yes I said turbo itb's would this be possible I was thinking about this all last night if you made a custom plenum around your velocity stacks could this work.

let me know what you guys think.

would there be any benifits to this?




Modified by DC-2R at 8:47 AM 2/1/2004

 

enjoy tuning that

 

All good ideas start out as bad ideas with people saying stuff like "wtf, that will never work!"

Let me be the first to say: wtf, that will never work!

 

For the average person driving on the street I don't think it would be worth it.
maybe for high hp drag cars, they could benefit from the direct flow into each cylinder???

 

Yea, you can make ~700whp street car with a Victor X manifold (or even any other decent FI manifold), so why change that... Don't know if it would benefit you in any way or not... We're working on a twin TB manifold for Brian's car but that's just to screw around with... Who knows if there will be any gain... Just my $0.02


Modified by Kataku2K3 at 12:52 AM 2/1/2004

 

I think the nissan pulsar GTiR had these as a stock configuration. Bolted onto the B16 of the nissan world the sr20dett.
-PHiZ

 

This is correct. There are also Turbocharged 5 vlavle 4AGs with the ITB setups as well.

 

thanks for your guys input this idea is kinda out there and no where near realistic unless I was like puff daddy or something.

 

there are lots of nissans with ITBs. Ironically enough they also have maf sensors that don't read wot at 40% throttle like our MAPs do.

 

Yeah Nissan made the Pulsar GTI-R SR20DET and it had ITB's with a T28 strapped onto it stock.

 

the rb26 had itbs

 

I don't think it would be too difficult even with tuning. Once you close the ITBs then you've pretty much created an Intake Manifold.

It would be something worth doing if you already had a set of ITBs and no one would buy them. (They're pretty expensive, trust me I know.) I say go for it.

 

i was thinkin bout copyin the 4g64 intake header design and bringing that into 2 throttle bodies that are billet replacements for chevy tpi 350's, then i woke up and relized it would take forever to fabricate. i am using an 80mm custom tb on my new build....90 degree elbow off my itr manifold. should look real nice and give some extra hp.

 

ITB for is for all motor, not turbo, not even worth it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Quad-Damge &raquo;</TD></TR><TR><TD CLASS="quote">ITB for is for all motor, not turbo, not even worth it.</TD></TR></TABLE>

who makes these imaginary rules that its for all motor only? i guess nissan is stupid since they have ITB's on the skyline and the sr20 GTi-R motor. worth it? probably not. for all motor only? thats what ignorant people say

 

IMO, there's a difference between being innovative and being cost conscious. If there's significant gains acheived through itb's then go for it. Frankly, on a boosted motor, the significance of itb's are small and not cost effective unless you're trying to extract as much horsepower as humanly possible. There's so many more ways to increase output such as toying with compressor size that'll be more cost effective. Unless you've maxed out all your other components, I'll stick with something more conventional.

Sam

 

Since its been awhile since this has been brought up again in FI im bringing this post back from the dead.

A lot of good info here.

From doing my own research and reading i dont really think the gains, if any, are worth the fabrication on a honda motor.

 

The Nissan world has been doing this for a while.

 

some one already said it but once you put the plenum on it would be like you have a normal intake manifold with short runners depending on how long you made the runners off the plenum ( i would think no proof..)

 

i agree,

even though it would be benificial no matter what...cause if you have each cylinder getting as much air as it needs, because they are all different....but in a turbo charged vehicle your forcing the air....N/A the motor has to ingest it...thats why the imaginary rule of ITB's are for all motor comes from...its more benificial to these motors....on turbo cars im not sure if the benefits are high enough to justify the time involved...

and the other thing is it has to have some sort of manifold before them...like the picture above.....which in turn basically makes it like a regular manifold setup....cause its a mass of air the engine is ingesting from...instead of 4 individual inlets that it gets what it needs..

but hey im always into new things...it could be more beneficial than we all think....we just need proof..

if you have the time, the energy, patience....i would say do it...thats the only way to tell

 

those are some sick *** welds.

 

I'll say, get a nice short runnered sheet metal manifold and forgo the itb's.

Sam

 

I think the idea behind ITBs is response, not power. When you hit the gas, the air goes right into the cylinders, and doesn't have to go 8-20 inches, or whatever the distance is, with a single TB set-up. I don't think tuning would be that bad, but I'm not sure it's worth it as a $/hp/response ratio for most people. However, I was at the junkyard and say some incredibly tiny TBs that I could almost reach my thumb and index-finger around, so those would make an economical solution

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC-2R &raquo;</TD></TR><TR><TD CLASS="quote">those are some sick *** welds.</TD></TR></TABLE>
TIG

 

we have done it on alfas for years