New Toys (ITB's)
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Here are my new toys. they wont be going on until i get a good enginemanagement system tho. I think i am also going to have the plenums redone so they are straight since the ports for the ITB's match the ports on the stock intake mani. Here are the pics.
Oh and they are GSXR Throttle bodies attached to a cut stock IM.
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I did my homework and i also have a Honda-tuning article where they made these exactly how these ones are and all they did was bolt them on and tune it with a VAFC and got a gain of 21.3 WHP. I have been researching these since i saw the article and have many threads saved about them. Its fairly simple besides tuning. I am not installing these until i get an EMS. I am hopefully going to save up for AEM and if not, hondata. I cant just use chrome or uberdata due to lower rpm tuning problems(sub 5500). Here are a few sites:
http://honda-tech.com/zerothread?id=1098708
http://honda-tech.com/zerothread?id=1148512
http://sohchonda.com/v-web/bulletin/bb/viewtopic.php?t=2878
http://www.d-series.org/forums/showthread.php?t=2957 -
its not due to the o2 sensor, its because you have to bypass the map and use a TPS based fuel map. ITB's have a lot less vacuum below 5k than plenum style manifolds have so the map doesnt read sufficeint vacuum compared to what other sensors say and it picks wrong fuel tables. If you just bypass it and use tps based tables, you have really bad gas milage for daily driving.
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[QUOTE=harwood39]its not due to the o2 sensor, its because you have to bypass the map and use a TPS based fuel map. ITB's have a lot less vacuum below 5k than plenum style manifolds have so the map doesnt read sufficeint vacuum compared to what other sensors say and it picks wrong fuel tables. If you just bypass it and use tps based tables, you have really bad gas milage for dailiy driving[/QUOTE=harwood39] last time i checked ITB's aren't made for daily driven use. but if you plan on doing it... swap your ecu's, and run something that works for daily driving. and then buy another ecu with crome or uber data on it.
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good luck ya big pimp you.
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This is prolly a good example why it is easier to go boosted.
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This post is deleted!
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Im doing a lot of airflow testing right now w/ Z6 and Y8 heads an intake manifolds as im working on building sheetmetal intake and doing some head work on them. The stock Y8 intake manifold will flow enough cfm to not start choking down the power until 7500 rpm(based off a 250hp car). Based on those #'s alone there's no way your maxing out airflow of the stock intake running a stock compression/cam SOHC, let alone reving to the stock limiter.
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harwood39 wrote:
so now why does every one think im in over my head? The hardest part will be tuning.This is true....but the hardest part is always tuning....ITB's (I'd imagine, don't know for sure) almost have to be harder to tune than a single TB. Just my thoughts.
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oh, and i forgot to mention that when they were on groshongs hatch they run fine untuned, they just idled choppy but at WOT they were fine.
oh and ITB's are harder to tune due to the fact that they all need to be adjusted individually also just like a carb.
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It's ok, they will be for sale in a week when he wants a new project anyways!
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They're from a Suzuki GSX-R motorcycle. http://www.homemadeturbo.com/tech_projects/itb/
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