Normal spool for a 1.6?
2 Attachment(s)
I've recently had my newly turboed miata tuned, it's a 1.6 with a top mount kraken manifold, 3" dp and a Garrett 2560r. I still have a few issues with the tune, but the tuner didn't have very long and just kinda fitted me in where he could. So it's fine and driveable but I wanted to get some opinion on my spoolup. I know it's a bigger turbo on a little engine, but looking at the sticky it looks like my spool might be a bit on the slow side.
4th gear pull: 2200: 0.0 2300: 2.1 2500: 3.4 2700: 5.1 2900: 5.8 3100: 6.7 3300: 7.3 3500: 7.9 3800: 8.5 4000: 8.8 4200: 8.9 I had to let off the gas at that point, in 3rd it reaches full boost around 11psi at 5440rpm. That's not to say is isn't a blast to drive, I'm just curious as to whether this is a normal spool up with my setup or whether it could be better? I've uploaded the log, I'm new to this so if I'm not logging correctly please let me know. I've attached the current tune too. Anyway, thanks for any thoughts and expertise, this is all new to me and don't know whether I'm looking for problems where there aren't any! :) https://cimg0.ibsrv.net/gimg/www.mia...a25effa22c.jpg |
Are you running stock wastegate canister? No boost controller?
Stock is a 7psi canister, which you hit at 3200rpm, rest is boost creep, 11psi at 5400rpm is creep, not spool |
Originally Posted by borka
(Post 1571244)
Are you running stock wastegate canister? No boost controller?
Stock is a 7psi canister, which you hit at 3200rpm, rest is boost creep, 11psi at 5400rpm is creep, not spool |
11psi at 5400 is super slow boost.
Either your ebc setting are messed up or you have a boost leak |
Looks about right to me. Find an equivalent 1.8 setup and multiply the spooled rpm by 1.8/1.6 as a sanity check.
Plus there should be lots of gt2560 1.6 dynos out there. |
That's pretty lousy spool and overall output.
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Originally Posted by sixshooter
(Post 1571252)
That's pretty lousy spool and overall output.
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Check for boost leaks, see what messing with EBC gets you as long as you have faith you aren't going to ping to pieces.
And then actually rev it to a normal rev limit. 6200rpm is a great way to make a small motor feel even worse. |
Originally Posted by concealer404
(Post 1571255)
Check for boost leaks, see what messing with EBC gets you as long as you have faith you aren't going to ping to pieces.
And then actually rev it to a normal rev limit. 6200rpm is a great way to make a small motor feel even worse. |
Originally Posted by sixshooter
(Post 1571252)
That's pretty lousy spool and overall output.
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I'd be interested to see what spool looks like in open loop. I feel like your bias table is a little on the conservative side. Was open loop tuned before closed loop was activated?
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Originally Posted by curly
(Post 1571261)
I'd be interested to see what spool looks like in open loop. I feel like your bias table is a little on the conservative side. Was open loop tuned before closed loop was activated?
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Originally Posted by borka
(Post 1571260)
i would not call 226hp and 200tq on a 1.6L at 11 psi lousy output. sounds about right to me.
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Originally Posted by borka
(Post 1571260)
i would not call 226hp and 200tq on a 1.6L at 11 psi lousy output. sounds about right to me.
It's only fun between 5500 and 6500, lol. |
Originally Posted by sixshooter
(Post 1571294)
I guess you are right that 226 at 11psi is expected. The area under the torque curve looks as miserable as an underspun rotrex, though. I'm trying to identify how much of the problem is 1.6 and how much is something else.
It's only fun between 5500 and 6500, lol. Ok, so is that indicative of just a larger turbo on a little engine, or is it in the tune (or a leak?). I'm new to all this so not sure how to figure this out. |
That looks really slow. It took me months to chase out all the boost leaks. Wastegate preload also has a pretty dramatic effect. For reference here is a plot of spool on my 1.6L with the T3/T4 churbo from the MKTurbo kit. One of my boost leaks was through the cheap BOV, so moving to a real GReddy made a big difference. At 13psi I was making 205 whp on a Mustang dyno.
https://cimg0.ibsrv.net/gimg/www.mia...8803820918.png |
Originally Posted by Schroedinger
(Post 1571300)
That looks really slow. It took me months to chase out all the boost leaks. Wastegate preload also has a pretty dramatic effect. For reference here is a plot of spool on my 1.6L with the T3/T4 churbo from the MKTurbo kit. One of my boost leaks was through the cheap BOV, so moving to a real GReddy made a big difference. At 13psi I was making 205 whp on a Mustang dyno.
https://cimg0.ibsrv.net/gimg/www.mia...8803820918.png I have noticed that my pod gauge only ever reads up to 0psi, never actually shows positive boost, whilst the MS as you can see does. I ran a line to MS and tee'd off of that to the boost gauge, so I would have thought they would show the same thing, but I guess something is screwed up there. |
Originally Posted by Schroedinger
(Post 1571300)
That looks really slow. It took me months to chase out all the boost leaks. Wastegate preload also has a pretty dramatic effect. For reference here is a plot of spool on my 1.6L with the T3/T4 churbo from the MKTurbo kit. One of my boost leaks was through the cheap BOV, so moving to a real GReddy made a big difference. At 13psi I was making 205 whp on a Mustang dyno.
https://cimg0.ibsrv.net/gimg/www.mia...8803820918.png |
Originally Posted by sixshooter
(Post 1571357)
That's a proper chart shape for a turbo 1.6
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