General TD04 questions

[cwspellowe]

- spool times?

TD04 is designed for higher revving petrol engines, can appear laggy with spool near 3krpm but if the pump is gov modded, these XUD's can rev to 6k and make use of the blower. If the pump's not had the gov shimmed though they're a bit of a pointless upgrade.

- reliability? (Any blown engines?)

Not really common, at least not associated with this particular blower. Some XUD's have a habit of throwing rods but noone can 100% say why. Some spit them at just over idle, some throw them at 5krpm under boost. Mark Airey has had his TD04 on for a couple of years running 30+psi with no issues so far, touch wood.

- power/torque figures?

Common outputs seem to be in the 170bhp mark and 250+lbft

- why are some people welding the wastegates? Is it purely a space issue? Surely having no boost control is a bad thing?

Space issue, common TD04 orientation can make them awkward to fit behind the engine with the actuator on, but some have managed to squeeze it in. Having blown a de-WG blower by overspeeding myself i'd never do it, but the TD04's are pretty bulletproof and can eat monster psi.

Yes though, no boost control is a bad thing, even a bleed valve doesn't stop overspeeding of the blower, which is what killed one of my GT's.

- what are they like to drive with, a lot of fun I expect?

Quick, will eat GTI6's for breakfast with their torkz, and they sound like jet engines. Plus CJ and Jenks make bolt on bits for the blowers to strap them to the engines. £50 turbo + £25 oil feed + £60 adapter plates = 170bhp XUD for under £150. Not many cars will make that pound for pound increase.