blow off valve and tdo6 20g question ....

[NJgsx]

hey guys ... i recently posted a turbo upgrade question but i have a tdo520 and im tihnking of just doing a tdo6 20g .... will i be ok running it internal wastegate because it is my everyday car so i wont be running a high amount of boost .... i really like my tdo5 and id like to now go to a tdo6 ... so ### do u think of a tdo6 on an internal wastegate ?????

my next question is .... im buying a new bov this week... my greddy type-s is leaking bad and im thinking about getting a tial bov ... what do you guys think of that bov and is there anything else i shoudl look at??

 

[CanadianTSi]

No point in an upgrade that small, I'd stick with what you've got until you've maxed it out. A 20g will take you plenty far.

The Tial cannot be recirculated, keep that in mind.

 

[fourreGsixty3]

Just get a cheap 1G BOV for 90$, or less if you buy it used they can hold 23psi before leaking. Like canadian tsi said going to a td06 20g would be pointless when you already have the td05 20g. Your best gains would be from supporting that td05, the gains that you will get from a td06 20g will be minimal.

Dustin

 

[Kevin Jewer]

A 50 trim flows the same air as a 20g. I've logged 6H 20Gs at up to 49 lbs/min, and 50 trims up to 50 lbs/min. I also ran faster on the 20g, but the car was setup a little better with it. I have no doubt that identical times can be run on either turbo.

To the original poster, are you already running the 5H 20g? If so I don't see a good reason to upgrade to a 6H 20g. Your total compressor flow is not going to change. VE will be improved, knock resistance will be better, etc, but I don't think it's worth making the change now. If you haven't installed the 5h 20g yet then yes, I would recomend the 6h version. In fact I had SBR make me one a few years back with a 3" compressor cover on it. That's like the ultimate 20g. I had decent sucess with the interal WG, but I specifically left it the stock size. Larger flappers will let you run lower boost, but blow open at high boost. I'd rather run more boost daily if it means I can max the turbo out on race gas. With enough work put into the WG exit area and coresponding portion of the O2 housing you can get creep down to a manageable level for daily pump gas driving. I also ran an external gate venting all 4 runners (an old skool FP piece I picked up cheap), which worked flawlessly and is highly recomended as soon as you can work it into your budget. Solid, repeatable boost control is an absolute necessity IMO.