THSCC Forums

Those are my new Fuji Racing IRTB's, straight outta Japan. I finally got all the sensors and wires worked out and fired it up today. It idles rough as shit but I just need to synch the throttle bodies.

Only problem is all I can do is rev it up sitting on jackstands, I still dont have a new rear end yet for it

_________________
02 Focus SVT
STF 9

Translation: It's JdM yO!

_________________
2001 Honda S2000 - SOLD
2012 Boss 302
2003 BMW 330i

tOyO!!

I thought George recommended you shave your rear end??

_________________
Silver Honda
Green Ford
Blue/White Suzuki
Red Triumph
Grey BMW

"Never let life be shaped by fear of its end"

No, you're a towel!

That is mucho cool looking. Is it running off your stock computer or do you have an interface? Do you have a filtering plan?

_________________
RedLanternRacing, builders of the fastest cars in last place.
Success is not an option.
1981 Scirocco, "Vera"

_________________
Has no responsibility whatsoever.

Congrats! I can't wait to see it in person.

Best,
--Ashraf

I run Megasquirt 1 V3.0, full fuel and spark.

_________________
02 Focus SVT
STF 9

Very nice looking Ryan. Will be very interested to see it in person.

_________________
2010 Honda Fit Sport
Couple of bicycles

Very cool Ryan. What is the red block with the red wires coming out of it?

_________________
Todd Breakey
STS 42 - 1992 Sunburst Miata
Dammit!
"You souldn't play leap frog with a porcupine. You might get hurt." - Eliza

If I follow this layout correctly those aren't wires. I see a polished aluminum piece sitting next to the red/yellow/black wire bundle. It looks like an AFPR. Feeding into the red block. Which appears to be a fuel regulator/splitter and each red tube coming out is an individual fuel line going to each TB.

Cool looking setup Ryan. Looks like the old Mikuni side draft setup, only nicer. I hope synchronizing those 4 TBs is easier than it was synching up the Cuda 340 6-pack. I never got that to idle smooth. But it ran like mad.

Is that an underdrive pulley on the crank or some requirement?
So this system uses MAP?
You program fuel and spark delivery from your laptop to setup the MegaSquirt?
What type of filters or filter are you going to use for the TBs?
Are you running a header?
What is the hp/tq gain and how is the power curve compared to stock?

_________________
http://www.greywinds.com

That is the IAC (Idle Air Control) block. Basically it takes air and injects it behind the throttle plates at idle.


Bssssttt! Nope nothing but air in the red lines. You did get the AFPR correct but that is just a shared vacuum line.


Unorthodox Underdrive Pulley


Yes, sorta. Before the IRTB's I used the Megasquirt in Speed Density Mode (MAP and RPM). Now after some research it seems that running my setup as Speed Density isn't gonna play nice with my IRTB's. With the about 15% throttle I will see 800 mmHg, only leaving me ~60 mmHg for the remaining 85% of throttle. Not enough resolution. Luckily the new manifold has a 0-5v TPS sensor so I can convert to a Alpha-N (TPS) setup. The Megasquirt also has a new Hybrid Alpha-N mode that blends the MAP with the TPS for the best of both worlds.

Yeah, I was confused at first too. Speed Density looks at MAP, RPM AlphaN looks at TPS and RPM. I can post the alogarithm if there any super nerds out there.



Yup I have a DB9 cable that plugs into the side of the Megasquirt box. I tune via a free program called MegaTune.


I don't know just yet. Pipercross socks fit over the horns and the place I bought the kit from has a filter screen the clips to the horns. I also am looking at this http://www.racetep.com/ramflolynx.html#Neck

The only downer is that filters kill the power a bit.


Yes, I just re-installed the repaired Racing Beat 4-2-1 header that broke at VIR last year. Those welds better hold Jason!


Good question. Im hoping and praying for between 120-130whp. Or a pick up of 13-23 hp from what it dynoed at last spring. Im also hoping that I have less instructors in cars Im passing complain about how long it takes me to get by.

Ahhh the power curve. This raison d'etre of IRTB's. The power is supposed to be almost instantaneous. The shop I bought this from has a car that dyno'ed at 130 whp beat many a superchared miata to the first turn at Pro Solo's.

Here is a video of a CSP legal miata on drag radials laying down a 14.0 run. http://youtube.com/watch?v=JAn-HdpGC-0

_________________
02 Focus SVT
STF 9

Here is what the megasquirt and the Mazdaspeed diff did at Sanford in November. In anticipation of the Torsen arriving, I got the old 6" diff out of the car today. Here is what I found:





Im gonna take a guess that it was the Pinion gear, not the ring gear that broke causing the damage to the ring.

_________________
02 Focus SVT
STF 9

Pretty neat. I would not have guessed that was the IAC but it makes sense.

You need another red pulley and 2 blue ones. That way they will go with the color scheme. Let's not go half pimpy ok...

Using a mixture of MAP and the TPS is a proven method. My 92 LT1 Vette used that. They later went to MAF.

So you can run the DB9 cable into the car to a laptop sitting on the passenger seat? Then see how it looks while under load going through the gears?

The RamFlo looks pretty good. 300cfm/filter. 1200cfm of total flow. Can your intake/heads/cam use more than that? I don't think I'd want that car running wide open on track with no filtering at all. It might get you a few ponnies but you're leaving the intake valves exposed for really bad things.

I happened to see this article about Gibb's Miata that uses the IRTB. He has a custom intake covering all the TB that runs to the front of the car. So he's get getting cold air and possibly some ram air effect. That might be an option for you. See page 3 of the article.

www.cardomain.com/ride/350414

15-25whp is a nice gain for a car that rates at about 100hp. A flat power curve that comes on quick would be a big win.

PS: Passing problems on track. I have no frame of reference to this concept.

_________________
http://www.greywinds.com