355 stroker

[Heeey!!]

hi guys,
just wondering if anyone could help me with deciding on a few things...
i have a 308 5L stroked to 355 with raised compression 9.75:1 forgies, ported heads with bigger intake valves, roller rockers stock ratio, double row timing set in a vr commodore,

just wanting to know what size fuel injectors would be a good upgrade (cc) and what pump would be good, is it worth getting a dual throttle manifold and what else would you recon would be worth doing to the engine to get great power keeping it naturally aspirated.

cheers

[Boonz]

very similar configuration to mine.... im running 28lb cream tops,super 6 fuel pump with a torque power dual plane manifold and 4 barrel throttle body
what cam do you ahve?

[Not_An_Abba_Fan]

Also, just to be pedantic, you had a 304, not a 308.....

[Heeey!!]

i actually dn't hav the engine yet and it will be in pieces for me to put together in 2 days, the cam so far is to suit the kit but im gna change it to suit the tune to get best results....
oh i thought it was a 308, is that vs onwards?

[Boonz]

if your lookin at forced induction then it might be worth looking at a boost friendly cam and a group A style manifold because it is easier,cheaper and neater to setup for similar power gains

[Heeey!!]

nah wanna keep n/a but thanx for the suggestion.

[Not_An_Abba_Fan]

Is the engine running out of fuel now where ever it is? I'd go a cam upgrade as well as injectors and pump.

When Holden changed to the black motor they were all 304's from there. VK on.

[Boonz]

ok then, any reason why you went low comp and forgies?

[v8_bomberdore]

i think multi point magna injectors should be ok with what u have a and a walbro intank pump should be heaps, i would definetly go the torque power manifold with the 1000cfm throttle body and if u want have your air cleaner just sticking out the bonnet looks tuff as

[Heeey!!]

isnt 9.75:1 comp a lil raised... whats wrong with forgies?
i'll look into that manifold and injectors thanx.

[Boonz]

nah just curious cos most peop[le who build a motor with forgies are lookin to throw some extra pressure in the cylinders... ive built my motor with forgies and to 9.8:1 comp cos im gonna put a blower on it. all i gotta do when i put the blower on is swap the head gaskets to a 1.6mm thick one to drop the comp a bit more...

most guys who build a N/A motor have the comp around 10.2-10.5:1 cos thats where they start making the big numbers

dont get me wrong 9.75:1 is raised, and still makes heaps of torque but doesnt make as good power as the higher comp motors

[Heeey!!]

oh ok fair enuf, i think for my application my comp will b enuf, do you know roughly wat ur comp will b with the thicker headgasket, just to keep in mind incase i wanna go forced induc l8r...

[Boonz]

should drop it to around 9:1 ish, which is nice for about 12 psi safely... which would be insanely stupid power for a live axle ute