AZIPOD

Just got my 180mm ASP pulley from LET! It is humongous!
I guess I'll be "working" this weekend....

dpavid

Is the 180mm LET Pulley the same as the ASP version? Is it private label or something?

BenzoBoi

You will hear the blower whine like no tomorrow! I have a 180MM from HYEVON Motors and everyone always tells me my car whines like no tomorrow when I get on it. It's intoxicating I tell you!

bobgodd

Sound clip por favor?

bassn_07

Sun - Sweet a$$ signature

AZIPOD

It is a ASP pulley. It's built on the stock one.

AZIPOD

How's your temperature running? Is a H/E and Johnson CM30 pump enough to keep it cool ?

BenzoBoi

I'll be getting one done very soon! I'll keep ya posted
Thanks Alan!
Yup. I have a lil extra kick for my cooling set up but the upgraded H/E and the CM30 is good enough for daily...

ChicagoX

LET is an authorized ASP reseller.

We also offer our own pulleys, in two sizes.

MJ50

can't wait...

RonnieRenaldi

What's the difference between LET and ASP pulley?

AZIPOD

The ASP pulley is made by ASP.
The LET pulley is made by LET.
I don't believe the LET is available yet.

Sorry if the title of my post was confusing.

Ohbev

What 2 sizes do you have and how much boost do you get from them over stock ?

AZIPOD

You want to do a TUNE with your pulley. The pulley in itself yields a gain, but you can get a far greater gain in power if you did the tune as well.

Ohbev

yea i no it works better with a tune bit i just want to no what 2 size pulleys let have and how much boost over stock do u get from the pulleys

jangy

Actually, you lose power and gain bottom end grunt with a larger pulley if no tune is done. The car doesn't like any psi over 14 AT ALL. Ballpark, 180 gives about 16psi.

oslowley

I ordered a pulley in conjunction with a custom dyno tune and a cm30 pump. Will install next week so we'll see how much power it will produce.

ChicagoX

The LET pulleys are 172mm and 180mm.

There's about a 1.6 PSI difference between the two, measured from a tap in the surge tank.

Absolute PSI measurements depend on the parts installed on the car, since it is a measure of restriction. A free-flowing setup will register less overall boost but make more HP and less heat.

AZIPOD

How is a less restrictive free-flowing system yielding LESS boost? Is it not the other way around? Maybe I'm thinking about a Turbo....... me confused!!

jangy

When I added the larger pulley, it added boost and heat. But, then I added headers and the psi dropped (less back pressure) but my power went up. There is a balance between the boost and the backpressure.

In a highly restrictive setup, the blower will generate more pressure (psi), but will also have inefficiencies (heat) that make the power gained a function of diminishing returns. In the end, you may have 16psi that generates Xrwhp but also adds much heat.

In a low restriction setup, the psi will be low even if the pulley is huge and spinning hard because it has nothing to "push" against. In this case, the SC may not make as much heat but instead the air doesn't flow well so we lose in efficiencies.

I'm in the process of openning up as much airway as I can with the hopes of finding that sweet spot. I have been hunting for a huge TB for a while since that is the big "restriction" in my car. The point comes though, when the car gets lag from all of the free space that it has to compress each time...

c32AMG-DTM

less restriction post-blower will yield lower boost. That's an important clarification, IMHO. All else being equal, less restriction pre-blower might actually raise boost levels experienced/recorded, AFAIK.

FWIW, you will also notice substantially different actual boost levels in different atmospheric conditions. Datalog at sea level in dry 45 degree air, and again at 2000 ft in humid 80 degree air, and you'll observe dramatically different boost measurements recorded.

jangy

Nice clarification

AZIPOD

If I add VRP shortie headers, but keeping the stock mid pipes and exhaust will it be a good start than stock headers? Will I need a re-tune of the ECU once I add headers?

NSX2NV

So getting a tune will take car of this problem right?

jangy

It really depends on the tune you have now, but most likely you will want to retune for optimal.