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That's exactly how I feel about my 2860gen2 compared to my 2560R.
I know for sure, that my wastegate preload isn't enough, but I have to modify the rod and "hanger", that goes onto the flapper, because there isn't enough thread left. I'll just shorten both pieces and hope for the best.
Right now I can get the flapper to seal juuust enough... Boost control isn't going to be any easier with that little preload, wants to fluctuate a lot
What are y'alls thoughts on wastegate preload -- when I went to my tuners, I had a few mm of preload per the Borg literature... and was overboosting, because as you preload you reduce the effective opening angle of the wastegate, so he had me reduce preload all the way and use EBC to hit my target. I just got the high boost canister to try to see if it helps my spool (theoretically, it makes sense to me as I can still have that minimum preload but cracking open at 14 instead of 8)
If your spring in general is hard enough (with recommended preload) to not let the flapper blow open by the exhaust gases, everything is fine.
As for my part: I have a 0.4 or 0.5 bar spring in there and it feels a good bit lazier than my 2560R with a 0.6bar spring in it. I suspect the flapper to be blown open, even with 100% WG duty in my EBC, because of the weak spring.
When pulling by hand, it even felt like almost double the spring rate on the old turbo. The GTX2860 has smaller diameter can, I wonder how much difference that makes.
IIRC Garrett allows you to change/up base boost by 0.2bars with their internal gates. So giving it a little bit more tension is no problem, as long as you have no other ill effects.
edit: I try to triple the base boost with my EBC solenoid and that's not always going to work very good. Some setups can, some not
Last edited by der_vierte; 07-21-2021 at 09:34 AM.
I'm using an adjustable wg actuator from arashi. It's dual port and you can dial it in from 3-25psi with the included springs. I have mine set to 1.1bar. the Garrett gates aren't that strong. I have two 12psi cans and they won't hold more than 22 to redline but if someone wants one lmk.
Hey Andy,
would you check shipping to Germany for me? Can paypal you some money, if shipping isn't killing the deal right away... If my gate sucks, a 12psi gate would be very good for me, I don't ever plan to go above 20-21psi anyway
Hey Andy,
would you check shipping to Germany for me? Can paypal you some money, if shipping isn't killing the deal right away... If my gate sucks, a 12psi gate would be very good for me, I don't ever plan to go above 20-21psi anyway
All you would need to pay is shipping I'll send it out for free. Let me check on the cost
The GTX2860 has smaller diameter can, I wonder how much difference that makes.
The can and spring should be matched so different diameters don't come into it. A 5psi spring is not a set spring rate - it depends on the can its in as you say and also on the wastegate panny area, backpressure, flow etc. Every system installation is different so its a calculated average to achieve a "5psi" wastegate.
My turbosmart 7psi spring blows at 6 in the mid tapering to 5 at the top on wastegate only - as an example.
It doesn't even look like a Garrett unit and I havn't found a wastegate online that looks like it. If Andy is so kind and sends me one of his old gates, I'd be a very happy dude =)
I just want higher base pressure, maybe I can work on it tomorrow a little bit
All you would need to pay is shipping I'll send it out for free. Let me check on the cost
If it helps (and you don't already have a business account with USPS/Pitney-Bowles), I've been using these guys for a while very successfully (plus they insure through a third party [ShipSurance] which is a lot better than USPS. Had them mangle a an old but specific computer I sent and the claim went through in full $$$$): https://www.pirateship.com/
Andy's a Tuber - steak dinners every night off those earnings...
LOL, it would be sick if that was the case. We dont even have enough subs yet to earn anything from it. Getting people to subscribe is difficult, but we have learned now what people like and what they dont and so I think our videos are getting better overall. Let me know what kind of stuff you all want to see maybe we can make it happen you never know.
If it helps (and you don't already have a business account with USPS/Pitney-Bowles), I've been using these guys for a while very successfully (plus they insure through a third party [ShipSurance] which is a lot better than USPS. Had them mangle a an old but specific computer I sent and the claim went through in full $$$$): https://www.pirateship.com/
Interesting, I usually just go down the street the the UPS store and do it.
It doesn't even look like a Garrett unit and I havn't found a wastegate online that looks like it. If Andy is so kind and sends me one of his old gates, I'd be a very happy dude =)
I just want higher base pressure, maybe I can work on it tomorrow a little bit
I have two gates one is a Garrett unit and the other is a Pulsar. They look nearly identical and their spring rate is12-14psi. I would tighten the ever living **** out of mine and could get as high as 16psi base pressure just off the gate alone. I also have an adjustable bracket if you want that also.
If your spring in general is hard enough (with recommended preload) to not let the flapper blow open by the exhaust gases, everything is fine.
As for my part: I have a 0.4 or 0.5 bar spring in there and it feels a good bit lazier than my 2560R with a 0.6bar spring in it. I suspect the flapper to be blown open, even with 100% WG duty in my EBC, because of the weak spring.
When pulling by hand, it even felt like almost double the spring rate on the old turbo. The GTX2860 has smaller diameter can, I wonder how much difference that makes.
IIRC Garrett allows you to change/up base boost by 0.2bars with their internal gates. So giving it a little bit more tension is no problem, as long as you have no other ill effects.
edit: I try to triple the base boost with my EBC solenoid and that's not always going to work very good. Some setups can, some not
EBC set point is limit to around 2X the wastegate base pressure. You are correct, the wastegate is opening from back pressure in the manifold. When the EBC duty cycle is above 80% the spring pressure is insufficient to hold the wastegate closed. Try to keep the EBC set point < 2X the base spring pressure. I have an 10psi Tial wastegate and I run EBC at 14psi. Control is awesome.
I'm embarrassed to admit how long it took me to do that with the new version of paint.... You used to be able to just use the scissor tool to cut it out and just paste it in but there are like 5 different programs for it on my surface now lol.
Well, seeing as how Im back from MATG now I decided to turn up the boost on this turbo. Now that I have the GReddy Profec OLED EBC I can easily control the boost curve to be exactly how I like it. I have boost coming in soft @20psi and ramping up to 24psi by redline. It got a little bit lean on the top on this pull but I since added fuel up there. This turbo really pulls like a freight train on the topend this is the fastest my car has ever felt it just rockets to redline now. 425whp @24psi in 90+ weather. Not bad
07-21-2021, 03:32 AM
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