Whats wrong with my build?
Whats wrong with my build? I've posted a few times about my car being down on power and basically running like a bolt-on car. I don't have any cylinders down and there is about 6k miles on the motor. My dyno numbers on a mustang dyno were 385 rwhp and I'm not sure about torque numbers. I need to get a copy of my dyno sheet. I ran a 12.64 at 112mph with a 1.85 60' and I'm not sure of the DA. Here is my build. Would you guys look over my build and give me some input on what I might need to change before I take it back to have it retuned?
10.5:1 compression
PRC Stage 2.5 5.3l heads
MS4 Camshaft
BBK SSI intake with 85mm TB and MAF
Stock Injectors
255 LPH Fuel Pump
SLP Lid
Hooker Super Competition Headers
Magnaflow exhaust system
M6
3.90 rear
I really appreciate any help from you guys.
10.5:1 compression
PRC Stage 2.5 5.3l heads
MS4 Camshaft
BBK SSI intake with 85mm TB and MAF
Stock Injectors
255 LPH Fuel Pump
SLP Lid
Hooker Super Competition Headers
Magnaflow exhaust system
M6
3.90 rear
I really appreciate any help from you guys.
TECH Enthusiast
Joined: Dec 2005
Posts: 530
Likes: 0
From: Owasso,Ok/Honolulu, HI
What is your injector duty cycle too? They are more than likely more than maxxed out, which would be compensated for with less timing. I bet going to something around a 36lb/hr or 42lb/hr injector and raising your timing would help you out a bit.
Im not sure what the duty cycle is but I questioned the tuner about the injector size when he told me the low numbers. He told me the stock injectors would handle up to 450 rwhp which I'm learning more and more is bullshit. Thanks for the input. I'm considering just switching over to a fast 102 intake with 42# injectors before getting it retuned. Do you think that intake is too big for my set-up?
Yeah I went through that with the intake! The screws that hold the service access plate onto the bottom of the intake came loose. I loc-tited them in. What is the cut out you are referring too?
TECH Enthusiast
Joined: Dec 2005
Posts: 530
Likes: 0
From: Owasso,Ok/Honolulu, HI
Im not sure what the duty cycle is but I questioned the tuner about the injector size when he told me the low numbers. He told me the stock injectors would handle up to 450 rwhp which I'm learning more and more is bullshit. Thanks for the input. I'm considering just switching over to a fast 102 intake with 42# injectors before getting it retuned. Do you think that intake is too big for my set-up?
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We talked on the phone about my car. I'm starting to think I need bigger injectors. I'm gonna get a hold of the guy who tuned it and get my dyno sheets and ask him about the injector duty cycle. He won't be tuning my car again!
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The intake is not costing you that much power...something else is up. As others mentioned, need to see what IDC is. That combo should be 118-120mph capable in decent air.
TECH Enthusiast
Joined: Dec 2005
Posts: 530
Likes: 0
From: Owasso,Ok/Honolulu, HI
Agreed. Get those injectors installed and a good tune done then if you aren't happy, get a new intake setup. I bet you see 440-450 with the added timing you will be able to run.
First thing you should do is look up the DA for the track and day you ran. And also weigh the car if you haven't.
I maxed stock injectors at 370rwhp through an auto. There is no way in hell a donkey dick cam and ported head car doesn't need more so that's a good place to start.
I maxed stock injectors at 370rwhp through an auto. There is no way in hell a donkey dick cam and ported head car doesn't need more so that's a good place to start.
Thanks guys! I think I just got off on the wrong foot with the tuner I took the car to. I'm going to try to get a hold of someone to tune the car after I install the new injectors. Any suggestions would help out.
I had awesome results with Race Proven Motorsports in Delaware as well as Rapid Motorsports in Birdsborough. But I am also located in Harrisburg so both places where not to bad a drive for me. You are a bit further west so I am not sure what would be good around you. But the tune is such an important part that sometimes its worth a little travel.
Just out of curiousity I hooked up my power programmer tonite and under real time data logging I watched my spark advance at WOT. It's running 30 at WOT. Isn't that high?
I had awesome results with Race Proven Motorsports in Delaware as well as Rapid Motorsports in Birdsborough. But I am also located in Harrisburg so both places where not to bad a drive for me. You are a bit further west so I am not sure what would be good around you. But the tune is such an important part that sometimes its worth a little travel.
TECH Enthusiast
Joined: Dec 2005
Posts: 530
Likes: 0
From: Owasso,Ok/Honolulu, HI
I can tell you having a good tuner regardless of time of distance is worth its weight in gold. I only 1-2 times a year to get someone good in my neck of the woods since i live in hawaii.
I'm not sure. My programmer doesn't show IDC but its suppose to show injector pulse width. I just can't find it. I have to get it tuned when I get the injectors installed so I'm just going to get it dyno tuned and I'll let you know how it goes. I really appreciate your help!