Hi i'm new to this forum
Currently I have a 4th gen lude with the following installed:
H22A swap on a SR body
Aem intake
Rsr exhaust
Msd ignition box and wires
Unorthodox Racing pulley set
Dc sports headers
skunk2 camshafts, cam gears
VAFC
ECU upgrade

I took it in to get tuned a few days ago and was very dissapointed. I know the the JDM H22A engine runs 200hp stock. After about 12 runs on the DynoJet, my results were 160hp to the wheel which is about 189Hp on the fly.
Compression tests came back 215psi for each valve. Leak down test was good. Removed Cat Converter. Air Fuel ratio tuned to 12.9:1.

1. How is it possible that I am running below stock horsepower?
2. Is there any suggestions for any other tests?
3. Tuner suggests that the camshafts may have been installed poorly...could this have such a large affect on performance?

Any other ideas or input would be greatly appreciated
thank you


Modified by nite2nite at 11:12 AM 5/23/2005

 

https://honda-tech.com/zerothread?id=689833

Read number 7.

 

how am i being vague?

 

What type of ecu do you have and what do you mean ecu upgrade? What was ur baseline first pull? id raise the a/f to posslbe 13.5 but everybody has there own way. I do agree those #'s are way to low espically to have 215 cylinder across the board

 

First of all, he means your title on this thread is vague...which it is. Now, as far as power goes, every engine performs differently, and to look for a 10 hp loss on a dyno can be like searching for a needle in a hay stack. Some things can be dyno calibration, what wheels are you using, problem with spark (since it has been messed with), cam gears not tuned properly, ECU upgrade? that's the most questionable thing there, it can affect spark timing maps which can affect power a LOT. And that's just to name a few things. It would help if you showed us your dyno plot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by homesauce &raquo;</TD></TR><TR><TD CLASS="quote">
First of all, he means your title on this thread is vague...which it is. Now, as far as power goes, every engine performs differently, and to look for a 10 hp loss on a dyno can be like searching for a needle in a hay stack. Some things can be dyno calibration, what wheels are you using, problem with spark (since it has been messed with), cam gears not tuned properly, ECU upgrade? that's the most questionable thing there, it can affect spark timing maps which can affect power a LOT. And that's just to name a few things. It would help if you showed us your dyno plot. </TD></TR></TABLE>

agreed

 

I purchased an ECU chip with M-Gen software to remove speed govenor and disable knock sensor. Before i got the chip installed, dynoed at 136hp to the wheel, after installed 144hp to the wheel. I also was running very lean about 13.9-14.1 before the install, after the install i was running 13.2-13.6. Tuner used the VAFC to tune it down to 12.9.......As far as a 10hp loss...well i got dynoed at 189hp with all mods, the stock engine alone is 200hp. how is it possible that with all the mods that i am running less then stock is my main concern...
Getting my dyno sheets e-mailed to me, will post ASAP
Any feed back is appreciated..

 

OK man, first of all, you are not considering running "lean" with an A/F of 13.9 While turbocharged applications you want it around 11-13, doesn't mean you need it that rich. Stoichiometric is right under 15. Anything above that is technically lean. To make the most power you want it a little rich, but I'm no NA guru, but I know enough to know that you can run leaner than 12.9 to maximize power.
As far as power, stock JDM H22's do not dyno at 200 to the wheels, they are flywheel. Plus manufacturers power ratings are a lot of marketing and BS. Your 180 or so is to the wheels right? I wouldn't worry too much about it. I told you before, there can be too many variables.

 

Sorry dude but the stock h22a is 200hp on the fly....i dynoed at 189hp on the fly and 160whp so 11hp less than stock with all mods....200hp is the stock output of the engine with no mods....hence the fact i am losing a lot of power (about 30-50hp) with all my mods

 

if you think your getting 30-50HP with your mods you are mistaken.. yes your numbers are alittle low, but its within tolorance in my opinion.. how many miles are on this motor?.. are the cams set at TDC correctly?..
put the stock ing and wires back on, and try it like that.. alot of times aftermarket wires interfer with the pick up on the dynojets.
truefully your mods, would only get you about 10-15 more to the wheels tops.. what size tires and rims did u run on the dyno?
hows your clutch?
lightened or stock flywheel?
there are lots of variables, and its hard to say but again i say your within tolorance..
but tuning on a VAFC is not going to get you the power you are expecting

 

so it is proper to be running less then stock with all the mods i put in?...i dun understand the purpose of mods then ....40k miles, 215psi for compression....
17inch rims with brigestone tires

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JonGP4 &raquo;</TD></TR><TR><TD CLASS="quote"> are the cams set at TDC correctly?..
put the stock ing and wires back on, and try it like that.. alot of times aftermarket wires interfer with the pick up on the dynojets. </TD></TR></TABLE>

Those are two of the main things I'd look at, plus the ecu. I've seen several people make 8-15 whp less because of their aftermarket wires. What skunk cams are you using? Were they dialed in? (basically what JonGP4 was asking about TDC).

 

dude, it's not good power, but not ubsurdly low either. Im sorry you dynoed so low, but we can't help you narrow what you're problem with your engine is man, it's just too big of a field. Ask your tuner?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nite2nite &raquo;</TD></TR><TR><TD CLASS="quote">I purchased an ECU chip with M-Gen software to remove speed govenor and disable knock sensor. Before i got the chip installed, dynoed at 136hp to the wheel, after installed 144hp to the wheel. I also was running very lean about 13.9-14.1 before the install, after the install i was running 13.2-13.6. Tuner used the VAFC to tune it down to 12.9.......As far as a 10hp loss...well i got dynoed at 189hp with all mods, the stock engine alone is 200hp. how is it possible that with all the mods that i am running less then stock is my main concern...
Getting my dyno sheets e-mailed to me, will post ASAP
Any feed back is appreciated..</TD></TR></TABLE>
You still didnt tell what ecu your using? P13 P14 P28 P72 what injectors? fuel pump?