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Pampered-Z · 12-15-2009, 09:24 AM

I built my shortblock with a target of 750 HP, I went with a Callies crank and Manley rods, pistons are JEs. I hear all good things about Lunati parts as well.

If you plan to run all out N/A then you might want to go at least 42s, or maybe a bit bigger? 42lbs are good to about 500-525HP based on the Fuel pressure. I'm 385CI, SC'd and running 42lbs, at 480RWHP I'm in the low 80% duty cycles which is about as far as you want to push injectors. More boost is going to require larger injectors. So I'm thinking that a 408 might need a bit more fuel?

12-15-2009, 09:24 AM	#7
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	I built my shortblock with a target of 750 HP, I went with a Callies crank and Manley rods, pistons are JEs. I hear all good things about Lunati parts as well. If you plan to run all out N/A then you might want to go at least 42s, or maybe a bit bigger? 42lbs are good to about 500-525HP based on the Fuel pressure. I'm 385CI, SC'd and running 42lbs, at 480RWHP I'm in the low 80% duty cycles which is about as far as you want to push injectors. More boost is going to require larger injectors. So I'm thinking that a 408 might need a bit more fuel? __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!! Last edited by Pampered-Z; 12-15-2009 at 09:26 AM.