Ported Wastegete?

[slash]

If all your exh runs out the same tube and you add more and your boost increses presure above the set dump PSI you just have too much restriction, the main reason the gate is there is to stop build up PSI by rerouting presure IF it can not get rid of it boost will increse . ONE EXH OUTLET AN ADJUSTABLE BOV might fix the creeping problem by venting intake PSI above a desired level ( mines set at 35lbs )

 

[Tonysnoo]

It seems that to run lower boost numbers at low altitude (1000 ft) the waste-gate needs to be ported? I am hearing that the 2860 will only be able to be turned down to 7.5 ish at this altitude with an unmodified waste gate. QUOTE]


Would it be possible to prove this out? Couldn't you just un pin the actuator off of the waste gate for a test run and see how much boost you can make with the gate wide open?

If it still boosts over your goal pressure, then it would verify that that little hole needs to be ported bigger..........or is my logic is flawed?

 

[TheBreeze]

It seems that to run lower boost numbers at low altitude (1000 ft) the waste-gate needs to be ported? I am hearing that the 2860 will only be able to be turned down to 7.5 ish at this altitude with an unmodified waste gate. QUOTE]


Would it be possible to prove this out? Couldn't you just un pin the actuator off of the waste gate for a test run and see how much boost you can make with the gate wide open?

If it still boosts over your goal pressure, then it would verify that that little hole needs to be ported bigger..........or is my logic is flawed?

I dont know if it is flawed or not. I guess I thought more people would have heard of and dealt with ported waste gates. It is a service cutlers and ovs provides. The guys in europe seem to be the ones that have the most experience and know how when it comes to low altitude 2 stroke turbos, but there has to be some western hemisphere guys doing it as well. I know i have seen posts regarding boost creep problems down low in the past, but now no one seems to know anything about it.

 

[Wheel House Motorsports]

its easy. go nuts with the thing and open up the hole to the flapper as big as you can and allow it to seal still, also clear the path into the wastegate. i had insane boost creep on my rx1 turbo setup the first year, ported it out. now i can run whatever i want and it holds rock solid. problem is your actuator is still going to try and make a certain amount of boost, so this wont allow you to turn it down anymore.

and good luck building boost with the flapper unhooked. when my hanger got loose the thing would barely make any boost after 10-15 seconds wot... and that was just loose. not off.

if you want some more info i might be able to dig up pictures from my porting endevor.. just pm me.

 

[JasonAK]

It seems that to run lower boost numbers at low altitude (1000 ft) the waste-gate needs to be ported? I am hearing that the 2860 will only be able to be turned down to 7.5 ish at this altitude with an unmodified waste gate. QUOTE]


Would it be possible to prove this out? Couldn't you just un pin the actuator off of the waste gate for a test run and see how much boost you can make with the gate wide open?

If it still boosts over your goal pressure, then it would verify that that little hole needs to be ported bigger..........or is my logic is flawed?

My sled will boost 4 psi. with the wastgate unhooked. But lags realy bad that way.

 

[JasonAK]

you are not the only one looking for a actuator for 3-4psi boost.

if you find one, let me know

Dakota Performace claims to have a 6psi actuator that works on the Push Kits. I plan to order one from them with there power comander set up for the Push Kit. Unless there is a stand alone ecu ready to go by then

 

[YETIms]

that is the reason why i need a 4psi actuator. you need it to be able to control boost 4psi +

i have 6, 7, 8, psi actuators here but you can control boost only from that number +

Dakota Performace claims to have a 6psi actuator that works on the Push Kits. I plan to order one from them with there power comander set up for the Push Kit. Unless there is a stand alone ecu ready to go by then

 

[mmsports]

4 lb

That low is almost in possible. Think about it with out it hooked up you can build 4 lb it would have to start to open up at like 1 lb of boost.I have got one down to 5.5 and it was soft on bottom because it was opening too early.

 

[TheBreeze]

Great info!

 

[YETIms]

i have one from 3K it work perfect and keep the boost at 5psi. but it is to expensive.

That low is almost in possible. Think about it with out it hooked up you can build 4 lb it would have to start to open up at like 1 lb of boost.I have got one down to 5.5 and it was soft on bottom because it was opening too early.

 

[JasonAK]

That low is almost in possible. Think about it with out it hooked up you can build 4 lb it would have to start to open up at like 1 lb of boost.I have got one down to 5.5 and it was soft on bottom because it was opening too early.

This is true. I modified the original one that came with my kit. When I was done the acutuator would open at 1psi causeing to much lag.

I have set my goal at 6-7psi for 500-3500ft. running Avgas 100LL. I can live with the 8-9psi I have now but I will have to upgrade to 4 Injectors and mix 116 in with the 100ll.

Jason

 

[Tonysnoo]

My sled will boost 4 psi. with the wastgate unhooked. But lags realy bad that way.

Cool! so the waste gate is capable without porting, now finding the actuator is the issue, cause you certainly don't wanna run the gate open.

I wonder if something ol' Gus taught me might work. Last year, I welded on a fitting in the big part of the pipe to get a higher pressure signal than the boost (for fuel reg). I did a lot of experimenting with this concept and found different configs netted different pipe pressure.

You can feed that pipe signal to the actuator. The pipe pressure is always some value higher than boost.

For instance: if you had a 6 psi actuator and your pipe pressure was 2psi higher than boost your actuator would hold boost at 4 psi.

Certainly cheap to do and worth and experiment.

 

[Wheel House Motorsports]

good thinkin tony, i forgot about that little trick!! pretty good idea though!!

 

[Turbo11T]

good thinkin tony, i forgot about that little trick!! pretty good idea though!!

Another thing that could be tried is using dynamic pressure. This would involve a pitot tube. The dynamic pressure will be higher than static pressure.

 

[FBM]

2011 M8 with BD PG riding at 1300 ft. Sled came with EBC. Ran 6.4 lbs of boost set as low as it could go. Running straight AV at 7.5 lbs. No issues. Not sure about porting the gate. My Powderlites Apex had a ported gate. Came home supposedly set to run 10 lbs at 1300ft. 12 lbs was as low as it would run.

 

[product tester]

I have accuators when set up right run 4 to 5 #S they are 60 dollars.
801 668 6344 shain

 

[JasonAK]

I have accuators when set up right run 4 to 5 #S they are 60 dollars.
801 668 6344 shain

Nice! I need two of them. I will give you a call.