matthew2riches
New Member
A straight through is something I'm maybe wanting to do to mine as well.... hopefully someone will post some info up 
I've blanked EGR off already and I'll remove cat after I've made my mind up on exhaust.
I've blanked EGR off already and I'll remove cat after I've made my mind up on exhaust.
jamesmartin
Well-Known Member
you could make your own with welder ,but you can buy straight through pipe reasonably to replace silencer ,will help a little as restricting the exhaust gasses dosent help turbo,more likely to reduce lag although not dramatically bigger intercoolers increase lag
Matt TDi
New Member
I'd agree that no silencers on a TDi is a bit too loud, sounds like an old tank. Back box only is the best compromise.
Having said that, I've had the above on my Disco 300TDI and performance wise I doubt there's any advantage atall.
The exhaust needed changing though, and the straight through middle pipe was cheap enough, and already had a decat, sounds nice the way it is.
Be careful with the bolts at the turbo manifold though, they're a bastard for shearing. Soak them in penetrating oil like plusgas, or even diesel for a while before going at them to give yourself best possible chance. And then cake new bolts in copper grease on refitting.
Having said that, I've had the above on my Disco 300TDI and performance wise I doubt there's any advantage atall.
The exhaust needed changing though, and the straight through middle pipe was cheap enough, and already had a decat, sounds nice the way it is.
Be careful with the bolts at the turbo manifold though, they're a bastard for shearing. Soak them in penetrating oil like plusgas, or even diesel for a while before going at them to give yourself best possible chance. And then cake new bolts in copper grease on refitting.
thebiglad
Well-Known Member
Having tried this on both TDi and TD5 engined Disco's and these are my observations:
1. Works OK on manual box cars but on autos, due to the way the Torque Converter and gearbox work, it's not a nice noise at all. Just a drone. It's so bad the one I bought is in the shed.
2. On TDi's I found that the power and mph were negatively affected by a centre straight-thru pipe.
De-EGR and De-Catting are great mods, but the centre pipe thing I don't like at all.
1. Works OK on manual box cars but on autos, due to the way the Torque Converter and gearbox work, it's not a nice noise at all. Just a drone. It's so bad the one I bought is in the shed.
2. On TDi's I found that the power and mph were negatively affected by a centre straight-thru pipe.
De-EGR and De-Catting are great mods, but the centre pipe thing I don't like at all.
just found this threaqd after as i have just ordered a straight through system for my td5 auto, but ive got ive got the exhaust coming out of the side! it should be arriving tommorow so ill let you know how i get on!
i got my down pipe and centre section from terrain 4x4 in hastings for £135 and my side exit rear pipe from devon 4x4 for £125!
i got my down pipe and centre section from terrain 4x4 in hastings for £135 and my side exit rear pipe from devon 4x4 for £125!
![[JP]](/data/avatars/m/29/29578.jpg?1437394565){kind=avatar}
discool
Well-Known Member
My Janspeed system is not straight through, the centre and rear box have baffles it would be far to loud and my engine wouldn't run correctly if it was, but the throttal responce after fitting was amazing but I doubt if you would see that much improvement with a Tdi diesel engine... Not that I know any thing about diesel
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