Any improvement felt under "street driving?" Dyno results look quite impressive. Also, I dont think its smog legal(?).
Dali Chip
- Thread starter jerryho
- Start date
Hi Dyno,
I recently put in the Dali-chip and had dynoed the car after that. Results can be found here:
http://www.nsxprime.com/forums/showthread.php?s=&threadid=19663
On the street, yes, the car seems to feel a bit mor rev-happy. I think the real difference is when you have added H&E to the car. Difference is not much but at times I like the using the higher revs.
I'm can tell anything about being smog legal. First, where I live the rules are different put I don't think you will have any problem there. Isn't smog measured at relatively low revs (like 0-3500 rpm). The Dali-chip will not do much there I think but this is just a guess.
I recently put in the Dali-chip and had dynoed the car after that. Results can be found here:
http://www.nsxprime.com/forums/showthread.php?s=&threadid=19663
On the street, yes, the car seems to feel a bit mor rev-happy. I think the real difference is when you have added H&E to the car. Difference is not much but at times I like the using the higher revs.
I'm can tell anything about being smog legal. First, where I live the rules are different put I don't think you will have any problem there. Isn't smog measured at relatively low revs (like 0-3500 rpm). The Dali-chip will not do much there I think but this is just a guess.
Interestingly, my '91 with Dali chip, Comptech headers and exhaust has a big fat Rejection sticker on it.
Up here in Taxachusetts, we have strict emission laws like Calif. Cars are run on a dyno, under load to determine emission output.
I had a post going a month ago asking for help in diagnosing my problem. So far I've changed plugs, run Techron thru the injectors, installed a new air filter. Still failing for Hydrocarbons, all other parameters are fine.
MJ at Dali doesn't think the chip affects low-rpm fuel mixture (I don't think the test goes over 3k rpm), but just in case, he burned me a stock chip. I plan on installing it this afternoon and trying to get a sticker again this week. I'll let you know what happens.
If that doesn't work, it may be a bad injector and I'll probably have to pay Acura to look at it.
FWIW, my issue seems to be isolated, I have yet to hear from anyone else running the Dali chip that their car failed emissions.
--SF
Up here in Taxachusetts, we have strict emission laws like Calif. Cars are run on a dyno, under load to determine emission output.
I had a post going a month ago asking for help in diagnosing my problem. So far I've changed plugs, run Techron thru the injectors, installed a new air filter. Still failing for Hydrocarbons, all other parameters are fine.
MJ at Dali doesn't think the chip affects low-rpm fuel mixture (I don't think the test goes over 3k rpm), but just in case, he burned me a stock chip. I plan on installing it this afternoon and trying to get a sticker again this week. I'll let you know what happens.
If that doesn't work, it may be a bad injector and I'll probably have to pay Acura to look at it.
FWIW, my issue seems to be isolated, I have yet to hear from anyone else running the Dali chip that their car failed emissions.
--SF
Not trying to be smartalic or anything but since MJ is in CA, I don't he would sell parts for the car that are permanently installed to a resident if they weren't legal?
I could be wrong though.
SF944 said:
you may want consider your EGR valve. a bad one normally is signaled by high NO output, but it may be related.
theeaman-- interesting thought. Is there a way for a shadetree mechanic such as myself to check the EGR valve at home before I pay Acura $80/hr to do it?
SF944,
did they try to apply vacum to the EGR valve? Possible problem with the NSX is that the front wheel doesn't turn and it doesn't apply vacum to EGR valve.
did they try to apply vacum to the EGR valve? Possible problem with the NSX is that the front wheel doesn't turn and it doesn't apply vacum to EGR valve.
Andrie,
"Front wheel" you lost me buddy??
Thanks,
LarryB
"Front wheel" you lost me buddy??
Thanks,
LarryB
easy EGR check
There is an easy way to check the EGR valve.. Start up the engine.. warm it up.. then look at the EGR lift valve carefully as you blip the throttle with your hand on the throttle bracket.. You should see it move up and down a little bit as the throttle rpm goes up and down.. It will not move under a static throttle position no matter how high you rev it without load.. So you have to look for it when you blip the throttle..
Btw, if your EGR isn't working.. The ECU will usually give you a check light after 2 driving cycles.
Eddy
There is an easy way to check the EGR valve.. Start up the engine.. warm it up.. then look at the EGR lift valve carefully as you blip the throttle with your hand on the throttle bracket.. You should see it move up and down a little bit as the throttle rpm goes up and down.. It will not move under a static throttle position no matter how high you rev it without load.. So you have to look for it when you blip the throttle..
Btw, if your EGR isn't working.. The ECU will usually give you a check light after 2 driving cycles.
Eddy
Don't you have to solder the new chip in place?
92NSX said:
If you send your ECU to Mark, it actually goes to Bryan Zublin to have a ZIF (zero insertion force) socket installed, so you can swap the chips whenever you want.
92NSX said:Not trying to be smartalic or anything but since MJ is in CA, I don't he would sell parts for the car that are permanently installed to a resident if they weren't legal?
I could be wrong though.
Nothing is permanent except death and taxes. Our chip installs are done with a ZIF socket for EZ swapping.
Dali chip and Emissions
Somewhat related to original post................
Thanks for everyone who had input on my Massachusetts emissions failure. After two failed attempts to pass with the Dali chip in place, my car (other mods: CAI, exhaust/headers) finally passed (with flying colors, incidentally) this morning, running the STOCK CHIP. The problem had been with HC's only, and the tailpipes were sooted-up as a result. With the stock chip in place, the HC's dropped from 2.21 to 0.86 (Mass limit 1.20).
In fairness to Dali, my experience seems to be isolated, as I have yet to hear of any other emissions failures with the chip (only Massachusetts would probably be affected, since we're required to run the car under load on a dyno now). Furthermore, MJ at Dali was very supportive thoughout this entire fiasco.
Interestingly, my car threw a Check Engine light last night, so even though I'm legal with the feds now, I still may have an EGR valve issue to figure out. So I can't rule out that the EGR valve had been failing intermittently and coincidentally the car passed emissions when it was working properly. Whatever.
For what its worth, the MA emissions test is performed by accelerating in 1st, 2nd, and 3rd gears and following a trace on the computer screen to put a predetermined load on the engine. The highest RPM I saw was 4000 in 1st. Correct me if I'm wrong, but VTEC is no issue at that engine speed. My guess is that the Dali chip was dumping too much fuel at lower RPMs. I'm not sure of the original programming design (whether it was the intent of the programmer to add fuel only at higher RPM or what), or whether or not my issue was just a fluke.
Anyway, thanks again to all who contributed, including Mark at Dali Racing.
--Scott
PS -- can't wait to get the Dali chip back in the car -- ya don't know what ya got til it's gone........the car is a STONE without it!
Somewhat related to original post................
Thanks for everyone who had input on my Massachusetts emissions failure. After two failed attempts to pass with the Dali chip in place, my car (other mods: CAI, exhaust/headers) finally passed (with flying colors, incidentally) this morning, running the STOCK CHIP. The problem had been with HC's only, and the tailpipes were sooted-up as a result. With the stock chip in place, the HC's dropped from 2.21 to 0.86 (Mass limit 1.20).
In fairness to Dali, my experience seems to be isolated, as I have yet to hear of any other emissions failures with the chip (only Massachusetts would probably be affected, since we're required to run the car under load on a dyno now). Furthermore, MJ at Dali was very supportive thoughout this entire fiasco.
Interestingly, my car threw a Check Engine light last night, so even though I'm legal with the feds now, I still may have an EGR valve issue to figure out. So I can't rule out that the EGR valve had been failing intermittently and coincidentally the car passed emissions when it was working properly. Whatever.
For what its worth, the MA emissions test is performed by accelerating in 1st, 2nd, and 3rd gears and following a trace on the computer screen to put a predetermined load on the engine. The highest RPM I saw was 4000 in 1st. Correct me if I'm wrong, but VTEC is no issue at that engine speed. My guess is that the Dali chip was dumping too much fuel at lower RPMs. I'm not sure of the original programming design (whether it was the intent of the programmer to add fuel only at higher RPM or what), or whether or not my issue was just a fluke.
Anyway, thanks again to all who contributed, including Mark at Dali Racing.
--Scott
PS -- can't wait to get the Dali chip back in the car -- ya don't know what ya got til it's gone........the car is a STONE without it!
Good to know.
Right.
As per the prior post.
Re: Dali chip and Emissions
The chip passed in CA on my car with the old tail pipe "snifftest" and the CC has not been registered for several years so I don't know how the chip would fair with today's dyno style test. However, just to be clear, I don't currently claim anywhere on the website that it will pass any emissions test in any state, and we have not in the past either. The only "fiasco" that I is see is the previous owners (not SF944) not saving the OEM chip to swap out for the test if needed. (we made one for SF944 so he would pass). YRMV.
SF944 said:
The chip passed in CA on my car with the old tail pipe "snifftest" and the CC has not been registered for several years so I don't know how the chip would fair with today's dyno style test. However, just to be clear, I don't currently claim anywhere on the website that it will pass any emissions test in any state, and we have not in the past either. The only "fiasco" that I is see is the previous owners (not SF944) not saving the OEM chip to swap out for the test if needed. (we made one for SF944 so he would pass). YRMV.
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