Pinto backpressure

[bmxdave]

Do pintos like back pressure or not?

 

Im sticking a side exit on my car and i was going to just for a straight through with no silencer. I know it messes up fuel consumption but its pathetic at best so i couldnt care less.

 

Otherwise ill have to fit a cherry bomb at a funny angle, im not fitting one of those sidepipe things like a cobra, itd look silly on a pop.

[Guest MK1gaz]

It will be too loud for road use without a silencer mate

[Fiesta Steve]

A decent silencer won't give any more or less back pressure anyhow.

[bmxdave]

It will be too loud for road use without a silencer mate

 

Not for me mate.

 

I ran my triumph vitesse 2 litre for 6 months without any silencers and loved it. The sound of a straight 6 on twin strombergs was brilliant.

 

I always thought that removing silencers and cats can adjust back pressure, things to do with wavelengths etc. I know its 90% about the manifold but i always thought there was an element of exhaust system too.

 

Side exit it is

[Toby]

No engines like back pressure, unless something else is wrong.

 

All engines should be more efficient without back pressure, so should use less fuel, however if you just take the exhaust off and don't have it set up on a rolling road it will probably go worse and use more fuel. Might sound good though - probably not to the neighbours though!!

[X-pack-Glyn]

The only engines that need back pressure to perform better are 2 strokes... 4 strokes the less the better.

[X-pack-Glyn]

 

I always thought that removing silencers and cats can adjust back pressure, things to do with wavelengths etc. I know its 90% about the manifold but i always thought there was an element of exhaust system too.

 

thats called shock wave tuning mate, and ive had far too much of a long day to go into it all right now.

[bmxdave]

Well hopefully soon im getting it rolling road tuned. Anyone know a rough price of how much itd cost for a tune up?

 

My neighbours arent arsed, half of the are so old they cant hear it anyway and the rest just point and say 'i had one of those', every day. Some used to use my Triumph as an alarm clock.

 

I always worked on the theory that if there is back pressure you wont get all of the combusted mixture exhausted, and any gases going out will suck out other old gases. But ive read a few articles and did a little bit of research and some engines can benefit from it. Things like manifold sizing and bends and change where your tourque and power bands are because of the 'waves' of gas exiting the exhaust and building up pressure and bouncing back.

[Wessie]

there are some really good silencers on the market that dont effect back pressure, and i take it you lot are talking about pulse wave technology - its mainly about how long the primarys need to be, how far away the silencer should be mounted, what size it should be etc etc