Best Exhaust For Xs Either Straight Through Or With Centre Box?

[chris205xs 0]

i was talkin to a friend and as i plan to upgrade the cam he thinks i shudnt opt for a straight through exhaust but a one with a centre box, does it also matter the size of the centre box i.e. larger the better performance smaller the less performance if that makes any sense???

[j_turnell 137 3 Cars]

Straight through afaik means it doesnt have a centre box. On my old XS i used a 205 1.1 centre pipe, which was straight through, was about £25 from local exhaust place and fitted a Pipercross filter, did find the car seemed much more responsive, but prepare for it to be louder as a result.

[macaroni 17 1 Cars]

I have a straight through centre section on my xs and it may be because of the extra noise, but the car does seem to pull harder at the top end than with the centre silencer.

 

People claim that the exhaust needs an expansion box to create negative pressure waves back up the exhaust to create a kind of extractor effect, but I don't feel it at all.

[chris205xs 0]

yeah i would of thought the same as i want it loud, but my friend had a straight through centre section on his 16v 205 rallye and he changed the exhaust wit one with a centre box and it seems to pull a lot better, i jus dont want my xs to be losing power where i can gain. Im getting a custom exhaust just not sure what to go for. anybody done a tried and tested???

[macaroni 17 1 Cars]

If you get a 4 branch manifold, you can stop worrying about what the rest of the exhaust is like and have it straight through. The manifold will provide a much better extractor effect than an expansion box.

[chris205xs 0]

yeah i plan on getting one of those csc jobbies on the next group order so i shud get a straight through system thank you all for your advice.

[stu_woac 1]

my veiw is in another post and its that a straight through centre loses the xs's edge as it doesn't accelarate as quick as with the standard system but get rid off the restrictive front down pipe if on your one

[Guest smokinslim]

My CJ (lower spec 1360cc engine than the xs) had a straight through center pipe when i got the car, but have added a straight through rear box myself since and upgraded the carb to the same as the xs. At idle and low steady revs its pretty quiet, roars when u floor it though and the last xs I came across on my travels couldn't touch me!

[stu_woac 1]

then you woke up LOL

 

no only kidding the reason the xs engine wasnt put in the cj was to keep insurance cheap as the cj is a fair bit lighter than a standard xs

 

but if the xs was being driver hard it would of still stayed and most likey passed you as you havent said you changed the cam over which is different in a xs as well

Edited January 7, 2006 by stu_woac

[Guest smokinslim]

True, but i have a nicely flowed head

[stu_woac 1]

well I'd give you a race but I think thats unfair as mi'd 205 struggle to lose me up to 90mph after tho they start pulling away slowly soon to be rectified tho

[Rippthrough 98]

well I'd give you a race but I think thats unfair as mi'd 205 struggle to lose me up to 90mph after tho they start pulling away slowly soon to be rectified tho

 

 

Off topic, but whs it your Fiat in Retro cars this month?

 

Stu with a 205 on carbs....

[stu_woac 1]

nope I dont own a fiat

 

well I dont think I do LOL

[Rippthrough 98]

nope I dont own a fiat

 

well I dont think I do LOL

 

That's what you know!

[pugrallye 0]

I have a cherry bomb in the centre (came with exhaust) and I actually gained midrange

[Guest rich xs]

Has anyone fitted a Janspeed downpipe-back exhaust system to their XS? Ive seen them for sale for £180 on tinternet and Im veeery tempted esp. since my mid box is on the way out

[Guest smokinslim]

well I'd give you a race but I think thats unfair as mi'd 205 struggle to lose me up to 90mph after tho they start pulling away slowly soon to be rectified tho

 

I've a few small alterations in mind for my engine but once they're sorted i'll take u up on that offer mate

[macaroni 17 1 Cars]

Has anyone fitted a Janspeed downpipe-back exhaust system to their XS? Ive seen them for sale for £180 on tinternet and Im veeery tempted esp. since my mid box is on the way out

 

You just missed one on ebay that didn't go for £75.

 

 

I've a few small alterations in mind for my engine but once they're sorted i'll take u up on that offer mate

 

Come on lads, grow up, it will be my Dad's harder than yours soon.

[Guest smokinslim]

Come on lads, grow up, it will be my Dad's harder than yours soon.

Nah, ma dad's gettin fat n slow in his old age!