quick question
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94gts
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MysteryMachine
Active Member
94-302-vert
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and the mph is always high on one of these as it will give the instantaeous mph at the 1/4 mile mark, not an average over the last 60' like at the track.
Zero Signal
Active Member
Yeah I'd say with those mods, you would be looking at under 100mph for the 1/4 so id definitely read fast there. The 1/4 time however looks reasonable.
1994Vib.RedGT
Member
ok: here it is man
Bone stock dyno: 192 RWHP 258 RWTQ
I add a CAI, Cobra Intake, 70mm TB, better plugs, bassani o/r X, MAC shorties, 3.55 gears.
I run the G-tech meter, register a 14.01, not too bad, I look at HP, its telling me I have 158 rwhp, something is way off there, seeing as how I dynod 192 bone stock. and I doubt if something was FUBARd enough to make me drop to 158 hp that I would still be running 14sec 1/4 mile.
Lesson being, dont put a lot of faith into those things.
Bone stock dyno: 192 RWHP 258 RWTQ
I add a CAI, Cobra Intake, 70mm TB, better plugs, bassani o/r X, MAC shorties, 3.55 gears.
I run the G-tech meter, register a 14.01, not too bad, I look at HP, its telling me I have 158 rwhp, something is way off there, seeing as how I dynod 192 bone stock. and I doubt if something was FUBARd enough to make me drop to 158 hp that I would still be running 14sec 1/4 mile.
Lesson being, dont put a lot of faith into those things.
94-302-vert
Active Member
Those things are only as good as the weight you set into them... They can be pretty accurate... I did some HP runs on my last truck and it was telling me 215-222 and I dyno'd 220 in the same trim...
I played with the high dollar model belonging to a friend one Sat for a couple of hours.
The first time out it showed something like 178hp
I read a lot of more stuff in that thick manual and saw I where I screwed up with a few things the first time
Second blast showed something like 224hp or whatever but ... it was still real low
I read for about 15 more minutes and found several things I needed to change to give more accurate results but ran out of time.
Later that night, I looked at the two runs and even though the hp/tq numbers were low, the curves were an exact match for my dyno curves. They were too low of course, but I did think if I had more time to play with it, I could get results much closer and my gut feeling was they might get real close.
anyway ...................
The GTech is a testing device and IMHO, should be thought of no differently than the dyno.
You first set a baseline
and
then compare to see gains
or losses 
to changes made seeking the hp/tq addiction fix
100% Accuracy is not really all that important
Grady
The first time out it showed something like 178hp
I read a lot of more stuff in that thick manual and saw I where I screwed up with a few things the first time
Second blast showed something like 224hp or whatever but ... it was still real low
I read for about 15 more minutes and found several things I needed to change to give more accurate results but ran out of time.
Later that night, I looked at the two runs and even though the hp/tq numbers were low, the curves were an exact match for my dyno curves. They were too low of course, but I did think if I had more time to play with it, I could get results much closer and my gut feeling was they might get real close.
anyway ...................
The GTech is a testing device and IMHO, should be thought of no differently than the dyno.
You first set a baseline
and
then compare to see gains
or losses to changes made seeking the hp/tq addiction fix
100% Accuracy is not really all that important
Grady
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