thegreatdanes B20A dyno tuned, dynosheet

[thegreatdane]

Before and after. I got a lot of tips and theoretically I should be able to dyno tune it on my own next time. I'm very happy with the results and now I have a basemap for a mildly tuned B20A if anyone else needs something to start from.
http://img405.imageshack.us/img405/8616/dynocomparefu9.jpg

[carotman]

That's a very nice upgrade!

I can't wait until mine is dyno tuned too. I would really like to use your basemap as a starting point.

[thegreatdane]

Sure, you can have it, I just need to download it from the ecu/ostrich. Did you convert to obd1 yet?

The stock injectors almost maxed out at standard fuel pressure, so if I make any changes to the engine that requires more fuel I will have to raise the fuel pressure significantly or use bigger injectors.

[bullard123]

How much horsepower does it have?

[thegreatdane]

168.3HP and 184.6Nm torque. If I raised the rev limiter I'm certain it would go past 170hp but the stock valvetrain probably wont be happy about that in the long run.

[carotman]

I'm sure the bottom end would suffer more than the valvetrain. These engines aren't meant to be pushed past that rev limit. I guess that 7500 would still be Ok tough.

I didn't convert to obd1 yet. I made the adapter harness and I already got the ECU but I'm missing the distributor. I also need to wire the O2 heater and weld the fitting on the downpipe for it. Oh, and it seems I'll need bigger injectors too :D

[TWOLOUDNPROUD]

Nice

[snoopyloopy]

sweet. i'll be watching.

[MessyHonda]

nice almost 170hp is nice on your light cars....that means your car runs high 14s in the quarter miles?

[race12001]

cool caint wait and see if you can crack 200

[halxi]

nice almost 170hp is nice on your light cars....that means your car runs high 14s in the quarter miles?

mid 14's if its driven right.

[forrest89sei]

Very nice!

[thegreatdane]

nice almost 170hp is nice on your light cars....that means your car runs high 14s in the quarter miles?

No idea really but I wouldnt call it light I havent done any weight reductions. But there's plenty of go in it now compared to the stock B20A2 engine that the car was born with.

[thegreatdane]

cool caint wait and see if you can crack 200

I can and I will :rockon: If not sooner then later, I have other stuff going on too.

[shepherd79]

Very nice dyno.
oh and for some american people it is 136.14 lb. ft. torque.
very good numbers.

the only question I have is why between 1500 and 2000 rpm there is that dip. it starts out very nice, but than platoes and goes backup. why is it? not enough fuel?

[thegreatdane]

There seems to be some sort of flow problem in that specific area, it just wouldnt take any fuel, it's unbelievable how little fuel it wanted there.
But as long as it's just in that area it doesnt matter. It's not like my intake is anything to brag about, so there might be something hiding there.

[shepherd79]

what intake manifold are you using?

[thegreatdane]

Standard B16A2 manifold.

[TWOLOUDNPROUD]

I cant wait to dyno my B20a Turbo:)

[shepherd79]

have you thought about going with something better like aftermarket intake manifold?

[MessyHonda]

have you thought about going with something better like aftermarket intake manifold?


even a b16 mani would be better for high RPMs

[thegreatdane]

have you thought about going with something better like aftermarket intake manifold?

I have an edelbrock victorX manifold and a BDL 70>68mm throttle body laying on my shelf so yes it crossed my mind :)



I cant wait to dyno my B20a Turbo:)

I cant wait to see the results hehe For the love of god hurry up :D



I'm sure the bottom end would suffer more than the valvetrain. These engines aren't meant to be pushed past that rev limit. I guess that 7500 would still be Ok tough.

I didn't convert to obd1 yet. I made the adapter harness and I already got the ECU but I'm missing the distributor. I also need to wire the O2 heater and weld the fitting on the downpipe for it. Oh, and it seems I'll need bigger injectors too :D

Theoretically I dont see anything wrong about raising the redline to ~8000rpm as long as you get the bottom end balanced, put in lighter pistons and rods and get a stronger valvetrain. But yea with stock engine 7000rpm is preferable to be safe.
Screw the O2 heater, you can disable that in Crome.

[carotman]

So, got that program ready yet? :D

[jigga225]

168.3HP and 184.6Nm torque.

Thumbs up to that, man

[thegreatdane]

Here's my basemap carotman, it needs a little part throttle fuel tuning. I was going to make that perfect first but my datalogging stopped working after the dyno tune and I cant for the life of me get it to work again which is quite frankly pissing me off right now.
You might want to just copy the table values and make a new rom in Crome to avoid any issues with any plugins I might have added in my rom that you might not have installed.

Here you go: http://home.tiscali.dk/uplort/Forum/b20a-basemap.zip

[TWOLOUDNPROUD]

Here's my basemap carotman, it needs a little part throttle fuel tuning. I was going to make that perfect first but my datalogging stopped working after the dyno tune and I cant for the life of me get it to work again which is quite frankly pissing me off right now.
You might want to just copy the table values and make a new rom in Crome to avoid any issues with any plugins I might have added in my rom that you might not have installed.
Here you go: http://home.tiscali.dk/uplort/Forum/b20a-basemap.zip

thegreatdane that bin is nice i like the way my b20a pulls but i did noticed my Ecu light is now a shift light:rockon:How did you do that ? i have Crome 1.2

[AccordEpicenter]

very nice 'dane, now we're talkin

[TWOLOUDNPROUD]

thegreatdane is the gear ratio's in the bin are thay set to your B20a trany? and and what pin on the Ecu do i need to use to launch control? let me know.

[TWOLOUDNPROUD]

bump

[thegreatdane]

Well, first of all you should update to the latest crome version 1.2.5, it's improved a lot if you use datalogging.

Here's the gear thresholds for B20A tranny, 205/40 17" tires and 7000rpm rev limit:
1st: 61km/h
2nd: 104km/h
3rd: 153km/h
4th: 200km/h
5th: 243km/h
Reverse: 64km/h

But crome doesnt seem to handle the gear calculation very well, I just use it when tuning to only datalog in certain gears.

The shift light is a plugin that you need to install, it's called "addExtrafeatures" and here's a link to the plugin library: http://sourceforge.net/project/showfiles.php?group_id=76687&package_id=158624

To use launch control and FTL I made a special bin, that must have the pin B5 connected to ground to activate the whole thing and uses pin B8 for the clutch switch and reads the clutch switch the opposite way. But I added my own brake light switch as a clutch switch because I dont have cruise control so I dont know if you will need the same bin.

But I can upload it for you if you want to try it.

Btw. I found out why my datalogging didnt want to work, it was the datalogging unit itself (rs232 converter) that took a dump so I just got a new one.

[TWOLOUDNPROUD]

i got my datalogging working and all the gauges work to now that sweet. I will post some video later of it.

[Hans]

i got my datalogging working and all the gauges work to now that sweet. I will post some video later of it.
please do :) thegreatdane nice numbers man!!

[Fushi]

Great numbers !
It must be fun driving it :)
If you convert the car to OBD1, you have to add an O2 sensor ?
I don't have any O2 sensor on the car (Open loop). Where do you add it ? Tail pipe of the headers ?


...But yea with stock engine 7000rpm is preferable to be safe.
Huh ? You're worrying me...
My Accord revs past 7000rpm with the stock Accord B20A2 EDM ECU...
Is there a problem ?

I've noticed dual valve springs (intake and exhaust) when I checked the valve clearance. I think it's standard on every B20A, right ?