Well My FI Days Have Come To An End.....
#31
04-07-2008, 09:14 AM
#32
04-07-2008, 09:15 AM
#33
04-07-2008, 09:57 AM
Damn man that sucks. And I thought I had it bad!
That's some insane power for an SC though, 380 whp at 5200 RPM!?
We can probably estimate your top end power. Found an ATI dyno from my350z:
http://i162.photobucket.com/albums/t...-1722-27-1.jpg
Assuming the curve shapes are similar, it looks they can be [crudely] modeled with a piece-wise linear function (2 pieces) - the first with an aggressive slope up to about 5200 RPM, the second piece with a less aggressive slope to redline. If you were hitting 380 whp at 5200 RPM, we can estimate a slope of about m1 = (380 - 0)/(5200 - 0) = 0.073077 for the first piece (the estimate cuts off portions of the curve, but it's not awful). Assuming similar characteristics to the 350z curve, looks the slope for the second piece of the curve (> 5200 RPM) is roughly 70% of the slope of the first piece. So m2 ~= (0.7)(0.073077) = 0.051154. Knowing the second slope and the first point of the second piece (380 whp, 5200 RPM), we can solve for the redline point:
m2 = 0.051154 = (x - 380)/(6600 - 5200)
x ~= 450 whp (@ 6600 RPM)
*This is just a crude model (assumes your curve is similar to the Z), but that's some pretty crazy power for an SC. If you really were hitting those kind of numbers, it may explain why the motor blew.
Man, I'm pulling everything I can out of my Vortech and I'm barely breaking 400 at the wheels at 6800 RPM with a raised redline.
That's some insane power for an SC though, 380 whp at 5200 RPM!?
We can probably estimate your top end power. Found an ATI dyno from my350z:
http://i162.photobucket.com/albums/t...-1722-27-1.jpg
Assuming the curve shapes are similar, it looks they can be [crudely] modeled with a piece-wise linear function (2 pieces) - the first with an aggressive slope up to about 5200 RPM, the second piece with a less aggressive slope to redline. If you were hitting 380 whp at 5200 RPM, we can estimate a slope of about m1 = (380 - 0)/(5200 - 0) = 0.073077 for the first piece (the estimate cuts off portions of the curve, but it's not awful). Assuming similar characteristics to the 350z curve, looks the slope for the second piece of the curve (> 5200 RPM) is roughly 70% of the slope of the first piece. So m2 ~= (0.7)(0.073077) = 0.051154. Knowing the second slope and the first point of the second piece (380 whp, 5200 RPM), we can solve for the redline point:
m2 = 0.051154 = (x - 380)/(6600 - 5200)
x ~= 450 whp (@ 6600 RPM)
*This is just a crude model (assumes your curve is similar to the Z), but that's some pretty crazy power for an SC. If you really were hitting those kind of numbers, it may explain why the motor blew.
Man, I'm pulling everything I can out of my Vortech and I'm barely breaking 400 at the wheels at 6800 RPM with a raised redline.
#34
04-07-2008, 10:04 AM
Originally Posted by Hi-Tech_G
Sounds like your rod went through the oil pan. I have had this happen with a 97 GS-R. I was running a Turbonetics Kit and the same thing happened....driving home from hanging out with some friends....loud clank followed by a pop and an oil trail about a 1000 feet long....and clouds of smoke. Sorry to hear man. This just makes me change my mind more and more about boosting the G.
#35
04-07-2008, 10:50 AM
Originally Posted by Mr_pharmD
Sorry to hear it man. I know how it feels for I blew my motor too last yr in my vortech AT g35. I was pushing over 400hp tho and had redline mine when it blew. How much timing did they add to your tune bc there must have been a reason why u're tune was only up to 5500 and not to redline. U're best bet is to do a tear down and see how the pistons looks (detonations, etc) to determine if it was a weak rod or a tunning issue. Hopefully your heads are okay so u don't have to buy a longblock. GL
#36
04-07-2008, 10:52 AM
Originally Posted by accordfreak
wow dude.. sorry to see that. hopefully you'll be back up and running soon.
btw: was the tune conservative? i'm wondering about your timing also. what was your fuel setup like? oil level full too?
btw: was the tune conservative? i'm wondering about your timing also. what was your fuel setup like? oil level full too?
#37
04-07-2008, 10:58 AM
Originally Posted by Moog
wait...if you had that aggressive of a tune @ 5200rpms, then was it tuned to redline? And the question is...if it wasn't tuned to redline then how many times did you take it there?
#38
04-07-2008, 11:00 AM
#39
04-07-2008, 11:01 AM
Originally Posted by aero
Damn man that sucks. And I thought I had it bad!
That's some insane power for an SC though, 380 whp at 5200 RPM!?
We can probably estimate your top end power. Found an ATI dyno from my350z:
http://i162.photobucket.com/albums/t...-1722-27-1.jpg
Assuming the curve shapes are similar, it looks they can be [crudely] modeled with a piece-wise linear function (2 pieces) - the first with an aggressive slope up to about 5200 RPM, the second piece with a less aggressive slope to redline. If you were hitting 380 whp at 5200 RPM, we can estimate a slope of about m1 = (380 - 0)/(5200 - 0) = 0.073077 for the first piece (the estimate cuts off portions of the curve, but it's not awful). Assuming similar characteristics to the 350z curve, looks the slope for the second piece of the curve (> 5200 RPM) is roughly 70% of the slope of the first piece. So m2 ~= (0.7)(0.073077) = 0.051154. Knowing the second slope and the first point of the second piece (380 whp, 5200 RPM), we can solve for the redline point:
m2 = 0.051154 = (x - 380)/(6600 - 5200)
x ~= 450 whp (@ 6600 RPM)
*This is just a crude model (assumes your curve is similar to the Z), but that's some pretty crazy power for an SC. If you really were hitting those kind of numbers, it may explain why the motor blew.
Man, I'm pulling everything I can out of my Vortech and I'm barely breaking 400 at the wheels at 6800 RPM with a raised redline.
That's some insane power for an SC though, 380 whp at 5200 RPM!?
We can probably estimate your top end power. Found an ATI dyno from my350z:
http://i162.photobucket.com/albums/t...-1722-27-1.jpg
Assuming the curve shapes are similar, it looks they can be [crudely] modeled with a piece-wise linear function (2 pieces) - the first with an aggressive slope up to about 5200 RPM, the second piece with a less aggressive slope to redline. If you were hitting 380 whp at 5200 RPM, we can estimate a slope of about m1 = (380 - 0)/(5200 - 0) = 0.073077 for the first piece (the estimate cuts off portions of the curve, but it's not awful). Assuming similar characteristics to the 350z curve, looks the slope for the second piece of the curve (> 5200 RPM) is roughly 70% of the slope of the first piece. So m2 ~= (0.7)(0.073077) = 0.051154. Knowing the second slope and the first point of the second piece (380 whp, 5200 RPM), we can solve for the redline point:
m2 = 0.051154 = (x - 380)/(6600 - 5200)
x ~= 450 whp (@ 6600 RPM)
*This is just a crude model (assumes your curve is similar to the Z), but that's some pretty crazy power for an SC. If you really were hitting those kind of numbers, it may explain why the motor blew.
Man, I'm pulling everything I can out of my Vortech and I'm barely breaking 400 at the wheels at 6800 RPM with a raised redline.
#40
04-07-2008, 11:01 AM
#41
04-07-2008, 11:06 AM
#42
04-07-2008, 11:09 AM
Good luck with everything.
#43
04-07-2008, 11:10 AM
Originally Posted by g35man04
well hell I dont know man....I am trying to get ahold of him to email me the graphs....
#44
04-07-2008, 11:12 AM
#45
04-07-2008, 11:13 AM
VQ motor for sale local: http://dallas.craigslist.org/pts/619409389.html
Short Block packages: http://www.importpartspro.com/shblpa.html
Short Block packages: http://www.importpartspro.com/shblpa.html