Possible to gain hp but lose speed?
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Possible to gain hp but lose speed? - 2/15/2006 10:50:06 PM
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strongboy2005
Posts: 170
Joined: 1/28/2006
Status: offline
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Ok here is my current dilemma: today I tested my Hypertech with high octane gas using the low octane fuel setting. This worked wonderfully, and I gained pretty good noticible power (my figures said 15 hp, but it was probably less). Here is my problem though. I just finished testing quarter mile times and my times were significantly worse... I just don't understand...
The numbers:
18.15 sec @ 73.3 MPH
17.97 sec @ 74.3 MPH
17.72 sec @ 76.8 MPH
17.95 sec @ 74.9 MPH
17.94 sec @ 75.1 MPH
Avg and stdev: 17.95 sec +- 0.15
I don't like doing too many quarter mile runs at once on my motor, so I decided to set it back to stock and give it one stock run to see if there's a difference.
Stock run: 17.73 sec @ 77 MPH
I really don't see how this is possible. I had honestly expected low 17s so this came as quite a shock to me. When I first brought home the car, my friend and I (both in the car) were running better times than just me in the car running premium gas... Could this be indicating that something is going wrong?
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2003 LS (4-door) Chevy Blazer 4.3L 2WD GU6 G80
http://www.cardomain.com/ride/2257682
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RE: Possible to gain hp but lose speed? - 2/16/2006 4:35:45 PM
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strongboy2005
Posts: 170
Joined: 1/28/2006
Status: offline
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Answered my own question...
I set the Hypertech to the power tuning 87 octane and let it sit out there for about an hour. I then took it out to g-tech it. These were my results:
1st run: 18.22 sec @ 73.4 MPH, I was highly discouraged from this run, because it was so slow and indicated that the wait hadn't done anything to "fix" the tuning. Anyways, I was going to just leave and not test anymore, but I decided to try it one more time...
2nd run: 17.41 sec @ 78.7 MPH, my new fastest time... Now I was getting interested... So I ran it again...
3rd run: 17.37 sec @ 78.2 MPH, my new fastest time AGAIN... Ok, so now I was pretty excited and ran it again...
4th run: 17.17 sec @ 80.6 MPH, good Lord... I broke 80 MPH...
Yeah, it was a good day. I have come to the conclusion, after all these tests, that the car's computer takes a little time to accept the power tuning, so back-to-back switches from stock to power tuning are very misleading (by quite a bit). I can now safely say that I would recommend the Hypertech. On premium fuel it took off approximately .25 seconds from my quarter mile, on average...
Hopefully I don't change my mind in the future... It's been a hard few weeks testing this thing...
< Message edited by strongboy2005 -- 2/16/2006 4:36:09 PM >
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2003 LS (4-door) Chevy Blazer 4.3L 2WD GU6 G80
http://www.cardomain.com/ride/2257682
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RE: Possible to gain hp but lose speed? - 2/16/2006 5:13:08 PM
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ivannj
Posts: 321
Joined: 11/2/2005
Status: offline
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The time I took my hypertech off and drove off The firmness of the transmission was still there for a couple of minute and took a while for it to run better too like it lost life but a couple of days later it felt better the blazer. Then I put the Programmer on and that was that. I think you might be right about the programmer. GIve it a couples of days before you test. FYI put a octane boost too that helps plenty.
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97 Blazer LS 4wd 4.3l 2dr 71,000 miles
E-fan, Low Drag Pullies, Intake, Gibson Exhuast, B&M Deep Tranny Pan, B&M Shift Plus, Hypertech Tuner, TB Spacer
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RE: Possible to gain hp but lose speed? - 2/16/2006 9:14:53 PM
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lovetheblazer
Posts: 91
Joined: 11/11/2005
Status: offline
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quote:
ORIGINAL: strongboy2005
Answered my own question...
I set the Hypertech to the power tuning 87 octane and let it sit out there for about an hour. I then took it out to g-tech it. These were my results:
1st run: 18.22 sec @ 73.4 MPH, I was highly discouraged from this run, because it was so slow and indicated that the wait hadn't done anything to "fix" the tuning. Anyways, I was going to just leave and not test anymore, but I decided to try it one more time...
2nd run: 17.41 sec @ 78.7 MPH, my new fastest time... Now I was getting interested... So I ran it again...
3rd run: 17.37 sec @ 78.2 MPH, my new fastest time AGAIN... Ok, so now I was pretty excited and ran it again...
4th run: 17.17 sec @ 80.6 MPH, good Lord... I broke 80 MPH...
Yeah, it was a good day. I have come to the conclusion, after all these tests, that the car's computer takes a little time to accept the power tuning, so back-to-back switches from stock to power tuning are very misleading (by quite a bit). I can now safely say that I would recommend the Hypertech. On premium fuel it took off approximately .25 seconds from my quarter mile, on average...
Hopefully I don't change my mind in the future... It's been a hard few weeks testing this thing...
Is your truck stock right now?
I got those numbers when mine was fully stock and needed a tune-up...just asking 'cause the last time I went to the track after doing a complete tuneup I got 16.1s @ the 1/4 mi and I only have: custom y-pipe, msd blaster coil, fipk 2, performance muffler, gutted cat and throttle blade mod.
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