paulw

As the title. What is the diameter of an underdrive pulley for a 1.8?

Its a question about the size of it, not about what it will do to an oil pump. I understand that if i fit one it will make the baby Jesus sad and some puppies will also die.

Paul

Joe Perez

iTrader: (8)

43mm, as measured at the lowest point of the groove.

NiklasFalk

iTrader: (1)

With stock being 130mm that's a real reduction (1/3 of stock).

paulw

Its the diameter i'm after that must be the thickness?

Paul

Joe Perez

iTrader: (8)

Nope, the ones I manufacture are 43mm in diameter. They provide a much lower drive ratio than the cheap, aluminum underdrive pulleys you commonly see on eBay. It's almost like the alternator and water pump aren't turning at all.

They're pretty impressive- barely larger than the crankshaft itself.

paulw

Could you show me one fitted to an engine please?

Joe Perez

iTrader: (8)

If I were to post pictures of my revolutionary invention, others would just steal the design and copy it.

You'll have to take my word for it that my pulley improves engine cooling while freeing up at least 10 BHP, improves the longevity of the oil pump gears, and triples your chances of scoring a date with Charlize Theron, all with no negative impact on alternator performance.

I can show you one of the early design concept sketches, though the finished product implements numerous improvements over this early drawing:













Real answer: Is there any one specific pulley you're inquiring about, or were you hoping that all aftermarket pulleys, regardless of who makes them, are of exactly the same dimensions?

paulw

this is why i posted the above, maybe what i should of written is please don't take the **** as its just a question if you don't know the answer then don't say anything.

So i don't have to explain please see my build thread. Space is at a premium and need to reduce the diameter of the pulley to make room for a steering rack.

paulw

And to correct you that's actually a question!

Savington

iTrader: (31)

You're getting trolled because your question makes no sense. You want to know the diameter of "an underdrive pulley" without specifying which pulley you're talking about, or what brand, or any other details that might help us answer your question. If you want a good answer, you have to ask a good question.

Braineack

iTrader: (62)

<p></p><p>Oh yes King Paul,&nbsp;let us all go out of our ways and find your thread to learn about your shitty build because you simply&nbsp;cant ask a question that makes sense.</p>

18psi

iTrader: (76)

I dunno why, but I always laugh when people say "take the ****"....it just makes no sense

concealer404

iTrader: (3)

Please take my ****. In your mouth.

Braineack

iTrader: (62)

<p></p><p>First time I've ever heard/seen that phrase--I thought it was a typo.</p>

Joe Perez

iTrader: (8)

It's a common expression in British english. To "take the ****" roughly means to mock or humiliate someone.


And, to be fair, we have some expressions in American english which are just as absurd. To quote the great philosopher Beavis: "How come they call it taking a dump when you're really leaving a dump? I mean, you're not really taking it anywhere... "

mgeoffriau

iTrader: (7)

You guys taking the mick out of British colloquialisms?

18psi

iTrader: (76)

Beavis

paulw

Well I wasn't expecting that response and also insult. It's a car forum.......
are **** it I was going to be polite but I can't be ****** arsed.....lol it up you bunch of *****. Brain dead! your admit on this forum for **** sake. Show me what you have done on your car yourself or are you too far up your own **** to be able to do so.

It's always the ones that can't do **** all that give the smarmy rude answers.....why because it's easier.

So bring it on dick heads

Paul

concealer404

iTrader: (3)

U wot m8?


It's rather amusing that you're so enraged that you continue to actively not give us the information we need to help you.

18psi

iTrader: (76)