Thread: V8 Disco exhaust ideas

Originally Posted by PhilipA

You mean like the standard system on old Rangies?
LOL
Regards Philip A

Ah but they used one muffler with twin pipes, the recipie is for twin mufflers, completely separate (side-by-side). The harmonics from two subtly different pipe lengths is what makes the music.

Originally Posted by bee utey

I can highly recommend a dual exhaust for a V8 with both pipes separate but exiting side by side. It sounds gorgeous, no wurries! N.B. DON'T fit a balance pipe or you'll just have a type of single system.

Better pull the x pipe out of the race car than .
I wouldn't run a dual system without a h or x pipe if set up correctly there are performance gains to be had.

Originally Posted by bee utey

Ah but they used one muffler with twin pipes, the recipie is for twin mufflers, completely separate (side-by-side). The harmonics from two subtly different pipe lengths is what makes the music.

Hi I am going to go with extractors and a twin system right through whats the best size pipe and the best mufflers to use and how many, to get it sounding right. You have got to have that music you talk about
Cheers Peter

Twin 1 3/4 inch pipes, a h pipe as close to the size of the primaries on the headers you choose, 2 hooker aerochambers would be about as big as you would go on an engine with that sort of power.

For actual performance a single 2.5 is more than ample as well.

Just be sure to tell the exhaust place that the system may get really hot in low range work. I recently had one done and it expanded in length almost 20MM in low range work and started banging on the rear crossmember.

I would recommend my RRC system which is stock headers then a 55 series Flowmaster 1 in 1out offset at 2.5 inches , then a straight through offset oval at the back with an expansion chamber. It sounds like a small block chev at low revs but is quieter at higher revs with no drone. Too noisy with a hot dog at the back , but I am an old fart .
You are not going to gain any power with any exhaust on a D1 (except at very high revs) as by then they had muffler volumes etc pretty well sorted.
Regards Philip A

Originally Posted by PhilipA

Just be sure to tell the exhaust place that the system may get really hot in low range work. I recently had one done and it expanded in length almost 20MM in low range work and started banging on the rear crossmember.

I would recommend my RRC system which is stock headers then a 55 series Flowmaster 1 in 1out offset at 2.5 inches , then a straight through offset oval at the back with an expansion chamber. It sounds like a small block chev at low revs but is quieter at higher revs with no drone. Too noisy with a hot dog at the back , but I am an old fart .
You are not going to gain any power with any exhaust on a D1 (except at very high revs) as by then they had muffler volumes etc pretty well sorted.
Regards Philip A

Hi Philip,
I am not after any increase in power just want to get it to sound right the exhaust on it is starting to show its age and wont be long before it has holes in it so I may as well do it now as I am doing all the suspension and drive train as well.
Regards Peter

I cut off the mangled section of exhaust today so i could at least drive it to the car wash and blast off all the dry mud and OMG does it sound like a V8 now. I think with a smaller muffler it should give a sharp V8 sound. I'm thinking until after christmas so I dont spend every spare $ I have i might just get a new pipe fitted to the rear section in 2 inch pipe so I can use it in the new system when i get it done. Definately going to make it 2 seperate pipes in the end with matching mufflers and NO REAR hotdog or muffler, 2 pipes exiting side by side in the usual postion will look sensational

Tomorrow I am going to have a look under a D1 with a stuffed exhaust and see how much room there is for twin exhaust pipes. I think twin 1-3/4 or 2 inch is good, I have used both on P76's and they sound good with that.