High Flow Vses New Turbo

[Marcus89]

Just wondering as to why people generally go for hi flow turbos rather than a brand new turbo? From the prices i have seen the high flow option really isn't all that much cheaper and if you end up going for BB high flow it cost about the same or more than aftermarket garret turbos.

Any information is appreciated as I am looking at one of the 2 options. Was thinking of high flowing but the price seems more than i expected and may as well just go new it seems.

[SargeRX8]

The weakness in the stock turbos is their turbines and the bearings. A stock turbo can push 12psi with minimal lag as its optimized for your car. Highflowing the turbo will bring in a new turbine and ballbearing setup with the same boosting characteristics as previous. You will be able to hit boost faster than say, upgrading to a bigger turbo(GT3076 for example). Although a newer turbo may flow more air and create more pressure, your turbo is built for your car and improving your turbo will give you a significant boost.

I'm running a highflowed VL turbo with a GT3071 BB turbine. Comfortably boosts 16psi and I can hit full boost by about 3krpm, positive boost at about 2krpm.

Welcome to the world of upgrading turbos. Where there are so many f**king variables, your brain will explode.

I'm in the process of upgrading my highflowed to something which can push more HP at lower boost. Read my thread for some ideas about turbos(its called Need Clarification or some shit).

Edited May 23, 2010 by SargeRX8

[wolverine]

A highflow is a brand new turbo as far as the rotating bits are concerned.

The housings are more or less a non-wearing part so the advantage is that a highflow goes back where it came from with no other costs or modifications.

[Flargh!]

Aftermarket turbos rarely bolt straight on without manifold, wastegate and exhaust modifications, so if you're only chasing moderate power levels then a hi flow is perfect.

[GTScotT]

correct

the turbo itself might not be that much cheaper, but the parts involved in bolting on something aftermarket change that.

another advantage alot of people see is that it looks stock. cops wont bug you, and you get a good upgrade over stock without changing too much.

[adis]

cops usually dont pick on hiflow turbos... Main reason. Plus straight bolt on. =)

[hypergear]

Highflowed turbo is a brand new turbo engineered to make the most out of your stock housings. So your housings would be the limit factor in terms of max power. The engineering process is inversed, lots of factors to consider, and lot harder to get a perfect result.

With brand new turbos, The housings are engineered refer to CHRA assembly and engine size. So it would have some advantage interms of max power and boost control, How ever it might not fit your stock setup.

So if you are just after abit more power for every day street use, high flow is recommended, else get a brand new turbo.

[Marcus89]

Ah yea I see people having to upgrade manifolds and going external gate the cost of a new turbo definitely starts to climb quickly when they are taken into consideration.

Since i have the r34 turbo with the bigger rear housing high flowing is probably a good option. Gonna see if i can find someone reliable locally that could do the job for me as i can't go without a car for long periods of time unfortunately.

Thanks for the help