Who can read these graphs ?
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Who can read these graphs ? Hi , Who can read these graphs and tell me the issues
My questions above the Graphs
NOTE : Two different tuners tuned the car , Last two Graphs the other tuner
*Is this correct Air Fuel ?
*I don't see any problems with this graph and the curve is good
*Is this correct Air Fuel ?
*Why the curve is going down ?
*Is this correct Air Fuel ?
*Here too Why the curve is going down ?
I talked with my builder and he said sounds like some lifters are bleeding down , I installed new Morel LSX link bar lifters and he said install the short travel lifters , Tuner said bad springs but i'm sure not the springs because all those runs was with same springs
I know the Air Fuel should be on 12 but it shows 13 on the first Graph
What you guys think , I waste alot of money for Dynos , mechanics and replacing parts and still dunno what's this problem , Dunno where to start
Thanks in advance
My questions above the Graphs
NOTE : Two different tuners tuned the car , Last two Graphs the other tuner
*Is this correct Air Fuel ?
*I don't see any problems with this graph and the curve is good
*Is this correct Air Fuel ?
*Why the curve is going down ?
*Is this correct Air Fuel ?
*Here too Why the curve is going down ?
I talked with my builder and he said sounds like some lifters are bleeding down , I installed new Morel LSX link bar lifters and he said install the short travel lifters , Tuner said bad springs but i'm sure not the springs because all those runs was with same springs
I know the Air Fuel should be on 12 but it shows 13 on the first Graph
What you guys think , I waste alot of money for Dynos , mechanics and replacing parts and still dunno what's this problem , Dunno where to start
Thanks in advance
The 1st is tuned to make the most power and too lean IMO by looking at the graph, looks like 13.5 AFR by the end of that run.
The second one is a little rich for my taste but it isn't bad by any means.
Third is too rich.
The second one is a little rich for my taste but it isn't bad by any means.
Third is too rich.
You need to post a graph with torque reading and rpm increments. The AFR is not the issue, even going from 12 AFR to 13.5 will not make a difference of 60 hp. How much rpm is 130 mph? Power always drops after peak... I tune peak torque to 12.5 afr and after that I taper up to 12.8 afr by peak hp for a naturally aspirated engine.
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You need to post a graph with torque reading and rpm increments. The AFR is not the issue, even going from 12 AFR to 13.5 will not make a difference of 60 hp. How much rpm is 130 mph? Power always drops after peak... I tune peak torque to 12.5 afr and after that I taper up to 12.8 afr by peak hp for a naturally aspirated engine.
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Firstly, what do you have?
Cubic inches, heads, cam, forced induction. Different things make power in different rpms. Peaking at 5800-6000 is not that abnormal. These will help people possibly see what is happening.
Also if it is NA vs FI will make a big difference where you want the AFR.
I may have missed that, but I could not find it even on your Facebook links.
Cubic inches, heads, cam, forced induction. Different things make power in different rpms. Peaking at 5800-6000 is not that abnormal. These will help people possibly see what is happening.
Also if it is NA vs FI will make a big difference where you want the AFR.
I may have missed that, but I could not find it even on your Facebook links.
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Thanks for ur replay
My setup is LSX 454 , CR 12:01 , LS7 Mast 305 heads , 661\661 112 , Springs up to 680lift , morel lifters , crower LS7 adjustable rockers , LS7 fast ported 105mm intake and 105 T\B , All was N\A runs , First graph was before I rebuild the engine because was smoking from breather and I changed with new morel link bar lifters and this happens , My builder said install comp short travel lifter
My setup is LSX 454 , CR 12:01 , LS7 Mast 305 heads , 661\661 112 , Springs up to 680lift , morel lifters , crower LS7 adjustable rockers , LS7 fast ported 105mm intake and 105 T\B , All was N\A runs , First graph was before I rebuild the engine because was smoking from breather and I changed with new morel link bar lifters and this happens , My builder said install comp short travel lifter
Last edited by PONTIAC SLP; Aug 28, 2011 at 01:29 PM.
I can tell you my 455 with 94 octane and 11.2:1 it seemed to like 12.8-12.9 AFR. When it went rich 12.4, it appeared it was loosing 20-30hp and when it went 13.05 it appeared to lose about 10-15hp. I have a smaller cam and heads than you but did not peak much higher than you are, it was at 6150 rpm.
Seeing your rpm and torque would help a lot.
If your tuner can send you the actual run file ( .drf), you can send it to me by email and I can change the parameters so we can see what it is actually happening. I have Winpep on two of my computers at home.
I will send you a PM with my email.
Seeing your rpm and torque would help a lot.
If your tuner can send you the actual run file ( .drf), you can send it to me by email and I can change the parameters so we can see what it is actually happening. I have Winpep on two of my computers at home.
I will send you a PM with my email.
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Sorry for delay , Yup the cam installed correctly , I throught it's valve float issue or springs running bad ! , We checked the springs with the springs tool and the pressure was good not weak , I also heared the adjustable rockers may fall at the high RPM if they weren't adjusted correctly but we adjusted the rockers many times and the same ?
