Post your ITB Setup

[esonefour]

Been 1 year off the road , hopefully will be started next week.

[David 23]

Really nice!

[1ricardo]

Dear Friends / ITB gurus

I'm installing a Jenvey ITB with a fueltech FT500 on a 3.6 engine, and a have a few questions regarding this installation

1-) Where could I install the Air Temperature Sensor, since I'm not using an air box and my filter is too small ( tea strainer type) to install this sensor?

2-) I made some 6mm threads to install a vacuum port on each cylinder, where each vacuum port will connect to a vacuum manifold, so my questions are:
2.1-) My manifold have 6 6mm inlets and 2 12mm outlets, is one 12mm outlet enough to drive the brake boost?
2.2-) Is the one way valve on the brake boost enough or do I have to install a second one way valve and perhaps a vacuum accumulator of some sort?
2.3-) on this other 12mm outlet, can I attach a idle speed valve? or it will disturb the vacuum and consequently ( the MAP, the brake boost, etc) when it open to allow air to pass by to hold the idle?
2.4-) The car will not have an A/C system, so is the idle valve control necessaries?

3-) Regarding the fuel regulator, my initial idea is to install the original FR that came with this 3,6 engine
Will that work? This Porsche FR is a little bit different, it have 2 inlets (one for each bank of cylinders and one outlet to the fuel tank)
If this fuel regulator does not work what are the other options? I saw a lot of fuel regulators that have a manometer on it, my preference is not to install something like that since i'm trying to go with a clean look and not a race look for this engine bay

Thank you all

[billjam]

Ricardo,
There will be other suggestions, but this is how I setup my ITBs on my 3.6 and it all works fine except IACV, which I have found that I don't need anyway!

1. Inlet air temp sensor is mounted on a bracket that also supports the fuel regulator and is situated above the engine near the throttle bell crank. There is so much air passing through the engine bay that it really doesn't matter where you put it as long as air passes over it.

2.1. My brake booster takes its vacuum from six 6mm ports and works fine.

2.2. I am using the original one way valve with no additional vacuum tank except for the small box that acts as a manifold. It works fine.

2.3. My ITBs each have two 3mm vacuum ports, so I used one set of six for idle control and the other set for vacuum to my ECU (MS3X) and fuel pressure regulator.
I never managed to get the IACV working properly with MS3X, so it is disabled and not used. For reference, when I disconnect the hoses from the IACV, revs rise to about 1500.

2.4. Do you need a working IACV? I don't. I don't have a/c and I don't live in a cold place. Engine always starts OK, but idles a bit low for the first minute or so (4-500rpm).

3. I am using an aftermarket FPR with a pressure gauge (useful), but only because the original one wasn't working. It still has a connection for each fuel rail.

I hope this helps.




Numbers = hose size.

[motley911]

Originally Posted by esonefour

Nice - and hopefully you'll have it ready for the NZ summer. Who is the manufacturer this set-up?
Cheers,

[1ricardo]

Dear Billjam,

Thanks for the info, It helped a lot, one more thing, what is your solution with the oil tank hoses?
I know that the big one on the body of the tank goes to the breather on the crankcase
The one on the neck is a vent, that usually goes to the airbox, but now that i don't have an airbox, what to do?

Thank you all

[acme911]

Originally Posted by 1ricardo

Dear Billjam,

Thanks for the info, It helped a lot, one more thing, what is your solution with the oil tank hoses?
I know that the big one on the body of the tank goes to the breather on the crankcase
The one on the neck is a vent, that usually goes to the airbox, but now that i don't have an airbox, what to do?

Thank you all

Oil Catch cans link:
can I see oil vent catch cans

Regarding your FPR. Most ECU's in conjunction with ITB's require a set PSI. I have Jenvey's controlled by an AEM Infinity. If memory serves me the aftermarket FPR is set at 41psi. Contact your Manufacturer to be sure. Or it might be in the install literature.

My Current setup is on page 11 of this thread: Post your ITB Setup

Prior to my current custom setup I ran a set of Triumph ITB's with tea strainers and the IAT sensor closer to the engine surface.
If your car is street car. Look into some foam socks to slip over the stacks. The Jenvey's are little jewels and you'll most likely want to keep a lot of particulate matter out of there. Also with my current setup I began to monitor Ambient air temps by temporarily relocating my IAT sensor. The old position was subject to heat soak. While my current position is dead center of my manifold TEE. Very satisfied with this arrangement. You might consider mounting yours in one of the rear stacks so it will not be seen. Some have mounted it in there intake manifolds below the ITB.

One last suggestion is that you may want to start a new thread on your set up. It would be more apt to have replies from the great wealth of builders on our forum.

Best of luck with your build!

[IS300]

Originally Posted by esonefour

Been 1 year off the road , hopefully will be started next week.

yes what set up is this

[RobWeiss]

Looks nice Ricardo. I finished my Jenvey install last fall, so this is all very familiar. Like someone suggested, I mounted the IAT sensor out of sight on the back side of the velocity stack. I epoxied a piece of metal to the stack and then drill/tap.



The FPR is aftermarket and mounted directly to the fuel rail outlet, with a gauge. Hope this helps.

[1ricardo]

Dear Acme 911 and Rob Weiss, thanks for the feedback!
I'll follow the suggestions and move forward with my assembly, I'll post pictures later on
By the way Rob, what was your solution on the oil tank vent and where did you bought the FRP?
Regards to you all
Ricardo

[acme911]

Ricardo, Here is a link to FPR’s: https://www.summitracing.com/search/part-type/fuel-pressure-regulators?SortBy=Default&SortOrder=Ascending&tw=Fuel%20press&sw=Fuel%20Pressure%20Regulators

[onboost]

Originally Posted by David 23

The engine build and management system is by Rasant Products in Southern California. Cam is GT2 Evo with 108 center. Pauter rods, 10.5:1 CR. I don't have the ITB size at hand, I'll look for it.

David, Thanks for sharing those details! I;ve got one of theses I'll be putting together as well using the Rasant system along w/10.5:1 CR, TWM ITBs, twin plug, etc.. pretty much have all the parts except the cams.. hence my question.

We've used the GT2 Evo cam on a couple of occasions, but they were in Turbo applications, and don't remember the lobe center though I don't think it was 108.. typically ot moved the power band upwards for more top end.

What are you looking for with your set-up?


Thx

[RobWeiss]

Originally Posted by 1ricardo

Dear Acme 911 and Rob Weiss, thanks for the feedback!
I'll follow the suggestions and move forward with my assembly, I'll post pictures later on
By the way Rob, what was your solution on the oil tank vent and where did you bought the FRP?
Regards to you all
Ricardo

Ricardo,
The oil tank vent is routed to a breather. I plan to install a catch can eventually, but it’s working fine the way it is.
The regulator can be sourced from several suppliers. Here’s a link to the one I used. They sell an adapter fitting to mount it directly to the fuel rail. Also, I had to use a 90 degree fitting to orient the gauge where I could read it.
https://www.aeromotiveinc.com/product/efi-bypass-regulator/

[esonefour]

IS300 , Motley911 it's a Jenvey large bore 2 bolt kit , I got everything anodized and coated in black.
Just received an order from hilborn injection, synchrometer and some black dust covers , will probably sell Bills covers.
Injection loom and cop loom almost completed should definitely start for the NZ summer

[PhillIB]

I thought I would add some pics of my ITB installation.
Basically it is Triumph 955i throttle bodies on manifolds from DanST Engineering with trumpets from the same. Home made air filters. Home made linkages based on the closed course Motorsport idea. Megasquirt2 ECU.
You can find the full threads at ImpactBumpers.com

[mikedsilva]

Looks great!

[Raceboy]

GSXR1000 throttles, BMW E46 M3 throttle motor, custom fuel rails, custom trumpets, EFI and electronic throttle actuator controlled by VEMS (used BMW E46 throttle pedal).

[pampadori]

I like the throttle by wire setup twist on the ITB setup! Makes traction control easier.

[Clay.0]

Raceboy- nice setup! I’ve been looking into the e46 motor controller for another project. Mind sharing any info on the wiring? AEM Infinity can also control these.

[Raceboy]

I went electronic throttle route due to not liking the idea of long throttle cable. Since my car was heavily modified by PO it did not have it at all and I thought it would be easier to use ETC than figure out cable setup and routing. With LSD and ~200rwhp from my 2.4s I don't think traction is problem with 911
Wiring is easy, actuator has regular BMW TPS mounted (like M50 engine has) and then just 2pin JPT connector for motor. It is controlled by H-bridge which my VEMS ECU has built in. From throttle pedal there are two PPS (pedal position) sensors, on is for main load, other is for error correction and finally TPS on the GSXR throttles. So total of four position sensors and also safety relay for throttle motor (for instances where pedal target differs too much from actual throttle angle. In case of error it just reverts to default position (meaning idle).