lol, I literally beat the holly hell out of mine by comparison to you guys....
How often do you go WOT aka "Italian tune up"?
- Thread starter Sean Michael
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Joseph Garcia
Supporting Member
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I'm with you, @Doubeleive . I believe that this is your saying: "Drive it like you stole it."
PG01
Supporting Member
Lets relax on the italian tune up thing… ya hear wut im sayin’ SEAN….. lmao…
Im with doobie @Doubeleive and mr garcia @Joseph Garcia … drive it like ya stole it… if it breaks… fix it.
Im with doobie @Doubeleive and mr garcia @Joseph Garcia … drive it like ya stole it… if it breaks… fix it.
OP
OP
Sean Michael
Member
Do the stock transmission and rear end need upgraded to handle reasonable WOT use from an unmodified engine making stock power, or is that come more into play once people start tuning and adding power?
I understand that constantly wailing on any vehicle is going to wear things out faster, but I'm with @PG01, I'm going to enjoy it and fix it if it breaks.
Good tips, and I am in Texas with plenty of long on-ramps and open highways where I can give it the beans in a relatively safe and legal manner. There's a county road near me that has a particularly long onramp with an uphill grade that opens onto a 75mph highway that everyone seems to do 80 on anyways, so I'm always stoked when I get to use it with nobody in front of me. Being an uphill grade makes the engine work harder and keeps me from reaching unethical speeds by the time I merge.
What is DFCO?
Tonyrodz
Resident Resident
I practice this with my 03. Got the bills to prove it.
Transmission is the weak spot, that's really all I can tell you. Most of the ones I broke were in the 1-2 shift, that might tell you a bit more
Marky Dissod
Full Access Member
Long story as short as possible:
Deceleration Fuel Cut Off
A bit longer:
Usually (when the TPS% is more than 0.0%) the engine turns the transmission which turns the R&P, which turns the tires, which push on the road.
Whenever the TPS% is 0.0% (for argument's sake, let's oversimplify), the road pushes the tires, which turns the R&P, which turns the trans which turns the engine.
Why use fuel to turn the engine, when the road is already turning the engine? (This assumes the TCC is LOCKED.)
No fueling, no combustion, engine slowly cools off though, so the ecm cannot allow the engine to go under 185F / 85C.
GM's Gen5 V8 can do DFCO one better; cylinders taking a break are not working sucking air past a closed throttle.
DFCO is NOT engine braking - which is technically powertrain braking, because downshifts are integral to the braking effect.
The higher the gear, the more it's DFCO, not powertrain braking.
(Decel Enleanment, when DFCO is NOT in effect even though the vehicle is decelerating, went out of fashion around the same time as Lean Cruise did.)
adventurenali92
Full Access Member
I am the same way…. Get rolling and then WOT to get close to freeway speed by the time I’m merging in….
Mainly because California flatlanders are bat shit crazy drivers when it comes to freeways, and if you’re not using the long onramps like you’re coming out of a pit stop in a nascar race, you’ll never make it onto the freeway…. Lol.
fozzi58
Full Access Member
WTF - Italian Tune up? I got your tune up......RIGHT HERE!
On a serious note...The Direct Injection engines can't really get cleaned out that way (WOT pull) because there is no PORT injection and that's the problem. The back side of the valves will always have carbon buildup because there is no fuel flowing over them. That's why in DI engines, even for longevity you should have an oil catch can.
There is a maintenance procedure from GM to clean the valves. There's a spray foam and a few hours of wait time and it will clean out your engine. A few mechanics say to run through the procedure a few times.
Same. I think the torque converter is the only thing that has kept my trans from un-aliving itself..
The torque converters seem to be a problem point for the 6 and 8 speed transmissions. I believe you have a 10 speed so problems seem to be less common in that trans. I don't have any input on the new IRS on the newer models. I have the solid axle from the K2XX series and the G80 rear-end earned the name "G-bomb" for a reason.
I would think reasonable WOTs aren't an issue with the stock drivetrain. If you start driving it like Tony, Dou, or myself, you are probably in for upgrades in the future.
On a serious note...The Direct Injection engines can't really get cleaned out that way (WOT pull) because there is no PORT injection and that's the problem. The back side of the valves will always have carbon buildup because there is no fuel flowing over them. That's why in DI engines, even for longevity you should have an oil catch can.
There is a maintenance procedure from GM to clean the valves. There's a spray foam and a few hours of wait time and it will clean out your engine. A few mechanics say to run through the procedure a few times.
They are fun. Especially when I'm next to an unsuspecting Snack Pack on the parkway. I wish I had a picture of that guy's face when he got walked by a suburban lmao
Same. I think the torque converter is the only thing that has kept my trans from un-aliving itself..
The torque converters seem to be a problem point for the 6 and 8 speed transmissions. I believe you have a 10 speed so problems seem to be less common in that trans. I don't have any input on the new IRS on the newer models. I have the solid axle from the K2XX series and the G80 rear-end earned the name "G-bomb" for a reason.
I would think reasonable WOTs aren't an issue with the stock drivetrain. If you start driving it like Tony, Dou, or myself, you are probably in for upgrades in the future.
That's what I'm thinking here, mine sees WOT at least once a day bare minimum and a couple times on the weekend there's a section of washboard on my route that will beat the tar out of you at 20mph but gets darn near buttery smooth at 60 or so it's a truck, drive it like a truck.
