ITBs with Water Injection vs CTR Intake Manifold with Spoon Venturi 70mm TB

[Escabar]

Hi guys,

I recently parted out my turbo swap and wanted to try something a little different in the NA world. I had loads of fun with the turbo setup, but someone made me a great offer for everything, so I have started over and want to enjoy the EK9 doing what it does best. I have a high compression build with cams and was wondering if I would be able to install a set of ITBs and have it work with my Snow Performance Water Methanol Injection kit? I have done extensive research on these and I am total satisfied with the gains to be had in mid and top range as well as the increase in torque output. If it can be done, how would I go about doing it. Or should i just stick to my CTR Intake manifold and Spoon Venturi Throttle Body? The water injection is going to help me out alot in terms of minimizing or even preventing detonation at peak torque levels, and so with my compression being high, and running this on pump gas, the mixture will come in handy. Here is my setup:

Built 16a Head with Ferrea Valvetrain, 3 angle valve job, port and polish etc
CivicType-R intake manifold and Spoon Venturi 70mm throttle body
Skunk2 Pro 1 cams and cam gears
B18C5 Type-R short block with CTR pistons and ARP rod bolts
Hytech Replica Big Tube header
GSR box with 4.7 M-Factory final drive
Hondata S300

P.S- The car will be a DD (well not really driven everyday, most on weekends and the occasional drive to work 2-3 times a week) but it will also take part in the occasional drag meet (2 or 3 times a year).

 

[sek2dts@aol.com]

i wouldnt go the methanol route n/a. the work and money required to get it to work is not even close to worth it for the gains if any you'll get. i can see being able to advance ignition timing more in the higher rpms when your using a methanol mix but this is far from practical for street use. the right way to do it would be a secondary fuel rail on top and a serparate cell,pump,lines for the water methanol mix. your better off with a manifold and single throttle body or a set of properly size itb's. i have seen your idea used on n/a drag cars with 14.1+compression engines but for your setup and for street use it doesnt make much sense.
heres kinslers setup that people are starting to use for methanol injection on the drag motors.
stick to a manifold and throttle body for your setup u should be in the 200 wheel range with what u got.

 

[chet baker]

werd ^^ For a DD I don’t think I’d do it ….but I do like a challenge ,LOL
Kinsler Injection makes some of the most well designed ITB available in the world. It's great to have them spend the time to produce a setup for the D-series and F-series engines to .

 

[jugbugz]

Its quite an expensive upgrade and in my opinion its the final iceing on the cake.

One things for sure is, your gonna get some serious throttle response and Vtec sound!

 

[Escabar]

So should I leave it out and stick to the CTR Intake Manifold and Spoon TB or should I go through with it? Is it worth the money? I already have the Water Injection, as the compression will be fairly high for pump gas, so I will definitely be using that. What I am trying to decide is if i should go with the ITBs or just stick with the conventional setup.

 

[chet baker]

You’re going to need some serious tuning to run them on the street.
The cost of this may out weight the purposes ......but they do sound badass

 

[sek2dts@aol.com]

So should I leave it out and stick to the CTR Intake Manifold and Spoon TB or should I go through with it? Is it worth the money? I already have the Water Injection, as the compression will be fairly high for pump gas, so I will definitely be using that. What I am trying to decide is if i should go with the ITBs or just stick with the conventional setup.

90% of people that want itb's dont really know what there using them for and dont even know how to size them propery. im not discouraging u from using them but really for your 81mmx87mm setup u can make the same power using a manifold instead of itb's. sure properly sized throttle bodies is gonna give u a fatter torque curve but is it worth $2000 + dollars? if your gonna drop 2k on something drop it into a larger bottom end not on a part like itb's which is really that last mod u should be doing on a n/a setup. i really wouldnt even waste putting your methanol setup on either your just complicating a simple setup. you'll be fine on pump gas you just got to lower your ignition timing values alittle. why waste your $ on all this when u can make the same power on a single throttle body and manifold.

 

[Escabar]

90% of people that want itb's dont really know what there using them for and dont even know how to size them propery. im not discouraging u from using them but really for your 81mmx87mm setup u can make the same power using a manifold instead of itb's. sure properly sized throttle bodies is gonna give u a fatter torque curve but is it worth $2000 + dollars? if your gonna drop 2k on something drop it into a larger bottom end not on a part like itb's which is really that last mod u should be doing on a n/a setup. i really wouldnt even waste putting your methanol setup on either your just complicating a simple setup. you'll be fine on pump gas you just got to lower your ignition timing values alittle. why waste your $ on all this when u can make the same power on a single throttle body and manifold.

Thanks alot. When you put it that way, I will abort the ITBs and stick with the 70mm TB. I already have the Snow Performance kit, so its not additional cost. The water methanol injection kit will allow me to keep the car at stock ignition or even advance it a bit on the shitty pump gas (91 octane), so it won't be sluggish even on the streets.

 

[sek2dts@aol.com]

Thanks alot. When you put it that way, I will abort the ITBs and stick with the 70mm TB. I already have the Snow Performance kit, so its not additional cost. The water methanol injection kit will allow me to keep the car at stock ignition or even advance it a bit on the shitty pump gas (91 octane), so it won't be sluggish even on the streets.

no problem and good luck with your build and if u go to the dyno come back here with a graph so all of us can see

 

[Escabar]

Sure thing. You guys will be the first to know. Thanks for the encouragement though.