Question: Smoke tunes?

[THEFERMANATOR]

Tuned it for him today, and he ended up being happy. He's rolling on 37's with about 10 inches of lift and still has stock gears. He was pretty excited when it lit the tires up from a stand still and burned em into 3rd gear. So he ended up getting his smoke tune, tire smoke that is. Don't know how long his converter will last though, it shoots right up to 3000-3200 when you stomp on it on the big tune.

 

[Chevy1925]

That's not uncommon with stock gears and 37s. Mine always did that till lock up

 

[DAVe3283]

Mine would do that with 33s :woott: ... yeah, I fried the crap out of my stock converter. Lit the turbo off nicely, but wouldn't put the power to the ground anymore.

 

[THEFERMANATOR]

That's not uncommon with stock gears and 37s. Mine always did that till lock up

Mine would do that with 33s :woott: ... yeah, I fried the crap out of my stock converter. Lit the turbo off nicely, but wouldn't put the power to the ground anymore.

He was warned up front his trans would not be long for this world, but he insisted on having a tire fryer tune. So he got it. Even with a full tank, some crap in the bed, and 3 large adults in the cab, it lit em up. I don't think he was getting lockup until the top of 3rd, and the trans only has 25K miles on it. Everytime I drive an LLY, the more I wish I would have held out for a newer engine for my swap. The VVT's power is so much more linear, and the smoothness is night and day from an LB7.

 

[WolfLMM]

So, he's lighting up 37s with a stock trans all the way to 3rd huh. My 657hp lb7 won't fry the tires to 3rd.

 

[TheBac]

Im still shocked that a thread on smoke tunes either good or bad would be discussed on this site.

 

[02greysixer]

I think it depends a lot on the tire. My buddy has an lly on 40.5s with just a banks 6 gun and he can smoke them through 2nd. But they are aggressive tires and hard as asphalt so the contact patch is tiny. Same with my dad's lbz and 35" bfgs. He can smoke them through 3rd.

 

[c20elephant]

Smoke tunes, I do not think the EPA/State inspections are only looking at that to step up enforcement, what about all the tampering violations posted in signatures on this and half dozen other sites?

 

[THEFERMANATOR]

So, he's lighting up 37s with a stock trans all the way to 3rd huh. My 657hp lb7 won't fry the tires to 3rd.

I think it depends a lot on the tire. My buddy has an lly on 40.5s with just a banks 6 gun and he can smoke them through 2nd. But they are aggressive tires and hard as asphalt so the contact patch is tiny. Same with my dad's lbz and 35" bfgs. He can smoke them through 3rd.

They're pretty aggressive tires on it, so that helps in taking away some contact patch. But I was shocked to. Stood on the brake, gave it 1/4 throttle until it started spooling good, released the brake and stabbed teh throttle, and she was off sideways roasting em.

Im still shocked that a thread on smoke tunes either good or bad would be discussed on this site.

I figured one asking why some found it cool would be OK. Many of us will admit we found it interesting at first, but now see it differently. I just honestly cannot think why I ever found it cool in the 1st place. I'm still tweaking my current tune to try and get as much smoke out of it as possible. I know there isn't much I can do until it is on boost, but once it starts spooling I want it clean. I'm currently hazing on a 90 degree day at mid throttle, but clean at WOT. Bugs the heck out of me. Need to tweak my timing some more. Still have it retarded a bit much at lower throttle settings to make the turbo light off quicker.

 

[c20elephant]

When can I get my tire roasting tune....:thumb:

 

[Chevy1925]

So, he's lighting up 37s with a stock trans all the way to 3rd huh. My 657hp lb7 won't fry the tires to 3rd.

do a boosted launch in 2wd and it sure as hell will burn through 3rd gear if the trans holds.

on my tow tune, a boosted launch in 2wd = tire smoke into what ever gear i let it run to (generally 3rd is as high as i let her go). a non boosted launch = 1st gear spin as soon as the small turbo lights, 2nd gear tire squeal then spin when lock up hits, 3rd can either hook, continue to spin or chirp to traction depending on road surface.

race tune, anything below 45-50mph is spin fest in 2wd.

this is on 37" BFG KM2 mudders.

 

[WolfLMM]

Intentionally trying for a burnout is one thing, but the post sounded like he could just stomp it and fry the tires thru 3rd.

And you are wise to let out of it before 3rd and esp 4th. Your trans will be in pieces on the pavement

 

[Chevy1925]

Intentionally trying for a burnout is one thing, but the post sounded like he could just stomp it and fry the tires thru 3rd.

And you are wise to let out of it before 3rd and esp 4th. Your trans will be in pieces on the pavement

the wise thing to do is not let them spin at all . i know what could happen, my builder was very clear on it.

 

[WolfLMM]

the wise thing to do is not let them spin at all

I dont.

 

[DAVe3283]

So, he's lighting up 37s with a stock trans all the way to 3rd huh. My 657hp lb7 won't fry the tires to 3rd.

If you can't fry the tires in 3rd with 500+ HP, you're not trying hard enough. :joker:

Before the build (525 HP / 980 ft-lb at the wheels) I would not only fry my 315/70R17 BFGoodrich's (12.5" x 35") into third, it would light them up from a roll in 3rd. :woott: Makes me worry about driveability once my new motor is together, as I'll be way past 500 HP.

But yeah, it is best not to fry them if you can help it. The problem is, like many on here, I can't go WOT below 50 MPH or so if I actually want to put power to the pavement.

Everytime I drive an LLY, the more I wish I would have held out for a newer engine for my swap. The VVT's power is so much more linear, and the smoothness is night and day from an LB7.

You still have the stock turbo on your LB7? Both my brother and I have replaced our stock chargers, and it is night and day. You won't get the instant boost of a VVT, but the aftermarket chargers light quicker than stock. Though I still think a (mostly) stock LBZ is the ideal engine.

I imagine it is easier to tune the smoke out of a VVT than a fixed turbo. FYI, I've had pretty good luck getting rid of smoke and hitting boost quickly by turning rail pressure up until it starts to clatter, then crank the timing until you get most of the injection event BTDC. If the mild clatter (think 7.3 powerstroke) bothers you, a bit more pilot injection (or a bit less rail pressure) takes care of it.

 

[WolfLMM]

Yeah but your tires aren't known for stickiness.

 

[WolfLMM]

My LMM with 285BFG Km2 will spin them easily in 1st and 2nd. But not 3rd and it's sitting at 500hp...

 

[Chevy1925]

the wise thing to do is not let them spin at all .

I dont.

My LMM with 285BFG Km2 will spin them easily in 1st and 2nd. But not 3rd and it's sitting at 500hp...

well im glad thats sorted out :roflmao:

 

[DIESELMAFIAPER.LB7]

You mean letting mine grab 5th gear in a burnout isn't good for it

 

[WolfLMM]

well im glad thats sorted out :roflmao:

I don't spin them intentionally. But it has happened.....