22 replies to this topic

[22068]

what diiferences would it make?

[davethemini1293]

you'l have a nice headache

[chappy]

i'll add to your answers as the previous one was very helpful :s


straight through exhaust will give you better gas flow increasing performance slightly, to get a better increase in performance it'd make sense to add a high flow air filter.


hope that helps


Sam


Edit,

and you do have a local club!!!! theres a few!


type in 'northamptonshire MOC' into google, the first one is the northants moc forum! Join up, say hello. If you need a hand with anything, Pm and i'll do my best (also have some contacts for you)

Edited by chappy, 28 October 2009 - 04:24 PM.

[daemonchild]

You'll still need a cat though if this is an injection mini won't you?

[Calman]

As above really. What year is yours because if its and earlier car then you can push the Co2 levels a bit higher i think.

[chappy]

You'll still need a cat though if this is an injection mini won't you?

you will for MOT, can always get a de-cat pipe, bolt it on for the year, the bolt the cat back on at MOT time

[sambarnes]

You'll still need a cat though if this is an injection mini won't you?

you will for MOT, can always get a de-cat pipe, bolt it on for the year, the bolt the cat back on at MOT time

My plan is to get a pipe to replace my cat (you can get them from minisport).

While im on the topic, i was wondering whether or not you can fit an LCB to an MPi/SPi??

sam

[davethemini1293]

i'll add to your answers as the previous one was very helpful :s


straight through exhaust will give you better gas flow increasing performance slightly, to get a better increase in performance it'd make sense to add a high flow air filter.


hope that helps


Sam


Edit,

and you do have a local club!!!! theres a few!


type in 'northamptonshire MOC' into google, the first one is the northants moc forum! Join up, say hello. If you need a hand with anything, Pm and i'll do my best (also have some contacts for you)

did you mean without a silencer?
then yes it will do your head in,
if so this will do you,or your car no favours,
rover didn't spen x amount designing an exhaust for your engine just to put a straight thru pipe on it....

kids.....


if you meant just a de-cat pipe then it will gain a little power,

[bluedragon]

Is this an MPI? If it's a twin point and unmodified otherwise, a straight pipe will add very little other than noise. The engine is constrained for airflow and fuel flow, not exhaust flow. If you've got a big head and cam/rockers, basically pushing it above a true 85 hp (for reference, the vast majority of "90 bhp" kits for MPI's deliver between 75-80 "true" hp in practice) then the exhaust can be constraining.

But it's hard to go over 85 true hp on an MPI due to the fuelling limitations of the ECU, indeed, I would count myself fortunate to be pulling 80 bhp from a modded MPI with stock ECU. (and there is no easy replacement for the stock ECU, but that's another question entirely...)

[chappy]

a straight through exhaust system, is the design.

straight through, means that the silencers have a pipe that literally goes straight through it and lots of holes on the inner pipe which then absorbs the exhaust noise without decreasing gas flow so much as a normal silencer.

rover didn't spen x amount designing an exhaust for your engine just to put a straight thru pipe on it....

Rover didn't put a stage 1 kit on their minis, but people do, and people get a good power increase from it.

Rover didn't manufacture adjustable bottom arms and tie bars as standard, but people put them on.... why? because its a modification to make things better/more reliable


Although i do agree, not putting a silencer on its pretty pointless... (unless your part of force racing )

My plan is to get a pipe to replace my cat (you can get them from minisport).

While im on the topic, i was wondering whether or not you can fit an LCB to an MPi/SPi??

sam

you certainly can, the only difference is the boss for the lamda sensor on the injection LCBs.


hope that helps


Sam

Edited by chappy, 28 October 2009 - 09:35 PM.

[MiniAlex]

a straight through exhaust system, is the design.

straight through, means that the silencers have a pipe that literally goes straight through it and lots of holes on the inner pipe which then absorbs the exhaust noise without decreasing gas flow so much as a normal silencer.

rover didn't spen x amount designing an exhaust for your engine just to put a straight thru pipe on it....

Rover didn't put a stage 1 kit on their minis, but people do, and people get a good power increase from it.

Rover didn't manufacture adjustable bottom arms and tie bars as standard, but people put them on.... why? because its a modification to make things better/more reliable


Although i do agree, not putting a silencer on its pretty pointless... (unless your part of force racing )

My plan is to get a pipe to replace my cat (you can get them from minisport).

While im on the topic, i was wondering whether or not you can fit an LCB to an MPi/SPi??

sam

you certainly can, the only difference is the boss for the lamda sensor on the injection LCBs.


hope that helps


Sam

I really want to get rid of my Cat but someone just told me on a post that I have only just posted! .. that if you get rid of the cat and it was made with one u can get pulled over. The vosa are pulling cars over and doing checks, just talking to my mate and he was pulled by the police for a check (safety) but they an check ur emissions too! I really want to get rid of the cat, but some people have said that it's best to keep the cat on, so that if u get pulled u pass the check. I was thinking that I could just keep the cat off for the year and just pu it back on for the mot?

[Calman]

to be honest i can see the plods pulling a classic "Because they're all eco nightmares"

[MiniAlex]

to be honest i can see the plods pulling a classic "Because they're all eco nightmares"

Exactly lol. Well I am getting the pipe, stuff them lol. If they pull me over I will just say that i never knew They only will give you a warning anyway!

[chappy]

i doubt that police will have a gas meter in the back of the car...


doubt they'd pull you over just to check your emissions.

[MiniAlex]

i doubt that police will have a gas meter in the back of the car...


doubt they'd pull you over just to check your emissions.

Apparently VOSA pull you over now a days! :?