11.48 at 122 from the fast son of a..........hill
#41
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A better pic of the small and large turbo comparison.
Small turbo(blue) made 218 ft/lbs at 3400 and 230 HP at 6200.
Larger turbo(red) made 212 ft/lbs at 4300 and 238 HP at 6200.
I suspect that I was a couple kpa higher with the larger turbo but I need to check my log to be sure.<br >
Small turbo(blue) made 218 ft/lbs at 3400 and 230 HP at 6200.
Larger turbo(red) made 212 ft/lbs at 4300 and 238 HP at 6200.
I suspect that I was a couple kpa higher with the larger turbo but I need to check my log to be sure.<br >
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I don't think their wideband works too well at higher afr's as I was hitting my target fairly well. I must admit I don't tune for 11.8 right at 100kpa, closer to 12.8 tapering to 11.8 as I approach 140 kpa or so, trying to have decent mileage.
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I am curious how the larger turbo would do if you cranked up the boost to closer to 20psi. Not suggesting you do it on a stock motor, but that could possibly be where it hits its efficiency point and start making better power.
#48
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I will say this, I had it tapering up to about 16.5 psi or so at the drag. I got a terrible time and thought I broke something in my driveline, turned out I was spinning my tires in 2nd and 3rd.
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It was about 10 degrees warmer this morning but I had a few extra kpa too. Basically they perform the same above 4300 rpm in the 15 psi range but the smaller one reaches 15 psi much sooner.
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At one point the dyno operator looked at the odometer and asked if there was really 237,000 miles on my car. I said, "yeah, and this is the original motor!" The look on his face was priceless.
#52
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Yeah buddy
102, 103, 104... It was pretty hot today, on crap CA 91 gas as usual.
13 second Miatas definitely get noticed around here, they gave me a hard time about running under 13.5 last time but said if I bolted my hardtop back on it would be considered a hardtop, not a convertible. I just mellowed my launch a bit for now.
The last time slip was against one of the 2015 mustang gt's, but I think it was on all season tires like me. It didn't seem to be set up nearly as well as Vlad's car. I actually almost beat him and was quicker to 330', it was a great race, neck and neck the whole time.
102, 103, 104... It was pretty hot today, on crap CA 91 gas as usual.
13 second Miatas definitely get noticed around here, they gave me a hard time about running under 13.5 last time but said if I bolted my hardtop back on it would be considered a hardtop, not a convertible. I just mellowed my launch a bit for now.
The last time slip was against one of the 2015 mustang gt's, but I think it was on all season tires like me. It didn't seem to be set up nearly as well as Vlad's car. I actually almost beat him and was quicker to 330', it was a great race, neck and neck the whole time.
#54
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Thanks man! Couldn't have done it this reliably without everyone's input.
I think most of the improvement is from shifting at the right point.
Also helps when you have a badass mustang next to you that you somehow managed to get ahead of in the first couple hundred feet.
I think most of the improvement is from shifting at the right point.
Also helps when you have a badass mustang next to you that you somehow managed to get ahead of in the first couple hundred feet.