1/4 Mile Run at Bandimere (Colorado)
08-19-2011, 07:12 PM
#48
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agreed...basically nitrous is an oxidizer and therefore chemically introduces more oxygen to the combustion chamber. Interesting to note that n2o is NOT flammable! However when compressed..simply stated BANG more oxygen.
Thinking of our engines as air pumps really the fuel and spark is only there to ignite the combustion..more air, more power
Even with nitrous artificially creating more oxygen your still not drawing in as much because you started with less.
Geez I sound simple compared to many of the people on here who build brains as a hobby!
Thinking of our engines as air pumps really the fuel and spark is only there to ignite the combustion..more air, more power
Even with nitrous artificially creating more oxygen your still not drawing in as much because you started with less.
Geez I sound simple compared to many of the people on here who build brains as a hobby!
With nitrous it is not as bad. Ultimately, the strength of components is more of a factor. Nitrous is not as efficient so more needs to be used to get the same power as you would at lower elevations. This brings the engine that much closer to destruction.
For example; take a 2.5 Na and run it up here it will probably run an 18 second quarter. Now add a 50 shot and you may break 16's. At sea level, the same car would run 17's and a 50shot would put it in the high 15's most likely. Now take the same car and add a 200 shot up here and most likely you'd be lucky to run 15's and would probably blow it up. At sea level you could up the nitrous slightly 100 shot and most likely run 14's or there abouts. 200 hp would probably still kill it. The point is, you would just need too much to make it work up here and would blow it up.
When I raced my nova up here I had to run quite a bit more and it was always on the edge. It ran mid to high 8's up here, I ran much less in phoenix and it ran mid to low 8's with ease. NA, was even better, due to the cars build. It ran low to mid tens up here and low 9's with ease in az.
For example; take a 2.5 Na and run it up here it will probably run an 18 second quarter. Now add a 50 shot and you may break 16's. At sea level, the same car would run 17's and a 50shot would put it in the high 15's most likely. Now take the same car and add a 200 shot up here and most likely you'd be lucky to run 15's and would probably blow it up. At sea level you could up the nitrous slightly 100 shot and most likely run 14's or there abouts. 200 hp would probably still kill it. The point is, you would just need too much to make it work up here and would blow it up.
When I raced my nova up here I had to run quite a bit more and it was always on the edge. It ran mid to high 8's up here, I ran much less in phoenix and it ran mid to low 8's with ease. NA, was even better, due to the cars build. It ran low to mid tens up here and low 9's with ease in az.
08-19-2011, 09:03 PM
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Thanks for posting guys. Looks promising. It's a shame we have to go light with our cars off the line. Maybe we get over protective. Although Sid got off nicely. Josh, what do you think are the downsides of running the 2-step / flat shift?
ps, note Wayne Gill's R/T @. 001!! I'd say he's more of a clairvoyant than a driver, lol.
ps, note Wayne Gill's R/T @. 001!! I'd say he's more of a clairvoyant than a driver, lol.
I've always had to baby mine out of the hole, already snapped enough CV's.
Ended mostly in ~ 13.5's @ 117 with a 2.5-2.6 60 ft.
08-19-2011, 09:15 PM
#51
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Pretty sure most of the broken CVs are from the transmission moving laterally, and shock-loading...
Last edited by Rogue_Ant; 08-19-2011 at 09:39 PM.
08-19-2011, 09:21 PM
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I only run 255 series yokohama ad07s and they actually hook pretty decent once I'm in second gear, but by no means provide enough grip that they should be breaking the cv's. One time I clutch kicked the car at the track on the original CV's and it snapped instantly. Definitely my own fault, but that was my first time with this car. My other cars have always spooled very quickly or have been all motor.
Unfortunately though, I have a long spool time like most 951's, made worse by the t04e not being ball bearing and the car is not tuned properly.
Timing is still controlled by a LR after market chip and the mafterburner controls the afr.
It's no drag car as it sits, but it really scoots from a roll when I can brake boost.
I've already bought the ostrich tuner and socket booster from your write up, so some day I'll actually tune the car right.
I still can't believe you guys are running so close to 12's at such high altitude though, really amazing actually.
08-19-2011, 09:35 PM
#53
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Drew - 117mph is moving! These cars aren't drag cars, but it is still fun 
What T04E are you using? What boost?
Yeah, 12s are the goal next time. With my new turbo I think it will be very doable.
Let me know when you start to tune, or if you have any questions using Tunerpro and the Ostrich.
What T04E are you using? What boost?
Yeah, 12s are the goal next time. With my new turbo I think it will be very doable.
Let me know when you start to tune, or if you have any questions using Tunerpro and the Ostrich.
08-20-2011, 12:27 AM
#54
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Yep, the times they broke were when I was being stupid.
I only run 255 series yokohama ad07s and they actually hook pretty decent once I'm in second gear, but by no means provide enough grip that they should be breaking the cv's. One time I clutch kicked the car at the track on the original CV's and it snapped instantly. Definitely my own fault, but that was my first time with this car. My other cars have always spooled very quickly or have been all motor.
Unfortunately though, I have a long spool time like most 951's, made worse by the t04e not being ball bearing and the car is not tuned properly.
Timing is still controlled by a LR after market chip and the mafterburner controls the afr.
It's no drag car as it sits, but it really scoots from a roll when I can brake boost.
I've already bought the ostrich tuner and socket booster from your write up, so some day I'll actually tune the car right.
I still can't believe you guys are running so close to 12's at such high altitude though, really amazing actually.
I only run 255 series yokohama ad07s and they actually hook pretty decent once I'm in second gear, but by no means provide enough grip that they should be breaking the cv's. One time I clutch kicked the car at the track on the original CV's and it snapped instantly. Definitely my own fault, but that was my first time with this car. My other cars have always spooled very quickly or have been all motor.
Unfortunately though, I have a long spool time like most 951's, made worse by the t04e not being ball bearing and the car is not tuned properly.
Timing is still controlled by a LR after market chip and the mafterburner controls the afr.
It's no drag car as it sits, but it really scoots from a roll when I can brake boost.
I've already bought the ostrich tuner and socket booster from your write up, so some day I'll actually tune the car right.
I still can't believe you guys are running so close to 12's at such high altitude though, really amazing actually.
I'm still jealous.
08-22-2011, 02:06 AM
#55
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Its been a few years since I followed drag racing.
I thought a redlight was sub .4 R/T.
How did Sid not redlight? Is the R/T set for .0sec for practice?
I thought a redlight was sub .4 R/T.
How did Sid not redlight? Is the R/T set for .0sec for practice?
08-22-2011, 03:34 PM
#58
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They changed it a few years ago. It used to be .500 was a perfect light. A pro tree was .000 iirc. Now it is all .000 regardless of the light sequence used.
08-22-2011, 03:41 PM
#59
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Personally I would use josh's car as a comparison moreso than mine. So if you look at that he needed quite a bit more pressure to come close to your trap speed.
That is what sucks up here, you have to run high boost and a bigger turbo as well.
Edit; also, and this is HUGE.... Both Josh and I were using anti lag with our cars. I have ran mine without it before and it is extremely hard to get a good et and because boost is so laggy the MPH is effected. From what I have seen the cars would have ran around low to mid 14's at 104 ish mph.
Last edited by blown 944; 08-22-2011 at 04:03 PM.
08-22-2011, 04:07 PM
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.500 is still the amount of time between the last yellow bulb and green. Unless your rrunning a pro tree which is .400