Self Tuning With SCT Pro Racer

cj428mach

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Yup. I'm hoping 50 psi base pressure gets me there.

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That won't help much, me and a buddy both maxed our id1000s on stock long blocks with e85 2.3 tvs setups. Base pressure helps a little but it wouldn't get us there.
 

03cobra#2

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That won't help much, me and a buddy both maxed our id1000s on stock long blocks with e85 2.3 tvs setups. Base pressure helps a little but it wouldn't get us there.
I went back and saw the thread you posted when you ran out of injector. It looks like with the id1000's you had a 4lb lower with a base pressure of 39 lbs. Pushing close to 30 psi? Then you took the 4lb lower off and were under 89% injector duty cycle.

I plan on sticking somewhere around 24-26 lbs, and will rev to 6500 or so. Also have twin walboro 465 high pressure pumps. So if and that's a big if my tuner feels comfortable raising base pressure to 50 even 60psi to put the injectors at a reasonable duty cycle, the pumps are capable of it. So if it's borderline at 40psi base pressure and going to 50-60 puts things in a safer range I'm OK with that. The car won't see 6500 rpm that often.

Im not trying to make a square peg fit in a round hole so if it's not close with the fic1000's then out they will come. I'll just have to wait and see.

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Kubin-B

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I have not. I had a config file ahead of time. You could ask Don if he has a config file he could send you.

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He sent me one and everything in it failed to convert. Been having an issue getting a hold of SCT as well plus they had already worked on it twice previously. From what I'm gathering no one else has had this issue so I'm not sure what is making my cobra special. I'm using a bdx handheld with the sct tuning software and livelink 2.

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cj428mach

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No I ran 50psi base pressure, stock long block 22-23lbs on a 2.3 tvs. My buddy was the same but may have gone 60psi to try to make it work. Injector dynamics have a calculator on their website and id1000s are getting maxed out at low 700s on e85 if memory serves.

Malcolm ran a 2.9 crusher with heads/cam id1000s and e85 and 27+ psi but could barely get the rpms up 4-5000rpm and it was out of fuel. I think you 'll have a wasted dyno trip and be pulling the blower again for bigger injectors.a 3.4l at that boost is pushing it, add in cams and I don't see anyway it can work.
 

03cobra#2

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No I ran 50psi base pressure, stock long block 22-23lbs on a 2.3 tvs. My buddy was the same but may have gone 60psi to try to make it work. Injector dynamics have a calculator on their website and id1000s are getting maxed out at low 700s on e85 if memory serves.

Malcolm ran a 2.9 crusher with heads/cam id1000s and e85 and 27+ psi but could barely get the rpms up 4-5000rpm and it was out of fuel. I think you 'll have a wasted dyno trip and be pulling the blower again for bigger injectors.a 3.4l at that boost is pushing it, add in cams and I don't see anyway it can work.
If I need I can buy the injectors and have the shop put them in while the car is there. I've read all over the last couple months and it goes either way. They do work and they don't with combos similar to mine.

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03cobra#2

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Just a small update. My tuner seems to think we'll be ok with the FIC1000's.... No gaurentees obviously. He went on to say he's fine running increases base pressure to 50+psi. If not looks like I'll be upgrading injectors while the car is there. In the end I just want a good number and safe tune. Also I replaced my plugs. Went from NGK TR6's to TR7XI's gapped at. 020 per his recommendation.

Still trying to decide on what pulley to run.

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03cobra#2

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Ended up ordering up a metco 2l lower to team up with my 3.5 upper. I'm guessing that should put me around 24-26lbs.

While I'm waiting for my June 10th appt I'm going to continue to dial in my tune. Heck if I get it close enough maybe my tuner will just work off my existing tune rather then start from scratch. Either way I want to continue to learn. Hopefully everything goes well and I'll update with dyno numbers.

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03cobra#2

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Just a check in. I've been continuing work on my tune. Been working on the maf curve and starting to get into some WOT logging. Today I went up to 5400rpm. Looks like boost is in the 22-23lb area. I do have a 2lb lower on the way. Not sure if I'm going to use it or not. Car pulls nice and strong. Looking over my logs show that just before I let out at 5400 af was at .74, fuel pressure was holding steady at 41psi (40psi base pressure), injector duty cycle was at .89, and maf counts at 758. Im hoping that if I strap on the 2lb lower, and kick base pressure up to 50-60 psi I should be ok with the injectors I have. If not I'll leave the 2lb lower off. Also I may need to rescale the maf but not sure yet. I plan to rev up to 6500 or so.

I am still keeping my dyno tune date for June 10th. I'll let him raise base pressure, rescale maf ect assuming he'll even want to use my tune, he may want to start from scratch. Here is a screen shot of log at the 5400 rpm.

Edit: for correct screen shot.
4b4983096d19a9f44d5a6d72fef9053b.png
 
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03cobra#2

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Can someone chime in and let me know what I need to adjust if I want to go ahead and increase my base fuel pressure?

Edit: I'm wondering if I need to scale the injector data or just adjust the maf curve to get the fueling correct.
 

c6zhombre

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Who's the tuner? I've never seen anyone recommend iridiums at high boost levels or on ethanol. Check those plugs frequently and inspect the tips for damage. TR6s are tried n true
 

03cobra#2

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It's a shop here in my area that does tune Fords, and other makes and models. He said to get TR7's in there and gap them at .020. I did and the car seems to run well on them.
 

c6zhombre

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It's a shop here in my area that does tune Fords, and other makes and models. He said to get TR7's in there and gap them at .020. I did and the car seems to run well on them.

Interesting......there is no copper TR7.....the copper range 7 is called a BR7EF. So, it is confusing if he got TR7 mixed up with BR7EF.

Now there are iridiums in both ranges with consistent naming.....TR6IX and TR7IX. Not sure why ngk made it so confusing on the coppers
 

c6zhombre

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Also regarding the injectors.....I'm about 99.9% sure 04sleeper has tuned terminators around 800 wheel with ID1000s. I know with certainty he tuned 94slowbras with ID1050x and that car is most likely in excess of 800 wheel (not yet dynoed but mod combo should be over 800)

I'm guessing your setup should be right around that power range
 

Blown38

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Can someone chime in and let me know what I need to adjust if I want to go ahead and increase my base fuel pressure?

Edit: I'm wondering if I need to scale the injector data or just adjust the maf curve to get the fueling correct.

From Decipha's site.

Injector Slope Tuning
The injector slopes can be thought of as global fuel multipliers. A smaller injector slope (smaller injector size) will spray MORE FUEL than a larger injector to deliver the same air/fuel ratio. Thus, decreasing the injector slope will RICHEN the fuel mix. This can ONLY be done when the MAF curve is correct and measuring airflow accurately.
Fuel Pressure
Changing the fuel pressure will change the Injector Slopes and Voltage Offset for ballpark quick adjustment, I compensate 1% per psi, so if you up the pressure from 40 to 60, i would multiply the slopes by 1.20 if I drop the pressure from 40 to 20, i would multiply the slopes by 0.80, if i went from 40 to 45 the i would multiply by 1.05 not exact, but good enough for government work, also keep in mind most injectors are rated at 43.5 psi where as a factory ford fuel pressure regulator will regulate the injection (delta) pressure at 39psi
 

03cobra#2

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From Decipha's site.

Injector Slope Tuning
The injector slopes can be thought of as global fuel multipliers. A smaller injector slope (smaller injector size) will spray MORE FUEL than a larger injector to deliver the same air/fuel ratio. Thus, decreasing the injector slope will RICHEN the fuel mix. This can ONLY be done when the MAF curve is correct and measuring airflow accurately.
Fuel Pressure
Changing the fuel pressure will change the Injector Slopes and Voltage Offset for ballpark quick adjustment, I compensate 1% per psi, so if you up the pressure from 40 to 60, i would multiply the slopes by 1.20 if I drop the pressure from 40 to 20, i would multiply the slopes by 0.80, if i went from 40 to 45 the i would multiply by 1.05 not exact, but good enough for government work, also keep in mind most injectors are rated at 43.5 psi where as a factory ford fuel pressure regulator will regulate the injection (delta) pressure at 39psi

Thank you for that info. MAF curve is pretty much dialed in up to about 700-750 maf counts so I think it's time to bump fuel pressure. Again fantastic info.

Edit: interesting to get different tuners opinions on how to tune for increased base fuel pressure. One tuner says to increase / scale slopes, breakpoint, and voltage offsets. Another tuner says to adjust the maf curve to bring fueling in line. Will have to do more research.
 
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01yellercobra

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Yes I did. It provides pretty usefull info in datalogging.
My understanding is that by keeping the FRPS you can adjust the base pressure and the ECU will adjust as needed.

Its not something I've messed with as I changed things before getting that far. But it is what I read when I was researching return systems and one of the reasons I still have mine.
 

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