Sport compact car had an issue a while back about turbos that had some good info in it. If I can find the article I'll tell you where to get it.

 

When cutting the car off instantly, it drops the oil pressure immensily leaving it to coke on the turbo. This creates build up and as someone said earlier, blockage. This is not good. Make sure you give your turbo time to loose the oil pressure slowly. anyways, If I were you, I would pick a smaller turbo and go for low end torque. The smaller they are, the less time it takes to spool up and less lag. But, they are useless for top end. I would pick the smaller turbo because I never go to the track and race stop light to stop light. (Per say). Up to you though.
Also whats nice about smaller turbos means lesser psi needed and that means you dont need to build up your internals like you would if you had a large turbo. For example, pick a turbine like a T3. Not a junkyard/stock turbo, but an aftermarket one like HKS which is ball bearing (best kind) and is also aerodynamic, you will feel barely any lag and it will feel like you have just increased its horsepower. Very nice add on.
I once again highly suggest a smaller turbo for quick response street racing. If you are using the car as a daily driver more than a race car, then get a smaller turbo. You will feel no lag, and just gain power in the lower rpm bands. An HKSGT2835 will start building boost at 1500rpm to 2000rpm. These start working hard around 2500rpm to 3500rpm.
I feel this as an awesome setup for vtec motors because you have the boost in the beginning and the vtec in the top end. Perfect combo.
Hope that helped.

 

OR get a if you want to run more boost get a bigger turbo and a bottle to occupy the lag time

 

Run a JRSC at 20psi and tell me what happens. Come on, he is trying to boost his car, NOT break 1/4 mile records.

Also, there are a lot of factory turbo cars, and most of them have relatively normal oil change times. The oil change interval required really depends more on the person, how they drive, the turbo being used and its boost level, along with what oil they use. The extra wear and tear on the oil is due to the heat of the turbo.

The HKS GTs are really nice but cost a bundle.

 

I have a factory boosted car running 21 psi (stock 8) so I do know that some cars can handle it, but I wouldnt try that on honda internals. Recommended oil change every 3k miles for my car.

 

Well, unless he decides to get another car, that is kind of irrelevant.

Recommended change interval for your car may be 3K, but when was your car built? I'm sure late model turbo cars have longer intervals, just as NA cars do.

 

granted this car is a 2001 but my 93 rx7 was recommned 3k also.

anyway alil off the topic.

So, I think you have enough to answer your original questions

 

with ur LS...u can boost about 9 psi cuz of ur low compression and still run stock injectors andd waht not. this guy i knwo runs 9 psi on his RS makes 186whp or so...that's not bad at all. SC is more practical for daily driving cuz of the instant boost...a turbo will beat any SC in all out drag power...but around the track could be a diff story, esp in autocross, where a turbo mite not have enuf time to spool. so dont count out the JRSC...it's good ...

 

i'll only be racing 1/4 miles like on the street and on the drag strip.
this is also my very daily driver too.

 

Must be a tiny turbo or runing stock exhaust.