thats pretty interesting you mentioned that about the t-bolt clamps bryan i have actually
noticed those markings on couplers..the reason i dont trust the worm clamps is because they need to be tightened down constantly because the bolts tend to back out and the clamp of course stretches. some of those couplers are a pita to get to..lol

 

It's pretty darn obvious to me what is wrong , as everyone that has an upgraded wheel with a clipped turbine is having the same issue and no-one except for 05rex8 (who actually did what I suggested) has solved it.
Then again no-one has really tried it with a bigger actuator either which according to the experts is the "correct" way to fix your issue .
Until you either fit a bigger actuator or do the mod I (and BNR ) suggest you will not get the results you desire ..... it really is that simple .

And BTW : it's not like you are butchering anything by taking 3mm off the end of the arm - it will still have the full range of adjustment you had before .

 

It's funny about this coupler thing - when I was fitting my kit I went to replace all the worm clamps with T bolts ones and a guy that does a lot of work on turbo cars told me not to and that they would leak . So I stuck with the worm clamps and have never had an issue ....

 

Alright so what you are saying Brettus is that the reason everyone is having problems with getting the boost to hold is...? because they havent modified the actuator by making it shorter like you suggested?

I have had no problem getting my turbo to hold boost on the actuator that Bryan sent to me. Kane can be the witness that it held boost up top. I wanna say we got 13 psi then it died to around 10.5-11 psi at redline.

So in my application I am gonna end up changing anything because I dont believe it was necessary when I could hold 7-8 psi all the way to redline on just the wastegate.

 

/\ Are you sure that you have the stock Greddy actuator ?
Also - aren't you having problems getting decent dyno numbers ? Until you make 350whp (which is what the BNR should be capable of) you can't exactly say you have this issue licked ......

 

I have the stock Greddy actuator ported by Bryan.

So you are saying that there is no way in hell that I am able to hold 7-8 psi on just the wastegate with no BC?

About the dyno number, I am not having an issue with holding boost if thats what you are trying to state. I have dynoed three times since having the BNR turbo.

1st- bad tune
2nd-maxed out MAF, and some other problem
3rd- had 2 couplers that were split

I have NEVER had an issue with getting my desired boost!

 

the actuator - is it the stock greddy unit ? - not talking about the wastegate porting .


Well i do believe that you did this but you also said your numbers are not that great so until you actually get some good numbers you can't say with any certainty that you don't have the issue that others on here are talking about .

 

Here is my first ever dyno sheet with the BNR turbo, the tune was horrible. It was done by an individual that just messed up Kane's tune completely. Not to mention the AFR's were a big issue with what were the proper readings (mine or the dynojet reading) So this is to prove a point since I feel I am being called a liar about this whole actuator BS. I will dyno here soon enough when I get my couplers in.



Seems to have held boost pretty damn well on just the stock Greddy actuator. All the way to redline just like I said!

 

Well I have known what my problems were after each dyno session. I should have had good numbers when Kane came out here to tune my car. But I still had the stock Greddy couplers. I should have just upgraded them from the get go.

 

A local here just recently turbocharged his RX8 with the BNR upgraded Greddy Turbo. His tuner was able to get him 332 rwhp and 280 tq on a mustang dyno. However on his first tuning session he was having trouble holding boost also. I showed him Brettus's thread and didn't talk to him until he told me his dyno numbers. Not too sure if the actuator was giving him problems, and will definitely ask him what they did to hold boost.

 

J Cab . I apologise if you thought that I was trying to call you out - nothing could be further from my mind . I am only trying to make sense of the issues the people on here seem to be having and your setup seems to be the exception so that is why I keep asking you to clarify about the actuator .
I only wish you had posted that dyno when we were all asking for it a few months back .

 

hold on tho...greddy actuator or a different one that bryan supplied, J.Cab?

 

Ah - I remember talking with someone about this - perhaps you ?
Please do find out what they did . Great numbers BTW ..... see if you can get him to post the dyno !!!!

 

I'm gonna off myself..........

 

Because that is a horrible representation of what the BNR turbo is. Not knocking the turbo by any means. But why would I want to show a horrible dyno sheet when the tune was way off and I had other problems. I would rather just wait to post a dyno sheet when its one with no problems and the way a BNR turbo dyno sheet SHOULD look like.

I did this strictly to show that with the Greddy actuator that 7-8 psi can be achieved, and all the way to redline to top it off!

Not trying to come off as a d***. Just stating what I have.

 

Greddy actuator..all I know is that Bryan ported the wastegate. But did nothing to the actuator.

 

I posted mine and it looked like crap. That one you just posted looks a million times better than mine did.
That's how we were able to figure out a solution to my spike problem though.

 

cool. just wanted to make sure.

 

ehh...I no BS really hope soon that I can post a better dyno sheet. My 2nd dyno session I believe the max I was able to get was 290whp/245tq @ 9psi. I have no doubt in my mind that at 9-10psi I couldnt/wouldnt break 300whp easily.

But I do love how the turbo continues to want to make power all the way past 8k+

 

OK - point taken .
The fact that you could do this does throw my theory into doubt so perhaps i am way off track .

 

that's what I like to hear!
I will probably end up getting this turbo upgrade once mine requires a rebuild. I am also looking into e85 conversion....forget 300 rwhp...I want 400rwhp! lol

 

Before I capitulate completely can you at least do me one small favour . Tell me how much thread is left exposed on the actuator arm and if the lock nut is still in place .........

IE was the arm adjusted by BNR ?

 

The AFRs (as shown on that plot) are actually pretty good on the high-power pull.

 

Tail pipe sniffer; it was reading over a point leaner than the factory O2 sensor.

 

Why is this? CAT?
They couldn't just recalibrate?
I'd be pissed (and withholding payment) if my dyno operator had equipment like that.