I would like to know the same thing.
The only thing I've gathered is that -md- HHR makes them, because he has a bachelor's degree in Mechanical Engineering (pretty cool btw )

Other than that... we need info PLEASE!!

 

I hate getting into a pissing match, so let's agree to keep it civil and to the point.

Crankshaft at 1/3 the weight?? Don't think so, unless you built it out of hollow aluminum, which would only last a very short time.

As far as the HP claims, what else was changed in your before / after tests? Complete rebuild, larger bore, new rings, just new plugs, etc.?? As for the HP claims based upon pulleys alone, I will flatly state that it is impossible! I said it bofore and I'll say it again... When you are measuring HP or torque on a chassis dyno, EVERY rotating assembly, from the front of the engine, to the internals, including the reciprocating mass of the pistons and rods and the rotational enertia of every component, from the alternator, any pulleys, crankshaft, cams, gears, balance shafts, flywheel, torque converter (manual or auto), every transmission gear, driveshafts, hubs, brakes, wheels and finally the tires, comes into play on the total rotational mass enertia that has to be overcome to accelerate the vehicle. The drive pulleys are such an infinitesmal component of this that any benefit would be nearly immeasurable!!

If you want to flaunt your claimed degree, you missed some important principles. If you're trying to "trump" me, I'll just state that "my degree is bigger than your's", and I was building race cars and engines long before your parents thought of having sex. So, let's not play that game.

Unfortunately, there is so much myth, lore and outright BS put out from false advertising, then friends telling others that "I have read..." or "I have heard..." that the average person actually starts believing and if they buy into it, convinces themselves that "Yeh, I can tell a difference...".

And, finally, some are asking how to buy this... Better look into becoming a Supporting Vendor here soon. Then you can make any questionable claims and sell your product to the masses.

 

Sorry, that don't count.

 

When it comes to parasitic losses, GM pays a lot of attention to that these days to maximize fuel mileage. Alternators are sized to the minimum required. The water pump in the EcoTec is driven off the crank via chain, not the serpentine belt. Power steering??? Hey, look under your hood! Do you see a power steering pump? Nope, it's an electronic assist, with less drag and loss.

Sorry, man, you bought into this and are trying to convince yourself and others that it makes a difference.

 

I once heard there are magic dyno tabs that they had at SEMA that give your HHR like 50 HP when you drop them in your gas tank.

 

I don't think that Mike from the defunct SoCalHHRs claimed that much of a gain from Dyno-Tabs, but your point is well taken, and an indication of his "expertise".

 

Very well said sir

 

I was stating this info from another vehicle. I KNOW the HHR has electirc PS on it. I'm not a moron. These claims for pulleys on the alternator and crank have been proven time and time again. And if you're "I've been building race engines since before.." attitude is all you can come back to someone with then I feel sorry for the drivers of the engines you made. When dealing with a 4 cylinder engine ANY rotatational mass you ease from an engine will make a difference in power. Maybe not in a V8 since you have a mass amount of torque and power difference from a built engine OVER what these little engines are making. You wouldn't see as much from a V8 since they don't have to work as hard to make power. They do have twice as many cylinders and more than twice as much displacement. I dont expect and OLDER gear head to believe what these smaller engines are capable of doing with small changes in them.

Try writing to Sport Compact Car with your muscle head BS about pulleys NOT making power and see what kind of response you get. But I'm sure the readers of popular hot rodding, muscle car, or any "v8" mag will agree with you. SCC magazine has plenty of articles as well as DYNO RESULTS performed on DYNAMOMETERS that SHOW a PROVEN GAIN to wheel horsepower numbers by changing to a underdriven or lightened pulley setup. Some with NO MODS other than the pulleys or some with simple bolt ons. Just because you have never seen it doesn't mean it doesn't work.

Whoever you are you need to keep with up and coming times, cars, and modifications. "An average of 2.7 HP is gained from every pound lost off the crank shaft." You can read the rest here...Unorthodox Racing Pulleys

 

Man.....this is a good debate.

One side has me believing, then the other side.

Who's turn is it now keep it going with good info.

 

Hey............there are some of us younger guys are like that. I admit that there are some high output small displacement engines but they're special built. I don't expect much HP out of the HHR via bolt-ons. I'm not joining the pulley debate though.