dynoed and tuned the g today... vortech people i need advice
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dynoed and tuned the g today... vortech people i need advice
i picked up my car from altered atmosphere today to have them dyno and tune my g35 coupe. end result was 341.1 rwhp and 298.6 tq. a/f is flat at about 11.8 after 3k rpm. boost is just above 0.6 bar. it was about 45 degrees when they dynoed and about 30 percent humidity. i do have the vortech installed and other goodies but what concerns me is that other g's and z's w/the vortech are pulling out 360-370 rwhp and 310-325 tq w/the stock pulley. i left my old ur pulleys on for the p/s and water pump but i went back to the stock crank pulley. injen exhaust, stock cats, and grounding kit are installed also. the tech was having a problem w/the belt being loose but they tightened it down a little. mike and dave were extremely helpful and curtious so they definatley have my business. anyone have ne ideas on the lack of power?
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Originally Posted by booger
First...What kind of Dyno ? 2nd....Stock 3.33 serp pulley or 3.12 ?
I dont know bar for boost...what is 0.6 bar ? how many lb's of boost ? Post the dyno chart if you can
I dont know bar for boost...what is 0.6 bar ? how many lb's of boost ? Post the dyno chart if you can
Last edited by huducks; 03-12-2005 at 02:15 PM.
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so .6 bar is 14.5 x 0.6 = 8.7psi of boost
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Thx Jeff
You have plenty of boost for the stock pulley . The A/F looks pretty good .Dont think you had belt slipping with 8.5 lb's of boost . Looks like they got rid of the normal dip in the power curve at around 5,000rpm with timing adjustments . You might want to think about going with the 3.12 pulley . Do you have stock exhaust ?
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Thx Jeff
You have plenty of boost for the stock pulley . The A/F looks pretty good .Dont think you had belt slipping with 8.5 lb's of boost . Looks like they got rid of the normal dip in the power curve at around 5,000rpm with timing adjustments . You might want to think about going with the 3.12 pulley . Do you have stock exhaust ?
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stock manifolds and cats but injen cat back. i have test pipes sitting in my room but i hear w/a s/c setup a little back pressure is better than none.
Last edited by huducks; 03-12-2005 at 02:29 PM.
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A'F looks pretty good. My guess is you need to open up with headers and straight pipes, and you will gain power to the 375'ish and beyond level. When you look at the guys with Vortechs making near 400whp, they all had significant additional mods that got them there.
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I'd like to see your R4 maps, especially the timing grid. The multiple dips in the torque curve look a bit odd--but other than that I'm not sure what to say other than what others have said about "opening her up a bit" with different cats.
--Steve
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Originally Posted by zimbo
I'd like to see your R4 maps, especially the timing grid. The multiple dips in the torque curve look a bit odd--but other than that I'm not sure what to say other than what others have said about "opening her up a bit" with different cats.
--Steve
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At least your boosting...my cog pulley shredded of the other day on may way home from work. I cut the thing to pieces...having AAM get me another and strap it on next week.. Kinda inetersting though, b/c now I get to see how fast my car is with just the cams, and my other mods and the AAM reflash...def faster than what i remeber felling befor I had the supercharger slapped on...
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Originally Posted by aron
At least your boosting...my cog pulley shredded of the other day on may way home from work. I cut the thing to pieces...having AAM get me another and strap it on next week.. Kinda inetersting though, b/c now I get to see how fast my car is with just the cams, and my other mods and the AAM reflash...def faster than what i remeber felling befor I had the supercharger slapped on...
Aaron
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Aaron, ya think you could shorten or tighten up your sig just a tad? It takes up more than an entire screen's worth of real estate.
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huducks,
Exactly how much time did they spend tuning your car? The A/F is not smooth at all, 11.5:1 AFR at 3300 rpms is way to rich. You should not see such huge dips and valleys on your torque curve or A/F curve. Your paying them to smoothing up the torque and you should get that. I'd like to see what the first couple pulls, baselines, were without tuning. I suspect you feel some roughness with the power delivery with that state of tune.
Tuan
Exactly how much time did they spend tuning your car? The A/F is not smooth at all, 11.5:1 AFR at 3300 rpms is way to rich. You should not see such huge dips and valleys on your torque curve or A/F curve. Your paying them to smoothing up the torque and you should get that. I'd like to see what the first couple pulls, baselines, were without tuning. I suspect you feel some roughness with the power delivery with that state of tune.
Tuan
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Originally Posted by zero2prove
huducks,
Exactly how much time did they spend tuning your car? The A/F is not smooth at all, 11.5:1 AFR at 3300 rpms is way to rich. You should not see such huge dips and valleys on your torque curve or A/F curve. Your paying them to smoothing up the torque and you should get that. I'd like to see what the first couple pulls, baselines, were without tuning. I suspect you feel some roughness with the power delivery with that state of tune.
Tuan
Exactly how much time did they spend tuning your car? The A/F is not smooth at all, 11.5:1 AFR at 3300 rpms is way to rich. You should not see such huge dips and valleys on your torque curve or A/F curve. Your paying them to smoothing up the torque and you should get that. I'd like to see what the first couple pulls, baselines, were without tuning. I suspect you feel some roughness with the power delivery with that state of tune.
Tuan
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booger,
I've tuned with the R4 several times already on SC NSX's so I'm fairly familiar with it. I still believe he should have gotten a better tune than that.
Tuan
I've tuned with the R4 several times already on SC NSX's so I'm fairly familiar with it. I still believe he should have gotten a better tune than that.
Tuan