ITB's on 16v

[ae8286]

hello i have accuired itb's of a 20v ST and apart from the electronic aspect can anyone rccomend a adaptor. My main concern is a feed for the brakebooster pipe and the vacuum source. does anyone have an idea?

[Ivan141]

Technotoytuning sell a manifold adapter, the vacuum issue is usually solved by running tubes from every runner into a single vacuum buffer (reservoir), and run the brake booster and map sensor from that. Check Ian's s2000 hachi project thread for the vacuum reservoir thingy and setup.

[Roku_trueno]

Brake booster...If you want to keep it, do it the way Ivan mentioned, but in your position I wouldn't use it...Think about it, if you ever drive a car without brake booster (servo), you will see that you will have much better feeling.

[jondee86]

Suggest you look at using a separate tapping (or tappings) for the
brake booster. Otherwise you will be sending the ECU a "false" reading
each time you use the brakes. Probably not a biggie unless you are
using the "heel and toe" driving technique

Deleting the brake booster will most likely mean re-engineering the
braking system. Disc brakes are not self-energising, so if you just
delete the booster without changing anything else, the pedal effort will
be high !!!

Try driving with the vacuum hose disconnected if you want to get an
idea of how high... but allow extra braking distance !!!!

Cheers... jondee86

[PetzK]

jondee86 Wrote:Suggest you look at using a separate tapping (or tappings) for the
brake booster. Otherwise you will be sending the ECU a "false" reading
each time you use the brakes. Probably not a biggie unless you are
using the "heel and toe" driving technique

I don´t really think this would be an issue, as you brake booster stores a certain amount of vacuum during driving, plus you have a one way valve in your vacuum hose. and, the booster is not using a lot of air, thus not really affecting your vacuum readings...