Critique my Dyno Graph Procharged!
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Joined: May 2005
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From: Port St. Lucie, Fl
Critique my Dyno Graph Procharged! Had the car on a mustang dyno about a week ago. It's an automatic and has procharger with just 5 lbs of boost, 347 forged, fast 102 patriot 243 heads with dual valve springs. Any idea why tq drops off the way it does. The shop says I may need new valve springs but unsure. There is no abnormal ticking or such, It drives good on the street. Any suggestions what this graph is saying. Much apprecitated.
Could the block be cracked? Or heads? Could it be belt slippage, its a 6 rib. Or torque converter not fully locked?
Could the block be cracked? Or heads? Could it be belt slippage, its a 6 rib. Or torque converter not fully locked?
Last edited by corvet786c; Apr 29, 2015 at 11:05 AM.
What springs and cam is in there?
Can't imagine something is cracked, that would show up much more than just lost power. And I hope those numbers are with the converter unlocked.
Can't imagine something is cracked, that would show up much more than just lost power. And I hope those numbers are with the converter unlocked.
Thread Starter
Joined: May 2005
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From: Port St. Lucie, Fl
Patriot dual valse springs and a blower cam, dont know the specs though. I was not there when car was tuned.
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From: Port St. Lucie, Fl
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Verdad Gallardo Thread Starter
Joined: May 2005
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From: Port St. Lucie, Fl
Before jumping in too deep, can you pull a set of springs off of one cylinder and test them? That will tell you quickly if the valve springs are the issue. Is there any way to get more information on the cam that is installed in the car?
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Joined: May 2005
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From: Port St. Lucie, Fl
FWIW, I did speak to the dyno tuner and he said that the lines indicated that their dyno may not have been properly set up. Whatever that means. I was running worn cracked Pirelli tires out back when dynoed and now have nitto nto5r's.
When taking the car out for a test drive she pulls very well, even from 5000-5500 where the tq seems to fall off, speedometer still climbing very fast. So I don't know what to think regarding this. The tuner did take out any knock if there were any. Thoughts.
Well, that kind of throws the whole thing out the window. I think I would get a dyno pull elsewhere if possible to ensure you are not chasing a ghost. That also makes you wonder about the tune if the dyno was an issue during tuning.
Yep try taking it elsewhere to another place. Just keep in my you stated you where dynoed on a mustang dyno. If you make a run on another kind of dyno, the numbers will most likely be different. For instance going from a mustang to a dynojet. The dynojet will read as high as 30hp more. That's why I personally don't play the numbers game.
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From: Port St. Lucie, Fl