possible to get down into the 12's or at least 13's with 4.10 gears and a 5 spd? - Diesel Forum

psu927 · 09-30-2006, 07:35 PM

That is my target area but if I can't get that kind of speed, then I want to trade off on an auto. Just wondering if you guys think I can get into that range.

fromoo · 09-30-2006, 08:11 PM

I hope you can shift very fast LOL i think you would need a built auto and alot of fuel and maybe some nos

ltfox · 09-30-2006, 08:34 PM

I heard on here once that you'll lose about a second every shift. That may be a bit much.... but 5 shifts = 4-5 secs.......

TERRCO · 09-30-2006, 09:09 PM

The latest video of David Lott shows what looks like a 6 speed in the other lane being shifted rather quickly.I could be wrong.(I know you said five speed)

psu927 · 09-30-2006, 10:03 PM

ok, I'm just looking to get that kind of acceleration I'm sure being in the 14's or 15s would throw me in my seat, I never had that kind of power yet though

ShawnMyk · 09-30-2006, 10:32 PM

I dont know why you couldnt. Getting a short throw shifter would be the first thing. People have been shifting manual tranys faster than automatics can shift for years on the strip. If you really wanted to get serius you can get a 5 speed built to shift quickly, it just takes some tricks that work with all manual transmissions because they are all basicly the same.

75f100 · 09-30-2006, 10:57 PM

Its not the shifting thats the problem. Its the fact of lauching it.

Been there done that, trust me.

Pitracer110 · 10-01-2006, 08:56 AM

[ QUOTE ]
That is my target area but if I can't get that kind of speed, then I want to trade off on an auto. Just wondering if you guys think I can get into that range.

[/ QUOTE ]

Just wondering what your et is now if you have one.

Nick

caryt · 10-01-2006, 10:15 AM

Not impossible but totally impractical. You would have to spend way more $$$$$ on the engine to make way more power to get there compaired to a less powerfull motor with a auto. My stock 95 injectored truck was 2seconds quicker to 60mph than my brother in laws 00 SD...really pised him off [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

Cary

Sparkydm · 10-01-2006, 12:48 PM

I've already got my flame suit on but don't see any use
for a manual transmission other than preference. All
transmissions break and clutches go. The auto is much
more flexible for me and isn't operator sensitive. It
allows me much more choice in getting fishing partners! [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

psu927 · 10-01-2006, 09:28 PM

ok. Well I just basically want that "throw you in your seat" acceleration. I'm not going to drag with it or anything.

Pat_T · 10-02-2006, 03:13 AM

Well there is a big difference between drag racing and seat of the pants feel. There is also a big difference in your wallet. My buddy got his 6 speed dodge down into the high 14's, but it was at the cost of his transmission, his truck burned 514/1500 on the dyno that same day. Two other guys lost their autos that weekend, too much boost at launch welded internals. Point? Nothing really, just made me not want to race my daily driver, and had to tow two rings home that weekend. Anyways...

Start with an intake, you already have the DP, get a 4" exhaust, upgrade to a smfw and at least a LUK clutch but a South Bend would be better. A really good chip and edge ez will help a lot, make sure and get some guages. That will be a good start, plus improve your fuel milage, and your seat of the pants feel will be a big difference. My biggest improvement so far was my injectors and HPOP, next will be a turbo, then a chip... I won't be running a cac, I'm rebelious.

You will also want to control wheel hop, two ways to do that are ladder/traction bars or remove your blocks and replace with taller springs. Or go with an all out 4 link... but you may not want to go that far. One way to off set the 4:10 gears is taller tires, I don't know what size would equal 3:73's though, downside you will lose some bottom end, but gain on the top end.

milner351 · 10-02-2006, 11:51 AM

There is an organization of stick shift drag racers, do a google search. A guy comes out to Milan dragway on our club nights with a 65 mustang coupe, stroked Windsor, and a Liberty 5 speed manual ($$$)
He uses a cintered iron clutch disc.
Launching with this set up is not a problem, the car launches like non I've ever seen, harder than a car with an automatic and a trans brake. The car LEAPS off the line and carries the front wheels no less than 2 FEET off the ground until he pulls second gear at about 40 feet, then the front end stays on the ground for the rest of the run, he uses all 5 gears in the 1320 and routinely blasts of 9 second passes.

This is a totally unrelated powertrain and vehicle, but, the point is, it can be done, all the fast cars in the good old days were stick shifts, cause autos couldn't handle the power.

At this point, you really have to ask yourself what you want to do with your truck. Trucks were never indended to be race cars!

Pat_T · 10-02-2006, 04:09 PM

[ QUOTE ]
Trucks were never indended to be race cars!

[/ QUOTE ]

That right there says a whole lot. I think it comes to a point where you need to end up buying a second rig. Then decide what you plan to do with the truck. My buddy wasted his 6 speed drag racing but his truck is really set up better for pulling. My other friend who helped him change the tranny out said enough is enough and bought a second truck just for racing.

1fstfrd · 10-02-2006, 04:36 PM

It's not so much the launch of the auto but that you can't sit at the line and build boost so you can't get off the line that fast because your turbo has to spool up before you can get going. Then trying to shift a ZF5 fast is a whole nother story. It's not like you are shifting a Mustang or Viper or some other sports car with a tranny that you can shift quickly easily. You will need to have a LOT more power to get a 5 speed down the track that fast than you will with an auto.

"My buddy got his 6 speed dodge down into the high 14's, but it was at the cost of his transmission, his truck burned 514/1500 on the dyno that same day."

Those TQ numbers sound WAY off for the hp number. Where did he dyno that at? Did they have a tach hooked up? If not then the TQ reading isn't right.