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Originally Posted by 9krpmrx8
(Post 4049078)
Speaking of that, I read how to do it but I need to have the turbo in hand because I'm not getting it :lol:
Expect a PM over the weekend :) |
Originally Posted by Brettus
(Post 3222082)
270 is a good result with that setup but it does seem to be at the high end of what people normally run .
Considering that the turbo is only supposed to flow about 220g/s efficiently at 7psi and you need over 270g/s to make 270whp , I'd still say 270whp is pushing it past its design parameters . having a hard time attaching the excel file that has the info logged on the AP :/ |
Originally Posted by warren(silver-roxy-8)
(Post 4054043)
my stock greddy turbo (so I believe to be stock) was able to produce 291.48 g/s....I haz lots of boosts?
having a hard time attaching the excel file that has the info logged on the AP :/ |
i've yet to do a dyno run :/
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Seems Garret figured this out before I did LOL
How can I adjust the turbo boost? Adjusting the boost is straightforward. However, it depends on the type of boost controller. For a standard Wastegates actuator, simply recalibrate the actuator to open (more or less) for a given pressure. Changing the length of the rod that attaches to the Wastegates lever accomplishes this adjustment. For mechanical boost control systems, adjustments may involve changing the setting on a regulator valve(s). For electronic boost control systems, adjustments may need to be made to the vehicle's engine management system. For an external Wastegates, adjusting the boost often requires turning the adjustment screw (when equipped) to increase/decrease spring load, changing Wastegates springs, or shimming Wastegates springs. IMPORTANT: WHILE ADJUSTING THE BOOST IS STRAIGHTFORWARD, OFTEN THIS CHANGE REQUIRES MODIFICATIONS TO THE ENGINE FUEL MANAGEMENT SYSTEM! |
If they had tried to tell you this before you finally figured it out on your own I'm sure you would have argued with them about it too .... :)
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Originally Posted by TeamRX8
(Post 4054273)
If they had tried to tell you this before you finally figured it out on your own I'm sure you would have argued with them about it too .... :)
I posted it it up because the 'experts' on here have continually informed me that I have being doing it wrong whereas the Garrett 'experts' say it is a legitimate way to do it. Who is right and who is wrong is not always as black and white as you seem to think. |
Originally Posted by Brettus
(Post 4054656)
the Garrett 'experts' say it is a legitimate way to do it.
The Garret guys will tell you its OK to increase the tension on the actuator arm by shortening it. The will NOT advise you to restrict the opening angle of the wastegate flap, which is what you have done. |
/\ have to admit I kinda expected that reply .
NVM i'll just enjoy what I have . I'm sure that eventually someone else will try it and see for themselves just how effective it is . |
Originally Posted by Brettus
(Post 4054686)
I'm sure that eventually someone else will try it and see for themselves just how effective it is .
Hitting yourself in the head is an effective way to cure the hiccups. Unfortunately, you are unaware of how effective it is until you regain consciousness with a massive headache. |
Originally Posted by MazdaManiac
(Post 4054749)
Do you really think I hadn't tried exactly that at one point?
. Didn't work :dunno: Disclaimer : not a true story . Except for the bit about knowing someone with a Delorean . What a POS !!! |
Lol^ Good Thread! I think more p people will be willing to go turbo with this guide.
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Originally Posted by Brettus
(Post 4054924)
I tried time travel recently . Borrowed a friends DeLorean , found a straight piece of road , set the controls to 2020 , primed the flux capacitor then accelerated to 87 MPH .
Didn't work :dunno: Disclaimer : not a true story . Except for the bit about knowing someone with a Delorean . What a POS !!! Lolz !!! Delorean... All time -fav :naughty: |
Originally Posted by Brettus
(Post 4054686)
I'm sure that eventually someone else will try it and see for themselves just how effective it is .
Eventually I'll get that EBC hooked up too :naughty: |
1 Attachment(s)
Recent discussions led me to do a little research and as a result I plotted the flow from my turbo vs the compressor map for it .
What it tells me is that I'm running the turbo right on the choke line at maximum flow but right in the meat of the most efficient part of the map in the mid range . Not good for a track car but just fine for the street . https://www.rx8club.com/attachment.p...1&d=1314561794 NB! *There is more than one map for the 57trim out there but I believe this is the correct map as it makes more sense when comparing the 57 with other trims. *The boost recorded here to get PR is taken just after the turbo - NOT the uim . *Interesting to see that from this map the 57 trim is equivalent to the GT3071 in flow |
Someone needs to learn to read those flow diagrams better.
So, from 5500 RPM and up, you are toasting your air and you can't even safely run that turbo at a Pr of 1.6 past 6500 RPM. You claim 330+ HP on this turbo? At what RPM? 6k? lol Where is the turbine flow map so we can really show you what is going on. Just as a note, you need to be able to flow about 45 pounds of air at 7200 RPM to hit anything over 315 hp. |
Originally Posted by MazdaManiac
(Post 4065438)
Someone needs to learn to read those flow diagrams better.
So, from 5500 RPM and up, you are toasting your air and you can't even safely run that turbo at a Pr of 1.6 past 6500 RPM. You claim 330+ HP on this turbo? At what RPM? 6k? lol Where is the turbine flow map so we can really show you what is going on. Just as a note, you need to be able to flow about 45 pounds of air at 7200 RPM to hit anything over 315 hp. It may have escaped your notice that this 57 trim map is almost identical to a 3071 map in the PR ranges we are talking about - a tad better in fact depending on which version of the 3071 map you compare with. I don't think you would argue that the 3071 can make 330 ? And - it's a greddy with a clipped turbine . If you can find a turbine map for that and somehow work out that it won't flow 330 then go for it . |
Originally Posted by Brettus
(Post 4065482)
Perhaps you need to think a little before being so critical MM . For a start 45lbs IS what the turbo is producing at 7000rpm, 1.9PR and 60% efficiency.
Originally Posted by Brettus
(Post 4065482)
It may have escaped your notice that this 57 trim map is almost identical to a 3071 map in the PR ranges we are talking about - a tad better in fact depending on which version of the 3071 map you compare with.
I don't think you would argue that the 3071 can make 330 ? I don't use a 3071 and I never have.
Originally Posted by Brettus
(Post 4065482)
And - it's a greddy with a clipped turbine . If you can find a turbine map for that and somehow work out that it won't flow 330 then go for it .
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Originally Posted by MazdaManiac
(Post 4066010)
So, you are admitting that you can't read the compressor chart correctly?
.
Originally Posted by MazdaManiac
(Post 4066010)
No, it is not and no I do not.
I don't use a 3071 and I never have. . Anyway - are you actually calling me out here and saying my dyno showing 333whp is BS or are you just being an asshat ? Also : this is what Bryan at BNR has to say about max flow from the turbine .
Originally Posted by Bryan@BNR
(Post 3579321)
10 cm2 is very small (.72 a/r give or take). That housing will only make around 350-360 RWHP max. Doesn't matter what compressor you put in that turbo, it is game over for the turbine housing...
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/\ Yeah - that result from yesterday pretty much confirms exactly what MM is saying - you need 45lbs on a Renesis to make 320ish whp .
I think the 333 result was a bit of a fluke which occured as a result of the melted centre exhaust divider giving the engine better efficiency. Why he can't read a compressor map is a bit of a mystery to me however . |
So a Greddy turbo is not that much better than a properly operational and tuned NA engine?
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Originally Posted by TeamRX8
(Post 4093896)
So a Greddy turbo is not that much better than a properly operational and tuned NA engine?
322 not 223 |
I was referring to the 270 g/s post, 223 is low for NA per my reference text
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Originally Posted by TeamRX8
(Post 4093917)
I was referring to the 270 g/s post, 223 is low for NA per my reference text
Yes correct - the stock Greddy turbo has to operate well outside it's efficiency range to significantly exceed the flow of an NA engine . A good reason not to run a stock Greddy..... IMO |
Originally Posted by Brettus
(Post 4093583)
Why he can't read a compressor map is a bit of a mystery to me however .
Because, unlike you, I am not sitting cross-legged in my mom's wood-paneled basement, in my underpants huffing Reddi-Wip cans and pretending that my cross-correlated assumptions are actually valid conclusions. |
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