modded truck vs. stock tahoe
08-22-2004 | 09:43 PM
#11
12 Second Truck Club
Joined: Feb 2002
Posts: 5,575
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From: Sacramento, CA
I would invest in a G-Timer or the new G-Tech if I was you guys. They can help you with a lot of litle things when it comes to testing out mods. A stop watch is a horrible device for measuring performance IMO.
But yeah, there is something wrong with your truck.
I wen tthrough similar stuff while modding my truck. I would put all these little parts on and tear off weight and it was still slow. Hell at one point I had every bolt-on except cam and pulley and was stillrunning low 15s.
Took the cam and good tuning and BAM! low 14s 
But yeah, there is something wrong with your truck.
I wen tthrough similar stuff while modding my truck. I would put all these little parts on and tear off weight and it was still slow. Hell at one point I had every bolt-on except cam and pulley and was stillrunning low 15s.
Took the cam and good tuning and BAM! low 14s
08-22-2004 | 09:46 PM
#12
Originally Posted by derek_silvy
Help - how much?
I'ld LOVE to believe that the truck got beat by a stock tahoe b/c it is thrown so out of tune by the cam and stuff. I'ld to to think that, but then again. I ran a 9.47 0-60 and I was thinking I could be around 7-7.5 (thats with wishful thinking). I mean... my old truck with less mods and 250,000 miles friging outruns my new one to 60. So I almost wanna say forget it and sell it.
I'ld LOVE to believe that the truck got beat by a stock tahoe b/c it is thrown so out of tune by the cam and stuff. I'ld to to think that, but then again. I ran a 9.47 0-60 and I was thinking I could be around 7-7.5 (thats with wishful thinking). I mean... my old truck with less mods and 250,000 miles friging outruns my new one to 60. So I almost wanna say forget it and sell it.
08-22-2004 | 09:46 PM
#13
12 Second Truck Club
Joined: Feb 2002
Posts: 5,575
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From: Sacramento, CA
Ohh, one other thought. You only did a 0-60mph run and you are running an LSX based motor (terrible low end), a high reving cam, and stock TQ converter. Of course your 0-60 times are gonna suck! I bet if you would test each of those vehicles in the 1/8th mile then the 1/4mile you'd be suprised to see how much faster your GM is.
Like I said, you should buy a performance meter and test all the cars. I bet it'll be the best $150 you ever spent LOL Besides, it will teach you ho to launch better and what shift points are better etc.
Like I said, you should buy a performance meter and test all the cars. I bet it'll be the best $150 you ever spent LOL Besides, it will teach you ho to launch better and what shift points are better etc.
08-22-2004 | 09:50 PM
#14
Thread Starter
TECH Enthusiast
Joined: Jul 2004
Posts: 521
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So, whats wrong with it?
And yes, something must be wrong.
When I did the rocker arms, I torqued them to the proper rating. If I torqued them 2-3 ft lbs too much would it cause this friging slowness. And it that was wrong wouldn't it just run VERY badly?
edit:
halo, truck is still on stock tuning.
It does shift at 5200RPM (is that what it should do stock?) which I'm sure cuts off the cam soon. But still... a stock tahoe!
And yes, something must be wrong.
When I did the rocker arms, I torqued them to the proper rating. If I torqued them 2-3 ft lbs too much would it cause this friging slowness. And it that was wrong wouldn't it just run VERY badly?
edit:
halo, truck is still on stock tuning.
It does shift at 5200RPM (is that what it should do stock?) which I'm sure cuts off the cam soon. But still... a stock tahoe!
08-22-2004 | 09:51 PM
#15
Originally Posted by F8L Z71
Ohh, one other thought. You only did a 0-60mph run and you are running an LSX based motor (terrible low end), a high reving cam, and stock TQ converter. Of course your 0-60 times are gonna suck! I bet if you would test each of those vehicles in the 1/8th mile then the 1/4mile you'd be suprised to see how much faster your GM is.
Like I said, you should buy a performance meter and test all the cars. I bet it'll be the best $150 you ever spent LOL Besides, it will teach you ho to launch better and what shift points are better etc.
Like I said, you should buy a performance meter and test all the cars. I bet it'll be the best $150 you ever spent LOL Besides, it will teach you ho to launch better and what shift points are better etc.
08-22-2004 | 09:57 PM
#16
TECH Addict
Joined: Oct 2003
Posts: 2,618
Likes: 0
From: Central, MA
That's strange... There should be a lot more in your setup.
How were you timing the runs? With a g-tech or a simple stopwatch method?
I hear that at least one of the LS6 cams are rather flat on the lowend and midrange... I'm not sure how your version is, but that could definitely be something to consider. They might be more top end or 1/4 mile cams.
Tuning would probably make a big difference with the mods you've done there. I'm willing to bet that you're running well positive on the LTFT's and you're getting extra fuel at WOT. I'm not sure how well the computer is at metering fueling when it starts pulling those tricks, but I noticed a nice improvement the first time I did part throttle tuning which cleaned up my WOT. You can also really take advantage of that cam and raise your shift points and rev limiters.
If not that, the next thing I might look into is the K&N system. I ran a UPD intake for a while, and did a whole lot of mods to a stock airbox. My favorite after it was all said and done, was the stock airbox with a drop in filter. It picked up and pulled right off idle, while the others felt softer down low, or only showed life at WOT and higher RPM's.
Another possibility is KR. Do you have anything vibrating or banging around under the hood or under the truck? (tranny lines, or anything like that?)
How were you timing the runs? With a g-tech or a simple stopwatch method?
I hear that at least one of the LS6 cams are rather flat on the lowend and midrange... I'm not sure how your version is, but that could definitely be something to consider. They might be more top end or 1/4 mile cams.
Tuning would probably make a big difference with the mods you've done there. I'm willing to bet that you're running well positive on the LTFT's and you're getting extra fuel at WOT. I'm not sure how well the computer is at metering fueling when it starts pulling those tricks, but I noticed a nice improvement the first time I did part throttle tuning which cleaned up my WOT. You can also really take advantage of that cam and raise your shift points and rev limiters.
If not that, the next thing I might look into is the K&N system. I ran a UPD intake for a while, and did a whole lot of mods to a stock airbox. My favorite after it was all said and done, was the stock airbox with a drop in filter. It picked up and pulled right off idle, while the others felt softer down low, or only showed life at WOT and higher RPM's.
Another possibility is KR. Do you have anything vibrating or banging around under the hood or under the truck? (tranny lines, or anything like that?)
08-22-2004 | 09:57 PM
#17
12 Second Truck Club
Joined: Feb 2002
Posts: 5,575
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From: Sacramento, CA
Originally Posted by Dark Halo
where can you get one at?
http://www.escortstore.com/gtimer.htm
This is the same company that is famous for the Escort 8500 radar detector. I have one of those 2 and it works sweet