RBeyer

I am freshening and upgrading a bit. I have a 454 Mag 60 over, 7lb boost ProCharged M3 SC, Merc ignition, and the following additional. Edelbrock aluminum heads #61559 2.50 intake 1.90 exhaust, long runners are 320 short are 310, 118 CC, compression is 10:1. Cam is 236/238 @ 50 112 LC lift is 595 total custom grind with 1.8 rockers full hydraulic roller. I am currently running 50lb injectors. Will these work or should I go with 60lb injectors.
EMI Thunder exhaust. any thing besides the the reflash and possible injector change am I'm missing anything.
Bob

kennyo

50# should be okay. It all depends on how your ecm is mapped.

Mr Gadgets

Do you have any idea what horse power was before making the improvments? And what about % of duty cylce on the old setup? What is the fuel PSI?
If you dont have a way of looking at duty cycle, then hp and psi #'s will help.

Bryan Rose

7 LBS on a 10-1 Motor seems on the high side .....Also 2.50 is a huge intake valve ...sure it is not 2.30?
Better get lots of fuel to it for sure.....

Bryan

GPM

50 lb injectors, base fuel pressure set at 43.5, boost referenced regulator, 700 hp.

niceguy

That is surely a misprint... 2.5 intake valve on a 320 head? Highly doubt that.... the valves wouldn't clear the bore on a 454.

I think 10:1 with that much boost is gonna be really pushing it with 7 lbs on pump gas. Watch closely for detonation!!!

I think GPM has a pretty good baseline.

RBeyer

Estimations were in the low 700's prior, Don't have duty cycle. Fuel pressure at WOT is 78 to 80.
Bob

RBeyer

These are the actual speck:
Edelbrock 61559 - Edelbrock BB-Chevy Performer RPM Aluminum Cylinder Heads



BB-Chevy Performer RPM 454-R Marine Aluminum Cylinder Head
315cc/300cc (Long/Short) Rectangle Ports
118cc Comb. Chambers
2.250''/1.890'' Valves
7/16'' Rocker Studs
Sold Individually

They have been ported significanlt to the 320 -310 runner. Every thing else is correct.

GPM

why so high? what was the pressure at idle?

RBeyer

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