powerflow exhaust

[black1]

has anyone had any work done by powerflow exhauts in bristol

if so are they any good ?

[Gezzmarrelda]

Try infinity in yate. they're really good!

[ol' dirty]

Going from what Longlife told me, they are not too good, but they are the main competition, so take what you will from that.

Never been so I can't really comment other than... My mate had a full powerflow system fitted to his car & complained it was too boomy after a while.

I have always gone to Longlife

http://youtube.com/watch?v=Ty3zee1k9yQ

Saxs' Stag V8 with Longlife exhaust

Edited by ol' dirty on Wednesday 19th March 16:37

[black1]

Gezzmarrelda said:

Try infinity in yate. they're really good!

i called them monday but boss was out, im still waiting for them to call me back !

[stigmundfreud]

I'd give longlife a shout over in Berkeley. I've had a powerflow before and its hit and miss as to the franchise. Mine was a good weld etc but there was a hell of a lot of pitting and rusting for a stainless product

[agent006]

stigmundfreud said:

I've had a powerflow before and its hit and miss as to the franchise. Mine was a good weld etc but there was a hell of a lot of pitting and rusting for a stainless product

Mine's like that, but without the good welding.

[Six Fiend]

Another vote for Longlife at Berkley.

Did a great job on friends' VR6 and Fiat Coupe Turbo and custom built system on my brother's Del Sol.

[LordGrover]

Are we talking about this: clicky?

[stigmundfreud]

Yep, I had some minor issues which were sorted out - Longlife gave me a good feeling, they did at one time produce the brandged systems for a very popular v8 tuning house

I have my MOT next week, they made me a couple of cats up - if things dont go well at the MOT I'll possbly change my tune but nah the guys were good

[splodge s4]

Longlife did mine, complete custom build:

[pic[/URL][/pic]

I should have knocked them down a few quid though instead of just letting them do it but otherwise i'm very happy with the look & sound, not boomy at all just a deep burble.

Edited by splodge s4 on Thursday 20th March 08:49

[black1]

well looks like its longlife then

thanks for all the replies guys

[Bomber Denton]

How does someone measure such an exhaust?

If you are after a performance upgrade to be honest the likes of Powerflow and Longlife are a waste of time. For an engine to benefit you need to consider back pressure and collaboration of manifold inputs at optimun length.

All I have seen have been half baked knock together examples that make the original mild steel systems look the bks.

If you have a Corsa - brilliant!

[stigmundfreud]

Exhausts hardly ever give any gain on a modern engines (or old) but commbined with a good remap you can gain power quite easily.

And by remap I am on about a custom not an off the peg bullst system. Exhaust + remap has seen me gain 70bhp with runs at Vixpy's to prove it.

Exhausts offer a nice upgrade for the sound alone.

[agent006]

Bomber Denton said:

If you are after a performance upgrade to be honest the likes of Powerflow and Longlife are a waste of time.

So what specifically would you recommend (other than what you sell, of course)?

[stigmundfreud]

agent006 said:

Bomber Denton said:

If you are after a performance upgrade to be honest the likes of Powerflow and Longlife are a waste of time.

So what specifically would you recommend (other than what you sell, of course)?

and do you MOT with your tripple de-cats or do you recat?

[Bomber Denton]

agent006 said:

Bomber Denton said:

If you are after a performance upgrade to be honest the likes of Powerflow and Longlife are a waste of time.

So what specifically would you recommend (other than what you sell, of course)?

I don't sell any exhausts other than standard.

You need to speak to model specific tuners to get the best idea for a performance upgrade, there is no 'one stop' solution.

[agent006]

Why specifically are custom exhusts a "waste of time"?

[ol' dirty]

agent006 said:

Why specifically are custom exhusts a "waste of time"?

Their not always mate, you may get lucky & get a good system made up...but, like Bomber said, they can be worse than what was an already good standard system.

Manufacturers will go to great lengths to develop an exhaust system that will give a decent spread of torque/power throughout the entire rev range.
This (I should imagine) include pulse wave tuning -the use of a back pressure (or a negative pressure wave) to scavenge the exhaust gases out of the combustion chamber, making it easier for the air/fuel mix to enter the CC on the next inlet cycle.

By fiting a larger bore system, changing the lengths of the primary pipes (from the head to the collectors)or by dropping a silencer or two, 9/10 you will lose back pressure- hence a concsiderable drop in torque at a certain (mostly all) point in the rev range.

Your average custom exhaust builder will not be able to test this in his garage- unless he has extensive knowledge of the engine he is working on- he won't really have any idea what it will do to the driveability of the car.

On another note, some off the shelf systems can be just as bad. I had a Scorpion on a Clio & it lost a st load of torque, sounded bloody lovely mind. So its horses for corses, just have a look & speak to other owners & specific tuners to see what they would recommend.

PPC & several other magazines have done issues on pulse wave tuning & exhausts, IIRC Dave Walker is quite knowledgeable on the stuff.

Thats my take on it anyway, can anyone add to that, or correct me if its all bks?

ETA: if you run a turbochraged engine, the loss of back pressure can in some circumstances cause the shaft oil seals to bleed...so not just performance losses to bear in mind, its also mechanical.

Edited by ol' dirty on Monday 24th March 19:39

[Bomber Denton]

ol' dirty said:

agent006 said:

Why specifically are custom exhusts a "waste of time"?

Their not always mate, you may get lucky & get a good system made up...but, like Bomber said, they can be worse than what was an already good standard system.

Manufacturers will go to great lengths to develop an exhaust system that will give a decent spread of torque/power throughout the entire rev range.
This (I should imagine) include pulse wave tuning -the use of a back pressure (or a negative pressure wave) to scavenge the exhaust gases out of the combustion chamber, making it easier for the air/fuel mix to enter the CC on the next inlet cycle.

By fiting a larger bore system, changing the lengths of the primary pipes (from the head to the collectors)or by dropping a silencer or two, 9/10 you will lose back pressure- hence a concsiderable drop in torque at a certain (mostly all) point in the rev range.

Your average custom exhaust builder will not be able to test this in his garage- unless he has extensive knowledge of the engine he is working on- he won't really have any idea what it will do to the driveability of the car.

On another note, some off the shelf systems can be just as bad. I had a Scorpion on a Clio & it lost a st load of torque, sounded bloody lovely mind. So its horses for corses, just have a look & speak to other owners & specific tuners to see what they would recommend.

PPC & several other magazines have done issues on pulse wave tuning & exhausts, IIRC Dave Walker is quite knowledgeable on the stuff.

Thats my take on it anyway, can anyone add to that, or correct me if its all bks?

ETA: if you run a turbochraged engine, the loss of back pressure can in some circumstances cause the shaft oil seals to bleed...so not just performance losses to bear in mind, its also mechanical.

Edited by ol' dirty on Monday 24th March 19:39

Spot on. Don't write all fabricators off, some are real engineers who are damn good at turning out bespoke systems for one off applications. Get a feel for who you are dealing with and catch them with a system they have just done.
The Plymouth Powerflow and Longlife agent's work is very poor down here yet there's a guy (one man band) called Paul who has Ronin Stainless down here who can really put out some tidy work.

[LordGrover]

How about this for a bit of exhaust bling?

Eight into four into two into one! Wonderful piece of craftsmanship.
Topic here