Burn Out
09-16-2004 | 10:29 PM
#31
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From: Mefis
Originally Posted by zippy
the system doesn't work that way. the brake proportioning system is done by how level the vehicle is. the pcm has it's own way of taking power away.
i believe the tahoe is a 5 link (2 lowers, 2 uppers, and one panhard bar). this helps in gaining traction and is far superior to a leaf spring setup, but mostly the tahoe having some weight over the rears does the job. even the old body style with leafs wouldn't do a burnout in most cases.
i believe the tahoe is a 5 link (2 lowers, 2 uppers, and one panhard bar). this helps in gaining traction and is far superior to a leaf spring setup, but mostly the tahoe having some weight over the rears does the job. even the old body style with leafs wouldn't do a burnout in most cases.
09-16-2004 | 10:49 PM
#32
Originally Posted by zippy
...i think the 8.5 should handle 12's without much problem from the axle tubes, but if it does i'll put a 9.5 in it from a 6600gvw truck.
Further... There's no way a Vortec 350 with factory EFI will get a Tahoe into 12's. It is not possible. Mid 13's is even asking a lot.
09-17-2004 | 08:42 AM
#33
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From: Las Vegas, NV
we're soon to find out on the injection part. looking into changing the intake system over to a ramjet over the winter and make it work with the factory computer in order to get rid of the fmu. at this point i haven't ordered the poppet valve elimination kit for it yet, but quite possibly will be doing that if needed before the end of good weather season. i see no reason the 8.5 won't hold up under that kind of abuse aside from the weight of the vehicle. it's not much heavier than an impala SS and they go solidly in the 11's on the stock parts let alone with better parts. i've also seen a few of the previous gen truck's running in the 10's on the stock 10 bolt. i'll make sure to keep reporting in though on the progress. we should be running it next weekend at the M9 event at Mid Michigan Motorplex next weekend.
09-17-2004 | 08:51 AM
#34
Originally Posted by zippy
...i see no reason the 8.5 won't hold up under that kind of abuse aside from the weight of the vehicle...
09-17-2004 | 09:49 AM
#35
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From: Las Vegas, NV
Originally Posted by James B.
Well, do what you like. When the cover bolts start walking themselves out, realize that is a sign of housing flex.
kinda hijacking the thread, but it seems to have concluded anyway. here's a picture of another vehicle we did for the same guy.
09-17-2004 | 11:42 AM
#36
Originally Posted by James B.
I know what you mean. It's the weight. The converter stalls at too low of an RPM to let the engine make enough torque to overcome the traction and the brakes. The full-size SUV's are heavy in the back. Be careful with that 10-bolt, under the weight of an SUV they do not stand up to abuse. Of course you could always get it painted. Green Tahoes can smoke the tires any time you like.
09-18-2004 | 01:45 AM
#37
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From: Las Vegas, NV
made a few pre-supercharger runs tonight in the tahoe. with the stock pcm back in it, edelbrock headers, duals with flowmasters, and aem intake kit (something like that, i know it's shitty). only ran a best of 15.558@87.** (timeslip is in the truck right now). the stock pcm over the ed wright pcm is a huge difference, wish i could have tested it. next time the truck should be blown...
btw, also weighed it...4922 with me in it.
btw, also weighed it...4922 with me in it.
09-26-2004 | 03:57 AM
#38
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From: Las Vegas, NV
ran the tahoe today at the M9 event. best pass was 13.84@100.21 if i recall. going to post the slip if i can tomorrow along with the dyno sheets. got more tuning work to do, but not bad with only 80 miles or so on the blower by that point. other than the driveshaft hitting the floor on the launch, everything ran great. ran it to over 130 on the way to the track. more to come.
09-26-2004 | 09:47 AM
#39
Originally Posted by zippy
ran the tahoe today at the M9 event. best pass was 13.84@100.21 if i recall. going to post the slip if i can tomorrow along with the dyno sheets. got more tuning work to do, but not bad with only 80 miles or so on the blower by that point. other than the driveshaft hitting the floor on the launch, everything ran great. ran it to over 130 on the way to the track. more to come.
09-26-2004 | 03:35 PM
#40
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From: Las Vegas, NV
ok, only got 3 runs due to time restriction and the track getting slicked down a few times. also dyno'd it at the track. best pass of the day:
60': 1.968
330': 5.704
1/8: 8.816@78.70
1000': 11.537
1/4: 13.834@100.20
peak hp on chassis dyno: 334.1@5100
peak tq on chassis dyno: just over 390, but the dumass didn't print it. (would have been more, but they couldn't run it low enough without it shifting).
af ratio: 11.8@4000 13.7@5000
this was all on the pulley that came with it. i believe it's a 3.4. would hit 11 psi at 5500, but was peaking hp at 5100 at between 9 and 10.
60': 1.968
330': 5.704
1/8: 8.816@78.70
1000': 11.537
1/4: 13.834@100.20
peak hp on chassis dyno: 334.1@5100
peak tq on chassis dyno: just over 390, but the dumass didn't print it. (would have been more, but they couldn't run it low enough without it shifting).
af ratio: 11.8@4000 13.7@5000
this was all on the pulley that came with it. i believe it's a 3.4. would hit 11 psi at 5500, but was peaking hp at 5100 at between 9 and 10.
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