Questions Regarding Turbo Kits

[blink21me]

I still remember the last time I saw one of those bad boys drag race... kawawa siya talaga sa Civic Sir na kalaban niya...

In one corner, 180-200 hp Civic... in the other 275+++ hp Lancer... both FWD... both on 15-inch mags with street tires... I think the Civic hit the 1/8th mile mark before the Lancer even found traction...

ha! shows that FWD's need that much power... It's either the guy in the lancer didn't know how to launch, or he put allhis money to the engine and didn't throw a penny to any of the suspension components... There's a local here driving a built NA Integra GS-R pushing no more than 200 to the wheels... He hits high 11's to mid 12's...

[niky]

I think it's a little of both. I've seen Evo-engined FWD Lancers at the track, and they didn't seem too unbalanced... but then again, you're not trying to do a drop-clutch burnout on track.

Probably, you'd have to launch at a very low rpm, letting it bog a little, or do a roll-on clutch-drop start so as not to overly stress the drivetrain...

Even though they're not the most balanced or useable of cars, I'm still itching to try one...

[Jun aka Pekto]

I think it's a little of both. I've seen Evo-engined FWD Lancers at the track, and they didn't seem too unbalanced... but then again, you're not trying to do a drop-clutch burnout on track.

Probably, you'd have to launch at a very low rpm, letting it bog a little, or do a roll-on clutch-drop start so as not to overly stress the drivetrain...

Even though they're not the most balanced or useable of cars, I'm still itching to try one...

You also need gooey low profiles that have excellent traction. The drawback is that while they grip good, they also wear out faster because they're made of a softer rubber compound. Plan on spending $1k or a bit more for 4 tires every few months.

[blink21me]

low profiles aren't good at all for launching no matter how "gooey" they are... that's why "dragsters" are on fat slicks...

[niky]

Hehe... the problem with slicks, though, is that they're undriveable on the road...

In full drag trim, a FWD car can be on staggered sizes, with larger wheels in front, 14" steelies or worse, emergency spares in the back. The front tires will be 15" or so, with wide tires partially deflated for extra launch grip...

Can't imagine driving on that everyday... even though the dragsters drive their cars to the strip...

So low pros with wide rubber will be fine with me...

As a rejoinder, though, I know some fellas hitting 13.5s with 15" rims and 50 series tires, and no funny stuff on the back hubs (full sized wheels there, too) . They're intermediates, though, so they do have to take them off at the end of the day, to preserve their lifespan.

[Mamar]

OT: Pwede po ba lagyan ng blow off valve ang mga diesel turbos??
For example kia sedona it has a 2.9 tutbo intercooled engine! pwede ko ba lagyan yan ng BOV??TIA

[niky]

Depends, I think... I don't know if the ECU will like it. And you probably don't need it. Most turbo tuning on turbodiesels can be done via piggyback ECU or chip re-tuning.

[Mamar]

ahh.. gusto ko lang sana pag tripan at para astig sana! hehehe....

[Dieseldude]

Mamar,

Most turbos have blow-off valves, either for gas or diesels. These are normally referred to as wastegates. Boost pressure is plumbed through a pilot line to the wastegate actuator. At a predtermined boost pressure, the actuator pushes a valve to dump exhaust gasses to the exhaust pipe, and bypass the turbine wheel. This limits turbo rpm and boost pressure, providing safe operation to the turbo, as well as the engine.

[m_ron]

Mamar,

Most turbos have blow-off valves, either for gas or diesels. These are normally referred to as wastegates. Boost pressure is plumbed through a pilot line to the wastegate actuator. At a predtermined boost pressure, the actuator pushes a valve to dump exhaust gasses to the exhaust pipe, and bypass the turbine wheel. This limits turbo rpm and boost pressure, providing safe operation to the turbo, as well as the engine.

Specially on high rpm.

[blink21me]

Most turbos have blow-off valves, either for gas or diesels. These are normally referred to as wastegates. Boost pressure is plumbed through a pilot line to the wastegate actuator. At a predtermined boost pressure, the actuator pushes a valve to dump exhaust gasses to the exhaust pipe, and bypass the turbine wheel. This limits turbo rpm and boost pressure, providing safe operation to the turbo, as well as the engine.

eerrr... wastegate and blow-off valve are not the same...

Wastegate
Most turbos for street use will have an integrated wastegate, an internal wastegate. This is the simplest wastegate to use, from an installation standpoint, since it is already attached to the turbo and requires a minimum of vacuum hoses to work. The drawback of the internal wastegate is that on occassion, it will not flow enough exhaust gas for "perfect" boost control. Higher-flow wastegates are available, the external wastegate. These allow for more precise boost control as well as flow capabilities for very high powered engines, with a drawback of more moving parts and more complex vacuum configuration.

Blowoff Valve
An object in motion tends to stay in motion. That's the key principle behind having a blowoff valve in your turbo system. While not exactly necessary for a turbo system to work, a blowoff valve will help turbo boost response between shifts. For very high-powered vehicles, one blowoff valve may not be enough to vent excessive boost when the throttle is closed; in this case, it's perfectly acceptable to use several blowoff valves.