1/4 mile predictions for G37 Coupe?
05-30-2007, 10:50 PM
#46
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Yeh s2000 is lacking the torque no matter what RPM you are at. 
Originally Posted by muscarel
Assuming traction is no issue, I'm pretty sure all cars would run a faster time at higher rpms (higher horsepower).
I like looking at 5-60 times as well. I think they are a good gauge of what you experience on the street. High powered AWD cars sometimes have very low ET's but crappy 5-60 times. Obviously, the car runs what the car runs - but for street performance I'd rather have a car with a high flat torque curve than a one with a similar curve to an s2000.
That being said, I think the G37 (similar to the HR sedan) will have the best of both worlds. Good low end torque (relative) while also spinning to 7500 rpm.
I like looking at 5-60 times as well. I think they are a good gauge of what you experience on the street. High powered AWD cars sometimes have very low ET's but crappy 5-60 times. Obviously, the car runs what the car runs - but for street performance I'd rather have a car with a high flat torque curve than a one with a similar curve to an s2000.
That being said, I think the G37 (similar to the HR sedan) will have the best of both worlds. Good low end torque (relative) while also spinning to 7500 rpm.
05-31-2007, 04:22 AM
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Originally Posted by muscarel
I agree with all of your statements.....but I did a little spreadsheet to see how long the G's advantage lasts (higher rpm HP), and it still looks like the 335 will have the advantage overall. The G37 doesn't really make more power until 6,000 rpm. So, in 1st gear the G's advantage is only for the last 8 mph or so. It gets better as you shift through the gears, but the 335 is still making more power most of the time. Remember, even though torque drops off in higher rpms on the 335, it also starts off with more, so that takes "some" of the bite away when comparing to the G37.
05-31-2007, 08:12 AM
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Originally Posted by muscarel
I agree with all of your statements.....but I did a little spreadsheet to see how long the G's advantage lasts (higher rpm HP), and it still looks like the 335 will have the advantage overall. The G37 doesn't really make more power until 6,000 rpm. So, in 1st gear the G's advantage is only for the last 8 mph or so. It gets better as you shift through the gears, but the 335 is still making more power most of the time. Remember, even though torque drops off in higher rpms on the 335, it also starts off with more, so that takes "some" of the bite away when comparing to the G37.
05-31-2007, 09:54 AM
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The 2.2 AP2 had a slight bump in TQ. 153 to 162 
Originally Posted by jnmunsey
Well it is 2.0L 4 cylinder engine...well the good one is anyway.
Last edited by G37Knight; 05-31-2007 at 09:57 AM.
05-31-2007, 10:18 AM
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I'm with Trey. We think alike and I agree that mid 13s (~13.5@103mph) should be the typical "good" times for the G37. The average mag and average driver times will probably be in the 13.6-13.8@102-103mph range. Then there will be those that run at better tracks under exceptional conditions which may post 13.3-13.4s@104mph+. With slicks, good conditions, and decent skill, the 6MT should have no problem running 13.1-13.2@104mph STOCK assuming the owner is willing to pucker up and rev to 5000-6000rpms and come close to a clutch dump launch.
05-31-2007, 07:37 PM
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Not sure how you come to that conclusion Dave. The 07Z typically runs those times, yet has less aggressive gear ratios and slightly worse powerband.
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
05-31-2007, 09:06 PM
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Originally Posted by Hypnoz
Not sure how you come to that conclusion Dave. The 07Z typically runs those times, yet has less aggressive gear ratios and slightly worse powerband.
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
For example, if you look at the top25 list on my350z, you will find two z's in the top10 that are only trapping 103mph. One is an auto, and the other is a six speed. They have nearly identical launches, and traps. The auto was on street tires, while the 6mt was on DR's. The auto's launch was marginally worse, as was his trap, but his ET was almost 2 tenths faster than the guy in the 6 speed.
What makes this comparison even more interesting is the fact that that particular auto even has a 3.5FD swap, so the final drives are the same. That just means that each of the gears in the auto is longer than in the 6 speed counter part.
Go look at that list again and let it sink in. Notice anything about the ET's versus the trap speeds? Those two guys with the 103mph traps had ET's of 13.3 and 13.1.
My last trip to the track netted me a 13.622@103.63 with a 2.082 sixty foot. Take one and a half tenths off my sixty foot, and it would be close to these two guys. But that would put my ET as a low 13.4. I'm trapping higher than both those guys, and even if I could launch like them, I wouldn't be able to match their ET's. And it's certainly not shifting.
So don't get so hung up on the coupe besting the 07z's.
05-31-2007, 10:21 PM
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Originally Posted by Hypnoz
Not sure how you come to that conclusion Dave. The 07Z typically runs those times, yet has less aggressive gear ratios and slightly worse powerband.
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
Why would the 7 need a 6K drop to make an optimal launch?
05-31-2007, 10:43 PM
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Originally Posted by Hypnoz
Not sure how you come to that conclusion Dave. The 07Z typically runs those times, yet has less aggressive gear ratios and slightly worse powerband.
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
12s no doubt with slicks and a 5k-6k drop.
I expect stock trap speeds 104+
A 1.8 sixty foot will not be enough to put the g37 in the twelves, even with a 104mph trap.
