advice on replacement back box

alexb · January 01, 2004, 03:34:12 AM

BTW, Happy New Year to all you rotary peeps!!

20B_boy · January 01, 2004, 11:22:21 AM

QuoteOriginally posted by alexb
Max, cheers for the FEED lead I\'ll give ReWorx a call!

Geff may have a Sonic in stock. I\'m sure he has an Apexi GT-spec.

Neither are cheap though, Â£500-600 at a guess??

alexb · January 01, 2004, 12:51:12 PM

ouch:(
well, a NUR Spec R will be around the 400 mark, so the real question is whether it\'d be worth spending the extra for the Feed...

scooby_si · January 01, 2004, 01:48:44 PM

although dont forget the new ECU if yer decatting

Si

alexb · January 01, 2004, 04:31:03 PM

Si,

I take it then that the systems like the NUR Spec R replace the second cat in the centre section? I\'m basing this assumption on what\'s under a scoob though, FDs could be different... I could go outside and look but it\'s dark and raining

I was hoping to avoid fitting a PFC just yet! Presumably if I just replace the back box the ECU can cope with that?

scooby_si · January 01, 2004, 06:13:52 PM

yeah i was too but i believe the RX7 cat is just in the centre section & so replacing that wood need uprated ECU the general consensus seems to be yer OK with induction & backbox on standard ECU but any more & it should really be next on the list!

Si

Adam · January 01, 2004, 07:15:42 PM

The Blitz Nur spec is a cat back system. It does not replace the main Cat. You are right in thinking though that if the cat is replaced with a straight through pipe you will need a ECU upgrade.

Adam

scooby_si · January 01, 2004, 07:30:37 PM

not to be confused with the nurspec "R" thou

Si

Adam · January 01, 2004, 07:45:56 PM

Doh! :confused: missed the \'R\' lol this does replace the cat, not sure if it\'s a straight through though, would like to find that out.

Adam

alexb · January 02, 2004, 12:48:57 AM

Hmm, interesting about the position of the cat... I suppose the high exhaust temps in an FD mean it\'ll work that far down the exhaust.

From seeing pics it does look like the spec R is straight thru - but one thing that I\'d like confirmed is the material the piping is made from. I know the can is stainless, but I\'ve got a feeling the pipe is aluminised steel - seems a bit of a cop-out by jap manufacturers not to use stainless exclusively, expecially considering the cost!

scooby_si · January 02, 2004, 11:26:30 AM

hmm i maybe wrong it occasionally happens but me spec R on scoob was all stainless that\'s why i liked it so as it was all quality

Si

Adam · January 02, 2004, 01:24:48 PM

The Nur spec is stainless from the cat back on the rx7.....well it was on mine when i fitted it

alexb · January 02, 2004, 04:00:57 PM

Excellent, cheers for the confirmation guys!

alexb · January 03, 2004, 04:51:10 PM

Well, it looks like I\'ve made my decision!

I\'ve been offered a good price for a Mazdaspeed back box (don\'t know the model) from a crash-damaged car, so especially considering the after christmas cash shortage that looks to be the way to go!

20B_boy · January 03, 2004, 04:57:38 PM

The ones I\'ve seen are well made. Generally not that loud either. My car had the full MS split system on it (DP-MP-CB) when it arrived from Japan originally.

I\'m not sure all their cans flow as much as some other systems but they cant be that bad, dont think any of the MS stuff is rubbish so you probably got yerself a deal...

Nice one.