Nope. It was well posted when this mod first came out how it was a big IAT reduction for just a bolt on and you'd get more boost out of it. If you take the option to keep your same pulley size your IAT's pretty much stay the same with a small boost increase. They tend to be slower to rise on a short blast and by the time you run through the quarter simple mechanic's of more pressure=more heat takes over and you end up with the same IAT rise. If you desire to keep your boost level the same and just pulley down a bit you can gain a bit lower IAT simply from spinning the blower a bit slower. I've done this mod a few times and logged the before and after.

 

You are wrong...very wrong. It is called pumping losses, and when you lower those pumping losses the temperatures will be lower. This testing was done by GM, EATON, Magna Charger and several other independent labs and each verified the others findings. Simple math, you might want to try it, temp drops 15-20* lower have been documented by all of the above mentioned companies.

 

I'm well aware of how pumping loss's work. I'm also aware of what my testing and pretty much all of the other posts on here when it came out showed. In short bursts the IAT's would rise slower. In a long run such as a quarter mile pass they were no different. When a goal is set for a boost level such as a manufacture would use (about 6psi) if you change your throttle body size to a larger unit you in turn would slow the blower speed down and return the boost level to the same. This will net you lower IAT's. For example a 3.3" pulley with the 90mm throttle body will make about the same boost level as the 3.1" pulley and the 78mm throttle body except about the 15-20 degrees cooler as you've found. Keep the blower spinning the same speed (no pulley change) and in a long pass it isn't going to show a difference. This basicly means that you can see a drop in IAT's if you are happy at your current boost level and re-pulley to keep it at your current boost level and take the higher blower efficiency with the larger throttle body and lower your IAT's. Lets see your documented tests. I have logs of runs and I can probably dig up the posts from others on here.

 

I am well aware of your tests....and your tuning. Our product speaks for itself, and the many satisfied customers that use, sell and install it. Your testing being uncontrolled carry no weight in your argument. The findings have been posted before, and many have seen the gains discussed. In fact each time the charts are posted you are the first one to comment about them. I will end this argument with this thought....400,000+ satisfied customers must be right If you have the knowledge that you claim, you know the data is accurate. If you have the industry contacts that you assume you do, pick up the phone and call. I am sure the GM engineers will be more than happy to quantify the findings.

The Rep.

 

You're too quick to feel the need to defend your product. The Magnacharger product is not in question. The Radix is a great piece with alot of satisfied customers and rightly so. I'll tell everyone on here how great I think the Magnacharger products are that I've used, recomended, installed, etc. You put the word tuning in special letters, oooh. Alot of the customers that have bought Radix's are very happy with their products due to my or others that have tuned their vehicles. I'd like to see where companies like Eaton and GM are doing extensive testing on their blowers that are being spun to 16,000rpm and higher.

In referrence to the actuall issue in the post specificly at hand, where is the 400,000 satisfied customers coming in here to say that they put on a 90mm throttle body and it dropped their IAT's 15º-20º? I'm always quick to be attacked when I post a comment or finding and have admitted when I'm w**ng if that is the case. Before you attack at me who has helped at times sell Magnacharger products, prove what I say is w**ng.

 

Zipper, I have posted the findings in the past....and the results will always vary. In an uncontrolled environment findings might be way off. Settle down rough rider, its just the internet.

 

I live in an uncontrolled enviroment and I can tell ya...I am always off yet I still live by it.

 

I can agree with that. Sometimes a controlled environment will show a consierable difference from a natural environment. You know me well enough that I don't post things like that from a one time what I found kind of deal. I also find alot of times differences in results from initial testing of a product to be considerably different when you take the product to it's limits as many on here have done. Either way it should be clear that I'm not shooting the Magnacharger product down at all. I've installed them, sold them, recomended them, recomended parts for them, recomended surrounding parts for them, etc. I'm a Magnacharger fan and probably always will be. Thanks for the repsonse Brian.

btw, I'm going to be at SEMA this year for the first time.

 

Damn it, I want to go to SEMA....

 

me too