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Registered:
May 2002
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AVC-R in 1JZ-GTE / JZA70
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Wed, 24 July 2002 14:23
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Hi Peoples,
Just got a quote for an AVC-R for $800 fitted ($100 fitting)to a stock 1JZGTE computer.
- Can I fit this myself easily?
- Do I need a dyno sesh as I have heard it is better to tune on the read anyhow.
BIG QN - How do I tell how lean or rich it runs when on the road?
- Do I need a A/F ratio meter as well?
- I dont have a FCD so this is a good way of doing both at the same time.
- Is there a better bang for bux sytem considering I am chasing 290-300FWkW with stock fuelling system and stock turbos with a tuned twin downpipe, 4.0" intake, stock JZA70 intercooler (soon to be upgraded) and a 3.0" exhaust. I am a little worried about the fuelling but have been told the system should be up to it...just!.
Thanks,
Pete
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Location:
Adelaide
Registered:
June 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 01:35
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- Can I fit this myself easily?
Yes
- Do I need a dyno sesh as I have heard it is better to tune on the read anyhow.
IMO, yes
- BIG QN - How do I tell how lean or rich it runs when on the road?
You can't
- Do I need a A/F ratio meter as well?
Not really, IMO they just waste space. Get an EGT guage instead.
- I dont have a FCD so this is a good way of doing both at the same time.
No, it's not. An avc-r will not prevent fuel-cut, you still need an FCD.
- Is there a better bang for bux sytem considering I am chasing 290-300FWkW with stock fuelling system and stock turbos with a tuned twin downpipe, 4.0" intake, stock JZA70 intercooler (soon to be upgraded) and a 3.0" exhaust. I am a little worried about the fuelling but have been told the system should be up to it...just!.
You haven't got a hope of getting that kind of power at the wheels from the stock turbos. Sorry to disappoint you. You might get 210-220, but that's about it. You need bigger twins or a big single to make that kinda power, either way, big bucks. I think I saw someone advertising an off-the shelf twin system for the 1j a while back, if I recall it was around $4000.
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 03:13
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You can easily fit these if tou have the instructions translated and you have the colours of wires
I wouldn't recommend tuning on the road, as it is too difficult looking at AFM/EGT while fiddling with the AFC
Budget a few hundred bux for tuning
I have mine tuned for 0.9 bar + AF ratio around 12, and you are welcome to the settings, BUT, your car may be set up slightly different and I don't want to be responsible for any lean-outs and detonation. Best to get it checked on dyno with a wide band AF meter. It might save you a few dollars in dyno time though to start plugging in rough figures before you start, then fine tune on dyno.
The only way the AFC would work as a FCD would be through its action tuning down the MAP sensor output. However, at high boosts, you may not want to tune them down too far.
Let me know what intercooler you are heading towards and the gains you get
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Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 03:22
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Thanks for the reply guys,
I did say flywheel kW if you read carefully, I am aware of what the turbos will and wont do and 220rwkW (perhaps 225)is about it.
Why is it that people have sworn that the AVC-R incorporates the FCD.??
I also read about the HAWK computer that you can use a Laptop to tune. This costs a bit over a grand, perhaps this is a better option? How much is a WOLF 3D?
If I fit a HKS FCD, will the A/F ratios be safe for 1bar operation, or is there a good chance it will not work. I really only have less than $1000 all up to use right now. perhaps it is better to save a bit more.
Thanks in advance,
Pete
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 03:32
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I'm not sure 100% that the AFC will disable fuel/boost cut, but it will raise the threshold for as high as the MAP signal is adjusted down. in other word, if normal boost cut is 14 psi, by manipulating the MAP signal via the AFC, you can get the ECU to think it is seeing 14 psi by reducing the MAP signal (ie. from 16 psai back down to 14psi)
I had my Greddy FCD installed before my AFC and I don't know if I actually need it now. I just installed it because it was cheaper than putting in the AFC, and it was all I could afford at the time. I safely ran 1 bar with it but it was undoubtedly running rich.
If you get the AFC first, you would get some gains anyway in power. The FCD doesn't effectively give you more power apart from turning up the boost.
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Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 05:32
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Thanks heaps, that answers my question perfectly.
So I can firstly stretch the existing MAP, then adjust the percentage fuelling to compensate.
I think I'll go with the AVC-R. I Simply dont have the dosh to get a full computer and having an fully adjustable system is what I want. I am assuming that the stock computer compensates well enough for other components that the AVC-R does not change such as Air temp etc.
It's a long road to understanding this stuff properly hey.
Tha plan is to get it fitted and on the dyno, stretch the maps to 16psi, then compensate for fuelling set to max of 15psi.
I have been told that a UNICHIP i also good but I want to be able to adjust for hot and cold weather, aspecially with the turbos pumping out as much heat as they do.
Thanks a heap.
Pete
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Location:
Sydney
Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Thu, 25 July 2002 11:29
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1jwunder
I assume you are referring to the Apexi S-AFC which is a Air/Fuel piggyback controller and not the AVC-R which is an Electronic Boost Controller.
The S-AFC can be easily wired up by you, but I would recommend having it tuned on the Dyno.
I just wired mine up and left it all zero'd out so it ran the stock fuel mapping until I got it tuned. Tuning will only take 10-15 mins and the changes are instant on the next dyno run.
The S-AFC will raise the FCD threshold and reduce the need for an FCD eg mine is trimming 15% fuel at high load/revs so my map signal is being reduced by 15% at the ECU - when it's running 1 bar, the ECU sees it at 15% less.
Benefits of the S-AFC are:
more power, ~6-8rwkw, due to reduced overfuelling
better fuel economy - I'm getting ~80k's more to a tank
elimintated my need to run an FCD
A full exhaust upgrade, intake restriction removal, 1 bar boost and S-AFC should see you close to the 300fwkw without getting close to requiring any fuelling upgrade
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Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Fri, 26 July 2002 06:52
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Thanks for that, very very informative......
As far as i have been told, the AVC-R is the new version of the s-AFC. Doesn't matter, I'll sort that out with a dealer.
Good to hear about the fuelling, that was going to cost a lot.
Also good to hear about the 300kW I am chasing...I should be happy with that....mabey?
Twin downpipes are coming, keeping stock intercooler till I can afford a new one.
Cheers,
Pete
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Location:
Sydney
Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Fri, 26 July 2002 10:03
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yeah 1j is right i just purchased the S-AFC and its the update model, its cool if you plan to stay around the 300 odd kilowatts at the fly...anyway i was going to say just get one second hand cause for an extra 500 on top of what you were outlaying you can get a secondhand powerFC look on www.ebay.com.au
i got mine for around 400 i think...(it was a few months ago)
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Location:
Wollongong
Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Fri, 26 July 2002 10:19
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1JWunder,
Manny was correct, the AVC-R is an electronic boost controller, and the S-AFC modifies Air/Fuel mixtures. Two totally different devices. The AVC-R did not replace the S-AFC.
Have a look on the APEXi site for more info http://www.apexi-usa.com/electronics.asp
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Registered:
May 2002
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Re: AVC-R in 1JZ-GTE / JZA70
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Mon, 29 July 2002 01:28
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Thanks all....
If you hear of a second hand F-AFC floating about, get them to email me.
peterivanac@hotmail.com
P
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