Vehicle & Technical > Range Rover

removing centre box 35i

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dave1968:
thanks mate ill give it a go this week

Range Rover Blues:
IIRC the twin pipe system was designed to allow better gas flow and release a few extra horses, but the best sytem is the 3.9 EFi, biggest of the lot, with good gas flow if pre-cat and not much between that and my Double S sports pipe.

For a cheapy system ours had a TDI centre box (straight through unlike the EFi one) and no back boc, just the pipe, sounded great when the engine was on-song but terrible when it started to do valves.

dave1968:
theres a 3.9 being broke in local scrapyard just got tow bar off it it had stainless exhaust system on it but thats gone will keep my eyes open for a 3.9 system why did valves go thanks dave.

Range Rover Blues:
I think a combination of too high a compression ratio and lack of lubrication when on LPG, that said they always seemd to burn out after a hard drive on petrol.

Doesn't do it any more since I rebuilt the heads.

P.S. one thing you might find if using a 3.9 system without modifying is that the gearbox crossmemeber is different.

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