Best tailpipe for power

[BRUN]

does it actually have any effect at all ?

and if it does what would the best one to go for be ?

 

[Rick]

It does have some effect, although IIRC, a 3" tailpipe only becomes a restriction on performance at about 250bhp.

 

[Rick_172]

Tailpipes have absolutely NO effect on power, and will give you NO gains what so ever. They are purely for looks, and the back box is for sound and note.

Only a full system will give you power increases, and these will be minimal unless coupled with a decat pipe. The cat is the most restrictive part of the exhaust system, and only removing this will give you power increases.

 

[Rick]

I didnt say it will GIVE you power, I was saying that at some point it becomes a restriction to the flow of the exhaust gases if its too narrow.

 

[steve a]

thats only the bore not the tail pipe.

 

[BUTRE]

BRUN, assuming your GTT lump is somewhere in the 200bhp, you can go with from 2.25 to 2.5" on the tailpipe.

I would say that 3" is too much for a 1.4lts engine. It will kill by a little the low rpm.

I wouldnt go any further than 2.5"

 

[BRUN]

i was jus wonderin thats all

i do plan to have a 3" minimum tailpipe when i have my powerflow system fitted in 2 weeks.........

the entire system will be 2.25" bore and im gettin the larger turbo elbow and have already ordered the 2.5" turbo pipe......

 

[Ben H]

The actual diameter of the stainless system on my Williams was exactly the same as the standard system I changed it for.

I had braced myself for a slight loss of power by returning to standard, but thats not been the case. I conclude that the de-cat is the only real impediment on a 16V or Willy - probably the same on most cars.

 

[Rick_172]

are we talking about tailpipe diameter here or the actual diameter of the system? They are not always the same. Obviously.

 

[BRUN]

i was askin about tailpipe.............if the shape or size is at all a contribuying factor in the power stakes..........i dont think they are but thought id ask

 

[word_easy]

Quote: Originally posted by Rick_172 on 01 February 2004


Tailpipes have absolutely NO effect on power, and will give you NO gains what so ever. They are purely for looks, and the back box is for sound and note.

You can lose back pressure if you have the wrong bore backbox fitted! so the backbox isnt just there for sound and note!

 

[Aaron172]

supersprint are good for power increases .A cat back system would give you a small gain