5.3 MS3 prc2.5 dyno results
04-11-2016, 05:10 PM
#1
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5.3 MS3 prc2.5 dyno results Have a fresh stock bottom end lm7 ms3 cam. Prc2.5 5.3 heads, kooks 1 7/8 long tubes. Bbk ssi intake. Th400 with 3.55 rear gear.
Car made 325whp@6300 rpm 295tq
Does this seem low? Should i still be making power at higher rpm?
Id post the graph, but have trouble posting pics here.
Car made 325whp@6300 rpm 295tq
Does this seem low? Should i still be making power at higher rpm?
Id post the graph, but have trouble posting pics here.
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04-11-2016, 10:06 PM
#9
Probably low timing and not taking the car high enough in the RPM's, with a cam that large in a 5.3 your gonna be revving to 7k without a problem. Way too much cam unless you have an intended use for it, like racing.
04-11-2016, 10:59 PM
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It is pretty much a dedicated drag car that gets a good amount of spray. Tuner said i was at 27 degrees for timing
04-12-2016, 12:23 PM
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Thats what i thought. Turns out i have a bad map sensor code p0106. Not sure if that is affecting power output.
04-12-2016, 07:22 PM
#13
You need to rev at least 1k rpms higher, maybe more, and sort out that issue and retune. Bad MAP sensor will hurt you. That engine will not make a ton of torque but should wail like a banshee. That TH400 is going to hurt you hitting a dyno number too. What kind of car and rear end?
04-12-2016, 10:16 PM
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You need to rev at least 1k rpms higher, maybe more, and sort out that issue and retune. Bad MAP sensor will hurt you. That engine will not make a ton of torque but should wail like a banshee. That TH400 is going to hurt you hitting a dyno number too. What kind of car and rear end?
04-14-2016, 12:55 PM
#15
Ah, beefy rear and beefy trans are for track runners, not dyno queens. You're gonna have 20% driveline loss, maybe a tad more. Combine that with your tuning headaches and screaming powerband, I think that solves it. Get your tune right, run it a bit past 7k, do the math on the losses, and I think you'll be in the ballpark you're expecting. Regardless, and you know this, the ET and trap speed are your story here.
04-14-2016, 02:08 PM
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Ah, beefy rear and beefy trans are for track runners, not dyno queens. You're gonna have 20% driveline loss, maybe a tad more. Combine that with your tuning headaches and screaming powerband, I think that solves it. Get your tune right, run it a bit past 7k, do the math on the losses, and I think you'll be in the ballpark you're expecting. Regardless, and you know this, the ET and trap speed are your story here.