Hi all, currently have a TT Manual with BoVs, HKS single exit back box, and a cone filter. Just wondering what would be the next logical step performance wise?

 

Thanks,

Stefan

Getting it mapped.

 

Speak to Turbonoz / noz / noel

Will do, thanks!

That was easy haha thread closed :lol:

For performance, get rid of the Bov's :tt2:

For performance, get rid of the Bov's :tt2:

 

For EVERYTHING, get rid of the BOVs!!!!!! :lol:

Decats would be a worthwhile choice.

Decats would be a worthwhile choice.

 

 

 

How do you get around MOTs? Or is it just a case of swapping pipes once a year?

The zed is not on the MOT database for emissions and therefore is tested as a pre cat :thumbup:

Oh really? I asked my local MOT center and was told it would pass the emissions test without a cat but would fail because of a new cat-presents check. Something about if the car came from factory with a cat it needed one for the MOT regardless of emissions.

He is talking *****x :thumbup1: all zeds had cats from the factory and regardless of that fact, because its not on the database a pre 95 is and has to be done as a pre cat test.

 

There have been numerous threads on this topic, also we have a few members who are MOT testers

Pre-92 Graham.

My bad lol as mine was on a K plate 93, it is infact a 1990 car according to the vin plate, i know i initially had similar issues with the MOT station about the emissions.

Oh and also, what is the best way to reduce turbo lag?

Pre-92 Graham.

 

Correct as usual. database details are irrelevant, date of first use is the governing factor here

I correct myself here, pre August 1995 is non cat test figures. Just not my zed sadly:thumbdown:

Cat eligibility varies between JDM and UK cars as well. Mines an 89 so no probs what so ever.

Oh and also, what is the best way to reduce turbo lag?

 

Do a boost leak test, a properly sealed system will help lots with reducing lag as well as being important anyway. If it feels overly laggy I bet it's leaking. Beyond maintaince, breather mods work well reduce lag and increase effecientcy, the ultimate is to have twin in takes upgraded intake and intercooler piping, 2.5" outlet intercoolers obviously larger cores too, divorced 3" expansion downpipes and test pipes with 3" cat back. You will of spent a few quid by then though. A set of 2.5" divorced downpipes and test pipes with the catback made a big difference in response.

Cat eligibility varies between JDM and UK cars as well. Mines an 89 so no probs what so ever.

 

No variation here mate, pre august 1995 is non cat test on a zed.

http://www.300zx.co.uk/forums/showthread.php?161100-New-MOT-reg-for-checking-presence-of-catalytic-converter&highlight=cat

What's the relevance here mate?

To clarify that JDM cars that are pre 95 are fine to decat legally. I posted that before you asked about uk cars. Afaik uk cars are on the database so therefore it's only upto 93 you get away with it, grey imports arnt on the database so are tested as precat. No tester has ever even mentioned it with mine.

To clarify that JDM cars that are pre 95 are fine to decat legally. I posted that before you asked about uk cars. Afaik uk cars are on the database so therefore it's only upto 93 you get away with it, grey imports arnt on the database so are tested as precat. No tester has ever even mentioned it with mine.

 

The z32 isn't on database regardless of uk or import. As long as the vts gives us a date of first use which it does 99% of the time we can easily identify its emission limits.

It should pass the emission limits regardless should it not? And that doesn't appear to take into account the presence of the cat? As lack of presence can be a fail in certain scenarios. I was always told for uk cars pre 93 and JDM 95 we were fine. Is this incorrect?

The z32 isn't on database regardless of uk or import. As long as the vts gives us a date of first use which it does 99% of the time we can easily identify its emission limits.

 

Exactly!

 

It applies to all pre 1/8/95 registered Z32s irrespective of whether UK or import, since the 300zx, by any name, is not in the database!

It should pass the emission limits regardless should it not? And that doesn't appear to take into account the presence of the cat? As lack of presence can be a fail in certain scenarios. I was always told for uk cars pre 93 and JDM 95 we were fine. Is this incorrect?

 

Pre 92 vehicles are non cat test, from 92 to August 95 a cat test DOESNT apply as z32 is not on database, 95 onwards cat test will apply

So removing a cat on a zed upto 1st August 1995 is not a failure as only vehicles requiring a full cat test (not z32) are required to have one fitted.