ITB's? looking for some info.

[jesseealexander]

i know its been a while since i have posted on here, but i recently traded my e30 for a 97 montego with a hardtop. :banana:


anyways, im looking into making an ITB setup for the car and i think i have a pretty good basic plan for it, but i need a little info and have a few questions about it. my plan is to use gsxr 600/750 throttles and a small section of the stock IM as a flange, with a plenum so that i can still use my stock MAF. the main question i have is about injectors. will i need to use the gsxr injectors or the stock ones/rx7 units in the stock miata manifold.

any help/info/tips will be greatly appreciated. :clap:

[MoD_Scotty]

If you leave the injector ports on the section of IM you're using, you should still be able to use stock/RX7 injectors. That seems to be way easier than trying to use GSXR ones.

[wildfire0310]

Well if iirc the 1.8 head has the injectors in the head so you be using the stock injectors.

Also it is common/ the cheap way to cut a stock intake manifold and use it as the base. The cheap way is to just clamp them together but he correct way would be to weld he itb to the manifold/ flange

the idea of using a plenum and the stock maf should work but it won't be as easy as just going standalone. Also going standalone will make it easier when dealig the the throttle postion sensor.

Foo should be able to help more.

[Stealth97]

Go standalone first. Doing anything more than basic N/A mods without it is just silly, and bandaids are just that.

[FooSchnickens]

Indeed. Get a decent management setup and go from there. You may find that having that adjustability is all you really want/need.

[jesseealexander]

^^ yeah, but i like the idea of making them and having something like that on the car, regardless of the initial performance increase. the plenum/stock MAF is more of something i want to say that i made it, and it works. if it works, i can start making more and selling them too. plus it wont cost me any money so its all good.

a good management setup will come, but because of the price it will be a while. has anyone ever used safc or anything similar on a miata? id rather use a piggyback if at all possible. i plan to swap over to rx7 injectors when i get it all on the car.

[miataspeed69]

dont do it its more truble than you want why make something that you have to tune every who knows when, when what you have works fine.

[FooSchnickens]

You'll never be satisfied with a piggyback. Period.

dont do it its more truble than you want why make something that you have to tune every who knows when, when what you have works fine.

Yeah, nevermind the fact that I've been running fine on my setup for two years without any trouble and can even pass emissions! Oh, and don't forget Peter who's had them on his car even longer than mine. Get your facts straight before hopping on the misinformation bandwagon like everyone else out there.

[Jack-MX5ATLanta.com]

I think you'll be asking for headaches when you put this on without any engine management. Mike used an S-AFC back in the past and I think you may be able get some use out of it, especially for the price of 'em.

[metalman]

The round wheel is 'dated' and 'old', perhaps if its reinvented to square or octagonal....that might work. :lol:

[FooSchnickens]

Ohhhh, octagonal.... You have my attention.

[jester911]

I was thinking triangular.

[Bernie]

Okay, I'm going to try to say this without sounding like a total dick, but what is the draw of ITBs aside from cool sound, retro, and something different? I'm no guru, and haven't taken the time to research it, but they don't seem to be making a shart-load of power, and they seem sort of finicky...

[metalman]

cool sound, retro, and something different...(they) don't seem to be making a shart-load of power, and they seem sort of finicky...

You answered your own question. :lol:
Add also 'throttle response'.

However regardless of all that debate, theyre an aquired taste and thats kind of a different subject from "I am cobbling some **** together without engine managment" :D

[jesseealexander]

i think i might just man up and try to buy MS used from someone... unless theres some way you can delete the MAF and TPS using S-AFC or something of that nature.

[JDM88]

I think I saw a used MS over on Miata Turbo.net for sale.

I spent absolutely ages weighing up all the different options before I coined up for my one and I'm glad I did. I nearly went with the SAFC but then I realised that all it can do is the A/F tuning, which meant I would have to pick up something for the timing and then I would only be limited to stock injectors. The number of band aids needed adds up with the more stuff you do, and it really doesn't work out any cheaper and it definitely doesn't work any better.

The MS is right up your personality alley too. You'll love it.

[wildfire0310]

i think i might just man up and try to buy MS used from someone... unless theres some way you can delete the MAF and TPS using S-AFC or something of that nature.

Nope. To use the safc you'll need both the tps and he maf as all it does in interset the maf signal and change it.

[fun02se]

look at Fugi Racing web site and call Jimmy for correct info on IRTBs!

[metalman]

look at Fugi Racing web site and call Jimmy for correct info on IRTBs!

Call Jimmy for 'correct' info?? :lol: Surely you jest!
He'll have you thinking your ITB car will outrun anything
on the road and put down 200 hp. haha...

[Stealth97]

Call Jimmy for 'correct' info?? :lol: Surely you jest!
He'll have you thinking your ITB car will outrun anything
on the road and put down 200 hp. haha...

He might not say you'll make 200hp. Last I heard he does not believe in dynos anymore :D

[jesseealexander]

Call Jimmy for 'correct' info?? :lol: Surely you jest!
He'll have you thinking your ITB car will outrun anything
on the road and put down 200 hp. haha...


you can easily make 200 hp.... with a bored/stroked/cammed high comp motor :lol: