Sonofthehill's stock engine 240k mile 99 MKTURBO 12 seconds on all seasons thread - Page 2 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 01-14-2016, 02:56 AM   #21
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Yeah, I hear the efr's make the same with half the boost.
Thanks for the advice, maybe I will dial it back a bit. I have a low mileage crank but I need a block. Then I could build a better bottom end.
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Old 01-14-2016, 03:08 AM   #22
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I'm pretty concerned about my 5 speed too, keeping an eye out for a spare.
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Old 01-14-2016, 02:30 PM   #23
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I'm really impressed with the setup. Seems like MK Turbo absolutely nailed the combination of power, spool, and budget for a simple stock motor setup. It makes me want to buy a NB to daily drive.
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Old 01-14-2016, 03:55 PM   #24
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Quote:
Originally Posted by pdexta View Post
I'm really impressed with the setup. Seems like MK Turbo absolutely nailed the combination of power, spool, and budget for a simple stock motor setup. It makes me want to buy a NB to daily drive.
That was my overall goal, I wanted to make a modern day Greddy setup with what I have learned over the past 10 years.
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Old 01-14-2016, 04:17 PM   #25
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It's different with chinachargers, efficiency and all that, but still: 15psi is 15psi and those rods are likely not very happy with you right now lol

be gentle with her. my 00 bent rods at 13psi and 240hp (dont remember tq, likely 220)
This is why I'm building an engine, even with the limitations of MK Turbo. I'd prefer to have something reliable-ish at 250 HP. Not sure whether I'll get the turbo parts or the engine built first, but I won't be turning up the boost until I get the built engine in there.
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Old 01-14-2016, 04:42 PM   #26
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It didn't spool as fast on the dyno, probably cause it doesn't account for my fat *** or all the heavy *** stock components still attached to my car. At least that would be my guess.
So this got me thinking a little bit. I wonder if it is partly due to reduced back pressure in the exhaust (low pressure region behind car sucking out exhaust). Might have lower intake temps too.
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Old 01-14-2016, 06:18 PM   #27
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low back pressure only improves spool
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Old 01-14-2016, 06:29 PM   #28
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That's what I just said.
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Old 01-16-2016, 05:58 PM   #29
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I am definitely not at the limit of the kit. If I had not been careful with my ebc or failed to set my boost limiter up, I could have easily grenaded my motor.
It seems like load is a major factor in spool, the lack of low pressure in the rear may be a factor too but I don't know. My intake temps were pretty high but I don't usually run 4th all the way to the top either. They had a pretty nice belt driven blower fan though.
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Old 03-17-2016, 12:06 AM   #30
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Nice day at the drag race in Sonoma. Couldn't get under 14 seconds but I did break into triple digit trap speed, which is what I was after. My tune needs some work after changing my injector dead times, so maybe better next time.



Beat that Z, only ran a 15.2.





I am car 98, left is against a honda civic that was fast as ****. Right is against an new SS Camaro.
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Sonofthehill's stock engine 240k mile 99 MKTURBO 12 seconds on all seasons thread-80-img_20160316_164327870_819ad133d5bec8e7fcdc3e27e7c210b8b4760347.jpg   Sonofthehill's stock engine 240k mile 99 MKTURBO 12 seconds on all seasons thread-80-img_20160316_194828183_hdr_69382f15a27738f120740a9269d7cf4138be0c24.jpg  
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Old 04-13-2016, 11:46 PM   #31
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Hit the drag with the new lazy snail turbo, it doesn't give anything up to the smaller compressor on the 1/4 mile.
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Old 04-14-2016, 07:45 AM   #32
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You've got a rather significant improvement in 60's that seems to have helped you sneak into the 13's. Did you change your tires? Launch technique? Or is the lazy spool helping control off the line wheelspin? Well done sir your making progress either way.
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Old 04-14-2016, 10:13 AM   #33
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I'm thinking it's the latter.

congrats man
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Old 04-14-2016, 01:41 PM   #34
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It must be the lazy spool, or perhaps I was lining my tires up in the groove better. My best time seemed like my crappiest launch. There were WRX guys who asked the people ahead of me and moved a car so they could video me blast past them. That was my 13.7 second run, I am pretty gentle launching my 5 speed typically. I played with my VE table and closed loop EBC each time, which was really the point of going.
It's pretty well dialed in now and I am ready to do a dyno for Lars.

Thanks guys!
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Old 05-11-2016, 11:37 PM   #35
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New best time, this is on CA 91 crap gas. This is slightly more boost than I will run on the dyno next Tuesday.
I ran under 13.5 with no roll bar but no one said anything. I had to leave before elimination though so I doubt they would let me run with 13.45 on my window.
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Old 05-12-2016, 12:31 AM   #36
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good job man. you beat my MSM time despite having much less trap speed
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Old 05-12-2016, 01:39 AM   #37
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Thanks man! Couldn't have done it without reading your threads and at least a dozen other folks threads on here.
The car is very fun, I am a happy camper.
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Old 05-12-2016, 02:54 PM   #38
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Is this still 15 psi? Man. 13.45 is quick.
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Old 05-12-2016, 03:20 PM   #39
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Here is the log. I fixed the knock, retarded 1/2 degree in that area and I see the lean spikes just after the lean afr targets so I don't think it's my AE. I just need to tune my 5500 rpm cruise cells IMHO. I have also been fudging with the boost targets at the drag because I have my EBC set to mimic my last dyno for next week.

Tapers up to 15.75 or so.
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Old 05-17-2016, 02:37 PM   #40
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You guys aren't going to like this. The dyno folks swore that with the new software they can only plot rpm with the AFR.
I will play with the images after work and try to extrapolate an RPM axis on top.
Left; small turbo blue, big turbo red.<br/>Right; big turbo wastegate red, EBC blue.<br ><br >
Peak EBC torque was at 4300, peak HP at 6200.
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