A smoking question

[vegas39]

Please bear with me here so I can explain this.

On my C6 truck, I can take off easy from a start and no smoke all the way through the auto shifting range and because the rpms stay up, no smoke, if I'm driving easy.

If I take off in second with the new 5 speed truck, 1st gear is too low, the truck pours a decent amount of smoke due to the few seconds of lugging and also smokes between shifting gears, because the rpms drop.

Will a smoke puff limiter take care of this? I dont understand why the smoke on take off if I'm not even touching the accelerator. I cant see how a smoke puff limiter could take care of the smoke at take off because like I said a second ago, no acceleration. Doesnt the injection pump keep the fuel cut down low when your not touching the pedal?

Confused here because on hard acceleration, the truck doesnt smoke. If I set in neutral and gun the throttle hard, barely any smoke. On the freeway, I can plant my foot in it and no smoke. Take off from a dead start and shifting gears, plenty of smoke!

 

[riotwarrior]

You are talking about two trucks here...one appears to be turbo, one not.

Smoke puff eliminator will work on Turbo, not NA as far as I know...

Whats the direct ? and to which truck?

Al

 

[hesutton]

It's not really possible to eliminate smoke in all situations with a mechanical diesel. Certainly lugging the IDI will make it smoke as there will be zero boost and lugging it isn't the best thing for the bearings either. It'd be better to let it sign a bit higher in the RPM range in 1st than to lug it in 2nd. No smoke under hard acceleration is what you wanna see. That's the turbo doing it's job.

A smoke puff limiter (aeronoid) would help, but as I said earlier, I don't think it can eliminate smoke in all situations. But, it should make a noticable difference.


Heath

 

[Devon Harley]

A stock non turned up pump turbo or not lugging from a stop using second is always gonna puff some smoke. 1st gear in a zf5 is not a granny gear it's first so i would be using first. With 4:10 gears 1st tachs out at around 20mph shift at 10-15. This trans being a stick doesn't run it around like a Honda.

 

[79jasper]

Yeah I'm not seeing a real problem.
With 3.55 gears in the 88 f250 7.3 n/a, I could skip 1st in a rolling stop. But startup in 2nd would usually end in smoking the tires.
With my 94 f350 psd, I definitely can't skip 1st, even with 4.10's.

 

['94IDITurbo7.3]

if it is the '89 in his sig, then it has an h-max turbo.

 

[vegas39]

Sorry guys, been busy all day. Yes it's the 89 in my sig with the hypermax turbo. I honestly thought that first was a granny gear in this truck! I dont know how many here have driven a 5 speed, I'm sure quite a few but 1st gear is way too low to start off in. Seems like when I use first, I no sooner accelerate and two seconds later, the engines screaming for second and I'm getting run over at stop lights by impatient aholes.

As far as the smoke goes, I'll have to invest in a puff limiter for this thing. As far as the truck goes, I'm just not falling in love with it like I thought I would, so anyone who hands me 3900 bucks, can have it. There is a pic of it on Facebook.

 

[redneckaggie]

are you using throttle when taking off? I really doubt a smoke puff limiter will solve your issues because essentially all the smoke puff limiter will do is limit fuel until boost comes on, unless you are mashing the peddle when taking off in second gear I dont think the limiter will be able to limit fuel below min level of the ip.

 

[TWeatherford]

I have a 4.10 rear in mine, and I start in 1st almost all the time. The only time I don't is if I'm pointed downhill, but usually do anyway because of habit. I feel that second is way too high to start in, too much throttle and slow clutch letting out, more wear on the clutch too. I didn't get this truck for fast acceleration, and don't mind the extra clutch push.

Of course I've got a CC, so a slightly heavier truck, but 1st it is for me. You're not running some sort of tiny tires are you? Mine are 31.5" tall.

 

[vegas39]

I use a dead throttle start, whether in first or second gear. As far as the tires go, they are 245-75-16.

 

[Hydro-idi]

Sounds normal to me.

 

[79jasper]

Just idle out in 1st just enough to get rolling, then quickly hit second.
If the constant shifting bothers you, get a auto. Or do a gear/tire change.

 

[Devon Harley]

Then if it's to low use it let clutch out don't touch throttle an then depress right away hit 2nd an then use throttle. My pumps turned up an I live in ca so the lugging 2nd gear take offs because it's to low an not fast enough = Fat ticket an pissed off Prius owners. It was that way stock but not quite as bad so I turned up an use first an the clutch seems to like 1st better.