MTU vs Velenta

Anonymizeruk · Post by **Anonymizeruk** » Mon Dec 11, 2006 1:36 pm

MML powercars have a mixture of Valenta and VP185 engines. Not sure of the exact number of each, but as far as I know, its a pretty equal spread.

salopiangrowler · Post by **salopiangrowler** » Mon Dec 11, 2006 2:13 pm

well if you want to know the difference JR the Valenta's sound tinnier than the vp185 not by much though.

phill70 · Post by **phill70** » Wed Dec 13, 2006 10:10 pm

Rfairlie wrote:
allypally wrote:All Aussie powercars have been reengined.
Don't they have Paxmans replacement for the Valantea, the vp185 in them rather than MTU's.
Tim

VP 185 is quite correct.

CSRZiyang · Post by **CSRZiyang** » Sat Jan 06, 2007 6:00 pm

salopiangrowler wrote:Grand Central are having some HST's and have not mentioned MTUing them. as i got told with the DRS 37 modification's its either you accept and keep them on the mainline for another 15 - 20 year's or loose them for good.

Valenta fans will be pleased to learn that Grand Central is indeed retaining the original type of power unit for its fleet of six Class 43 power cars. We (I'm currently supporting GC in the role of Fleet Engineer) are fortunate to have a wide choice of engine blocks to choose from (courtesy of the MTU re-engining programme) so hope to be able to end up with the best engines possible.

We will make some modifications from the original power car specification, namely: -

replacing the original type SA084 turbochargers with Siemens type 256, which allow the engine to run cooler whilst giving great performance;

improving the couplings between the engine and cooler group;

installing "single bank" firing, which means that when idling, the engine only runs of one of the two banks of cylinders, saving fuel and producing less exhaust emission (particularly smoke).

We are also doing a full re-wire, installing OTMR and generally overhauling the units, including (obviously) corrosion removal and re-livery.

Hope this is useful info.

jimmyladd · Post by **jimmyladd** » Sat Jan 06, 2007 6:36 pm

CSRZiyang wrote:
installing "single bank" firing, which means that when idling, the engine only runs of one of the two banks of cylinders, saving fuel and producing less exhaust emission (particularly smoke).[/list]
We are also doing a full re-wire, installing OTMR and generally overhauling the units, including (obviously) corrosion removal and re-livery.

Interesting stuff! Paxman many years ago produced a 6 cylinder version of the RPL series V12 that was basically a V12 with 6 pistons in one bank and a flat plate instead of the cylinder heads on the other bank. Quite a few early diesel shunters have this engine fitted.
Jim