Wide bore exhaust

Have been thinking about the series exhaust and will probably get laughed at for this next comment but worth a shot.

The exhuast on the series is rather small and pathetic I was wondering on the theory of cutting of the back box and exiting it through the rear PTO hole and fitting a cherry bomb or similiar on the back (in effect a striaght through system). I realise this won't make the series faster or anything like that but I am assuming (and probably wrongly) that it should have the desired effect of making the throttle a bit more responsive.

Any sensible criticms welcome? any un-sensible ones will still be read just made to stand in the corner afterwards.

Just to help some visualise the series exhaust system here is a diagram of complete system.

You want more power not less as you won't have any back pressure

I thought a straight through system would be better as bits and bobs I was reading on exhaust less bends and striaghter pipes so I thought no back box and heading straight out the back would be the way to go.

Obviously not.

What would you recommend?

if you do fit a cherry bomb or similar, you will still have a full length system most of which is standard bore, so "backpressure" will still be enough to protect your valves but airflow will be improved, throw the oilbath air filter in the skip (if you haven't already) and replace it with a K&N cone filter or similar, and the overall breathing will be much better.

I've done this (minus the backbox) with my 2.5 petrol 90, but with an SU carb as well. There is a noticable difference in power!

Best thing to do is chuck away the little 4 pot petrol and refit with a 200/300 tdi or be strong and fit a v8 on lpg that will make it move

V8? maybe one day.

No thought this would be a cheap and straight forward mod that as said would improve throttle response a bit with the added bonus of sounding rather nice.

Oil bath was first to go! got the K&N filter that paddocks do not a cone just a standard cyclinder, it is planned on getting moved as well as at the moment it sits directly on top of the carb directly under the bonnet. Problem with that is as the engine heats up so does the air less effecient so planning moving it to top of a snorkel or at least outwith the engine bay so it is getting cold air. suppose its similiar to an iduction kit of sorts ish.

Hi i did this to my old s11 a few years ago was,nt to noisey made it sound a bit like an old MG also was up a bit higher so did,nt get knocked about like old one that was on it

CLUNYKNOX wrote:Best thing to do is chuck away the little 4 pot petrol and refit with a 200/300 tdi or be strong and fit a v8 on lpg that will make it move

just thinking about the the theory of making it move. would I not have to change the gearbox as well for a V8, with it being so low geared would a V8 not rip it to bits?

i have a spare v8 and auto box with a full lpg converstion including a gas tank and trancfer box
GO ON YOU NO YOU WANT TO

Your a bad man!!

GO on you really do want it don't you

come on have you done it yet mate any joy on the work front yet ?

I now have cherry bomb and just trying to work out how to attach it, MOT is on Wednesday so leaving it until after before I start the surgery.
As far as the work front funds have hit an all time low so I am now having to live of your tax's

Prob a good idea to leave of for MOT dont think the tester would like it very much.

Quite right live of the taxes for a while

as long as its gas tight and not ear shattering then you dont have to wait until after your mot

Not sure how loud it will be going from 1 1/2" up to 2 3/4".

Also what is the best way to join old and new together? old end and new end both 1 1/2"

Well have finally got all the bits together and weather and luck permitting I should have a new exhaust system by tomorow night!



Its a thing of beauty.

looking good mate hears hopping it all goes well when fitting it .

You could have taken a beter photo without you boxers in it

You do like your bru mate hard as nails nice exhaust pipe to

why is my mother in law hanging on the back of your door at least his boxers a clean well lets hope so

You know that you are supposed to be looking at the exhaust and not what round about!!

There is no boxers there they are tea towels, Irn bru collection build up over long time keeping forgetting to return the bottels to get money back thought sticking them at the front door might help remind me . . . . it hasn't.

On the back of the door is Morag

It won't be a pretty job but should be effective once completed