20g internal gate question

[hiimt0ny]

On slowboyracings bastard 20g what is the difference between the 31mm internal gate and the 34mm internal gate? Other than the 34mm internal gate being $60 more.

 

[VelocitàPaola]

On slowboyracings bastard 20g what is the difference between the 31mm internal gate and the 34mm internal gate? Other than the 34mm internal gate being $60 more.

The 34mm has a larger flapper and the hole has been ported to a larger size. This allows for more exhaust to bypass the turbo in an attempt to better prevent boost creep. I'd say it's worth it with a turbo like the 20G.

 

[CanadianTSi]

Whats the difference between 31mm and 34mm's ? Seems pretty logical to me

 

[4g63t Power]

If your getting that turbo... Deffinatley go with the 34mm wasegate... if you dont boost creep(unwanted increase in boost because of not being able to bypass enough exhaust)will be a huge issue. It is deff worth the 60 bucks!

 

[black91awdturbo]

well guys dont forget the huge down side to the 34mm gate it blows open at high boost!! If you want a big turbo do it right save up and buy a external gate!

 

[1stGenRocks]

What boost do you plan to run on it? If your going to run higher boost all the time keep the small gate so it doesnt blow open.

 

[Steve93Talon]

I'm running a 20g with a 31mm internal gate, and it holds 25psi rock solid. I had a 34mm flapper housing on it, and it would only hold 23-24psi and fell to like 20 by redline. Stay away from larger internal flappers, if it's creeping you're probably just not running enough boost

 

[CanadianTSi]

if it's creeping you're probably just not running enough boost

 

[BaddAssGst]

if it's creeping you're probably just not running enough boost

Very well put.

 

[No_Skillz]

Isn't there a way to modify the wastegate arm so you get the benefits of bigger flapper w/o it blowing open at higher boost?

 

[black91awdturbo]

Isn't there a way to modify the wastegate arm so you get the benefits of bigger flapper w/o it blowing open at higher boost?

well you can alway port the hell out of the waste gate hole, how ever you can only go so big cause if you go over board the flapper wont seal. The arm you can tightin it up but there is a limit to how tight you can make it.

 

[VelocitàPaola]

Isn't there a way to modify the wastegate arm so you get the benefits of bigger flapper w/o it blowing open at higher boost?

In theory, that's a good idea, but it cannot be done. How far the wastegate opens is a function of the actuator's maximum travel. After lengthening the wastegate arm, the actuator's travel is still the same, but now, though the flapper might open to 90*, it'll be stuck at 50* when the actuator is fully "closed."

The only way to fix this would be to either get an external setup, or replace the original internal wastegate with an electronic actuator and boost sensor (this might be easier to tune and control in the long run).

By the way, would anybody be interesting in something like that? Has it been done? I'm always looking for new ideas to develop.

 

[Steve93Talon]

replace the original internal wastegate with an electronic actuator and boost sensor.

By the way, would anybody be interesting in something like that? Has it been done? I'm always looking for new ideas to develop.

http://www.holset.co.uk/files/2_5_1_7-actuation and sensor systems.php