GTR Forum banner

1 - 6 of 6 Posts

·
Registered
Joined
·
426 Posts
Discussion Starter · #1 ·
Since fitting the R33 GTR engine into my R32, my air/fuel ratio meter has not worked properly and the car is definitely running rich.
I used the turbo's and elbows off the R33 so they had the larger O2 sensors (18mm thread, 22mm spanner size)
Having called several of the 'top tuners' who were no help at all (to be fair I don't spend money with them so I can't blame them!), I have done some in-depth research....

The R32 GTR was fitted with Titania sensors which always have one red wire and work on a resistance value.
The R33 GTR was fitted with Ziconium sensors - these are more popular and have 2 white wires and one Black, and these work on a voltage rather than a resistance I am led to believe.

The R33 ones ARE NOT compatible with the R32 engine management.

Obviously, the sensors from the R32 will not fit R33 elbows as they are much smaller 12mm thread, 17mm spanner size.

However, there is a solution. You can buy Titania 3 wire sensors with the larger 18mm thread.
I used a company called www.lambdasensor.com who were extremely helpful. I got 2 new sensors correct fit for my car for £150 all in.

Obviously if you have aftermarket ecu's you may have other ways to get round this. Cheers. Kev
 

·
Skyline Section Manager
Joined
·
11,878 Posts
Good tip, well done.

I simply used R32 elbows.
 

·
Registered
Joined
·
426 Posts
Discussion Starter · #3 ·
So would I

Yes I would have done if I had realised, but sorted now so I'm happy :)
 

·
Registered
Joined
·
296 Posts
This is very helpful information, since I have an R32 ECU that I want to try out in my R33 (the R32 can be remapped by a local specialist). However, I have held off doing anything with it until I knew for sure if there was an issue or not, since there is not much info on the subject.

So, basically your solution was to simply install the Titania sensors, and you did not have to rewire any of the connections? Are the R32 O2S plugs a 3-wire (i.e. heated style)?

Thanks.
 

·
Registered
Joined
·
426 Posts
Discussion Starter · #5 ·
Wiring

Yes the R32 O2's are 3 wire, but they are not heated, the Titania sensors work differently.
The sensors I have purchased have 3 wires and the correct colours - Red, Black & White but do not come with the connectors, you do have to splice them.
In your case, the first thing I would do is get the guy that can map the ecu to find out if you can switch from one sensor type to the other within the ecu, as i know some aftermarket ecu's can actually turn off the O2 input.
Other than that, you will need the Titania sensors, check the size on your R33, it will probably be 22mm spanner size and 18mm thread. In that case, you will need the same sensors I have purchased.
Hope this helps
Kev
 
1 - 6 of 6 Posts
Top