Soarer Central: AFM-less tune on the 1UZ

Soarer Central General Soarer Chat AFM-less tune on the 1UZ

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James Buchan
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V8

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Tuesday, February 14, 2012 - 08:44 pm, by: James Buchan (Jrbuch)

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Hey guys, I just thought I'd share that I had an AFM-less tune put on my Cihan Aday last year. Since then, I drove it with the stock piping and AFM still in place, even though I was advised to change it. When it was dynoed last year, it made 175rwkw.

Anyhow, I've just had the new intake piping made up to compliment the tune. It's made a big difference, the note is louder, engine feels more free to rev and it pulls harder towards the redline. So it's making about 180rwkw now. Not huge power, but a good torque curve. Very good for a 4ltr NA engine.

I've noticed in the past some V8 Soarers with superchargers still run the AFM.. it's well worth getting a tune without one of these, they clearly restrict it.

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Myles Jantzen
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Wednesday, February 22, 2012 - 05:46 pm, by: Myles Jantzen (Maxx999)

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That sounds pretty good, what other mod's do you have to get to 180rwkw? Also what kind of intake piping did you use? Cheers

James Buchan
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Wednesday, February 22, 2012 - 06:33 pm, by: James Buchan (Jrbuch)

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Extractors, exhaust, and the e-manage, plus a bottle of octane booster and BP98. Good service, fresh spark plugs, oil, new rotor buttons.

Scott Casey
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Saturday, February 25, 2012 - 04:48 pm, by: Scott Casey (V8soarer_1991)

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guessing you must also have exhaust cams, slight head work, manual conversion.

just looking at a afm and the restriction must be in the toyota's afm algorithm in the ecu

Oleg Akulshin
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Tuesday, February 28, 2012 - 10:48 pm, by: Oleg Akulshin (Sliqu3)

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How did you connect a stock airbox to the 3.5inch pipe? And i thought resonator chamber was a "good" thing for N/A engines, did you try dyno with it on?

James Buchan
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Wednesday, February 29, 2012 - 07:45 pm, by: James Buchan (Jrbuch)

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I don't have exhaust cams, or any head work of anysort. Yeah the AFM is a big restriction. Here is what Cihan had to say about the standard intake on a V8 Soarer.

"The 1UZ-FE + MAF-less Emanage Ultimate combination is a big winner. There are significant power gains to be made by freeing up the standard intake tract. I've measured over 1.2 psi pressure drop over the standard intake manifold at full bore on a standard engine with an exhaust system. Thats 1.2psi out of a possible ~15 psi lost to the airflow meter, intake box, throttle body and air filter. AFM removal, with a 3 inch intake pipe assemble and high flow panel reduced the pressure drop at 7000rpm to 0.6psi. The net difference was 6rwkw from the AFM removal and revised intake setup on a standard engine after the emanage had already been tuned. Tuning + AFM removal combined released in excess of 18rwkw, which translated to a legitimate %15 power increase for this engine.

Another aspect of engine performance that is significantly improved is 'transient' response, the amount of time it takes for the engine to achieve full torque output. I've found that when running with the AFM disconnected, using the TPS as a load source acceleration enrichment corrections are much sharper.

With the complete ignition table corrected for, the improvement coming off the line is significant. I've measured a hefty torque difference under stall, off memory it was over %15 increase in tractive effort <2500rpm."

I had the car taken to a fabricator and had it all fabricated up to the back of the stock airbox.

Ali Saeed
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Wednesday, February 29, 2012 - 10:05 pm, by: Ali Saeed (Ali)

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replace the lower manifold with something better flowing perhaps and some cams and youll have an epic NA engine

James Johnson
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Friday, March 02, 2012 - 05:18 am, by: James Johnson (Jimbo)

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Ali Saeed wrote on Wednesday, February 29, 2012 - 10:05 pm:
replace the lower manifold with something better flowing perhaps and some cams and youll have an epic NA engine

ITB's.....?

Any chance of some pics of the set up for how you have kept the factory airbox?
I have thought about this before and wondered about cutting out a plate of metal and then put a 3" hole in the centre of it and run some 3" pipe from the back of the air box to the intake.

Oleg Akulshin
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Friday, March 02, 2012 - 11:50 am, by: Oleg Akulshin (Sliqu3)

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Isn't the throttle body 3.5"? So it would make sense to keep 3.5" along the whole length

Ali Saeed
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Friday, March 02, 2012 - 06:12 pm, by: Ali Saeed (Ali)

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ITBs could are good too, but what i meant was having the same upper manifold, but replacing the lower part with a custom one, because thats where the restriction is. it just a "cleaner" solution. ITBs would probably flow much better

James Buchan
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Friday, March 02, 2012 - 07:03 pm, by: James Buchan (Jrbuch)

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You're right Ali, and if you combined it with a set of cams, it would go pretty hard. I'll get some photos of the airbox and how it's joined up.

tbh though, i'm now more concerned with changing the suspension from the TRD Bilsteins to a set of Tein Superstreets sometime soon.

James Buchan
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Friday, March 02, 2012 - 08:03 pm, by: James Buchan (Jrbuch)

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Ask and ye shall receive.

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James Johnson
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Saturday, March 03, 2012 - 05:30 am, by: James Johnson (Jimbo)

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Thank you.

Did you make this up or did you get someone to make this? Looks to me you have a pipe that you have squared the end of it to get it to fit the back of the airbox?

Daniel Clarke
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Saturday, March 03, 2012 - 06:27 am, by: Daniel Clarke (Dieseltrain)

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Funny how you say the lower manifold is the restriction , my mates TT Capri still uses the stock lower manifold ! Makes 540rwhp @ 10 psi and has made just over 800 rwhp on 29 psi

Revs to 8500 rpm no worries as well . Just saying as it mustn't be that bad considering what it flows !

Ali Saeed
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Sunday, March 04, 2012 - 01:57 am, by: Ali Saeed (Ali)

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mate ive read all the big arguments they had about this particular fact on v-eight or lextreme. i dont want to get into it but on this engine its likely to show quite a bit of improvement.

James Buchan
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Sunday, March 04, 2012 - 12:09 pm, by: James Buchan (Jrbuch)

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Hi James, yeah I had it made for me, we used the end of the AFM to make a template for plate that connects the pipe to the airbox. It wasn't all that expensive either to get it fabricated.

As for the lower intake manifold, from everything I have read, there is quite abit to be gained by a good port/polish.

This is what Cihan has to say

"A head + camshaft package for example. The 1UZFE has lacklustre intake and exhaust side flow relative to the camshafts used in the engine. Most of the engines smoothness comes from the 'high' compression and baby camshaft duration, ramp and general profile it uses. There's so much to be gained from a deep 60 degree seat cut along with some hand finishing and the usual tricks. Revamped head seal with liven the engine and promote better response and torque across the board. When intake and exhaust side flow is lifted, even so inexpensively, camshaft open area becomes less important. Even a small upgrade in cam profiles (READ: unnoticeable) yields big results."

Brett Harrison
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Sunday, March 04, 2012 - 09:19 pm, by: Brett Harrison (Bretto)

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For the 1U airbox, you can just buy a 7mgte AFM adaptor, and it will bolt up to the back of the 1U airbox once the holes are drilled out slightly oversize.
Ive used this myself and works well, I believe HKS made them, but there is also knock offs on ebay US.

Damian Ware
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Sunday, March 04, 2012 - 10:00 pm, by: Damian Ware (Frozenpod)

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Daniel Clarke wrote on Saturday, March 03, 2012 - 06:27 am:
Funny how you say the lower manifold is the restriction , my mates TT Capri still uses the stock lower manifold ! Makes 540rwhp @ 10 psi and has made just over 800 rwhp on 29 psi

Revs to 8500 rpm no worries as well . Just saying as it mustn't be that bad considering what it flows !

I agree sort of. The stock lower intake manifold is crapish IMO. My tests on the intake system (quite some time ago so I cant recall the exact results) indicate the stock intake system isn't that bad but this was at stock HP and then with forced induction with about 200rwkw.

Even with 6.5psi of boost the stock AFM was only becoming restrictive in the last 500rpm.

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