GT2554R Record??? leads to a blown motor - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-23-2016, 11:42 AM   #21
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Originally Posted by 1993z32 View Post
Would like to compare dyno's if you still have yours available, just out of curiosity.
$150 T3 50 trim chinacharger (compressor wheel plots like a 2554 wheel)
BEGi exhaust manifold
3" exhaust
ms3 (seq. fueling & seq. spark)
93 octane
really horrible $50 460cc rx7 injectors and the stock fuel pump
16 timing in boost

I started adding boost up top, like you, after I did this dyno:



Those are corrected number from the dyno dynamics it was run on, but it matched all my other dynojet runs pretty spot on.


overlaying them they are pretty close, i never liked how it spooled on the dyno in this plot, it always logged much more lineraly like yours.





nice to see someone else not suck at 1.6L though
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GT2554R Record??? leads to a blown motor-144761d1437240171-mk-turbo-group-buy-2-now-going-80-nov_13_2010_chinacharger_7338f8dc78b2764617d.jpg  

Last edited by Braineack; 02-23-2016 at 11:53 AM.
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Old 02-23-2016, 11:44 AM   #22
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Originally Posted by JasonC SBB View Post
15 psi -> 75 ft-lbs/atmo/L still too high. Highest numbers I've seen are closer to 70.
So what you're saying is, my motor is safer than this graph says. Perfect!
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Old 02-23-2016, 11:46 AM   #23
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In my opinion you need to upsize the turbine/hotside/exhaust to keep gaining power the correct way. Upsizing the cold side cover will likely not gain anything at this point.
I'd start with exhaust
Scared of loosing my good spoolup in going to a GT/GTX2860R :(

Decisions. (inb4 "just get a 1.8")
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Old 02-23-2016, 11:59 AM   #24
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Scared of loosing my good spoolup in going to a GT/GTX2860R :(

Decisions. (inb4 "just get a 1.8")
na breh, reread my comment.

What 18 means is, optimize your exhaust mani & full exhaust... Like what I said.

A doughnut vband 2560 + EWG would be purrfect (even if you stick with your 2554)

A GT28, yes you'll loose dat spool. A GTX28 will be 'close' to a 2560 spool but will hit like a hammer later on.
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Old 02-23-2016, 12:01 PM   #25
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Scared of loosing my good spoolup in going to a GT/GTX2860R :(

Decisions. (inb4 "just get a 1.8")
you don't have good spoolup anyway.
and yes, you should definitely go 1.8
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So what you're saying is, my motor is safer than this graph says. Perfect!
I love it when I agree with myself and blindly ignore any conflicting info
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Old 02-23-2016, 12:54 PM   #26
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you don't have good spoolup anyway.
and yes, you should definitely go 1.8
I need to drive one of these "good spooling" cars before I go out and buy a motor, manifold, and the rest of allofit. I just wanna fit in anyways
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Old 02-23-2016, 01:17 PM   #27
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My 1.6L $150 T3 had a better tq curve*. and i didnt have all the extra silly fueling mods to support 500hp with a 250rwhp turbo.

thanks for playing.

you lose.


Just saying. Those silly fuel mods might be good for something.
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Old 02-23-2016, 01:23 PM   #28
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He's saying you don't need all those fueling mods, but if you got em, who cares, it's better to have an overbuilt system anyway

And don't take the criticism too hard, I'm sure your setup is great, and if you like it then that's all that matters.

It looks like a very solid setup
But comments like "better than 1.8" will get trolled
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Old 02-23-2016, 01:26 PM   #29
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He's saying you don't need all those fueling mods, but if you got em, who cares, it's better to have an overbuilt system anyway

And don't take the criticism too hard, I'm sure your setup is great, and if you like it then that's all that matters.

It looks like a very solid setup
But comments like "better than 1.8" will get trolled
Yeah I got it. That's why I love you guys because I can always post something here and get *actual* criticism (and knowledge). I got tired of doing things twice with the fuel system so I wanted to go a little (a lot on the pump) overkill. 750cc doesn't seem too crazy for 250+whp on E85 though does it?
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Old 02-23-2016, 01:49 PM   #30
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i think you missed how jovial my post was, and that i already posted the overlay and said you didnt suck at 1.6L.
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Old 02-23-2016, 01:56 PM   #31
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i think you missed how jovial my post was, and that i already posted the overlay and said you didnt suck at 1.6L.
Maybe I wanted to hear it twice

Side note, on the logs it definitely looks different, my car spools in 4th on the dyno like 3rd or 2nd on the street. Peak boost on the dyno in 4th is at 36-37 where in 4th on the street it's around 30-31.
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Old 02-23-2016, 02:42 PM   #32
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that's because the dynojet aint load bearing
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Old 02-23-2016, 02:49 PM   #33
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Brian chinaturbo, 1.6 and corn.



Taper boost, for 200ft/lbs



Ran out of fuel, need to try again after larger fuel pump.

When I turn it up I imagine I'll have you beat just about everywhere.
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Old 03-15-2016, 11:59 AM   #34
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Brian chinaturbo, 1.6 and corn.



Taper boost, for 200ft/lbs


Ran out of fuel, need to try again after larger fuel pump.

When I turn it up I imagine I'll have you beat just about everywhere.
Since you called me out for not replying to your post, it was because it's a VD. Doing a pull on the road compared to a DynoJet yields significantly faster spool up. I'll turn my boost down to 9.5psi and do a 4th gear VD pull on the street and post it up for comparison.
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Old 03-15-2016, 02:17 PM   #35
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You say t3 doesn't spool, sounds like it's about the same to me. You say you hit full boost at 3200 on the street, I'm at 10 pounds before 3K. This is why I called you out on youtube...



Your budget build would be much easier if you just set a t3 on the taco log. No dumbass shitty adapters held down by swiss cheese home depot bolts to stretch.
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Old 03-15-2016, 04:04 PM   #36
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You say t3 doesn't spool, sounds like it's about the same to me. You say you hit full boost at 3200 on the street, I'm at 10 pounds before 3K. This is why I called you out on youtube...


Your budget build would be much easier if you just set a t3 on the taco log. No dumbass shitty adapters held down by swiss cheese home depot bolts to stretch.
You're acting like I'm building a car for you and charging you for it, chillax. 'Grats on the spool. Tomorrow's video might settle you down a bit.
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Old 03-15-2016, 04:14 PM   #37
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I'm sorry, I had no idea you degraded into youtube hell so fast you no longer cared to convey useful and truthful data. Another haggard garage, wonderbar.


I won't bother any longer. Carry on.
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Old 03-15-2016, 04:19 PM   #38
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Another haggard garage, wonderbar.
Wow.
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Old 03-16-2016, 09:48 AM   #39
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Old 03-16-2016, 09:55 AM   #40
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internetz = srs bidness

here, have a cat
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