rb25det and running higher boost on stock turbo...

nopistons93 · Jun 22, 2007

alright so i was out the other night and it was decently cold ~65 degrees farenheit. well anyway i was running about 10-11 lbs of boost, when all of a sudden during a 3rd gear pull, my car started bucking and hesitating. I looked down and i was getting 10.6 A/F on my wideband which leads me to believe that is the cause of my problem.

my question is, will tuning help correct this problem if I want to keep running higher boost? Obviously im getting enough fuel as its not leaning out, so it should be rather safe to keep running that boost, I just want to make sure tuning is about all i'd need. thanks!

nopistons93 · Jun 24, 2007

no1 has anything for me? lol

ChuKi RB · Jun 24, 2007

Depending on your mods and what not, tuning is probably your best bet but its not cheap unless you know how to do it yourself. Any tuning shop should help you anyways.

nopistons93 · Jun 24, 2007

yea i can get a tune for 100 around me, but i dont think im done modding yet, so ill just run stock boost to be safe

XIONM7716 · Jun 24, 2007

sounds like you might have boost leak. the stock ecu could do 10psi and not run to rich. what kind of boost controler are you using.

nopistons93 · Jun 25, 2007

im using a profec-b, I have V clamps on my ic setup as well

realSILVIA · Jun 25, 2007

i was running .85 bar on the stock turbo safely w/o any driveability issues, but at .9bar it would exhibit that same issues you're having.....not consistently, but a decent amount of the time

- Daniel

toadx8u · Jun 25, 2007

are u running a fuel press reg if so double check your settings maybe your just a lil high on the pressure and gettin too much fuel

Nismo241 · Jun 25, 2007

Drop the gap on your spark plugs, or change them out if they are fouled.

shockster0429 · Jun 25, 2007

toadx8u said:
are u running a fuel press reg if so double check your settings maybe your just a lil high on the pressure and gettin too much fuel

+1, and also check the plugs too like said before and check for boost leaks also.

There is no need to tune a stock turbo RB the factory ECU can handle it just fine.

nopistons93 · Jun 25, 2007

realSILVIA said:
i was running .85 bar on the stock turbo safely w/o any driveability issues, but at .9bar it would exhibit that same issues you're having.....not consistently, but a decent amount of the time

- Daniel

funny you say that, same thing happens to my car as well. seems these issues are related to colder weather..

I have new plugs gapped to whatever the 300zx tt plugs come with

Nismo241 · Jun 26, 2007

nopistons93 said:
funny you say that, same thing happens to my car as well. seems these issues are related to colder weather..

I have new plugs gapped to whatever the 300zx tt plugs come with

Drop the gap...make it about .025 -.028. Cleared the problem I was having right up.

toadx8u · Jun 26, 2007

lol you were blowing the spark out...

XIONM7716 · Jun 27, 2007

check your plugs. lower the gap and run the cooler plugs if its ngks run the 6 heat range or to make it easy the plugs from a z31turbo.

blurrbosi · Jun 27, 2007

colder weather made le boost go up a little bit and she freaked.

nopistons93 · Jun 29, 2007

thanks guys, ill take the plugs out when i work on teh car next. ill keep it to stock boost until then if i drive it

rb25det and running higher boost on stock turbo...

nopistons93

nopistons93

ChuKi RB

nopistons93

XIONM7716

nopistons93

realSILVIA

toadx8u

Nismo241

shockster0429

nopistons93

Nismo241

toadx8u

XIONM7716

blurrbosi

nopistons93

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