RBS14

here's what I've been working on the past couple days. They're all done and ready to go on my S14, except for the fact that I don't have my standalone.













Bet ya havn't seen that before eh? haha

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Ritz S14

Looks sweet. What's the approximate HP gain on that?

ThatGuy

Completely Awesome!!!

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SlideStar

" OooAhhhhh " Thats some nice work!
Lets see some pics when it's on the car! And a dyno sheet would be sweet too!

blu808

I like it. All motor. Scott this will be very drivable with usable power if it is tuned correctly.

I have a hook up on haltech if you are still looking.

Give us some specs man. Brands sizes.

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eyustfu

nice set up..what did the itbs come off of btw?

skatanic28

very nice.

hard to tell from the pics, are the bends smooth between the itbs and runners?

what are you doing for airflow metering and a filter?

S14DB

Did you port match the ITB's to the Mani. I think you're going to run into some flow problems.

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Comments should be taken as Opinions not as Statements of Fact

RBS14

haha sorry.

'03 GSXR 1000 TB's. Secondary butterflies removed. Stock S14 intake mani, runners chopped off.

Luke, thanks for the offer, but I'll be using a megasquirt. I'll be sure to post vid and dyno charts when they are on the car.

Yes, I filed out the runners to match up with each TB. Pics make the bends on #1 and #4 look tighter than they are.

Run into flow problems with ITB's? hahahahah

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Tygma

Details? that shit is awesome...

2JZGTE

Badass

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R35 GT-R, R32 GT-R, Supra, S13, S14, FD3S

-E-

fuckin sweet

SilviaDriver

my brother was doing this to his GSR then later decided to sell it and do turbo but dont u think those are a tad bit too small?

RBS14

no, actually they are a great size for our engines. They are within about 2mm of the diameter of the stock intake manifold runners, which is great. If you were to use TB's much bigger than these, you would have issues with vacuum. Most aftermarket ITB's for 4 cylinders use TB's between 40mm and 45mm. The ones I used are 43mm.

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AlligatorBling

mad fucking props to you my man. dont hold out on us, keep us updated on this project, i have been thinking about doing that from day one with my KA.

SilviaDriver

most 4cyl use ITB around 40-45mm but for wat size engine?

ITBs can be found all over the honda world and they are 1.8L as we know. most of the time they use 45mm minimum for ITB. we are 2.4L. some honda people use 48 and even 50mm for a better top end.

a 43mm used on a 1.8 is mid range goal. your using 43mm on a 2.4 thats y i said "isnt it a tad bit too small?"

what is your power goal?

MakotoS13

you are a MADMAN and i think i wanna know WTF the gains are on what appears to be insanity!


ROCK!

RBS14

those guys who use TB's bigger than 45mm cant hardly idle because they are so big. They also make NO low-end power. I'd like to keep a *little* low end power and torque below 4k. I can also change the characteristics of the TB's dramatically by simply changing velocity stacks. I could have gone bigger but these TB's were only $165 shipped, as opposed to $1000+ for bigger ones. I'm too poor to spend that kind of $.

Power goal? as high as I can.

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s13irdie2

thats insane!!! keep us updated.

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1990 s13
IslandMotorsports, Inc.

s14falcon

So awesome!
see, now this is what we need to be seeing here on the forums.
keep up the good work man.

SilviaDriver

1. I've seen 1.8L engines make 15whp in the midrange 4.5-6.5k. 6-9whp up top. This is on 45mm ITBs!

2. They idle just fine

Low end is 4k? isn't your redline 6.5k? Your definition of 'low end' is actually 'mid-range'.

You wont be able to change your ITBs characteristics to have more 'top end' b/c of the 43mm throttle plate. By adding a velocity stack, your gains will be placed even lower in whole rpm band.

Again, your ITBs will be too small for a 2.4L engine.

PS: this is SilviaDriver's brother (a honda owner)

atom

It's not that crazy, home made ITB's have been the hotness on Honda's for probably about a year now, if not more.

And saying a 45mm can't idle is just wrong, the TWM setup on Honda's are all 50mm or bigger and they don't have problems idling.

Just one quick question, any reason you aren't using the injector mounts on the TB's?

Dousan_PG

cool deal scooter
but still will be slow as fuck
hahahahaha j/p bro

good luck
whats th eta to get this running? 2 years? GET A JOB!! hahahaha

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SilviaDriver

atom hit the nail on the head. The honda world is extremely seasoned when it coems to ITBs.

BTW, using the GSXR injector locations will aid in better fuel atomization and give you more power. An injector position too far away will lead to idle problems as fuel will 'puddle'.

Props for trying it but you're going to be disappointed.

RBS14

I'm not going to argue with you (silviadriver) and/or your brother. I think these will be just fine for the ka. They have been used with great results on sohc's, so I don't see why it won't work on mine. TWM doesn't even make a kit for this engine, and the kits they do make are $1500 and up. I did this whole thing for $250, with stacks. I'd rather save a thousand+ dollars than get an extra 5hp up top. I guess you could justify paying that, but I can't.

Thanks for your input tho. I just don't happen to agree with it.

Cheers!

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FRpilot

if driftaholics high comp ka lived, i would have liked to see these on his car..

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240silvia

SilviaDriver

No one is really arguing. This is a discussion. Have fun.

SilviaDriver

So, what do you not agree with?

50mm ITBs idle fine.

45mm ITBs are seen to gain midrange. More so than high end. (1.8L)

that180guy

that is fucking BADASS!!!!!

cant wait to hear a sound clip man
gotta love the na, turbos are for pussies

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