surok
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/20 22:06:22
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thats intense, thats great that its making that much boost at only 3500. how much power is it making at 3500?
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mister_two
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 17:53:21
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Congratulations Pat. It must be very fun to drive especially with all that usable power so early in the rev range.
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robk
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 18:13:20
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Do you have the latest dyno graphs by any chance?
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kameleon
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 19:06:25
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stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 19:41:56
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thanks for the comments, its all been worth the hassle. when the tuner backed off the throttle after it made the power, there was a massive flame out the exhaust, awesome!!
its really a hoot to drive, shame its been wet these past few days and my rear tyres are not the best.
surok - it makes around the same as your car at 3,500 RPM, around 110 rwkw
robk - I'll post up the graph next week.
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robk
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 20:24:06
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I would love to see dyno graphs from a stock NA MR2, a stock turbo MR2, and a highly modified MR2 such as Stuka's, all on top of each other for comparison! I found the original dyno graph from when my car was stock, so I might put that up in my thread later.
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kameleon
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 21:50:59
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surok - it makes around the same as your car at 3,500 RPM, around 110 rwkw
lol.......
"I would love to see dyno graphs from a stock NA MR2, a stock turbo MR2, and a highly modified MR2 such as Stuka's, all on top of each other for comparison! I found the original dyno graph from when my car was stock, so I might put that up in my thread later."
there is a thread on dyno graphs in the "general" section
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surok
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/21 22:21:57
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wait...18psi to make 110 kw?
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robk
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 00:17:23
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quote:
Originally posted by surok
wait...18psi to make 110 kw?
It would probably be more useful to compare the torque figures at 3500 RPM, rather than the power figures. Torque always increases then drops again, but power keeps increasing. I wish torque figures were better publicized, more so than power, because torque is more important in most cases where you aren't revving out the engine. Also keep in mind that lots of boost requires the ignition timing to be retarded quite substantially (to avoid knocking etc) which counteracts part of the benefits of the boost.
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artymr2
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 00:29:28
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But if you know the power and revs, the torque is directly related.
ie if car A is making 100kw at 2000rpm, and car B is making 110kw at 2000 rpm, then car B has 10% more torque at that rpm.
Its a shame a lot of dyno runs dont put the speed/rpm factor in so that the plot is against rpm, not speed. would make them easier to compare etc.
But i think i know what you mean, you really should compare power plots on the same axis and look at the area under the curve, and not just peak power, as this is a better indication of usable power, ie dont have to rev the ^%$# out of it to get decent performance.
It would be interesting to compare a stock/mildly boosted plot to a larger turbo replacement plot, and see how the low end of the rev range compares. Sometimes the massive gain in top end might make the bottom end feel weak even though it might be better than before, purely due to the now larger difference in power at the top end, if that makes sense.
Cheers
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robk
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 00:44:54
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quote:
Originally posted by artymr2
But if you know the power and revs, the torque is directly related.
ie if car A is making 100kw at 2000rpm, and car B is making 110kw at 2000 rpm, then car B has 10% more torque at that rpm.
Yes you can determine the torque from the power, but torque is still very meaningful on it's own, and people rarely bother to do the maths to convert a power curve into a torque curve, so the peak power figure ends up being the one thing that people care about. quote:
Originally posted by artymr2
But i think i know what you mean, you really should compare power plots on the same axis and look at the area under the curve, and not just peak power, as this is a better indication of usable power, ie dont have to rev the ^%$# out of it to get decent performance.
It would be interesting to compare a stock/mildly boosted plot to a larger turbo replacement plot, and see how the low end of the rev range compares. Sometimes the massive gain in top end might make the bottom end feel weak even though it might be better than before, purely due to the now larger difference in power at the top end, if that makes sense.
Cheers
+1 to all of the above!
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artymr2
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 00:58:55
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Yep, and the other thing that translates to real world performance but a dyno plot at full throttle cant tell you is the engines response.
ie in day to day driving, a responsive engine is ahead in real world performance to a non responsive one. in situations like prodding the throttle quickly to get into a gap in the traffic etc. comparing say an aurion to a wrx, the aurion wins hands down. by the time the wrx has picked itself up, the aurion is already in the gap. this is from experience driving both cars, and the wrx isn't really that laggy, but the difference in such situations is obvious and quite substantial.
trd aurion engine with 6 speed manual in an sw20 would be nice!!
cheers
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kameleon
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 08:42:02
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thing with this engine is its using a turbo thats considered small/mid range on a 2l, yet its on a 2.2l with a far better ve than standard.
i think Jays 3071 was making 270ish on his 2.2l back in the day????
regardless it must be a damn punchy setup.
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matt234
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 09:31:34
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quote:
Originally posted by artymr2
Yep, and the other thing that translates to real world performance but a dyno plot at full throttle cant tell you is the engines response.
ie in day to day driving, a responsive engine is ahead in real world performance to a non responsive one. in situations like prodding the throttle quickly to get into a gap in the traffic etc. comparing say an aurion to a wrx, the aurion wins hands down. by the time the wrx has picked itself up, the aurion is already in the gap. this is from experience driving both cars, and the wrx isn't really that laggy, but the difference in such situations is obvious and quite substantial.
trd aurion engine with 6 speed manual in an sw20 would be nice!!
cheers
From all reports the standard aurion engine in an sw20 is pretty awesome. I'll let you know soon. If it feels slow i'll have to supercharge it.
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artymr2
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 13:03:32
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quote:
Originally posted by matt234
From all reports the standard aurion engine in an sw20 is pretty awesome. I'll let you know soon. If it feels slow i'll have to supercharge it.
Agree, i think it would be more than ample for some great fun. Its very snappy in an auto aurion weighing heaps more, so with manual and much less weight in the MR2 the response must be amazing. And it will have the traction to use it. Went a bit off topic previously, but awesome result stuka!! Cheers
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