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I have a 306 with World Product Cast iron heads , f cam and gt40 tubular intake, adding a V-2 S trim with 39lb injectors and arp head studs and just wondering what u guys think it should make on a safe tune? And if anyone has ran a strim with cast iron heads and how well it’ held up, thanks in advance!
 

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I have a 306 with World Product Cast iron heads , f cam and gt40 tubular intake, adding a V-2 S trim with 39lb injectors and arp head studs and just wondering what u guys think it should make on a safe tune? And if anyone has ran a strim with cast iron heads and how well it’ held up, thanks in advance!
My guess with say 10-12lbs boost...425–450rwhp
 

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mine made 456 corrected with the afr 165s at 9 psi with the smaller sci....I doubt you will get away with as much timing as you would an aluminum head so, 425 is probably a good guess.
 

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low 400s cause of the heads... more with water injection
 

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low 400hp

what size fuel pump? the heads and injectors might hold you back .
e 303 would be better choice if you go to better heads


if it was me at least 42#injectors and 309 - 340lph in tank pump.
 
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