PROBLEM ON MY RB SWAP :( plz help

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outlaw27

Member
High all well here is my mods first....

RB25DET S2
ISIS Manifold
q45 thorttle
TOP FEED 870cc injectros with resistor box. E-85
Aeromotive FPR
FULLY NEW 0 miles rebuilt motor
Top mount manifold with 50 trim turbo
stock maf for now.
safc 2

Now here is the problem.
I had an sr20det before and never had this problem till i moved my battery to the trunk. The problem is the car does not pass 11.8 volts AT ANY POINT and the car runs LIKE CRAP i have tried tunning I'am a tuner... the problem is that the car just runs how it wants it will miss at times and other times nothing. Would drive good for about 5 minutes then GOES STUPID lean.

Now here is my guess that my battery ground is not good enough or something else is up. Can someone point me in the right direction. I really like the rb25det but im getting fed up with it and getting really close to get rid of it.

I will try putting the battery in the front tomorrow see how it goes i will let u guys know. But in the mean time please someone point me in the right direction or share any similar issues. Thanks
 
i believe it was a 2 gauge but i have done this before countless times lol but this time im stomped

and if i sell not for cheap lol alot of after market parts i did not post on my info up there lol anywho yeah imma try tomorrow the battery in the front if it works than ill just get an oddesy battery and hide it by the fender or something.
 
outlaw27 said:
High all well here is my mods first....

RB25DET S2
ISIS Manifold
q45 thorttle
TOP FEED 870cc injectros with resistor box. E-85
Aeromotive FPR
FULLY NEW 0 miles rebuilt motor
Top mount manifold with 50 trim turbo
stock maf for now.
safc 2

Now here is the problem.
I had an sr20det before and never had this problem till i moved my battery to the trunk. The problem is the car does not pass 11.8 volts AT ANY POINT and the car runs LIKE CRAP i have tried tunning I'am a tuner... the problem is that the car just runs how it wants it will miss at times and other times nothing. Would drive good for about 5 minutes then GOES STUPID lean.

Now here is my guess that my battery ground is not good enough or something else is up. Can someone point me in the right direction. I really like the rb25det but im getting fed up with it and getting really close to get rid of it.

I will try putting the battery in the front tomorrow see how it goes i will let u guys know. But in the mean time please someone point me in the right direction or share any similar issues. Thanks
Click to expand...

Isn't is amazing how you answered your own question? Life is awesome!

"I had an sr20det before and never had this problem till i moved my battery to the trunk."
 
It's not the RB dude. I've had my RB25 for three years and it's seen three diffrent shells. Like abe said, you just solved your own shit. Good luck with that.
 
outlaw27 said:
Can someone point me in the right direction. I really like the rb25det but im getting fed up with it and getting really close to get rid of it.
Click to expand...

this S13 did it right the 1st time ( 3.0L>2.5L)

2zp127o.jpg
 
true that^^^^^

---------- Post added at 08:34 AM ---------- Previous post was at 08:33 AM ----------

true that^^^^^^
 
ka-drifter said:
used 0 gauge wire,,,also are u running e-85 on 870cc injectors,,,,arent u supose to used 1000cc for that?
Click to expand...

no 870cc is enough for my power goal.... 1000cc is good but dont need them. im planning on not passing 450 whp for now.

thanks for does that are inputting some help imma try stuff today.
 
as stated...i would NEVER run an SAFC on that setup, but idk if that's your problem...try putting stock intake manifold back on...my buddy had the isis rb25 FFIM and it did'nt run right with it.
 
safc isnt gonna be enough once you change alot.

get a stand alone (best investment anyways) and a good tuner.


for e-85 you will use 30% more fuel than usual so you have to have an injector to keep up with that.

good luck

EDIT: when you relocate the battery you have to use a big wire. try a 0 gauge and go with that. i had this problem with my ka-t. made the switch and it was fine
 
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it sounds like you have a bad connection somewhere double check your ground from the battery re location and maby add another one
 
idk what you have done to ur rb. BUT


I know that you dont need e85 to make 450 with the rb25 so id say, go back to like 450cc an run pump.
Its readily available and well idk prices but id assume its the same or cheaper.

Next, Standalone (mentioned before) BEST thing ull ever do for the rb. Stock comp is lame.
Maybe try nistune? ive heard good things.

Also, stock ignition coils? gay. I was having problems with mine from the rip.
Get MSD for ignition. Ive been using mine for a yr now.
They look good and will give you an overall better performance
than the 10+ yr old nissan coils.

P.S, Nissan gave the rb intake manifolds(rb20/25) long runners for a reason.
also sry if this post stirs up trouble =/
 
no good ideas^ and as for the stock intake manifold yeah it is better for torque and lag purposes but the FFIM will be better on his setup. now idk about the ISIS FFIM lol
 
its funny how ur volts r so low
check the terminal on alt while running
if its still low
ur alt maybe shot
i ran 2 2 ga to the trunk
power an ground
and its grounded in the trunk:bigthumbu
 
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