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Dyno might have read wrong, what about this mid 13's in 1/4 mile?

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Old 07-27-2005, 02:40 AM
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Dyno might have read wrong, what about this mid 13's in 1/4 mile?

A picture is worth 1000 words.
Comparison between my best tuned vs. my best untuned. Same PSI (7 PSI)...
Renesis is very very capable... :D Almost 13.6! Just by 1/1000 of a second... I actually consider this a 13.6s


Hey experts, do i have 240 at the wheels? We are in calgary which is about 3600 above sea level. I was told we loose about 8-10% power due to the altittude. Is this true?
Attached Thumbnails Dyno might have read wrong, what about this mid 13's in 1/4 mile?-hpg_13.7_tuned-vs-14-1-.jpg   Dyno might have read wrong, what about this mid 13's in 1/4 mile?-hp_13.7_tuned-vs-14-1-.jpg   Dyno might have read wrong, what about this mid 13's in 1/4 mile?-distance_13.7_tuned-vs-14-1-.jpg   Dyno might have read wrong, what about this mid 13's in 1/4 mile?-dyno-rx8_100k.jpg  

Last edited by Lschiavo; 07-27-2005 at 02:58 AM.
Old 07-27-2005, 03:52 AM
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Originally Posted by Lschiavo
A picture is worth 1000 words.
Comparison between my best tuned vs. my best untuned. Same PSI (7 PSI)...
Renesis is very very capable... :D Almost 13.6! Just by 1/1000 of a second... I actually consider this a 13.6s


Hey experts, do i have 240 at the wheels? We are in calgary which is about 3600 above sea level. I was told we loose about 8-10% power due to the altittude. Is this true?
Only N/A cars lose power due to altitude, your car at 8PSI will make the same amount of power a mile high as it will at sea level. Reason being is you're creating your own atmospheric pressure by adding boost.
Old 07-27-2005, 09:08 AM
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Originally Posted by SSR Engineering
Only N/A cars lose power due to altitude, your car at 8PSI will make the same amount of power a mile high as it will at sea level. Reason being is you're creating your own atmospheric pressure by adding boost.
Don't forget the air is less dense at the higher altitude so turbo cars also lose some power at higher elevations as well.
Old 07-27-2005, 09:24 AM
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Wow!!!

what rpm are you launching at? Is there any wheel hop? Looks like you would easily be in the high 12z at sea level and w/slicks........btw Do you have any pics of your car?
Old 07-27-2005, 09:35 AM
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congrats!!!!!!!!!!
Old 07-27-2005, 10:28 AM
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Lschiavo, what size tires are you running front and rear?
Old 07-27-2005, 11:16 AM
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Dude, I want to come out next time you're doing a run and watch! :D I guess you can't tell me where that is though...in case cops are watching this forum
Old 07-27-2005, 11:19 AM
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Originally Posted by SSR Engineering
Only N/A cars lose power due to altitude, your car at 8PSI will make the same amount of power a mile high as it will at sea level. Reason being is you're creating your own atmospheric pressure by adding boost.
Still turbo has to work harder to get to that pressure, am i right?
Old 07-27-2005, 11:20 AM
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Originally Posted by khtm
Dude, I want to come out next time you're doing a run and watch! :D I guess you can't tell me where that is though...in case cops are watching this forum
Pm me and we go for a ride today!!! :D
Old 07-27-2005, 11:21 AM
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Originally Posted by Red Devil
Lschiavo, what size tires are you running front and rear?
Stock tires
Old 07-27-2005, 11:23 AM
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LUCKY (quoting napoleon dynamite)
Old 07-27-2005, 11:29 AM
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Originally Posted by DARKMAZ8
Wow!!!

what rpm are you launching at? Is there any wheel hop? Looks like you would easily be in the high 12z at sea level and w/slicks........btw Do you have any pics of your car?
I am losing a lot of traction. Launching only at 4k. If launch higher all i get is massive wheelspin.
Old 07-27-2005, 11:34 AM
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dont forget you promised me i could drive your car :D

seriously though, i just want to sit in it!

Last edited by canadian_8; 07-27-2005 at 11:43 AM.
Old 07-27-2005, 11:34 AM
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Originally Posted by Lschiavo
I am losing a lot of traction. Launching only at 4k. If launch higher all i get is massive wheelspin.
wow,
launching at only 4k i am sooooo jealous.

beers
Old 07-27-2005, 11:43 AM
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Originally Posted by canadian_8
louis, dont forget you promised me i could drive your car :D

seriously though, i just want to sit in it!
Whenever you want... I am around all the time! :D
Old 07-27-2005, 11:43 AM
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pmed
Old 07-27-2005, 11:50 AM
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Originally Posted by canadian_8
pmed
pmed back!
Old 07-27-2005, 11:57 AM
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This may be a good time to post your map for people to use and compare. Might be a good starting point for people that are tuning.....
Old 07-27-2005, 11:59 AM
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Originally Posted by FONZIE
This may be a good time to post your map for people to use and compare. Might be a good starting point for people that are tuning.....
Read my thread "tuning greddy today" and you will know all I am running
Old 07-27-2005, 12:11 PM
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Ever plan on taking it to a track to get real times?
Old 07-27-2005, 12:17 PM
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Originally Posted by IkeWRX
Ever plan on taking it to a track to get real times?

Whenever I have some time, however I think these times are pretty accurate since i did a 15.3 in gtech when i was stock and I got a 15.2 in the dragstrip.

Still doubtful? Here is a hint...
Attached Thumbnails Dyno might have read wrong, what about this mid 13's in 1/4 mile?-dscn0747.jpg  

Last edited by Lschiavo; 07-27-2005 at 12:24 PM.
Old 07-27-2005, 12:19 PM
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Originally Posted by khtm
Dude, I want to come out next time you're doing a run and watch! :D I guess you can't tell me where that is though...in case cops are watching this forum

KHTM, U have your messages mailbox full, clean it up
Old 07-27-2005, 12:33 PM
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Originally Posted by Lschiavo
KHTM, U have your messages mailbox full, clean it up
Oops! :o

Try again!
Old 07-27-2005, 12:53 PM
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Luis while you do lose some power with altitude, you don't lose nearly as much as a naturally aspirated car. As you pointed out, although the turbo can compensate and provide you with the amount of boost you desire, it has to spin faster to do it. This means more heat and lower efficiency for the boost you are running vs sea level. You still do lose a few percent to sea level though. SAE correction is setup to correct nontubo cars, not forced induction cars. It is a huge mistake for correction to be used on turbo cars so you should go by a noncorrected. Either way you won't get the exact same power numbers you would at sea level uncorrected but then again when was the last time you saw 2 different dynos anywhere give the same numbers? Just correct for temperature only, not altitude. Your uncorrected numbers will come back a little low but your corrected numbers will come back a little high. The key is knowing which one is closer to the truth. That would be the uncorrected sea level based one.
Old 07-27-2005, 01:04 PM
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Originally Posted by rotarygod
Luis while you do lose some power with altitude, you don't lose nearly as much as a naturally aspirated car. As you pointed out, although the turbo can compensate and provide you with the amount of boost you desire, it has to spin faster to do it. This means more heat and lower efficiency for the boost you are running vs sea level. You still do lose a few percent to sea level though. SAE correction is setup to correct nontubo cars, not forced induction cars. It is a huge mistake for correction to be used on turbo cars so you should go by a noncorrected. Either way you won't get the exact same power numbers you would at sea level uncorrected but then again when was the last time you saw 2 different dynos anywhere give the same numbers? Just correct for temperature only, not altitude. Your uncorrected numbers will come back a little low but your corrected numbers will come back a little high. The key is knowing which one is closer to the truth. That would be the uncorrected sea level based one.

Exactly, they told me correction factor was around 8% that day. I think we might put it only at 3-4% to compensate for the efficiency and heat due to the need of the turbo to spin faster. Air is very thin here, no much oxigen, i can feel it when running or doing exercises. However if we take the whole 8% out I would still land with a nice 227 WHP on a mustang which might mean 250 in adynojet. Not bad i guess. Thanks for ur input


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