how much slower will a manual be than an auto in the 1/4. given that i can shift and launch good.

Substantially slower. It is usually really tough to get a manual truck into the 13's. The shift points come faster than you can shift manually. Also, you lose boost when you clutch, which also slows you down quite a bit.

Alot of people who race them, have aftermarket clutches that allow them to slip it, when they launch in a higher gear. I believe a lot of them launch in 3rd.

got a 6 speed .stock it ran 17.20 (and I can shift) by buddy has an auto same year(o4') it ran 16.35 stock. I put a programmer and exhaust my best 15.65. he put a programmer and exhaust ran 14.40 enough said. no stacking either on programmer no edge or bully dog

I have the juice with ***. and a 6 spd. ext. cab short bed. I ran a reg. cab 05 with an alli. and the same chip and he ran a 14.9 and my best was a 14.57. I have a stock clutch second flywheel and took off in 2nd gear 4wd and shifted out of 4wd when I was in 5th gear doing about 80mph top speed was 93-94 mph I think. I can shift mine quick enough so that the boost doesn't drop below about 10-12 psi. between shifts and yes I was using the clutch and no power shifting for me thanks. If I had a program that ran harder on the last 3 gears I would think mid to low 13s would be pretty easy, but no clutch.
P.S. this is hard on the clutch and I tried 3rd gear take offs that day as well they didn't seem to work for me that well with a 15.07 being my best in 3rd gear take offs.

so if you can shift fast enough and keep the boost up it really won't be that much slower? what are extended cab short box auto trucks with just an edge running? i need to drive one and see if i like it. i've driven cummins with 5 speeds and i can shift those as fast as my hand will move.

If you want a 12 sec. or faster truck you will need an auto IMO. 14's shouldn't be a problem though.

First off the loss of boost thing between shifts is way overrated, if you shift fast you don't loose that much and it recovers quick. Everyone that sat in my truck that has a Duramax/Allison has commented on not feeling any power loss between shifts.
I have been thinking about this way before I ever bought my truck. I have done some testing with my G-tech Pro Competition (the $300 unit, I've used it at the track and its 60' are dead on and the 1/4 ET is within .1 - .05 sec.) It shows shift points, rwhp and rwtorque graphs it all out on the PC and tons of other great stuff.
Any way using the graph portion on my G-Tech, the 2nd to 3rd shift takes me .2 sec, 3rd-4th about .3 sec, 4th-5th shift takes .2 and 5th-6th shifts takes .4-.5 sec. So 2nd-5th gears are all considered very fast shifts and boost hardly drops and there is no power loss felt in between those gears. Going into 6 gear there is a very slight drop in power which happens around 80 mph.
I have a buddy with a 05 Cummins with just 1 programmer, a 6 speed and 4wd , he launches in 3rd at redline turns a 1.8 60' and runs a 13.7 sec 1/4 in the high 90s all at 7000lbs.
My truck currently runs a 15.2 @ 93 mph at 70F with a dead slow 2.4 60' What would it run if I had slicks and got it to hook ... 14s I'm sure with just a weak hypertech.
I believe that if you take a 6 speed truck and put in 3:21 gears , 32inch tires and a good clutch it might beat the auto with the same mods until you get really fast , say low 12s -11s or faster. The reason is with the higher gear ratio it would space the gears allot more, you would only making 3 fast shifts instead of 4 with one really slow shift.

You need appx 150-200 RWHP more in a manual TurboDiesel to run the equivalent times of an automatic TD truck from what I have seen in the CTD world. As well, you need to be willing to abuse the clutch at the line a bit

I have an 02 with the juice/*** and ran a 14.57 taking off in 2nd 4x4 and ran against an 05 lly auto with the same tuner but with aftermarket exhaust and his best time was a 14.79. I will agree though you have to be agressive to say the least to keep with the autos but its definatly possible until you get into the 12s I would say. On a side note it seems to me that all the CTDs I know of that are sticks are very slow shifting(more the trans than the driver I think)?

cp mac has the best dmax zf 1/4 mile iirc 13.2 sn i have herd of dodges running 11s with a hand shaker

whos that. dodge in the 11s shakin hands, i wanna see.

just herd of it on tdr

A deccent set up auto will eat a sticks lunch off the line. And the first 60' is the most important part of the race IMO. You will need some power to play catch up. Once rolling the stick isnt a ton slower. JMO But if you want to row your own gears then go for it:cool:

The absolute best is when you beat a Ford or Dodge with an auto and you tell them you have a handshaker!!!:muahaha:
Anyone running a short throw shifter kit...wondering how many tenths can be had with one?? Thinking about putting one in when the new clutch goes in, but not sure if the cost is justified!

who sells short throw shifters for the zf6?

Dewalt?

You can get the short throw from BD out of JEGS.
Got Juice, I don't think the manuals need 150-200 more rwhp to keep up with the auto? That would mean I would need an edge or Quad just to stay with a stock auto?? NO WAY!
I agree you need to abuse the stick truck allot more but thats like any other vehicle running a manual tranny. Its just like the LS1 camaros running at the track. Its easier to get them to hook with the the auto and get a good 60' but if you can get the manual to turn the same 60' , it will beat the auto.
The bottom line is there is not enough people out their with 6-speeds that seriously race them. Look how long its taking to get a got flywheel/clutch setup?
Not sure about the CTD running 11s shakin but you can shift them fast as well.

Got Juice, I don't think the manuals need 150-200 more rwhp to keep up with the auto? That would mean I would need an edge or Quad just to stay with a stock auto?? NO WAY!
I agree you need to abuse the stick truck allot more but thats like any other vehicle running a manual tranny. Its just like the LS1 camaros running at the track. Its easier to get them to hook with the the auto and get a good 60' but if you can get the manual to turn the same 60' , it will beat the auto.
The bottom line is there is not enough people out their with 6-speeds that seriously race them. Look how long its taking to get a got flywheel/clutch setup?
Not sure about the CTD running 11s shakin but you can shift them fast as well.

Just what I have observed in the CTD's running at the track.

Also gota remember with 60' that its alot easier to build boost and get a clean launch in a turboed vehicle with an auto than a manual.

Yup... seen plenty of 450 RWHP Automatic Dodges slaughter a 600 RWHP manual transmission Dodge.
Slaughter by 1 second....in the 1/4 that is a lot!

You just cant outrun an automatic with a stick in these big trucks, power for power. The 5/6spd's werent meant to be shifted fast like one in a car. My buddy has a 95 dodge the same as mine with a 5spd, but he has injectors(370's), and a bigger stock pump on top of what i have. He can run with me pretty good, but i still believe i would get him through the 1/4 mile by just a hair. If i had 370's like he does, i could clean his plow, and never look back. There is probably going to be about a 1 second difference through the 1/4 between a manual, and auto with the same power. I raced a blue 6spd D-Max out on the street at scheid a couple years ago. He had 2 boxes stacked, intake, and 5 inch exhaust. I murdered him from 0 till about 45mph where he finally caught me, and was getting ready to pass me. This was back when i ONLY had the fuel plate, and lockup switch ith the 3 inch straight, and K&N drop in. He was JAMMING gears to. The only way you can be competetive with a 5/6spd is to come out of the hole in 3rd gear 4x4 running it hard with a dual disc clutch. I have seen one dodge run 8's through the 1/8th doing that, and he was booking. When he came off the line, the whole front end pulled sideways from the torque of the motor. Usually with a 5/6spd hanging with an auto with the same power up in the higher gears isnt a problem, but there is to much shifting to do taking off to do much good. I know a boy with a d-max with a stock clutch/6spd. He is getting a bully dog box for it(i think that is what he said)soon, and wants to race me when he gets it. Im sure he will probably get me from a roll, but from a dead stop, i have a feeling he will be dissapointed. Anyway. Auto's are just faster power for power, and that is just how it is.

BTW: Jeff Prince's dodge was running REALLY low 12's with a 5spd :eek: :grd: for you nay sayers.I feel he could have gotten 11's with just a little more, but he switched it to an auto, and is running REALLY low 11's now. So he gained about 1 second. I have the vid downloaded on my computer, but i tried opening the link i got it from on the internet, and its not working? If someone wants to see it that bad PM me.

Eric

I agree its because of the weight of these trucks the auto gets another advantage. A truck weighing over 7000 is going to be hard to get off the line quickly with a stick, but my buddy still does it all the time with his CMT and pulls 1.8 sixty's.
I think the a 1 sec diff might be a little extreem if your E.T is in the 14- upper 12s. I would love to see the same truck as mine but with an auto running a second quicker at 14.2..

With 2000 rpm at launch its not hard at all to get 7000lbs. moving, its actually hard to control the thrust and pull and still make the next shift. At this rpm you'll have the tires spin in 4wd when you dump the clutch and then its pulling like a mother. We all know how few dmaxs there are with sticks so how do all of you guys with the allis. know that comparably powered trucks with a stick are 1 sec slower if even slower at all. I did a little test today on the street and my boost dosen't fall below 16psi. until I hit 6th and then it goes down to about 12psi. I know an auto is easier to drive, pull, and race but I like something that takes some actual driving skill.:stirthepo :joke: Seriously though until you get into the 12s I don't see there being that much of a difference maybe 1-2tenths at most if you know how to drive a stick aggresively:D