New 4th gen PB...
03-28-2011, 03:03 AM
#1
New 4th gen PB...
Went to the track last night. Ran a new PB but still no 14's.
Power mods are: 00vi w/ stock airbox, altima headers, 3" ypipe , 3" test pipe, cattman 3" cat back, and EU. I ran with near full interior (only pulled the spare tire) and a near full tank of gas as to not skew my comparison between y pipe and headers. Sorry about the quality of some pics, its the best I can do until daylight.
Best run with a y pipe, all other mods are the same. 15.11@93.03
Best run with the headers 15.02@91.99 New PB by 3 hundreths lol
Vid of the 15.02 run.
And a couple other decent runs from that night. Timing was jacked up to ~35 degrees, on the same tune it was at a max of 28 degrees. Here is an example of this inconsistency. After making the 15.02 pass I pulled timing in an attempt to get it in check and with that my AFR dropped from a fairly steady 13.0 to mid 12's. Then slowly ramped timing back up to a max of 28 degrees until my laptop battery died.
2.27 60 ft: 15.17@90.07
Overall my launches are improving, I did pull a 2.26 60 ft but I missed 3rd gear. And my other slips with 2.3x 60fts resulted in mid 15 sec passes as I was fooling around with the ignition timing. As far as the 3" y pipe goes, it doesn't look like it is beneficial for a mild 3.0 like mine.
Power mods are: 00vi w/ stock airbox, altima headers, 3" ypipe , 3" test pipe, cattman 3" cat back, and EU. I ran with near full interior (only pulled the spare tire) and a near full tank of gas as to not skew my comparison between y pipe and headers. Sorry about the quality of some pics, its the best I can do until daylight.
Best run with a y pipe, all other mods are the same. 15.11@93.03
Best run with the headers 15.02@91.99 New PB by 3 hundreths lol
Vid of the 15.02 run.
And a couple other decent runs from that night. Timing was jacked up to ~35 degrees, on the same tune it was at a max of 28 degrees. Here is an example of this inconsistency. After making the 15.02 pass I pulled timing in an attempt to get it in check and with that my AFR dropped from a fairly steady 13.0 to mid 12's. Then slowly ramped timing back up to a max of 28 degrees until my laptop battery died.
2.27 60 ft: 15.17@90.07
Overall my launches are improving, I did pull a 2.26 60 ft but I missed 3rd gear. And my other slips with 2.3x 60fts resulted in mid 15 sec passes as I was fooling around with the ignition timing. As far as the 3" y pipe goes, it doesn't look like it is beneficial for a mild 3.0 like mine.
03-28-2011, 07:33 AM
#4
I can't wait much longer, I ordered my KS, as soon as it gets here I'm taking mine to the track. I can't have you beating me w/ two different setups now 
Was that the same auto 5.5 from your previous vids?
Was that the same auto 5.5 from your previous vids?
Last edited by aackshun; 03-28-2011 at 07:40 AM.
03-28-2011, 08:24 AM
#5
Something is not adding up. What was the weather like? Are you running at a high altitude? Have you checked your codes to make sure you do not have a knock sensor code? Are you sure your VI is working? Your launches are not good, but looking at your trap that is not your biggest problem. You should easily be over 95 mph unless you are racing in the clouds. When I had my 95 m/t, I had an 00VI, y pipe and 2.5" exhaust +jwt ecu and I was trapping between 99-100mph. If you can find your power you can still run low mid to low 14's even with that 60'.
03-28-2011, 11:03 AM
#6
I see he's racing at Speedworld Dragstrip outside Glendale, AZ. That's a high elevation track at about 1500'. His DA that night was about 2500'. If he races at a sea level with the exact same ambient temperature, he'll run at least 4 tenths faster. So right now, he definitely is running at least 14.6s in decent mid 60s weather at a track closer to sea level. That's considering his DA goes from 2500' to 500'. If he waits for an awesome night with cold weather, he's capable of running a 14.3. And if he drops his 60' to a 2.1, a 14.0 or 14.1 is very likely.
It sounds like his Maxima is running pretty solid.
It sounds like his Maxima is running pretty solid.
03-28-2011, 11:21 AM
#7
I believe it is, though I will double check.
Yep, he switched from an injen to a short ram and went as light as reasonably possible.
Track elevation is 1470 above sea level. Density altitude ranged from 2639 on the 15.02 run and dropped to 2300-2200 shortly after and stayed there for the rest of the night. Only code I have is for the maf because it popped out of the midpipe halfway down the track. Ignition timing also 15 degrees at idle, so I believe that my knock sensor is fine. I will double check the vi.
Something is not adding up. What was the weather like? Are you running at a high altitude? Have you checked your codes to make sure you do not have a knock sensor code? Are you sure your VI is working? Your launches are not good, but looking at your trap that is not your biggest problem. You should easily be over 95 mph unless you are racing in the clouds. When I had my 95 m/t, I had an 00VI, y pipe and 2.5" exhaust +jwt ecu and I was trapping between 99-100mph. If you can find your power you can still run low mid to low 14's even with that 60'.
03-28-2011, 11:30 AM
#8
I see he's racing at Speedworld Dragstrip outside Glendale, AZ. That's a high elevation track at about 1500'. His DA that night was about 2500'. If he races at a sea level with the exact same ambient temperature, he'll run at least 4 tenths faster. So right now, he definitely is running at least 14.6s in decent mid 60s weather at a track closer to sea level. That's considering his DA goes from 2500' to 500'. If he waits for an awesome night with cold weather, he's capable of running a 14.3. And if he drops his 60' to a 2.1, a 14.0 or 14.1 is very likely.
It sounds like his Maxima is running pretty solid.
It sounds like his Maxima is running pretty solid.
03-29-2011, 04:36 PM
#9
curious if you have any before and after 3" exhaust dyno sheet ?
the bottom ends looks pretty bad ... your coming back nice from the 1/8 to a 1/4 but from the hole to the 1/8 you trap is very low ...
your losing alot torque IMO
the bottom ends looks pretty bad ... your coming back nice from the 1/8 to a 1/4 but from the hole to the 1/8 you trap is very low ...
your losing alot torque IMO
03-29-2011, 05:11 PM
#10
03-29-2011, 07:20 PM
#12
I still think you should get the car on a dyno.
I disagree with aaron, 2500' DA with your mods should still result in much higher traps. The launches aren't great but are pretty average, definitely not bad enough to be having a negative effect on the trap speed. I think it's low for a reason, and I don't believe it's the DA. 90-93mph traps are not to be expected with your mods @ 2000-2500' DAs.
I disagree with aaron, 2500' DA with your mods should still result in much higher traps. The launches aren't great but are pretty average, definitely not bad enough to be having a negative effect on the trap speed. I think it's low for a reason, and I don't believe it's the DA. 90-93mph traps are not to be expected with your mods @ 2000-2500' DAs.
03-30-2011, 10:19 AM
#14
I still think you should get the car on a dyno.
I disagree with aaron, 2500' DA with your mods should still result in much higher traps. The launches aren't great but are pretty average, definitely not bad enough to be having a negative effect on the trap speed. I think it's low for a reason, and I don't believe it's the DA. 90-93mph traps are not to be expected with your mods @ 2000-2500' DAs.
I disagree with aaron, 2500' DA with your mods should still result in much higher traps. The launches aren't great but are pretty average, definitely not bad enough to be having a negative effect on the trap speed. I think it's low for a reason, and I don't believe it's the DA. 90-93mph traps are not to be expected with your mods @ 2000-2500' DAs.
this
03-31-2011, 12:33 PM
#15
I've been keeping an eye out for a dyno day. The last one fell though and wound up being full price.
I suppose the only logical answer is that my motor isn't in the best of shape.
I suppose the only logical answer is that my motor isn't in the best of shape.
Last edited by schmellyfart; 03-31-2011 at 12:36 PM.
03-31-2011, 03:12 PM
#17
04-02-2011, 07:28 AM
#19
04-02-2011, 01:09 PM
#20
Compression test is on the to do list. Oh my, I did that when I was messing with the Z32 maf. On the stock maf and no tune whatsoever, it was noticeably slower and my afr was a flat 10.0 cause the wideband wouldn't read any lower.
On another note, my engine is making some sort of ticking/rattling noise on the passenger side..I'll see if I can get a video of it. I suspect its related to the maf popping out of the midpipe halfway down the track and timing spiking into the 40 degree area.
On another note, my engine is making some sort of ticking/rattling noise on the passenger side..I'll see if I can get a video of it. I suspect its related to the maf popping out of the midpipe halfway down the track and timing spiking into the 40 degree area.
Last edited by schmellyfart; 04-02-2011 at 03:24 PM.
04-03-2011, 12:50 AM
#21
Use your stock maf too, you haven't maxed it out, we need to get rid of a lot of these x-factors by slowly stepping back on mods until you find out what's making your car perform like this.
That's the timing chain area... Check your oil level, what's the weather like over there? is it cold?
That's the timing chain area... Check your oil level, what's the weather like over there? is it cold?
04-03-2011, 02:17 AM
#22
I've been using the stock maf. I only went on a short drive to test it out then put the stock maf back in.
First thing i did was check the oil level. It was low, I added oil on Thursday and it didn't help. As for the weather:
First thing i did was check the oil level. It was low, I added oil on Thursday and it didn't help. As for the weather:
04-18-2011, 11:01 AM
#23
VIAS is functional.
I also decided to check the DA correction from the 15.11 run with a y pipe.
And the DA correction from the 15.02 run with headers.
I don't want to read too much into corrected times, but it is relieving knowing I improved on decent weather times in not so good weather.
I also decided to check the DA correction from the 15.11 run with a y pipe.
And the DA correction from the 15.02 run with headers.
I don't want to read too much into corrected times, but it is relieving knowing I improved on decent weather times in not so good weather.
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