Hi i have a 94 LS with p75 Chipped ECU, its has either a JUN or MUGEN chip, i did not chip it myself so i do not know what settings its for. I just know it chipps redline . do you think my car would run better with a stock ECU? my motor is stock, juss with dc headers, intake, straight pipe. Do u think the ecu would be change fuel settings and advance timing and making it run rich? i just want my redline to come back cuz im ****** scared of over-reving.... plz HELP


Modified by vietblood129 at 10:55 PM 9/25/2005

 

LS motors are not built for high revs...don't do it if your motor is all stock..you might even loose power because of the chip. and if you bought one of the ones off ebay that are like 30 bucks.....good luck its a gamble with those. but for now, do not chip your ecu!

 

go back to your stock ecu, a chipped ecu is wortheless for you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">LS motors are not built for high revs...don't do it if your motor is all stock..you might even loose power because of the chip. and if you bought one of the ones off ebay that are like 30 bucks.....good luck its a gamble with those. but for now, do not chip your ecu!</TD></TR></TABLE>

na it wasnt off ebay, the guy who chipped it was a profesional, but yeah...so my chip prolly making me slower? how come im faster then most LS's and i hang with gsr's and beat some b16's

 

driver i guess...but i spanked on 99 Si's with a single cam vtec with just i/h/e and i know that wouldnt give me a 30hp differences.

 

iono, my LS is juss strong for some reason, im afraid if i trade my ECu for a stock one i would lose power, so im not sure if my ECU is helpin me or not

 

thats why you buy a stock one..your gunna need one once smog time comes around soo minus well :-D

 

well, why dont you ask your chipper what has been done to the maps?
Jun nor mugen make non vtec programs...
So if you did buy one of those generic chips; it prolly runs rich as **** with no rev limit and stock timing.

 

i passed smog with this ECU and it is a Jun or Mugen Chip forsure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vietblood129 &raquo;</TD></TR><TR><TD CLASS="quote">i passed smog with this ECU and it is a Jun or Mugen Chip forsure</TD></TR></TABLE>

that means its running closed loop, it most likely still rich as ****.
And no its not a jun nor mugen program

 

how u gonna tell me its not a jun or mugen chip

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vietblood129 &raquo;</TD></TR><TR><TD CLASS="quote">how u gonna tell me its not a jun or mugen chip</TD></TR></TABLE>

dude.....JUN NOR MUGEN MAKE NON VTEC PROGRAMS.
its just a technicality, they just name it jun/mugen/j's/ etc. for coolness purposes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">dude.....JUN NOR MUGEN MAKE NON VTEC PROGRAMS.
its just a technicality, they just name it jun/mugen/j's/ etc. for coolness purposes.</TD></TR></TABLE>

Exactly.It's a marketing ploy. They just burn a chip, label it "spoon,jdm,mugen,jun,etc" to make it more appealing.

Anyways, what you can do is buy a stock ECU. Run it on your car, and see if there's any difference. If the performance is significantly lower, then i guess you could stick with the "mugen jun jdm" ecu.

 

is there a way i can get it Un-chipped so redline would come back?

 

better yet, get somebody to make you a chip of the stock P75 program and put that in. you're only talking $25 or so, and you'll be able to switch programs somewhat quickly even without a ZIF plug. more than likely, you beat stock GSR or B16-powered cars with crappy drivers or you were racing them and they weren't racing you. people say all the time that they beat my 240SR, but fact is i was coming off the stoplight shifting at 3000 or 3500rpm where i'm just getting to full boost, just hanging out, and they managed to get slightly ahead. if i shift at 4000rpm they get beaten, and if i shift at 7500rpm they just disappear in my dust.

i can garauntee you that if you take your car to a dyno with that chip and a stock one that jun mugen jdm chip is going to suck. besides it's wasting fuel all over the place which is bad for power, no matter what your premonition. i would NEVER put a chip in my ECU that i didn't personally tune to watch every step of the tuning by a real shop on a real dyno. i like my motors and i don't want them to blow up or burn oil or water or something.

 

how can u say i wasnt racing these ppl when i was racing my friends , or going to ONTario at the street races off the line, i beat HB's with LS motors in them in my Integ off the line, beat B16's rolln start, i hang with GSR's racing on freeway multiple times.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vietblood129 &raquo;</TD></TR><TR><TD CLASS="quote">how can u say i wasnt racing these ppl when i was racing my friends , or going to ONTario at the street races off the line, i beat HB's with LS motors in them in my Integ off the line, beat B16's rolln start, i hang with GSR's racing on freeway multiple times.</TD></TR></TABLE>
okay well then your friends aren't as good drivers as you are. all i can say is that with your mods there is no way a chip is giving you any real power. the stock ECU is tuned pretty well for basic mods, and only really needs any changing when you add cams, intake manifold, or something else that greatly alters the shape of the torque curve.