ITB's for my ka24de finished. *pics

[scruffy63]

http://www.rpw.com.au/Photos/Q...p.jpg\

maybe something like this filter is used.

[SSS]

After seeing this thread, i went ahead and picked up some `02 GSXR 1000 ITB's for my fwd U12 Pintara (Stanza) KA24E, as originally i was going to go with a custom design of my own, but i deemed machining costs were going to cost me too much compared to the $150 USD ($200 AUD) i paid for them. However i am going on a slightly different path to attaching them to the modified intake manifold, as these ITB's will be going to see boost soon.

[PandaS14]

S13 Charlie: yea, people on zilvia are retards. I just posted it there to show all the idiots there what's up. But according to some idiot, these TB's are gonna "choke". ahahahahahahhahahahaha

Filter? here's what deviousKA is running.

With the velocity stacks i'm going to be running, I'm not going to be able to run individual sock filters, so I'll probably end up running it too.

SSS: sweet man! yea, have them welded on or make a custom flange to weld to both the mani and tb's and then bolt them together. either would work great. Yea, I paid $165 USD shipped. good find.

[Ace 2.0]

how well will the ITB's respond to boost,this is a really cool idea!!!

mad prop to every one who has them!!!!!!!!!!!!!

[PandaS14]

if you welded the tb's onto the mani, it would be AWESOME for boost. Would flow sooo much and give incredible response.

[SSS]

How did you guys attach the TPS on the itbs? also, did you guys use the stock suzuki throttle pulley or the OEM nissan tb pulley?

[PandaS14]

we're both using the gsxr TPS and gsxr throttle wheel/pulley.

[SSS]

thanks panda, i might have to see if i can come up with a creative way of using the oem tb tps, otherwise buy the suzuki one off the wrecker i got the itbs from.

[IveBeenBad]

how would you boost with ITBs? Have a big collector that would basically look like a sheet metal manifold?

[PandaS14]

build a plenum around the inlets.

[mackdaddy240]

That is beautiful..... I never would have thought to use sport bike ITB's ok now that I know it can be done, where did you get the stand alone for so cheap? I'm seriously thinking of doing this. I already have most the mods I can get under the hood including high compression, and I'm trying to be able to keep up my buddy and his damn turbo civic and its just not cutting it. So if you could send me a link of how this was all put together because I dont have much experience with this, I would love you forever. Have you made a website yet? If you havent and you want to send me detailed directions and pics I'll make a site for you so other 240 fanatics can see how its done. Thanks

[PandaS14]

the ECU is called MegaSquirt.

First you will want to start off at: http://www.megasquirt.info/

That has all the basic stuff you need to know as well as all the instructions.

If you are building it yourself you can get everything from: http://www.glensgarage.com

gotta hand credit to deviousKA, he turned me onto all this stuff.

[j-z]

what kind of gains should one expect to see with doing just the itb mod alone while running with the stock maf?

[crzycav86]

You don't use a maf sensor.

That's the whole purpose of the megasquirt fuel management. It runs off of a map sensor.

And I just want to say good work everyone. The members in this forum are truly the NA 240 pioneers. Keep it up...

[j-z]

the way i want to run them is with the stock maf, so i dont have to spend more money to convert to a map. plus the maf will adjust automatically for the changes in air flow with converting to itb's. so... any word on expected gains?

[ShionS14]

thats the way i am going to run it, although you would get better performance using velocity stacks and a standalone. i think it would be great that way u can save money and do other upgrades later on like a z32 maf retuned ecu or us a safc plus you'll already have a plenum design to use boost later on

[j-z]

welp fellas, i gave in and im gonna be running itb's from a 02 gsxr 1000 that i picked up today for $100 (came with injectors and what not also). the only thing i see myself having trouble with is the tps. mine came with the suzuki one. i would like to use the suzuki one because its made for the itbs. i see both tps's (nissan and suzuki) are equiped with 3 wires. are these three wires common with each other? how did both of you guys get the suzuki tps to work on the factory harness if you dont mind sharing? also, is there like a common rule of thumb for plenum size with itbs?

[deviousKA]

Nice find on those throttles. The suzuki tps does not have an off idle "switch" like the nissan one, it is tps only. You may be able to get the tps portion compatible, you would need to measure the varying resistance of the two tps and compare. Most likely the the suzuki will not have the same range. I have no idea if new resistance tables can be written to ecu for tps, although id say its possible.

If your using a stock harness and ecu, your best bet will be the stock tps mounted to the throttles in some way.

[j-z]

ok, thanks. im glad you told me that. looks like ill be going with the nissan tps (alot less hassle).

[seansays2u]

so how is it running??!

[Chingon]

I don't want to sound like the zilvia guys by any means, but I did some research while contemplating this setup around 6 months ago (you know read the honda tech and vortex forums, along w/some intake manifold design pdfs) and your runners seem awefully short. Did you go w/this lenght because of the nature of the itbs (non-separable) or will you be revving to 9000 rpm?

[deviousKA]

Do you mean my itbs? The runner length is appropriate for the characteristics of my engine, and no the sohc that they are on is not a super high reving engine. You have probably noticed a lot of plenum intake manifold runner theory, with individual throttle bodies a shorter runner is optimal. From the time i had posted that picture of my setup, i have cut 1 inch off of the total runner length.

seansays2u, its still full blown winter here in northern idaho, not a lot of tune time so far. I am still finishing up my new fuel rail and regulator setup. There is no rush.

[PandaS14]

My tb's are coming along now too. All I need now are some velocity stacks and filters, should I choose to use them. I'm getting stock gsxr stacks for now, can't afford aluminum ones and an airfilter assembly to accompany them. I'll just run open stacks now, or individual sock filters if I can find them for cheap.

My main holdup at the moment is my megasquirt. I ordered it over 3 weeks ago and it still hasn't shown up. The guy I oredered it from usually takes 4-6 weeks to ship it out. that's what I get for buying from the cheapest guy. Then I still have to build it and wire it all up. Long ways to go. I'm in no hurry either. Although I don't have physical constraints (snow) like deviouska, I've got school, which takes precidence. I'll keep everyone updated tho, when I've got something useful to say. haha

I also scored some 370cc injectors from a friend for free! so I'll run those instead of stock ka ones, meaning I can run a lower duty cycle and don't have to swap them out in the future. I'll just do it all at once.

Gabe: long time no talk! I've been busy over the holidays. I'll be back on aim in a couple days, lets talk!

[deviousKA]

Yeah i heard something about glen getting all backed up on the megasquirt kits over the holidays. I got mine a week after i ordered it, sorry, hah.

Gives you more time to plan the overall setup , although lack of motivation can set in without parts to work with.

[Chingon]

no devious, my comment was meant at the original poster not at you. If I remember correctly your setup is w/in the 9-11 inch range no? That's what I came up to if I remember correctly after the 3rd or 4th harmonic bounce with a sweetspot around 5-7k rpm. It's just that perhaps the original poster was perhaps going w/boost on top of it all, that's why I asked.

[PandaS14]

no, I'm not boosting. Just regular n/a stuff. I'm making mine as short as possible so I can adjust characteristics with different stack lengths. If I made the manifold too long and wasn't getting the peak possible power, I would have to take it all apart and chop it down. With the shortest mani/tb combo, I can adjust with stacks, which is much more desirable in my mind.

[Chingon]

now that make sense..

[matt4pl]

ive been told that there is a company or something that sells ITB mani's for the KA? any clue as to where to find this?

[PandaS14]

nismo has a carb manifold fro kae's and some companys make ITB's that will fit on carb flanges. However, there is nothing for the de. anyone who has done it on de has done a custom one-off job.

[DrifterBoy240]

what did you use i am looking to do this to my 1991 240sx and i havent found anywhere to do it so i was just wondering how to do it thats all i think N/A is the best way to go some times (dependent on the car) i know that you have to use GSX-R 750 or 1000 TB's and the mega-squirt system but what do i do with my MAF, or do i convert it to a MAP?