typeR

YA only above 81 mph

bigmonkey70

if this is the case then you don't need one. You already got the Venom ..... j/k

Beiruty

4 weeks and we would all know what it is...

Unless Snook would post his sneak preview very soon

dean078

what ar eyou talking about, butthead?

why don't you make like a tree, and GET OUT OF HERE!:p

scalbert

As mentioned, we don not have a MAF. A MAF is a Mass Airflow Sensors based system, ususally either Hot Wire type or Karmann Vortex style.

We use speed density where the values from the MAT (Manifold Air Temperature) and the MAP (Manifold Absolute Pressure) are used to caluculate density since the volume does not change.

I would not think they are messing with the MAP. The only way to see the gains they are proclaming is if our fuel maps were way off to begin with. I still feel it is ignition related. Either a new prox bracket or electrically shifting the phase.

Beiruty

He he maybe we should ask Xephyr (Chris K.), he might have some clues ...

matt7184

The Electric Supercharger is BS according to dynos on many cars I have seen. Essentially, you are adding an obstruction in your intake path, which will hurt your performance. The fan does not have enough power to give you "real" boost. Save your money.

From all MAP/MAF sensor replacements I have seen, a pretty much across the board performance gain was seen.

moomaster_99

E-Chargers!!! HAHAHAHAAHAH!!! Classic!!!

Beiruty

Anyone knows where I can see some MAP/MAF sensor replacements dynos.....

scalbert

You really shouldn't group the two. The MAF measures Mass Flow, giving a signal that the PCM uses for 80+% of it's load calculation. This signal is calibrated to the MAF body inside diameter to output a known value in typically a frequency signal, 5V TTL. Some are low frequency, 0 - 2.0 kHz. Some are high frequency, 1.5 - 10.0 kHz. But that normally represent Grams/Sec or similar for their calibrated range.

A MAP is just a pressure sensor (motorola piezo based, probably). It measures absolute pressure only and knows nothing about the engine other than what the current manifold absolute pressure is. It's signal is normally voltage based, 1.5 - 4.5 VDC. They come in 1, 2 and 3 Bar units. I suspect that we have a 1 Bar unit, no real need to measure much over atmosphere.

People have tweaked the pressure signals on factory turbo's cars so they can raise the boost above the factory hard limit. But messing with this signal would just throw off the fueling in most cases on an NA vehicle.

Most of the gains from changing a MAF are from going to a freer flowing unit, i.e. less restrictive, which has been properly calibrated to give the same or near (maybe a slight tweak) frequency as the stock unit with the same mass of air flowing through.

Beiruty

hmmm, same as those MAF conversion kits by www.splitsecond.com

scalbert

The ARC2 by SplitSecond allows you to modify the signal and works well. I was the beta tester for this unit on the GTP when I had it. I could run 38lb injectors without a problem. You could also use a larger MAF and adjust the signal to meet the needs.

The nice thing was that you could tune it so that it didn't affect the fuel trim table (the PCM's ability to adjust for conditions) during cruise and idle. But go WOT and you could have the fueling that you wanted and needed contrary to what the factory set it at.

But since we don't have a MAF this is worthless to us. But a fun and useful device nevertheless.

Beiruty

SO, now Snook said he will get one soon to be installed on his TL, get it reviewed, post installation instruction.....and taking pre-orders.

The question, what is the best estimate for this to happen?

Syncivic said that it could happen on or before SEMA show (End of this month)....

What is the best guess?

typeR

to the experts:...does it make sense that if you increased the size of the intake runners that the computer would sense the need for more fuel hence making more power...
my thought s again are a plate that goes on top of the runners that mirror there path increasing there size ...any thoughts??? certainly a 5 min. bolt on

matt7184

The dyno of this "mystery mod" is not intake runners, by my guess. The extended runner will not give you a broad power gain like this mod. I cant remember which, but you sacrifice bottom or top end with longer intake runners. That is why many cars have variable length intake runners.

scalbert

The plenmum design in the Type S is not a variable length style, it is resonance. The length does not change nor is the valve to switch between lengths.

The intake runner lengths are fixed and flow from the end tanks and turn down towards the head ports. But what does change is the aprearent volume being presented to each end tank. Our intake manifolds have what could be considered to be three chambers. Two on either side of the engine and one in between these two directly over the top of the engine 'V'. This center chamber has a butterfly valves seperating it in two.

From each end tank there are multiple paths. Of course there is the one intlet from the throttle body. There are also the previously mentioned runners to the ports. But there are also as set of openings that connect to the center chamber.

At low speed, below 3800 revs, the butterfly valve is closed essentially seperating the inner chamber and the two end tanks. As the revs climb past 3800 this valve is commanded open by the PCM. This now creates an open path between each of the two end tanks.

But it is due to this that the air pressure will vary at each end tank causing a resonance effect increasing the amount of air in the ends tanks which is now available to the engine.

Just wanted to clear this area. BTW, on variable length runner systems the long runner is used for low RPM and the short for high revs. But it doesn't apply here.

I'll try and remember to post a link to an expanded veiw of the manifold and runners system in the Type S engine.

scalbert

Just in case you were interested in the diagram. Warning, it is over 0.5 MB:

http://www.flwse.com/images/steve/En...32A2Engine.jpg

Beiruty

Best Estimate of Time or Arrival. please.....

Austin519

"to the experts:...does it make sense that if you increased the size of the intake runners that the computer would sense the need for more fuel hence making more power...
my thought s again are a plate that goes on top of the runners that mirror there path increasing there size ...any thoughts??? certainly a 5 min. bolt on"

Uhm...no that doesn't make sense...because if you inject more fuel you're messing with the combustion ratio of ...1:14.7 is it? In which case you may actually get less power...and have a lot nastier exhaust...

Austin519

scalbert

Stoichiometric is 14.7:1 Air/Fuel ratio which is ideal for current gasoline emissions. However, this is not ideal for power. The manufacturers shoot for 14.7:1 AF at idle and cruise and richen it up at high throttle inputs and loads. Most current cars make the most power somewhere between 13.5:1 - 12.5:1 AF.

Beiruty

On www.AccordV6.com They are reporting that the UNICHIP ECU Enhancer would add 25-40 HP on all the rpm range by Dyno Tuning.

Anyone Tried to have his CLS Tuned with UNICHIP.

From the improvement in performacne gains, I see it has to do with Ignition timings. I could be a sensor or a mechanical....but it has to do with the ignition timmings.

BDI

I thought we couldn't chip our cars.

BNut

Its not really a chip but a programmable ECU replacement.

bioyuki

Thx for the pic...I've been looking for it and nobody had it...

kchen

Any update ????????????

NighthawkBlack

So what was the release date again?

typeR

scalbert i wasnt suggesting to increase the length, of the runners rather the diameter ,via a plate made to mirror there path of the runners ,that would fit on top of the intake manifold than the gasket then upper cover..???more air computer adds more fuel = more power similar to if the runners were extrude honed.

evolaerok

Ah! The wait is killing me!

scalbert

You could increase the diameter but I couldn't say that you would gain anything. The individual runners in both the upper and lower manifolds are at least 1" diameter which is plenty, IMO.

Extrude honing bothmanifolds would probably yield something, how much I don't know.

typeR

now see i thought i might be refering to what im describing incorrectly...when i say runners im talking about those little curvy channels just under the first plate, each with a hole at the end i meant enlarging those

juniorbean

iTrader: (5)

The release date is SEMA which is the first weekend in November. I doubt Tim will really be able to put up too much information before that date.....

DEEZNUTZ_RENAMED

It still feels so far away... I can't wait..... This is the only reason to convince myself on getting comptech headers and mugen exhaust.....

kchen

Any latest newS ??

snook789

Yes, I should have the sample and write up on the site before SEMA

Dimka.m

When is SEMA?

Shyne

huh, huh you said "sample..." damn I cant wait to find out what this thing is...Shyne

Jessie888

Count me in.

BirjuP

Count me in on this mod also. I cant wait for this weekend!

ruvz

So Tim,

Where is it?

BNut

SEMA doesn't start until Oct 30 or the 31 and ends around Nov 3 I think.