LS Engine With MS3X Not Pulling Up Top

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ffr3247r
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LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

I'm hoping to get some help for a buddy of mine. He has a LS swapped Camaro. Its a 5.3 with a BW S475. He is running a TH400 with a 3.27 gear. Injectors are ID1000's on E85. Thought he was running out of fuel so installed a Boost a pump and it still falls over up top. Its as though it hits a rev limiter.

Thought it was voltage so replaced alternator and new1/0 wiring. We notice the data logs showed a voltage drop under higher RPM is the reason. Swapped to different coils, played with dwell settings, verified timing with a piston stop, and on and on. He has fought this for 2 years.

Can someone look at the logs and see if something stands out as wrong. Box is a 3.57 board bought new assembled.
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
gjestico
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Re: LS Engine With MS3X Not Pulling Up Top

Post by gjestico »

How is the tachin to the board configured ? Is that a 24x or 58x engine ?
67 Chevelle, LSX V8 engine, EFI., cuppa 80's TPI projects....I like wires.
ffr3247r
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Re: LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

Its a 24X using the cam input and the wheel code is selected for LS1
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
nathaninwa
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Re: LS Engine With MS3X Not Pulling Up Top

Post by nathaninwa »

Can you post a datalog of a pull as well. Have you verified timing, not in the software but mechanically on the engine? I've seen trigger offsets almost to 7* to get timing correct
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billr
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Re: LS Engine With MS3X Not Pulling Up Top

Post by billr »

Post a run log (MSL)

Is this a 5.3 running E85, as you stated; or a 5.7 running gasoline, as the req_fuel is calculated for?
ffr3247r
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Re: LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

Its a 5.3 bored to 5.7 on E85. SO he has required fuel setup for gasoline?

It has been verified with a piston stop and was 4 degrees off. That was corrected in the trigger offset.
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
billr
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Re: LS Engine With MS3X Not Pulling Up Top

Post by billr »

Yes, 14.7 was used for stoic in "req_fuel" calc, for E85 it should be more like 10, I think.

The only way to verify spark timing is with a strobe light. The piston stop lets you get the reference marks on the crank correct, but tells nothing about spark timing.
ffr3247r
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Re: LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

The required fuel number is something we have discussed in the past. We are the only ones around this area running MS so info is not easy to come by.

So help me understand what happens if the req fuel is incorrect. Are his VE tables lean or rich. I am also running his tune on my car but I have no issues pulling all the way to 7200rpm. His car has trouble with anything above 14psi on boost.

Timing was verified with a light after he found out he was off 4 degrees.

Thanks for the help guys
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
badboss351
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Re: LS Engine With MS3X Not Pulling Up Top

Post by badboss351 »

Yall should have a SBF in them, then you wouldn't have these problems!!! :lol: :msq: We are questioning something in the ms3 itself, or possibly valve float(but he does have upgraded dbl springs).
nathaninwa
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Re: LS Engine With MS3X Not Pulling Up Top

Post by nathaninwa »

It's beneficial to have reqfuel correct. But with it low, the fuel tables values can be made higher to make up for it. The scaling will just no off is all. What do the logs say, is he running lean under boost?

Get a log posted
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ffr3247r
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Re: LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

I'm trying to attach one but keeps telling me board attachment quota reached.

What do I need to do
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
ffr3247r
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Re: LS Engine With MS3X Not Pulling Up Top

Post by ffr3247r »

Data Log File
66 Mustang Turbo 6.0 LS on MS3X 80lb Deka injectors Tunerstudio Ultra and MS3 1.5.1
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