Duramax and 8.1 1/4 mile ET's

KyleBst264 · April 14, 2004

Has anyone on here run there Duramax or 8.1 stock? I'm just wondering what the stock times are, and I mean bone stock, K&N air filter is OK though.

Specify, 2500hd, 3500/Ext.Cab, regular cab or crew cab/longbed or short bed/base, ls or lt/ and the time.

If it ever stops raining up here, I'll bring mine to the track and run it.

Chev8.1 · April 14, 2004

I all most to embrass to say mine is a 2001 2500HD 8.1/allison reg cab.

I went 16.524 at 82.01mph with the torque nannie and big mud tires. It should be at 15.9 or 15.7. But I am waiting for westers to get here to free my big block from trapping of torque management. And finially show me what the big block hoopala is all about. a 5.3 1/2ton ran a 16.6 that to day but He had 500lbs fo sand in the bed to cut a good light. Well hopefully I will do better this year.

linda · April 14, 2004

15.7.....with the stock PCM

15.4....with the westers

Those were average times out of 3 runs each. My best time was 15.3XX with the westers and 15.6XX with the stock PCM. Westers definately made a difference. Also, im not sure how much plays into it, but i had a cap on my truck too. I will say those were not "official" track times. Those were done with a few people timing their trucks on a 1/2 mile straight. I can say those numbers are very close....if anything, they are reported a little slower than what i probably would have ran with a digital start/stop cause we just did the "arm drop" to start. We did not do 0-60 or 60' times though sorry.

422 SS · April 14, 2004

A Dmax is slightly quicker than a 8.1 stock.If you buy a 500 dollar programmer you'll smoke the gas trucks easily.I have owned one of each powerplants and if lining up for money I'll take my Dmax everytime.Don't let anyone tell you a 8.1 is a hotrod because they're not.A strong tow vehicle yes but not what I call a fast truck.Another thing stopwatch and G-tech timing devices are notoriously unreliable.They can be fast or slow but one thing is certain there not accurate.The only times I count are put up at a real race track.I have seen maybe 30 different SilveradoHD run at the track and have yet to see one get into the 15's.Most run between 16.40-17.50 in the 85 mph range.

linda · April 14, 2004

Bla Bla diesel...bla bla gas....bla bla 8.1 slow....bla bla diesel better.....bla bla bla bla.....bla bla. Yesterday i saw a 6 year old girl on a tricycle beat an 8.1L in the quarter mile, i mean she did have a Westers PCM (three wheel hot tune) in the tricycle and a volant air intake with an 85mm throttle body, also they were holding her barbie doll hostage at the finish line but still....you would think the truck would have had the advantage with it having an engine and all. Man if my truck is runnin anywhere close to 17's, i will go out today and buy a ford focus. Our times are NOT 2 seconds off! i will gaurantee that. Who ever said the 8.1L is a hotrod? Its not a hotrod, its a bad a$$ motor for doing just about what ever you need to do, just like the DMAX. Tow/haul, load, or just cruise, and it IS a quick truck for a 7000lb vehicle, if someone tells you its not....its because they drive a Viper as their daily driver. I thinks its safe to say at this point that there are some DMAXes that will out run an 8.1L and there are some 8.1Ls that will out run a DMAX.....its not the standard either way, there are no definates when they roll up to the line, cause i have been on that line and won several times. I did run neck and neck however the other day with the new LLY DMAX, that is definately quicker than the old DMAXes. Had we had further to go, he would have pulled ahead without a doubt, but we only had about a 1000' run. Where i am we dont have a track near by to do official runs, but we have a good group of guys who are fairly knowledgable in what they do, and have been doing it for some time. So i agree that the times may be off a little (i stated that in my previous post, they were not official times) but i can assure you they are not 1 or 2 seconds off. We need to put aside our anti-diesel/anti-gasser hard feelings.

linda · April 14, 2004

I just read my post, and it comes off a little $hitty so i appologize, i didnt mean for it to sound that way.....we will just have to agree to disagree on the 8.1L/DMAX issue. The topic has been beaten to the ground anyhow. Both are sweet trucks and i would be happy with either one, i just fell in love with the one i have.

Machine · April 14, 2004

Hi linda -

Remember that "chip on the shoulder" I spoke of yesterday? Maybe i wasn't too fast to pull the trigger. You sure don't like to see diesels being compared to gas...

linda · April 14, 2004

Hi Linda -

Remember that "chip on the shoulder" I spoke of yesterday? Maybe i wasn't too fast to pull the trigger. You sure don't like to see diesels compared to gas... Too funny.

LOL, its funny, cause i thought the same thing after i made that post....which is why i posted again to sort of iron it out a little. Honestly though, thats not the case with me, i just find it aggrevating somewhat because i am really impartial to either truck (even though i have the 8.1L), i think they are both excellent trucks which ever one you choose. It just always seems that a diesel guy jumps in and says how much better the diesel is than the gasser everytime one of these threads comes around. Its just a reaction of sorts for me to say..."nuh uh". . So take no offense to it, im just providing another point of view. I spend 55 hours a week in a 99' 7.3L Ford diesel at work, so i have driven my share of diesels, but i wouldnt presume to compare the DMAX to the Ford. Anyway, never take my posts to seriously....im just havin fun. I am definately not in the 17's in the quarter though!!!

KyleBst264 · April 14, 2004

I do not intend to start a diesel and gasoline pissing contest, I'm just curious to see the times that they run.

linda · April 14, 2004

well, those were my unofficial times.

Chev8.1 · April 14, 2004

Well to add more fuel to the fire then!!!

Dmax- one turbo and high pressure fuel system

8100 vortec - no turbo and no high pressure fuel system

Now give the 8100 a nice sized turbo and the right cam; then say bye-bye juiced dmax. "bye-bye, I will be waiting at the finish line"

Can We say hp3 8100 Twin turbo?

Dmax's get a turbo, then why not the 8.1?

bluenote · April 15, 2004

Well to add more fuel to the fire then!!!

Dmax- one turbo and high pressure fuel system

8100 vortec - no turbo and no high pressure fuel system

Now give the 8100 a nice sized turbo and the right cam; then say bye-bye juiced dmax. "bye-bye, I will be waiting at the finish line"

Can We say hp3 8100 Twin turbo?

Dmax's get a turbo, then why not the 8.1?

Then let's add even more fuel to that fire!

Vortec 8100 - 496 ci of displacement

Duramax - 403 ci of displacement.

Now give the Duramax the right chip/tuner stack, propane and/or NOS and say bye-bye gas-guzzler ... "see you at the fuel pump before you make it to the finish line"

Can we say "how come the modded diesels have to have tranny upgrades? because they put so much power to the ground!"

The big block gets more displacement, why not the diesel?

422 SS · April 16, 2004

No pissing contest here.I have actually owned one of each and I drag race almost weekly.So I have personal knowledge I'm not guessing about things I have never owned.If a Duramax owner foot brakes their truck up to say 15-18 psi and launches in 4 wheel drive the 8.1 truck will be left in the dust.I have done it more times than I can count.If a Dmax is launched at idle I wouldn't be suprised if the gasser won.If you don't build boost at the line the race is over.The key with a turbo charger vehicles is to launch in the boost,not from idle with 0 boost.I wonder how many Dmax got smoked in a race because the truck wasn't driven right.Given equally skilled drivers I see no reason why a Dmax wouldn't win 90% of the time.You guys will flame for this but probably 10 different mags ran these trucks down the track when they first came out and the 8.1 never won.Not even once.

My response to the put a turbo on a 8.1 part of the above post.DO IT, that would be really fricken cool.

As far as cubic inches VS turbo a LS1 Camaro will stomp a Grand National in stock form.I whooped up on 3 GN's last weekend at the track in my Z06.It's not even close really.

BlackSilver · April 16, 2004

I have a bone stock DuraMax. But mine is in a big ugly ol' pick-em-up , not in a sissy-fied dragster , so I don't much care about quarter mile ET's I guess.

Only draggin' I do is drag my 12,500 pound camper up through them thar hills and hollers .