Ok I know I might get flamed for this, but I have officially proven (at least to myself), that the Hypertech tuning does not add horsepower, but, rather, takes away power...

I just finished my testing of the Hypertech with my G-Tech to see if the G-tech could feel a power difference. To begin, I know these numbers are going to look really low, but it's not the numbers but instead their relativity to each other that I'm concerned with... On to the tests...

I began by running three practice runs to get my engine heated up. After all, I was going to do 10 runs, so by the 10th run it was going to be pretty hot. I wanted the results to be as accurate as possible.

My first 5 numbers were as follows:
125HP
127HP
122HP
118HP
116HP

Average with stdev: 122HP +-5HP

I then proceeded to run with the Hypertech tuning installed. Again, I know these numbers are unrealistic, but the relation of the numbers to one another is what is important. I took all of these tests in a constant environment, using the same procedures each time... The only difference is the power tuning...

Numbers with Hypertech tuning installed:
112HP
110HP
111HP
111HP
117HP

Average with stdev: 112HP +-3HP

I was genuinely astonished at the numbers. I had lost 10 HP! I didn't believe it so I began rationalizing it in my head... I thought, "Well, maybe the engine was cooler during the first run, now it's really hot and that's messing up my numbers..." There was only one way to find out... Run the stock tuning again, 5 more times...

Second stock run:
125HP
117HP
117HP
124HP
111HP

Average with stdev: 119HP +-6HP

This still indicated a 7HP drop with the "Power" tuning...

Please let me know if you see a flaw in my procedures...
http://www.geocities.com/strongboy2005/hypertech.xls

 

DId you install it with a 160 stat if not did you tell it no. Did you have 92 octane gas in fuel tank already? I gotten more hp with it and did not need a dyno test to realize. Its funny cuase I took it off the other day for car inspection and my wife said that my blazer seemed to be slower than before without her knowing that it was off.

 

No, I didn't change to a 160 stat... It never asked what thermostat I was running...

The programmer asked what octane I was running, I told it 87... Both tests used the improved shift points and firmness (So I could hit my full RPM range, even though the peak should be around 4800)

 

It should have asked you cuase mine does. I am going to check that out. What was your temp? I know when my blazer get around 200 it acts different then I hit the efans and gets to 165 and runs better.

 

My stock guage indicated about 210... Correct me if I'm wrong, but the lower temp thermostat should just open up earlier and not allow the engine to heat up as fast, but the engine will always eventually get to it's normal operating temperature, no matter the thermostat...

Edit: I didn't do ANY runs until my guage reached 210. Then I ran three, WOT, runs... Then I did the first 5 stock, second 5 with hypertech, and lastly the final 5 stock...

 

Yes your right But the stock stat opens at 195 so your engine will be 200 deg. THe 160 deg opens and gets cooled so it will stay cooler than a 195. When a 195 opens and then gets cooled it will close @ 195 not letting the coolant to be cooler than 195.

 

Ic, so you think the hypertech would post better numbers with a lower thermostat?

If I test it again, I will do 5 stock runs with the lower therm and 5 with the lower therm and the hypertech. If the stock numbers are lower, I will end my testing, if the stock numbers are still better I'd do 5 more runs...

With this procedure, do you really think the Hypertech will gain over stock? Right now stock is boasting 7-10 HP better than the Hypertech...

 

Make sure when you test it that the temp is 160 to 170

 

See, I don't understand what that has to do with the tuning... I did all the tests at the same temp...

My hypertech doesn't ask what thermostat I'm running (PN 30019)

 

Interesting test. I tried the HPP3 on a s10 pickup (with the 4.3L) a few years ago and was less than impressed... Even with the 93 Octane mode there didn't seem to be any improvement whatever. Amazing that it actually REDUCES the performance... what a deal! [sm=smiley21.gif]