i'm not considering this myself, but i've been wondering for a while. DIY ITB's have lots of technical info here, but little to no data on the improvement it made on the car. when i say "car" here, understand, the topic is for "street cars." anything that does not serve most of its time on the street does not apply here. i'm interested in how different combinations of engines, with their varying levels of modification, compare to each other with similar or dissimilar tuning and other mods.
of course, engines tuned with high-end standalone management will perform better and will be simpler to drive, as they can warm themselves up as needed and idle more easily. however, i'm more interested in those using hondata, uberdata, or an S-AFC or similar. the cheaper tuning.

include the engine and mods, then the tuning device(s) and method, ie wideband on the street or dyno or "i'm retarded i just tried to run it." then include fuel economy, peak power, power delivery (low end and midrange and top end), driveability (warm up routine is longer, won't idle right, etc.), and any other observations you have concerning tuning.

i may be interested in a project like this in the future, but mostly, i want to know if DIY ITB's have become like race headers, where you no longer need a completely built motor to take advantage of the gains. you must have some serious mods, but many street cars will see gains from a race header, and i know a lot of you use them. sure, you'll see more gains from a better motor, but will you still see some power? or is the throttle control what makes it worth it and there's no power gain? or maybe the better midrange? let's see, so post what you've done or have.

 

bump

 

I tuned a local guys car. Search rice4life. It is bested tuned in alpha N, we used crome to tune it, runs real smooth, but takes some tuning.

 

how many hours did it take to tune w/ wideband?

 

I tuned open throttle on the dyno and on the street. I tuned uberdata and crome on the dyno in 1 hour. And he tuned the part throttle. So I would guess around 2-3 hour complete tune.

 

i had mine tuned at jeff evans shop, with neptune, and after gettin alittle use to it , i really liek them, great throttle response, if you floor it gas milage goes down a bit . .

my car sounded stock when driving, loud as hell when floored and loopy (with big cams) at idle, it was fun . . .

i had a 2.0 with gsxr 1000 itbs, i had a wideband and it did get lean for a sec, if i let off the throttle for a sec, and it took a half a sec for the a/f to stablize when i touch the throttle with randomness. . i liked it alot, i cannot comment on power too much because ive only had the build 600 miles and it always had the itbs on it, but the motor ripped at about 6ish and up

when starting up hold the throttle for a good 5 or 6 seconds, then its good enough to let it go, warm up was fast( in 40-60 deg. weather, i only had it a week) , i had none of those shitty emissions or coolent flow sensors

 

mine always ran fine even when cold..but i do let it warm up a nit before i go ..like a min or so

 

machine, you back to running them? or still going manifold. i'd be interested in your setup. also, did you make power? i know most of you dyno tuned, so how was the gain? or no dyno w/ manifold?

 

the new motor goes in on the weekend if the weather is nice ..i wont see a dyno for a few weeks atleast
but i will keep an update goign

 

thanks. anyone else?