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PowerFC or SAFC II

damono

By damono,
in Western Australia

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damono Proficient

damono

Posted
Posted

OK guys just need some un-biased opinions. I've come to the conclusion that I need some type of fuel management aids. By looking at the dyno sheet, you can see some real bad dips (40hp near the end). I've been told that its the ecu and its retarding when running higher boost. (correct me if im wrong, this is just what ive been told by a few people as a 'possible cause')

dynosm.jpg

I want to know basically if I should bite the bullet and just go for a power FC, or do the cheaper Super AFC II option. Also.. I can get the Power FC off these forums for about $980 delivered, but how much is this going to cost to get fitted and tuned? The SAFC II is about $400 delivered, but is this cheaper to install and tune as well?

BTW mods are

seperated dump pipe to 3" s/s exh, hks pod, man boost control, Hybrid FMIC.

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https://www.sau.com.au/forums/topic/77715-powerfc-or-safc-ii/
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mitchy_ Grand Master

mitchy_

Posted
Posted

the boost control itself seems to be a bit dip-py aswell, floating around 10psi..

ive got 3" split dump, 3.5" exhaust, pod filter, ARC 450 FMIC, Microtech LT-12 running a pretty stock config, except its a bit flat at the start of the rev range, and i get 270RWHP

(i dont have a picture of my dyno graphy handy, but its pretty much the same as yours, except at the start it gets more power pretty quick, then midrange it flattens off, then it jumps heaps towards the end, and begins to curve down a tad near redline, peaking at 270RWHP at about 135km/h, altho it was dyno'd in 3rd gear)

so it should be safe to say you could get another ~30hp, and a more steady graph with some decent management. :(

ossie_21 Grand Master

ossie_21

Posted
Posted

If you want to add hp by just changing the ecu & want to modify your car later on, PowerFC. The safc will give you the right air-fuel ratio though, it's just a question of budget. What boost are you running????

R34 Mentor

R34

Posted
Posted

If that power dip is due to retardation a SAFC won't help because it only adjusts the fuel not timing I believe.

What did Lumpy recommend as he knows his Nissans so I would go with that.

Other than that I'm another vote for the PFC.

It plugs straight in and only has to be tuned as opposed to wired up then tuned so install and tune costs may not differ that much.

damono Proficient

damono

Posted
  • Author
Posted

Cheers for the advice guys.

bnr#@ - Had the bumper off to re-fibreglass and paint, its back on now, driving around with a big fmic in front wouldnt be too smart :D

ossie_21 - Im running about 0.8ish of a bar. The car drives smoother when running lower boost tho, not so up and down. When running about .8, it takes off good, then tapers off then takes off again a bit. Feels very slow ;)

I think I may need to just bite the bullet and buy the power FC, its just $1600ish I can't really afford to spend at this time, but yeh chances are down the track I 'may' change the turbo, so power fc will seem like a better option

Steve Grand Master

Steve

Posted
Posted

Just to throw a curve ball, sorry - but have you considered the Greddy e-manage?

It starts life as a SAFC, but can be cheaply upgrade to provide FULL management. Lap top programming etc. It really is a versatile ecu, cost a little more than the SAFC, but alot cheaper than power fc, especially initial purchase.

SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

From someone that has done the SAFCII route and then gone the PFC, I would highly recommend going straight to the PFC. I certainly wish I had. If this means driving your car more sedately and saving the extra money, do it. I was very similar to you, had funds for SAFCII but not for PFC but in my opinion, the money i spent on SAFCII + tuning was essentially wasted cause the PFC is such a better tuning option.

Also, in relation to the dips, do a basic diagnostics. I had a serious dip in one of my curves at high rpm (and when i say serious, i mean 100rwhp serious) and this turned out to be a knock sensor wire come loose which a simple diagnostics detected. Plugged it back in, took it for a tune again and no dip. It may help, it may not, but hope it does :)

damono Proficient

damono

Posted
  • Author
Posted

Yeh .. the group buy needs like 30 people tho. HASHIRIYA on these forums is selling power fc + commander for $1020 delivered to door, then put on however much to tune it. Yeh ive read that its a DIY job for sure.

Uneekwahn - $1600 was a rough supplied fitted and tuned price (with 1yr aust warranty)

Just wondering if its worth it buying myself, fitting it, then just driving it somewhere to tune, ive been told powerfc std settings is 'safe' but dont floor it until a tune. Anyone know how much it is just to do a first tune of a powerfc? Keep in mind i won the raffle @ hyperdrive on the weekend so i got a power run and dyno tune to value of $150 ;)

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