apart from the likley hood of failing an mot, err bothered, im feeling the need to decat.

 

For obvious reasons i want to get rid of my cats but after speaking to ryan at ztech and reading a thread in the tuning and mods part of the FAQ, i get the impression that they are the main cause of turbo failure, and the changing of PCV valves/ seals, cant remeber which is correct, can help prevent this happening

 

WTF is a PCV valve/ seal???? :confused:

Are they expensive to change/ check??? :confused:

 

If, and thats a BIG IF, who sells them and how much.

Ive had a quote of SUMO power and they want £284 +vat+p&p. which works out at £350 i think... is this a good quote??

 

alot of questions i know, but as far as i am concered, as with all cars including the zed, KNOWLEDGE IS POWER!!!

 

Cheers

 

Nick :mac1:

£350 for PCV's :shock: :shock: :shock: :headvswal

Chris, what is a pcv. I have heard of it but cannot remember what it is/does. Cheers. Nick

They around £80 mate lol, i can supply you with the decats and down pipes drop me a line.

 

Decat survey

http://www.300zx.co.uk/forums/showthread.php?t=37089&highlight=decatted

 

;)

Will this solve the problem though? I heard that decatting will lower the back pressure holding the seals on the back of the turbs.....mine have done 120k would changing these valves do the trick if i wanted to decat?

 

Chris how much ur decat, centre & backboxes?

At 120k anything can happen so is hard to say what will happen. I have 1 set of decats and down pipes in, can have them with you on Thursday morning, normally £300 yours for £270 delivered. Would need payment sorted tonight for Thursday delivery though.

Chris i had a look at the down pipe and cat. I want it but i cant buy until the money clears from my loan to fix the zed. I want it though

changed mine yesterday piece a cake just get new pipes aswell old ones were stuck closed with old sticky oil

I've got 2 choices. Downpipe and decat or bov's. Mmm what to do?

FYI:

 

PCV valves: Positive Crankcase Ventilation valves. Rather than vent excess pressure (inside the crankcase) to atmosphere, these pcv valves "recycle" the air.

 

These valves have a limited impact on the turbos and rear seals when decatting. I think we've got a misunderstanding here.

 

The seals Nick is on about are the rear turbo seals located at the exhaust end of the turbo. Over the years these seals deteriorate and the back pressure provided by the catalysts usually keep them in place and prevents oil from seaping through. Leaky turbo seals generally manifest themselves as blue smoke coming from one or both exhausts. Removing the cats will reduce the back pressure which "may" contribute to the seals starting to leak oil. This is generally more likely on high mileage cars or cars which are driven hard frequently. Having said that I know of decatted low mileage cars which smoke and extremely high mileage cars (268,000 kms) which don't so there's no telling what will happen if/when you de-cat.

 

Turbo seals are a PITA to replace as, ideally, you need to get the turbos off the car. And getting to the turbos even when the engine is out of the car is a tough job at best.

 

I hope this clarifies a few things.

 

CheerZ,

 

Dan

I've got 2 choices. Downpipe and decat or bov's. Mmm what to do?

 

 

You'll get a lot more use and "bang for your buck" if you go for downpipes and a decat. IMHO bov's are just for show. (ed - opens a can of worms ... LOL)

 

Dan

danny: as per usual top notch advice, abd after speaking to you i totally agree that down pipes and decat is the way forward. will have to see how the head goes before i jump on the decat ship

 

Chris: im deffinatly interested bud, if i call you when i know the damage to my heads, and if all is well, ill order the downpipe and decat set. ill call you when its closer to the time

 

Ryan@ztech: i know your going to shout at me cause ive ignored what you said about decatting, but hey ho, i want more power dam it. how much extra would it be to fit the decat and down pipe. I would say im being more sensible that usual by checking the condition of the head, i know what im like ,and i would have bought them by now!!! lol