Dec 20, 2005 - 3:39 PM | Forum: Engine/Transmission/Maintenance · Post Preview: #369399 · Replies: 16 · Views: 3,235 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
Like i said before, the goal isn't hp. ITBs are mostly used on peaky engines since they are usually oversized for the general application. My major point is that i'm using ITB's that will flow just a little more than stock manifold runners and that's it. They are not that large in size, and actually may be too small to make significant power gains. The stacks will act as the long runners, from the TBs and into the plenum. Nothing is oversized for this application, and i'm not seeeking any sort of gains related to top end. It's more like i'm building this intake system to top out at 6000rpm. I'm sure we can all agree the 7afe manifold can be better tuned to produce results, well i'm just trying to do that but keep a nice crisp throttle response. As for the tuning, the o2 sensor will be mounted a closer to the collector than the head. I've realized that flow will be a problem if it's too close to the head, but i don't have a spare mani to figure out where i can mount them without restricting too much flow. I also don't plan on putting on a header. This is just a rolling test bed for the intake system. Afterwards, i'll probably scrap it(or give it away) and move onto the 1zzfe i have. This is more of a learning experience for me and to test what has not been rarely done. This car is just a true daily driver, this intake system is just a test. It's not meant to be a performance mod per say, but to atleast help me(and perhaps some other) to understand things a bit better. |
Dec 20, 2005 - 11:08 AM | Forum: Engine/Transmission/Maintenance · Post Preview: #369321 · Replies: 16 · Views: 3,235 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
I think i've researched it enough to make a competent design. My ultimate goal isn't exactly horsepower, but more or less a smooth flat torque band. I'm using 38mm ITBs with long stacks to improve intake velocity and still maintain a good throttle response. I will be mounting them about 90mm from the head to keep response good, and use long tapered stacks to increase velocity. The plenum will be a box type, about 3 liters in capacity if i can shape it right. The shape i *want* would be a trapezoidal with the small end facing the engine. The stacks will lead in about another few inches inside the box. 38mm for the ITBs is a decent size for the oversquare 1.8l, it's not oversized for my aspirations. My hp predictions are relatively mild, only about 5hp max gain(on a 97 7afe). I have an automatic also, so i don't expect to see anything drastic. A 5800rpm redline isn't very inspiring on a 4 cylinder these days. Kwanza used a good choice of words, this is more of a Test bed than an actual performance mod. My cousin in Canada is building a 3sge in an 89 camry, and if this works good enough for me, i'll try to build him a set. I also chose Yamaha as opposed to Suzuki or Honda in hopes that some sensors might be shared or have a same fitting, but i still have to cross reference. Kinda doubtful, but i may be suprised. As for tuning, I'll be using a wideband to tune each cylinder. My goal is to buy a spare 7afe exhaust mani, and tap each runner for an o2 sensor. I'll just use one WB sensor and plug the other three runners while testing whichever cylinder. Since the Yamaha ITB's have various spots for tuning the amount of air entering from each TB(and it's mechanical), it'll take some time but it should be worth it. Remember, with ITBs we're able to tune each cylinder independently, so while the ecu gives a general direction to the injectors to fire at like 80%, the amount of air entering each cylinder can be tweaked regardless. I'll be using the stock maf(seems like a waste of time then, right?), but this is just a test. I'll also be using the stock injectors, just have them flow tested and maybe blueprinted. The reason i'm choosing this path of tuning is because i recently acquired a brand new wideband controller. It's the Pivot Multiple Data Logger. Very "jdm" and Very discontinued. Ebay is the greatest, i got it for about $200 with WB o2 included. Anyways, the datalogger is able to display AF ratio, Injector pulse width, and some other Airflow related readings. Also has a tach... something my car doesn't have : ) I can understand the skepticism some of you guys might have, a few bad experiences regarding other members might put you in that state of mind. But I'm glad to hear some of you guys support me. Thanks. |
Dec 19, 2005 - 11:02 PM | Forum: Engine/Transmission/Maintenance · Post Preview: #369153 · Replies: 16 · Views: 3,235 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
Yeah, i wasn't sure when i was typing it, but according to google and dictionary.com it's correct. Anyways, i heard some stuff about another guy that tried to do this here, but i haven't looked through the archives about it yet. I'll look it up when i have some free time. |
Dec 19, 2005 - 10:54 PM | Forum: Engine/Transmission/Maintenance · Post Preview: #369151 · Replies: 16 · Views: 3,235 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
This thread will be an ongoing How-to article on installing Individual Throttlebodies from a 2004 Yamaha R6 onto a 7afe(ae102). The first few installments will be purely mechanical, and will assess designing a bracket, figuring out how modify the fuel system on the engine, and fabbing up a plenum and with spots for most sensors(haven't decided on the EGR system yet). Towards spring, I will be installing the entire setup and fine tuning it. This really is a grassroots mod, and i don't believe it should cost much more than $200 if you know where to look for parts and how to do basic welding. I bought my ITB's off ebay for $20, so the stuff is out there. Any comments or suggestions can be posted at anytime, however please make sure they are relevant to this thread. Thanks and enjoy. *pics will be up soon of the ITBs |
Dec 19, 2005 - 10:40 PM | Forum: General Discussion · Post Preview: #369147 · Replies: 6 · Views: 1,941 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
yeah, i'm not that guy. But i would like to read his thread, just to see if there's any relevant info on it... well... unless you guys advise against it. If a mod has strong sentiments about it, then i'm a bit hesitant. I used to be *the* mod over at MitsubishiForums.com My name was SpyderGS. But lost my spyder and gained 2 corollas (one was free!). Anyways, i suppose it would be best to post this stuff in the Engine section. I guess i'll start a new thread there and update it every time i progress. |
Dec 18, 2005 - 11:25 PM | Forum: General Discussion · Post Preview: #368771 · Replies: 6 · Views: 1,941 |
Enthusiast Joined Dec 18, '05 Currently Offline ![]() |
Hey everybody, i'm new to this forum but am glad to be here. I have an ae102 that i'm now starting to modify, it's an auto though, but i still like it. Anyway, i decided to join up here since you're all quite technically inclined and know what you're talking about. Anyways, I'll be throwing on some ITB's from a Yamaha R6 on the 7afe these next few months. I know that it seems weird but my goal isn't a high revving 7a, but a nice torqy engine with response. The tb's are 38mm(small, i know) but long stacks and a large plenum should increase intake velocity quite a bit. Plus ITB's just sound great too. I'll be putting up pics of everything i do, so anyone who wants to replicate this is might find it easier. Also, since i am in college, this is a true grassroots project. Which means it's cheap, and unfortunatly slow... progress-wise. I believe i read that some other members have done this mod here, but i can't remember off the top of my head. Any input or comments are welcome. |
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