Stock Rb25det

[big_cam]

hey guys just wonderin if any one can help me

i got a r33 (rb25det) just put a fmic and pod on today and also upped the boost to 10psi and it really has not made much difference at all i mean i dno if i had high expectations or what......also it get to about 5000 revs and it just sort of has a flat spot until limiter car just feels gutless really

any ideas??

cheers cam

[R31Nismoid]

That is because you are running to much boost without a proper tune.

Back off the boost until you have a decent ECU, pretty common issue.

Here is the search form with pages of results

http://www.skylinesaustralia.com/forums/se...=%2Brich+retard

Have a read, but at the end of the day you need a tune.

[PhilKenSebben]

What brand of fmic and did you fit it yourself?

Is the pod heat shielded and is it a wet or dry element?

These mods alone won't up your power by a huge amount but the flat spot is certainly cause for concern.

[PhilKenSebben]

Nismoid, I ran a fmic and pod and wound the boost up to 10 on mine and never had any issues. It ran like this for a good 9 months before I put in my PFC and had it tuned.

Is it just some cars that have this issue or is it possible that the boost controller is creeping well above 10?

[big_cam]

it is just a blitz lookalike pod witch my bro had lying around of his s13 and the FMIC is a china spec and my brother installed it all and is a mechanic who knows imports as he worked at import performance place for a while but he said that the car is still just restricted by the exh. system (3 inch cat back) and the ecu but he couldn't really answer the flat spot he said a good service may help out but just thought if you guys had some inpt

[PhilKenSebben]

Yeah sorry I retract my question after reading through some of the search results I realised you didn't have an exhaust. Thats the major difference. Full turba back system will help expel that gas, sort that out first. My bad.

[big_cam]

cheers guys my brother said that to get the power but will that help with the flat spot???

[PhilKenSebben]

unlikely. read nismoids post. then research more. then read nismoids post. then buy a turbo back system that isn't china spec. then read nismoids post.

[R31Nismoid]

Nismoid, I ran a fmic and pod and wound the boost up to 10 on mine and never had any issues. It ran like this for a good 9 months before I put in my PFC and had it tuned.

Is it just some cars that have this issue or is it possible that the boost controller is creeping well above 10?

No two cars are the same - some ECU's get more upset than others.

In the past some users have run 13psi without any issues at all, yet some like the OP run 10-11psi and run into the "standard" issues that accompany a ECU that is not liking what it is seeing.

But as you say, it could also be climbing but im assuing the OP has a boost gauge given he knows its running 10psi

Either way though, bad to be doing all of that on a factory exhaust, something that certainly is not helping the situation.

[lookingforboost]

didnt he say in a pervious post he has a 3" cat back???

anyway turn the boost down that will help the flat spot i have turbo back and pod and anything above 9psi and will go into R&R which is what Nismoid is saying to look up

[Kujotk]

as said earlier, no two cars are the same.

But my rb25det went from 160rwkw with just pod and catback to 195rwkw with 3inch turbo back exhaust, fmic and 10psi boost on standard ecu (untuned) and standard turbo, everything else on the car performance wise is stock aswell. Really it was the cheapest and easiest with best bang for buck mods ive done to the car. 10psi for nearly 2 years now and the turbine shaft still has barely any freeplay in it. (but have i just jinxed myself now?)

the graph curves are pretty straight aswell...

i'm just putting it out there and i have no evidence to support it but it makes me wonder if it's a series 1 vs series 2 issue? Series 2's can handle it and series 1's can't???? I know plenty of blokes in series 2's and r34's that havent come across this issue. Has anybody else noticed a pattern emerging?

[Mattw_83]

No two cars are the same - some ECU's get more upset than others.

In the past some users have run 13psi without any issues at all, yet some like the OP run 10-11psi and run into the "standard" issues that accompany a ECU that is not liking what it is seeing.

But as you say, it could also be climbing but im assuing the OP has a boost gauge given he knows its running 10psi

Either way though, bad to be doing all of that on a factory exhaust, something that certainly is not helping the situation.

its true. I ran 11psi on standard ecu. R & R (then the fun starts).... They all seem different.

[jordanlisa69]

it depends how cold the air is at the time.

i live in New Zealand and the weather here atm barely reaches double digits. At full throttal im barely getting to 4500rpm before it goes up to 10psi and hits R&R. my car spikes alot as well. ive only got split downpipe into 3inch straight through, big poddie and turbotech boost t set to 7 psi.

You have got an ecu just like mine which is unlucky because you can only run 9psi, and alot of the time my car seems to run better and faster at 8psi not 9psi.

a full turbo back exhaust probly wont help that much at all because you will be spiking alot unless its nice and hot where you live. otherwise do the exhaust becuase it will need to be done eventually and change the ecu. Im going for a simple plug in ecu such as a mines because its the cheapest option and takes away all of the standard ecu crap restrictions and will let me boost as much as i want to with out any "stopages" haha.

hope that helps a bit

[Harey]

Nistune FTW, will fix all these issues. I would get a tune instead of a fmic if the money is tight. Exhaust, boost upgrade and tune, and only if you can also afford an fmic get one too.

[adis]

need dumpipe and front pipe, plus nistune.

I had the flat spot too, the dumpipe and front pipe will help, but after i got mines ecu, all my problems were solved.

[Harey]

I made 190rwkw with stock dump pipe so its not 'needed' but always a good thing. Depends if you can be bothered installing the b*stard! Front pipe is nice and easy.

[big_cam]

hey guys cheers for the help i put the boost back down but still having a big flat spot.....also as it is a series one i have been told i need to get a z32 ecu and do a whole lot of re-wiring and cutting tracks to get nistune and then i can only go so far with mods so i have been told to go for a power fc d-jetro????

what ecu are any of you other guys running on your series 1?

[mad082]

hey guys cheers for the help i put the boost back down but still having a big flat spot.....also as it is a series one i have been told i need to get a z32 ecu and do a whole lot of re-wiring and cutting tracks to get nistune and then i can only go so far with mods so i have been told to go for a power fc d-jetro????

what ecu are any of you other guys running on your series 1?

series 1 and series 2 33's both need the z32 or r32 ecu for a nistune. it's about 5 wires that need to be cut and swapped for the z32 ecu. not exactly hard

as for only going so far with mods, how much power do you want? there are people running nistunes with 500hp, so i don't think you will run out of scope too quickly. there are just a lot of die hard pfc fans who think it is the best ecu ever made and say that anything else is crap despite the fact they know nothing about them.

[MrR33666]

do a search on toshi he can remap standard 33 ecus

Edited June 10, 2010 by MrR33666

[big_cam]

hey guys just wondering what ecu/tunes you are running on your serie 1 if any of you have series ones

cheers

cam