Quamen

iTrader: (14)

Kinda of an ackward question but here it is:

Does it matter which way the throttle body plate opens up?

Here is what I mean. Imagine looking at your throttle body opening. Lets say that the top of the plate rotates forward. Now if you flip the throttle body upside down (180 degrees rotation) and look at the throttle body open the bottom part will rotate forward as it was orginally the top prior.

I could see this making a slight difference if the TB was right before a bend that that had the same pivot axis as the TB.

But in the case of ITB's for let's say a Honda S2000 where the ITB's are generally straight shots into the heads, would it matter if the top part rotated forward instead of the bottom or vice versa?

Thanks in advance. Just a little weird question that has been perplexing me. Lol!

Quamen

iTrader: (14)

Anyone have an answer?

MI 35th

iTrader: (16)

the engine does not care which way the plate pivots it is just allowing the air in, however som TPS sensors must be facing the right way to work properly! But we put ITBs on with the plates pivoting the opposite way as stock and it performed just fine!

Hope that helps!

Quamen

iTrader: (14)

Thank you so much for the help!

What car did you put the ITB's on just out of curiosty?

MI 35th

iTrader: (16)

EP3 2004 Civic Si

We used CBR 600 and made a manifold out of those!

Quamen

iTrader: (14)

If anyone has some really good articles or links to ITB design and configiration it would be much appreciated!

nicholasm617

iTrader: (3)

throttle bodies are designed to perform for driveability and performance how they are. why not just get one bored out instead of trying to mess with it like that?

Quamen

iTrader: (14)

Because ITB's have better throttle response than a normal throttle body and obviously will adding some power.

Plus, what is the fun in going to same route as everyone else.

It is just a fun little project that I am going to work on this winter when I can't drive the Z.

Zexy

iTrader: (55)

That would be great. The real challenge will be the DBW. Eliminating it and replacing it with cable throttle or using the DBW somehow. Unfortunately i had this idea before but i don't have the knowledge to pull something like this off

The fellow from LHP can help you alot. I've talked to him before .

MI 35th

iTrader: (16)

Top Secret got rid of the DBW and used a Custom ECU and throttle cable. That would be the easiest and most cost effective way to have ITBs on the Z not to mention I dont think the DBW could react fast enough to the throttle responce of the ITBs in the first place!!! Not Sure though...

nicholasm617

iTrader: (3)

im confused, your topic says itb, so most tuners think "individual throttle bodies" being a mechanic i see "intake throttle body" before i think of individual bodies. then in your first post you speak in reference to a single throttle bodie leading me to believe i read it correctly the first time, thats what i was commenting on, if your doing a individual set-up then go for it, great gains can be made.

Zexy

iTrader: (55)

Exactly. A full standalone will have to be used on these cars.

MI 35th

iTrader: (16)

If this was a cheaper and more traveled routei would definately stay NA, and have a set of ITBs! A v6 sounds so amazing with ITBs!

MI 35th

iTrader: (16)

http://www.gaijininc.com/partdata.php?id=198

$6,100 US to have a setup for the Z from Top Secret and that doesnt include tuning!

Zexy

iTrader: (55)

Well we all know Top Secret is an outlier in terms of pricing of certain automotive parts. Their price range is nowhere close anything else in the market if it's available. Custom ITB setups could be less expensive than TS ones for sure!

MI 35th

iTrader: (16)

true, but I was reading a little more into it, TS comes with a throttle line kit, fuel rails, vacum manifold, and everything seem in the pic!

MI 35th

iTrader: (16)

If I were doin my own ITB Kit ID start with 2x TWM 3003 series units! Adapt them for the Z, Take a Q45 TB linkage like they did with the Z32
I would probably try to tune with UTEC do price wise and have to get a Golden Eagle Vacum Manifold But I think It would loose cruise control which I couldnt have! Throttle Bodies
3003 Series, for Porsche


TWM 3003 Series units are a direct replacement for downdraft IDA 3C carburetors as fitted to early Porsche 911, Ferrari 512 and Lamborghini models. The barrel centers are at 94 mm and the overall height is 123.5 mm. The manifold mounting flange is identical to the flange on the Weber IDA 3C. The air filter flange differs from the carburetor in that it uses 6 mm studs which are 1 mm further apart than the carburetor. Each barrel has an air by-pass screw.

MAP sensor ports are provided on both units. There are integral mounts for the fuel rail which is supplied with the unit. AN-6 threads are in each end of the rail for which a specific fitting, part number 2900-9206, is available. The right hand unit incorporates a shaft with a single 5/16 " D-drive and mounting pad for TWM and other throttle position sensors.

Air horns are not supplied with the throttle bodies. Horns 50 mm long are available for all bore sizes. In addition, horns 35, 75, 90, 100 and 115 mm are available for the 48 mm bore size.

Ordering Guide

Order by Series number, bore size and whether left or right example: 3003-4403/L where 3003 is the Series, 44 is the bore size in mm, 3 is the number of injectors, left indicates shaft without TPS drive.

Throttle sizes available 40, 44, 46 48 mm

Please note the 3003 Series is the only TWM throttle body where 'left' does not indicate the switch drive unit.

MI 35th

iTrader: (16)

either that of the fact that TWM for 4500 will build a one-off single set of ITBs and the more set that are ordered the cheaper the prices become!

Zexy

iTrader: (55)

Will that include DBW signal to use in conj with stock ECU w/ pigyback?

MI 35th

iTrader: (16)

I dont think so! You would have have something fabbed up using a stock TB which would be the tricky pain in the *** part, when it comes to wires I am about useless!