130 midbox straight pipe?

[koltonstanley]

hello,
does anyone know if someone sells a midbox replacement for a 130 hcpu?

i see everyone sells a straight pipe or mid box replacement pipe for a 90 or a 110 but i cant find one for a 130.

is it the same as the 110?

thanks

[rick130]

Which engine?

Not sure about later engines, but the large centre muffler on a 300Tdi is a straight through, perforated tube.

[schuy1]

Just go to a muffler shop! they will replace the muffler with a straight pipe for a damn sight less than the overpriced flubbery aftermarket pipes! And as Rick said the 300's is straight through! The only reason I removed mine was it got damaged offroad.
Cheers Scott

[Don 130]

Which engine?

Not sure about later engines, but the large centre muffler on a 300Tdi is a straight through, perforated tube.

So, does that mean there's no great advantage to removing the centre muffler from the 300TDI 130 in pursuit of extra performance?
I know one thing, I don't want extra noise.:D
Don.

[spudboy]

I got my local muffler shop to make up a straight through centre section for my 130. Took them about an hour and they charged me less than $100 from memory (3 or 4 years ago).

[koltonstanley]

It's a 2.4 puma... 2010.

Sounds like I should just hit up a local shop.... Just yank the middle box and add a straight pipe in the middle.....

Still don't know why they don't make anything for the 130 hcpu!

Everything is for a 90 or 110....

[rick130]

So, does that mean there's no great advantage to removing the centre muffler from the 300TDI 130 in pursuit of extra performance?
I know one thing, I don't want extra noise.:D
Don.

None whatsoever in my not so humble opinion!

People will tell you that the turbo will spool faster, I call placebo!

Want faster spooling, lower EGTs and a wider rev range from your engine?

Go to a 2.75" or 3" system, and even then, the improvement isn't huge.

[dromader driver]

$110 approx. a couple of years ago including the hotdog. Makes a difference

[mox]

The centre muffler is basically straight through but in its standard form has a small restriction at each end. The 60 mm OD pipe is 57 mm inside but is squashed down to 53mm ID and pushed into each end of the 57 mm ID muffler and welded. I have got as far as cutting this bit of maybe 40 mm long tapered pipe out and rewelding the rear of mine so there is no restriction and turbulence from it but have yet got to get around to doing the front. A bit more fiddling around as before final welding would have to be held in correct position and tacked.


The rear pipe from the centre muffler to the rear small round muffler is 56mmOD and 53mm ID. This straight through muffler is also 54 mm ID. I think pipe was also squashed a bit, creating another turbulence inducing restriction. However, after bending the pipe backing into something with my Defender, I cut the rear muffler off and put a slightly larger pipe straight back and added a hole in the chassis outrigger to accommodate this. Dispensed with the 51mm/2 inch ID sort of S shaped standard last piece of exhaust system. Seems to make little or no difference to noise levels whether there is a rear muffler or not.


As previously mentioned, I hope soon to get around to redoing the joint between the centre muffler and pipe to the front of it. The ID of the restriction is about the same as that of the rear pipe but it probably interrupts largely laminar gas flow and the extractor effect. Most likely there is a small improvement in gas flow from replacing the muffler with a straight pipe, as many seem to claim there is. However, the same gain should be achieved by removing these restrictions from the muffler ends, without significant increase in noise. Probably this noise contributes the perception of better power and performance though!