felix_is_alive

ok , i know some people dont like sharing this stuff , but maybe someone could help a fellow rotorhead
As some of you know , i have been plaged with this microtech curse , that i cannot seem to get the car to run (well)
i have tried probably everything , so i am open to any suggestions
what i would like is to see some maps for timing /fuel staging values to compare with mine to see if i got it right , or if i am horribly off
my setup is as follows
20B street ported /doweled
1000cc primaries /1600cc secondaries
turbonetics T76 1.32 AR turbine
front mount intercooler
microtech LTX12
dual walbro pumps
bigger fuel lines
aeromotive fuel press regulator

I am trying to run 10psi without issues , and every attempt so far , has failed
i get one clean run without issues , then if i try it again i get "breakups/missfiring " (at least sounds like that)
the car isnt leaning out when this happens , A/F is around 12
i dont see any drop in fuel press
i did a datalogging and it all seemed fine
but yet the problem is there
funny thing is when i drive the car i get one clean run , i can go through all gears without a problem , car pulls insane at just 9psi
when i try it again , after that , as soon as i hit second gear and floor it , i get frustrated by failure

i am very aware that no 2 engines are the same and that the maps wont help if i pass them over to my computer , but this is just for me to compare and get a general idea
And of course if anyone has encountered a problem similar to this , suggestions are welcome

Any help is of outmost welcome

BASTARD

iTrader: (4)

A 13b with similar setup should be good for referencing the fuel and ignition maps... but it sounds like you have an electrical breakup issue, maybe a bad coil or plug lead

*edit*

you can get some base maps from the Haltech sub forum... then down load the software from the Haltech website to look at them

felix_is_alive

just went again for a drive to double check A/F`s i am getting low 12`s high 11`s so its no leaning condition , Bastard , it does sound like a electrical issue , something with ignition ,
i forgot to mention i have MSD blaster coils , these according to john from microtech are microtech compatible ( i know there was one that wasnt)
my god , when it runs , its incredible , i cant believe how fast it is with just 9 psi , god damn scary ,
please help guys i need to boost this thing , cant wait to see what it does at higher boost

BASTARD

iTrader: (4)

tell us a little more about your setup... are you using the 20b CAS?... I am unfamiliar with the LTX12, does it have filters and gains for the trigger? whats your timing map look like?

felix_is_alive

ltx12 is basically the same as the 8 series , i am running the 20B cas ,(wich at first i thought could have a problem ,so i swapped it with a cosmo cas , since i had one in the shop , they are the same anyways ) for you to have an idea of my timing values

Timing map
500=18
1000=19
1500=21
2000=23
2500=27
3000=27
3000 to 8000 is all 27

timing MAP map
30hg=00
24hg=+05
18hg=+04
12hg=+03
6hg=+02
00hg=00
2psi=-02
4psi=-03
8psi=-04
10psi=-06
14psi=-09

Load map (injector)
30hg=0.62ms
24hg=0.62ms
18hg=0.82ms
12hg=1.24ms
06hg=1.62ms
00hg=2.05ms
02psi=2.62ms
04psi=2.90ms
08psi=3.19ms
10psi=3.43ms


Rev stage=2500

Mapstage=01psi

% stage=75%

felix_is_alive

hhmm , i was thinking this over again what u said , i can , check the coils ,
i have a supra here with the same coils i am using , i could swap them to check
could a bad coil be all thats keeping me in this frustration ?

felix_is_alive

nothing?

felix_is_alive

don`t know if any of this helps ,but my tach gauge has been acting kind of wierd lately also

RotaryBred

sounds just like my issue, accept i am using a PFC and have not gotten a single good run yet over 10psi. i checked all of the resistances on the coils for the primary and secodary windings and they all check out fine. at this point i'm leaning towards electrical interference in my CAS wires. i'm going to pick up some new shielded wire and try that out. unfortunately for me, the problem has been getting worse... now over 5-6 psi it breaks up

felix_is_alive

Dude , where are youre coils located inside youre engine bay ?
are there somewhere close to the engine?

RotaryBred

yes... but i never thought of this being a possible problem... the stock coils are ON the engine LoL

felix_is_alive

nice engine bay , very impressive
It is true though , thought maybe heat would be an issue but i swapped my coils with a few known good ones , and i still have the same problems
i am not shure but as a precaution i am getting new wires i heard some people were having problems with the MSD wires , which i see you have too , problem is where i am i can only get the same wires (MSD) ...lets hope i get a box with good ones
if that does not solve the problem , i will change my plugs (again) with fresh ones to double check there is no error there
i am figuring if none of that doesn`t solve the problem , there are only 2 things left
1 interference
2 bad ECU (although i dont see how )

nonetheless i will report here what i find , maybe it will help you too

BTW , just noticed youre intercooler , nice!,..... those suckers are hard to find nowadays right?

RotaryBred

thanks for the compliments on my engine bay.. and yes the older APEXi GT hybrid is a rarety now. Mine came with the car with the twin power intakes kit. I made my own MSD wires since my coils are in a custom location, but i re-made them 3 times using a ratcheting wire crimper and checked resistance and they were all fine, but that doesn't mean i'm not getting interference. maybe i should just be on the safe side and completely cover every inch of my car in aluminum foil

felix_is_alive

**** ...!!...i am at the same place right now , just changed new wires ,
still nothing , i even relocated the CAS wires to route them away from the alternator , but still nothing
i am going to change my plugs today (wait a bit for the engine to cool down ) and see if maybe my plugs are dead , ...although they are fairly new
i will most likely change over to all around 9`s
seriously , this problem is very f#@%* anoying
let me know

felix_is_alive

well ...just did the spark plug bit , and as expected , nothing
i have no idea what this could be
i`ve changed plugs , coils , wires , relocated CAS wires
i just dont see how it could be doing this

teachermechanic

iTrader: (4)

Hi, last year i had same problem miss fire at 7Lbs. with same LTX12 and 20B.
Just put NGK BR10EG on "T" side and now no problem to push boost to 15Lbs.
If it's not resolve problem PM me and i will check for timing (Tuned by Steeve K.).
Yamaha cycle dealer for this plugs.

felix_is_alive

dude thanks ...going to hunt these plugs down ..NOW!!
will post results

damn bro , saw your`e dyno vid ...very impressive ...what boost did you hit the 700+ ??

felix_is_alive

Teacher ...i bont know if youre a woman or a man ....but if you would be standing in front of me i would kiss you ......damn thing worked
i couldnt get #10 plugs i got 11`s
put them in and car actually works ....i am still trembling ....i dont know if its from the speed or from pure joy

dyno sheet will follow soon and i will try and post some vids
Thanks guys ,all of you ......you are all awesome

BASTARD

iTrader: (4)

sweeeeeeeet... now go make a video so we can all jones

t-von

iTrader: (8)

Trailing plugs? It's amazing all the little things you have to watch out for when boosting the performance of an engine.

t-von

iTrader: (8)

Since this cured felix's problem, do you think this is an isolated issue involving the Ltx-12 or could one expect to have a similar problem with any ecu? I'm going to be running and e11-v2.

classicauto

iTrader: (3)

nvm

BASTARD

iTrader: (4)

yeah... good question. I am running a E11v2 and have a misfire at the 3800-4000 rpm range. I am running N/A and believe my issues are alternator interference issues... but maybe i am wrong. I will try 10's in the trailing and see what happens

teachermechanic

iTrader: (4)

No i am not a girl, but i am realy teacher in mechanic Ha ha ha.
I am realy happy for you felix_is_alive .
I will check on my spark tomorrow because i have one other brand plug work well on 20B and don't need special socket for put on the engine.

felix_is_alive

i am also interested in seeing other people react to this , specifically people with other ecu`s , very curious if its a issue only with microtech or if it is in general
Regardless its awesome the power , just stupifying
If someone else could also chime in on the ecu issue would be great
i am going to try e few of the greddy pro rotary spark plugs
if there is anything there i will report here also
again thanks guys , a very heavy weight has been lifted of of me
now i gotta go make some video`s