Hi
I have a Nurspec R exhaust which includes the back box and center section. It is 3" all the way through except where it joins to the original downpipe where it narrows to 2.5"

When I get round to changing the downpipe I'm thinking that the best set up would be a 3" to 3" with a custom made 3" end put on the blitz centre so its 3" all the way through from the turbo back.

It would be a lot easier & cheaper to just get a 3" to 2.5" downpipe & leave the 2.5" narrowing.

I'd like to know if:

The 3" to 2.5" narrowing is advantagous in any way? ie backpressure? To my layman thinking its just an obstruction to flow.

Or if 3" all the way through is the best set up and offer the best gains

Any info much appericated

 

I have a Blitz Nur Spec onto a H+S Downpipe, (3in to 2.5) and as soon as i can get over to H+S to get them to adapt my downpipe and blitz to 3" i am on my way!!

Rob

 

Rob any idea how much that will set you back?

Cheers

 

IIRC, £35 to change my Downpipe to 3" all the way and the same for the Blitz, so £70... however i am having some other work done to the system to straighten it out a bit.

Rob

 

Rob, once you have done all these mods any plans on how you will pass the MOT as none of the orginal pipes will fit unless you change the whole lot.

 

I probably have a 3" centre section (with cat) in my garage somewhere

Rob

 

Rob which model have got & what centre pip have you got or know of that will pass the MOT

 

It is a custom centre pipe with cat
93WRX

 

bpm is one of the best on the market, one for sale here:

http://www.scoobynet.co.uk/bbs/threa...hreadID=188729

 

I have a scoobysport downpipe with my nur spec r system
sounds the biz

 

If you fancy swapping your Blitz for my HKS Hiper, drop me a mail.

 

Mega, what cond is your Hyper in??

Rob

 

Ive gone for a 3inch straight through downpipe to match my HKS Hiper.

It is currently going through a modification by H&S as recommended by many power scoob owners. It is the splitter at the end of the openeck. That way, you get the full flow from the 3 inch & have the back pressure from the splitter

Hope this helps.

Bob

 

Ive got scoobysport to and its to loud!

 

5 Type R & Money: Is the d/p 3" to 2.5" or 3" to 3"?

Rob: where did you get ur custom center made & what did it cost you?

Bob: I've been told on 22b.com that the less the backpressure the better, can you direct me to any posts on this board that say otherwise, plz?

Cheers

Jazz

 

Can't remember exactly but I think it is a 3"

 

YHM Rob ref my Hiper