Td06sl2 conversion

[NycDSM11]

Anyone think this is a good turbo setup. I have a big 16g which I converted to a td05 20g. What I am wondering is it is worth converting to a td06sl2 turbine mated to an appropriate turbine housing and adding a 3 inch compressor housing.

 

[JusMX141]

Depends on how far you plan on pushing the turbo, as well as displacement and compression ratio. If you think you'd benefit from less turbine backpressure, then it's not a bad idea...but it will come at the cost of some spool.

 

[projekt1]

Some what old thread, this is most likely a thread-jack move but its almost the same question.

I have a Big 16g as well and want to convert it to a 20g but am on the border with going TDO6SL2. I want to push the turbo as much as possible.

JusMX141, is back pressure the only benefit aside from efficiency? Is this conversion, B16 to 20g with td06sl2 something you would recommend?

Edit: This would be mated to a JMF EW O2 housing. Not internal wastegate.

 

[JusMX141]

10.96 @ 128.38 on a standard, unclipped TD05H 20G; stock 6-bolt low end. I would know- I serviced the turbo a few months ago.

You probably don't need the turbine upgrade.

JusMX141, is back pressure the only benefit aside from efficiency? Is this conversion, B16 to 20g with td06sl2 something you would recommend?

Efficiency of the turbine, the compressor, or the turbo as a whole?

I don't necessarily recommend the TD06SL2 to anyone straight-away...it's not a Genuine Mitsu turbine, there's really not that much hard evidence that it works better than a TD05H or a TD06, and even FP abandoned the 06SL2 turbine in favor of a standard TD05H for their 68HTA lineup.


You have to consider how well each wheel performs before factoring their performance as a whole. If you use a 70 lb/min compressor on a turbine that can't flow more than 40 lb/min, you'd be stuck with a really laggy 40 lb/min turbo. Same goes in reverse, only an excessively large turbine may only make a 40 lb/min compressor generate 35 lb/min due to it's slower rotating speed / heavier mass.

The only people who really benefit from using a large compressor on a small turbine are guys looking for more airflow from a small turbo used at low boost levels where most of that airflow is wastegated.

Basically, the 20G compressor is right at the limit of a TD05H turbine's flow potential. It's up to you to decide if you're willing to trade 300-400rpms of spool and some torquey "hit" for a turbo that pulls a little longer depending on your desired boost level.