I'm thinking of adapting some 4ag independent throttle bodies to fit my b16. It wouldn't be too difficult and they can be had for around $250. I would need to make a custom manifold but I think I could do the whole set up for under $500. I'm just wondering if it's worth it? I can't find anyone who has put itb's on anything other than a full race motor. I'm curious to know how a mostly stock b16/b18c would perform with this mod.

 

i've been doing a little research on itb's for a little while. well the home made ones.. from what i heard you can do it but your power brakes run off of the vacuum you get from your stock intake pleneum and when you go with itb's you don't have a pleneum unless you run tubes to one somwhere then run the vacuum from that to the brake booster....

 

Yea you need to make some sort of vacuom source.I guess you tap all the runners and make a vac box for it and connect all your sensors to that box.Just stuff i read and im not 100% though.

 

-toyota 4ag (aka AE101) ITB's are the same units that TODA uses so you can order a TODA intake manifold for itbs on a b16 head and you will need to buy or fabricate other parts as well.... fuel rail, vacuum lines and canister, etc.
-toyota 4ag itb's are the best bet.
-there are so many threads on this, its ridiculous... here is info from another thread-

The TODA ITB's are partially made from AE101 Parts
The TODA aftermarket for Honda and Mazda is the same 3-piece setup.
TODA made the manifold setup for the b18c5 flange and has an intermediate piece then the ITB's.
A gasket that does NOT transfer heat from the manifold separates the intermediate piece.
I can actually touch the ITB's after a dyno run, wish I could find out what TODA makes this gasket out of (it looks and feels like metal also that's the mind boggling part), unlike the Hondata piece.

Chop any intake manifold for the head you plan on using.

Here is where you have to improvise:
- Coolant from the head (tee off into your car heater hose (get the T from the red help section of any autoparts store).
- Cut off the flange on the stock intake manifold and block off the head port where coolant flows.
- Home Depot has the aluminum flatstock, use that to drill and concoct a throttle body cable shaft.
- Make a vacuum canister with the stock IAB black box off a 94+ GSR or a Supra t/t canister (take out the internal check valve).
- Mount your IACV into a plate to block off and pass coolant thru it but not connected to anything except stock engine harness (pass coolant thru it or the car will keep revving up and down from 1K to 4k then back to 1K etc.).
- If you use the CBR ITB's then the stock Honda TPS plug will plug in. If using other ITB's then get pins for a FORD at the local pepboys and connect to the TPS that comes with the ITB's you have. If its Toyota then a supra t/t one or other corolla will also work, ignore the forth wire (its not needed for Honda).
- Mount your stock air temp sensor onto your firewall right in front of ITB's.
- Block off your other coolant hoses.
- Block off the PCV outlet on your block (not necessary for the b20b/z and b18b).


I'll keep these details on my website at http://www.gbrtuning.com for future reference.
Greg aka CHEETAH
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Do you know anyone that makes these and sells them as a kit?

 

good idea

keep us updated on how it goes