cool now how can i buy them hehehehehe

 

Im sold and Ihavent even bought my HHR yet.
i did the smaller pulley on my Impala SS but its a 8cy so the gain was very small if any but I did it anyway in the hopes that with the other mods it would add something
Later
Bernie

 

-MD-HHR.....

I know Hutter Performance, who performed your dyno tests.. Strong, reliable, honest, knowledgeable people. They tend to do "things" the right way (had them do some work for a previous employer, some years ago...they were requested because of their expertise).

For those interested, I suggest you go to Hutter's website and review their dyno procedures. For example, and I don't wish to "whip a dead horse", but they do their pulls with the hood closed and HD fans blowing into the cooling area......not with the hood UP, which provides BEST CASE SCENARIO AND INACCURATE DATA.
That is the way I have participated and witnessed hundreds of dyno tests.....contrary to what was stated previously, in this forum. This method provides a more accurate account of actual "road" experience.

So I guess, at this point, I'm a believer of lighter/smaller is better (until proven otherwise).

 

That wouldn't make any kind of sense at all, performing a dyno with the hood up. You want to know how the vehicle would perform under natural conditions, not ideal circumstances. I don't know about you all, but I like to drive with my hood down

Now a few knowledgeable people "approve this message," which makes it credible in my eyes.

 

My intent, was not to rehash that issue. So, let's not start that again. Only to indicate the method employed by the initial provider of the service data.

 

I didn't know that had been an issue in the past. My bad...

 

I have never seen a dyno done with the hood closed...ever.
Where are these procedures you speak of?
Link to Hutter Chassis Dyno Page
Also how would the dyno be inaccurate with the hood open?.....and if it was it was done the same way before the pulleys and after the pulleys.

 

Technically, if you did both dynos (before and after) with the hood open, it should show the same ratio increase in hp as with the hood down. More airflow because the hood is open, however, might change the end result to be different from normal driving experience. That's my guess...

 

I used the word "procedure" and shouldn't have. I was referring to the picture details displayed on their website. Several appear to be under test with the hood closed and a fan in front (also front overhead door slightly open).

As far as data....didn't say the dyno was inaccurate AND I SAID NOTHING ABOUT THE PULLEYS.....at this point, as stated, I believe you and others, about the pulleys.

I said the DATA could be inacurate (in some cases, dependent on what is tested). For example, if a comp is made between OEM intake and an aftermarket intake, and the hood is open, you do have a comparison. But, a hood open revealing the exposed air filter, is a little slanted. And provides more "unrestricted" direct cooler airflow, than it would to an OEM that requires air to move through a "tunnel" to get to the air box. I'm not saying there is nothing gained. Just saying the gain, in real life, may not be what is reported...

Again, I am not challenging the statements regarding the "release" of HP to the rear wheels...I believe it.

The dyno tests that I witnessed, were performed in a barometric chamber, that controled the temperature, humidity, pressure, and wind velocity, etc. The instrumentation had the ability to duplicate, essentially, any city in the world on a given day..... and the hoods were down. It's the same method used to provide and certify EPA Mileage standards for any given vehicle (I heard, they can duplicate rain storms as well....but, i think they may have been pulling my leg, with that). Probably terribly expensive to build, so the availability is limited in the aftermarket world.

 

Either way. Md was right, as were us "youngins" and MD was able to PROVE this. Way to go MD for an outstanding product.

Now there's only one question left. Where can I find these wonderful pulleys MD???? If need be PM me any info. And thanks again! :twothumbs