Back pressure or no back pressure.

they dont need back pressure .

na's need a certain amount.

thx mate just had to clear that up

they dont need back pressure .

na's need a certain amount.

 

 

ARE you 100% on that bud ....???????

 

 

..

Q: What do TTs need?

 

A: Petrol and lots of it! :rofl:

No engine needs back pressure (apart from 2 stroke). Its a lot more complicated than that....

low back pressure with good flow is what all engines require, na or tt!

Pulse tuning theory... lets not even go there :D

sorry guys just needed to know, coz im putting together a few things what i want from an exhaust. lol

Hideously loud by the sounds of it! :rofl:

back pressure wont help on a turbo engine. as andy mentioned you can use the exhaust to counter the imbalance or pulses or gas as the exhaust ports open and shut and if you're really good you can get them to help scavenge from the inlet side better too. on a turbo engine this will have mostly no effect after the turbo (but good manifolds help spool up) and the loss of flow outweighs the gain. also as andy said, its so complex that you'd need at least 5 degrees in quantum physics to start and get a gain which will only usually be of benefit in a certain set of rpm ranges (the resonance changes with pitch of pulses so if you set the exhaust to work well at 2,000 and 4,000 it will usually work well at 8,000 and 16,000, etc).

the only other thing is if you're running stock turbo's. no back pressure then will mean seal failure sooner in most cases.

Hideously loud by the sounds of it!

most likely but dont you think turbo's through open pipes sound luuuurvly? whooooosh. mmmmm. :)

leon is now helping me out on saturday so he will answer all my questions and do a very good job im sure.

 

karl

The theory that n/a engines need backpressure has come about because people have swapped their standard systems for free flowing jobbies, and then found that the mixture is all wrong, so the obvious conclusion is that the engine needs backpressure.

Really it's just the fuelling that's been set up for an engine with backpressure. If you remove the backpressure, and re-map the fuelling to suit, then you'd have more power.

 

Also you can still have the benefits (if there are any) of pulse tuning without backpressure. They are two seperate things.

The theory that n/a engines need backpressure has come about because people have swapped their standard systems for free flowing jobbies, and then found that the mixture is all wrong, so the obvious conclusion is that the engine needs backpressure.

Really it's just the fuelling that's been set up for an engine with backpressure. If you remove the backpressure, and re-map the fuelling to suit, then you'd have more power.

 

Also you can still have the benefits (if there are any) of pulse tuning without backpressure. They are two seperate things.

cool so i can decat mine remove the middle silencers and get it chipped etc and i will gain more POWER yey :dance:

oh btw gave myself a slap :slap: and won't bother trying to help any more :rofl: