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There are many posts on this...most who want to modify more heavy prefer to have their cars tuned with a pro or using a edit program.
I like what the unit did for me...I could tell a big difference...I had already had some mods like air intake, modified mass air etc, so when I programed it ...I like what I got.
Anyone want to tell some of their custom set ups they used that worked well?
My friend and I have the exact same Vette with the same mods. (Intake,Exhaust). Except I have the program, and I drove his for the first time and I could tell a VERRRRY noticeable difference. Needless to say he is going to be getting a program as soon as the funds can afford it!
From: After reading this thread, I gotta tell ya... you're an ass. .
St. Jude Donor '05-'06-'07-'08-'09-'10-11-'12-'13
I used on my 2006 GMC 2500 6 liter. I also threw in a K&N. It has better pull off the line @ full throttle, but I lost 1 MPG. It went from 13 mpg to 12mpg on average. It's on my work truck, so I did not have to pay for it. My verdict......Not worth the money for my truck, but maybe for the Vette.
I'd rather get a real tune. Spend the $300 and get a tune that's specifically for your car, not a generic tune. I've had too many cars get detonation from the HPP. I've seen cars pick up 8 hp on the dyno just by taking the HPP tune out and putting the stock tune back in. HPP's are good for gear changes and fan settings. That's about it. I'm speaking from experience of seeing a ton of cars with these.
Last edited by DinoZ; Apr 4, 2007 at 03:37 PM.
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I'd rather get a real tune. Spend the $300 and get a tune that's specifically for your car, not a generic tune. I've had too many cars get detonation from the HPP. I've seen cars pick up 8 hp on the dyno just by taking the HPP tune out and putting the stock tune back in. HPP's are good for gear changes and fan settings. That's about it. I'm speaking from experience of seeing a ton of cars with these.
I have heard that putting the stock tune back is better but have a hard time believing that you loose 8 hp with the HPP ...not sure if it is true....since hypertech shows on there web a HP Dyno sheet from stock vs HPP and HPP is more....also a I raced against friend on a closed track with my 99 coupe with stock settings to his 98 coupe stock and we were close...but then I loaded in the HPP I beat him everytime. Went back to stock and it was the same as the first runs very close....so I have to differ an that. It works for me...but have never done a DYNO
I have heard that putting the stock tune back is better but have a hard time believing that you loose 8 hp with the HPP ...not sure if it is true....since hypertech shows on there web a HP Dyno sheet from stock vs HPP and HPP is more....also a I raced against friend on a closed track with my 99 coupe with stock settings to his 98 coupe stock and we were close...but then I loaded in the HPP I beat him everytime. Went back to stock and it was the same as the first runs very close....so I have to differ an that. It works for me...but have never done a DYNO
The perks about having a dyno... you get to test things like this.
Just like the turbinator... it makes you lose 6 hp and 11 lbs of torque. But they'll tell you all day long that it will give you power and gas mileage.
I'd rather get a real tune. Spend the $300 and get a tune that's specifically for your car, not a generic tune. I've had too many cars get detonation from the HPP. I've seen cars pick up 8 hp on the dyno just by taking the HPP tune out and putting the stock tune back in. HPP's are good for gear changes and fan settings. That's about it. I'm speaking from experience of seeing a ton of cars with these.
That may be true with M6 cars, but not necessarily an A4. Though I'm quite a ways beyond the HPP III now, when I had one, on my intake/exhaust only, A4, I really liked it. I used it for fan setings, as you mentioned, but also for increased shift firmness, increased WOT shift points in all gears and raised the fuel cutout to 6300 rpm. I thought it was effective, and very easy to use, for what it was. I bought it used, and when I began seriously modding, sold it to another fellow who could use it. It sure worked for me.
Ed