exhaust mod

[BUL1Y]

does anyone know what diameter and length of solid pipe i will need to replace that in my silencer? i have the car being done next week and my mechanic wants all the bits to hand, any help much appreciated.

[Big Al.]

IIRC 53mm O/D x 2mm wall, Length not sure, twas too long ago.

[daz the plumber]

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

[clive f]

daz the plumber said:

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

not so, I have straight through pipes in my silencer, and before and after rr sessions showed no loss of bhp whatsoever.

[daz the plumber]

why do the specialists say different?and if you look at the bible it will tell you in detail. the pops and splutters can be wasted fuel

[v8 racing]

daz the plumber said:

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

You dont want any back pressure at all? each psi of back pressure is worth around 2-3 bhp, so if you have 5 psi you could be expected to lose around 10-15 bhp, back pressure is a restriction which ever way you want to look at it, once the gasses have left the chamber if the back pressure/exhuast restriction is holding this back it is putting more pressure on the piston to remove these gasses, so what your engine could be making at the flywheel is being restricted.

[Pasco]

daz the plumber said:

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

[clive f]

do you believe everthing that you read??

[clive f]

v8 racing said:

daz the plumber said:

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

You dont want any back pressure at all? each psi of back pressure is worth around 2-3 bhp, so if you have 5 psi you could be expected to lose around 10-15 bhp, back pressure is a restriction which ever way you want to look at it, once the gasses have left the chamber if the back pressure/exhuast restriction is holding this back it is putting more pressure on the piston to remove these gasses, so what your engine could be making at the flywheel is being restricted.

Daz, this is a TOP specialist, and as you can see he is saying something different

[Pasco]

clive f said:

v8 racing said:

daz the plumber said:

hi, i was going to have this mod done but after i looked in to it and read the bible there can be power loss up to 30bhp.i have found a company who can make a sports exhaust with out lossing any back presure. these guys no there stuff and have explianed in tech terms .rt racing 0114 2817507

You dont want any back pressure at all? each psi of back pressure is worth around 2-3 bhp, so if you have 5 psi you could be expected to lose around 10-15 bhp, back pressure is a restriction which ever way you want to look at it, once the gasses have left the chamber if the back pressure/exhuast restriction is holding this back it is putting more pressure on the piston to remove these gasses, so what your engine could be making at the flywheel is being restricted.

Daz, this is a TOP specialist, and as you can see he is saying something different

[daz the plumber]

is there any sound difference between cherry bombs and just ss sleeves . i think the standard exhaust is a bit bland and the mod to noisy . is there any thing between the two

[clive f]

save your money and just have straight through pipes, there is really no difference between the two

[daz the plumber]

so is there any one who can do the mod near nottingham and when im cruising is it still noisy daz

[clive f]

daz the plumber said:

so is there any one who can do the mod near nottingham and when im cruising is it still noisy daz

if its noisy now it will be about 7 to 10db louder when you have done it, my fully decated 500 griff was recorded at 120db.

[v8 racing]

clive f said:

daz the plumber said:

so is there any one who can do the mod near nottingham and when im cruising is it still noisy daz

if its noisy now it will be about 7 to 10db louder when you have done it, my fully decated 500 griff was recorded at 120db.

Personally i dont like the sound of straight thro pipes but that is only personal prefence as you cant hear what the engine is doing ,pinkink etc.., i would definetly go and listen/have a drive in a car that is fully de-catted with no silencers, you can buy cherrybomb type silencers that have a valve them in them from the states, so while in cruise mode you can use the silencer and when you want it loud you shut the valve, may be worth looking into these.

Edited by v8 racing on Friday 9th November 20:22