How Important Is A Tune After Front Mount Install?

[MZTRBO]

Dont waste your time with a walbro, the stock pump will be fine for the stock turbo, unless the stock pump is faulty.

When my car had the stock r33 smic, i noticed a difference in performance when upgrading to a fmic. It did have a tiny bit less throttle response, but it seem to raise the boost and also received alot of cold dense air.

Id say get a tune, he could probaly adjust afr's again and make the car more economical. Dont worry just about power, there's a saving just by having a clean tune. Whats $200 when you might spend an extra $20 on fuel a week from a rich tune.

Tune it if you plan not to mod it anytime soon.

Cheers

Daniel

[TTT]

why would he have a rich tune?

it is already tuned.

why would a FMIC make it run rich?

IF anything, if the FMIC cools the air alot, it will run leaner.

therefore saving him fuel going by your thoughts.

[STATUS]

you will probaly get more power after the tune down low, not more power than before the FMIC was added.... but more power than what it is making now. i find you can usually wind in a bit more timing .

honestley i would do a few more mods then look at a tune, remmeber if the cooler is a good cooler (not a cheap bar and plate jobbie) the gains from a retune will be higher as the soak threshhold is higher and you can afford to leave more timing in up top, without the worry of det. Aslo a better cooler will have a denser charge so if its map based you can run into issues and there is more chance of problems... as your is afm based you dont need to worry.

[Munkyb0y]

cheers trent. the fmic is a tube and fin, just jap type2. and as far as top end power figures, i'm not too hung up on those. i just want the best driveability.

i know what u mean about bringing it back up to the power it had before the fmic, coz i think midrange has suffered a bit, bit it feels as though top end has increased.

I think i will take it for a tune today. i'll let you guys know how it goes.

[TTT]

since you are going to get it redone.

Can you please get a "as it is right now" dyno sheet showing power x rpm and boost

and one when he is finished with same stats.

Just so people can see the difference between FMIC and no changes to FMIC and retune.

then they can also decide if it's worth it or not.

like you said, top end may not change, but the midrange might.

Also, if you have a dyno sheet with the way the car was with same mods but with the R34 SMIC it would be a good comparison too.

Edited December 18, 2007 by GTST

[Munkyb0y]

lol yes maam, i will do my best.

[GTR-80Y]

yeah i'd be keen to see the before an after....shouldnt be too much difference but u never know.

[Munkyb0y]

well guess what? it wasnt different at all. the afr's and boost levels (unichip ebc unit) were identical in the 34smic run 3 months ago, and today's fmic runs.

the guys put the car on the dyno, and did a couple of power runs to get a baseline. the tuner wasnt there at the time (but had a very good reason )

anyway, results were the same. power was down 4kw, but then they warned me everyone's cars had been down 5 - 10 kw lately coz of the weather.

the tuner called in to say he wouldnt be back for ages, so they DIDNT charge me for the power runs (coz they're not trying to get rich off me by recommending fmic's and tunes, contrary to some specualtion earlier... cough* GTST )

they recommended i go back when he was there and get him to see if there would be any benefit from some timing and boost adjustments, if i really wanted it re-tuned. but advised me that the tune was still well within safe limits, and i may procceed to go do donuts if i wish. lol. which of course i do not wish.

i had a chat with the power run dude, and he assured me the fmic is not wasted as it provides a decent safety margin against detonation when running higher boost. and although 12psi on a stocker is at the lower end of that bracket, it's still warranted.

also, sitting around in there for an hour or so makes me want a new turbo. why does that happen?? some kind of subliminal marketing ploy?

so if someone's selling a used gt-rs.... ahh forget it

aaaaaaaaaaaand one more thing. the night i finished installing the cooler, i felt no mid/low range lull at all. so maybe the humidity/heat is actually playing a part in that?

anyway, i'll advise of any further developments if they arise.

Edited December 18, 2007 by Munkyb0y

[MZTRBO]

why would he have a rich tune?

it is already tuned.

why would a FMIC make it run rich?

IF anything, if the FMIC cools the air alot, it will run leaner.

therefore saving him fuel going by your thoughts.

Going from my experience on my car, it ran rich aswell as lean. The stock computer jerks around big time. I was not taking into consideration his tuned unichip though and was refering to a stock untuned ecu.

After imy car was tuned, fuel economy was much better.

Id always have to wash the black smoke of the back bumper when it wasnt tuned and it was hitting R&R constantly.

Munky, surely it wouldnt lose power on the overall figure. Id definately say its due to the heat and humidity. Good luck with it all, as its a very interesting topic/test.

Cheers

[TTT]

well guess what? it wasnt different at all. the afr's and boost levels (unichip ebc unit) were identical in the 34smic run 3 months ago, and today's fmic runs.

the guys put the car on the dyno, and did a couple of power runs to get a baseline. the tuner wasnt there at the time (but had a very good reason )

anyway, results were the same. power was down 4kw, but then they warned me everyone's cars had been down 5 - 10 kw lately coz of the weather.

the tuner called in to say he wouldnt be back for ages, so they DIDNT charge me for the power runs (coz they're not trying to get rich off me by recommending fmic's and tunes, contrary to some specualtion earlier... cough* GTST )

they recommended i go back when he was there and get him to see if there would be any benefit from some timing and boost adjustments, if i really wanted it re-tuned. but advised me that the tune was still well within safe limits, and i may procceed to go do donuts if i wish. lol. which of course i do not wish.

i had a chat with the power run dude, and he assured me the fmic is not wasted as it provides a decent safety margin against detonation when running higher boost. and although 12psi on a stocker is at the lower end of that bracket, it's still warranted.

also, sitting around in there for an hour or so makes me want a new turbo. why does that happen?? some kind of subliminal marketing ploy?

so if someone's selling a used gt-rs.... ahh forget it

aaaaaaaaaaaand one more thing. the night i finished installing the cooler, i felt no mid/low range lull at all. so maybe the humidity/heat is actually playing a part in that?

anyway, i'll advise of any further developments if they arise.

So...

Apart from your little dig at me, the rest was true.

1.) you gained nothing from and FMIC (and actually lost 4kw which is "apparently" due to the weather)

2.) you wasted an hour of your time

3.) You were told to bring it back when the tuner was there so he could try to put some timing in to it and give you more power (maybe your 4kw back) and take your $250 then.

4.) You haven't posted dyno graphs of the SMIC run and the current run for comparison.

They told you you lost 4kw due to weather.

fair enough.

if you had 190 and yesterday got 186...

that is a max power figure.

how about midrange?

that is why I was asking for the 2 graphs (now and back with the SMIC)

And I know you won't feel the throttle response change.

You would only notice it if you went "BACK" to the smic (which you won't bother doing now)

[Munkyb0y]

GTST, you are the most cynical, negative, depressing and demeaning kunt i have come accross on these forums.

Luckily i havent encountered many of your posts before, but those i have all seem to be along the same vein.

Dont post in my threads anymore. you make people wanna kill themselves.

and fyi, they didnt tell me to go back and spend 250. they said if i still wanted to, that the tuner would be able to tell me more, as it was me that was insisting, not them.

and i WILL be taking my car back. coz i know if the tuner decides theres room for improvement, there will be results. and if not, then theres nothing lost, except a precious hour of my time, spent at a dyno, getting some power runs in for free.

The car goes noticeably harder up top, therefore there was no real 4kw loss (which is a fuccken joke to even be discussing, and is the kind of thing bitches get hung up on).

[TTT]

cry me a river you panzy...

if you don't want opinions, why ask for them?

not everyone is going to agree with you.

not everyone is going to talk to you in the manner that you want.

for f*ks sake.

All I was stating were the facts.

and they are that you didn't need the fmic over the R34 SMIC.

it was proven on the dyno.

you admitted to it.

I just said it like it is.

you don't like it that's your problem.

[Tangles]

should always do a fresh tune after a donkey install

[Munkyb0y]

here we go.

firstly, ppl's opinions are often helpful, including those that oppose my own. but yours are ridiculously negative ALL THE TIME.

you may think i have a problem with facts you stated. but i dont. it's the way you go about it.

anyway, lets not turn this into a bitch fest. just dont post in my threads, and thanks for your input thus far. i seriously dont care enough to go on about this sh1t.

cheers

for the rest, i'm happy with the cooler, as said earlier, safety margin if your gonna push your setup is kinda important. i know others agree with is. and we all know theres no power gain from an intercooler. so theres no real shock there. also a nice meaty break of traction in 2nd yesterday (on 18/265's) was better than i'd had previous to the cooler, so i dont see how it was a step backwards at all.

the figures (for what it's worth) 211kw 3 months ago, 207.7kw yesterday. which is actually more like a 3kw difference. and runs 3 months apart will rarely get you the same figure, especially when theyre in different seasons of the year.

ba ba ba GTST, dont reply. theres other threads out there that need your attention

[33_skyline]

^^^ Monkyboy, GTST might come across as rude and what ever but you asked a question

and he answered it, and many other have agreed with him.

It isn't worth a retune not much will change, save the money and buy a fuel pump as they will run out

between 180 - 200kw.

Also from past experience URAS has a lot of knowledge and he even said don't bother.

[Munkyb0y]

dude, i'm not here to discuss GTST. his input was appreciated, his demeaning manner wasnt.

i asked uras to look in and give me his opinion, coz i know he knows his stuff.

and what uras said was exactly what i worked out yesterday, the tune will bring things back into line, but dont expect power gains.

edit: another important thing to note. the guys at the dyno told me that many times, after a fmic install, some cars wont run right until they are re-tuned. so if you're experiencing this, you might want to consider it. my mechanic told me he's done a few installs that resulted in cars running crap till the tune too.

Edited December 18, 2007 by Munkyb0y

[TTT]

Best online cry since "LEAVE BRITNEY ALOOONEE!!!"

[Munkyb0y]

are you gonna keep talking shit? like you do constantly? or you gonna accept that you need to STFU and GTFO (yes acronyms describe my feelings best right now)

[TTT]

I'll take option A thanks Monkeyboy.

[TTT]

seriously though..

You seem angry.

Do you want a hug?