Are ITB's consistent with catalyst

[Iciclehead]

Hi guys, I am just lining up to pick up a set of Eisenmann heat exchangers for my 3.4 project engine.

The engine will be a new build, new case, Mahle 98mm's P/C's, DC35 cam, and PMO ITB's. It will have a full engine management system that I have not yet decided on (Motec, the new Megasquirt or similar) with CoP's, twin plugged of course.

I am planning on getting the Eisenmann's that are cut back to allow a pair of catalytic converters should I decide to go that route.

Question is, can you make catalysts work with ITB's or is the control too poor at idle and similar to make it work and keep the mixture stable enough to actually clean up the exhaust somewhat.

I am not looking to make a low emissions vehicle, but since the car may well end up in a controlled jurisdiction in Europe, it would be useful to at least be able to pass emission tests for the year of the chassis - 1989.

Any thoughts or knowledge would be great!

Dennis

[Speedy Squirrel]

Absolutely they can work, but you need to choose components and pick the control system appropriately.

In any case, a sequential injection system is the best from a performance and emissions standpoint.

Wide range O2 sensor located in each bank, before the catalyst.

Injectors that are intended for a two valve engine (30 degree or less spray angle).

If the controls can do oxygen perturbation (kicks), that is a plus.

[safe]

Originally Posted by Iciclehead

I am not looking to make a low emissions vehicle, but since the car may well end up in a controlled jurisdiction in Europe, it would be useful to at least be able to pass emission tests for the year of the chassis - 1989.

Any thoughts or knowledge would be great!

Dennis

Check carefully what the intended country has for regulations, if its in the EU, not in EU, was it a part of EU in 1989.
It might not be legal to change the intake from stock.

[Iciclehead]

Originally Posted by safe

Check carefully what the intended country has for regulations, if its in the EU, not in EU, was it a part of EU in 1989.
It might not be legal to change the intake from stock.

Good advice and part of the research plan...country is the Netherlands, I am a citizen, so far it looks OK, but the laws are changing.....

Thanks!

Dennis

[Iciclehead]

Originally Posted by Speedy Squirrel

Absolutely they can work, but you need to choose components and pick the control system appropriately.

In any case, a sequential injection system is the best from a performance and emissions standpoint.

Wide range O2 sensor located in each bank, before the catalyst.

Injectors that are intended for a two valve engine (30 degree or less spray angle).

If the controls can do oxygen perturbation (kicks), that is a plus.

Thanks for the feedback and you gave me more stuff to research. I new about the wide range 02 sensor, the other stuff is new to me so research is in my future!

Dennis