Serp belt for underdrive pullies?

[Adrian_Visser]

I have a set of eurosport underdrive pullies on my s52 I am readying to drop in my car. I am wondering what length serp belt I need to run my accessories. This is the 3 part kit with alt pulley, waterpump and PS pullies. Since they dion't deem it necessary to answer my e-mails I am asking here.

[asubimmer]

string and ruler my friend...

[M-technik-3]

Ditto.

[gazellebeigem3]

call em? i called uuc to ask what size belt i needed for mine.

[Adrian_Visser]

The old tried and true method eh you mean I actually have to think for myself wtf.

Thanks guys I guess I'll have to get off my ass and do sometihing myself for once.

[g22]

I have the packaging for the belt that came with my m50 evo underdrive pulleys. If you think its the same I'll get the part number at lunch. Let me know

[BMW_TUNER]

6pk1600 is the average.

at Kragens or Autozone it will be called
4060630

[Adrian_Visser]

Eurosport quoted me a Gates p/n of K060630

or a 6PK1601

dimensions are: 13/16''wide x 53 5/8'' long. Or for the metric world 22mm x 1616mm

Just FYI to anyone who needs this info.

[triggrhaapi]

I always assumed that the hydraulic tensioner just took up more slack with underdrive pullies. Is it really that massive a difference? I don't have them, nor do I intend to. I don't need 2hp nearly as much as cold A/C. I could do with less steering assist.

[Adrian_Visser]

I don't know what the length of the stock serp. belt is. I know eh $250 for like 3hp and 3 lb/ft of tq on an s52 isn't really worth it is it? for some reason the gains on an m52 are alot more though I don't get it. The pullies came on the engine when I bought it so w/e I'll keep em.