Anyone running EFI with FRPP SCJ heads?

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Anyone running EFI with FRPP SCJ heads? Empty Anyone running EFI with FRPP SCJ heads?

Post  t120r on November 2nd 2019, 1:43 pm

I'm playing around with my megasquirt ignition map and I have 12 degrees initial and 30 degrees total all in by 3000rpm. I've attached a screenshot of my ignition map. As it's NA, you can ignore anything above 100kpa.

I'd love to see other's maps to compare to mine.

Anyone running EFI with FRPP SCJ heads? 429_sc10

t120r

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Post  wickettoby1 on November 2nd 2019, 5:31 pm

Can you provide all of the engine specs?

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Post  t120r on November 2nd 2019, 9:09 pm

wickettoby1 wrote:Can you provide all of the engine specs?

Sure. 429 bored 0.060" over
Flat top Diamond Forged pistons (11:1 or so compresion)
FRPP SCJ heads (unported)
Edelbrock RPM Air Gap intake
MSD LS3 coils
Comp XR274R solid roller. Lift:.626/.654 dur: 235.6/246.9 @0.050

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Post  wickettoby1 on November 3rd 2019, 1:12 pm

12 initial is quite conservative, I bet the engine would like 15-18 as long as it doesn’t effect engine cranking but every combo is different.

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Post  t120r on November 3rd 2019, 11:48 pm

wickettoby1 wrote:12 initial is quite conservative, I bet the engine would like 15-18 as long as it doesn’t effect engine cranking but every combo is different.

Everything I've read about these heads says you don't need as much timing due to the chamber design. Most of the SCJ threads I've read have 12 to 14 degrees initial and 28 to 30 all in by 3000.

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