygen lol

  23. #48

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    Re: B20A dyno results in!!

    Quote Originally Posted by Hauntd ca3 View Post
    its going to cost me bout 200 to repair my block.
    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
    Whoa bro!! That sounds pretty Catastrophic. I bet that made a loud noise while you was on the dyno

  24. #49

    bullard123's Avatar
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    Re: B20A dyno results in!!

    Quote Originally Posted by RobT5580 View Post
    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.
    What up Rob!! Yeah I was wondering how your build was going. I'm glad I finally got around to doing mine. Everybody kept asking me which engine I had. All I saw there was a stupid amount of Subaru's lol . Pm sent

  25. #50
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    Re: B20A dyno results in!!

    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

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