305 with vortec heads and hot cam??? - Third Generation F-Body Message Boards

adm030 · 10-13-2009, 12:19 PM

I was going to build a 350 but my 305 is fine iit was rebuilt a few years ago So I'm just going to build the 305 with what I wanted for the 350 and when it blows up I do the swap then. Alright this is what I want to do

062 Vortec heads milled to 58cc
Lt4 Hotcam 218/228 with the 1.6 roller rockers
any aftermarket brand intake 1500-6500 rpm dual plane
tuned with ostrich
walbro fuel pump

What type of tbi would I need to run this cfm wise and injectors?
Or could I just put bigger injectors in the tbi I have now?
Also How big of a stall would I need? The one I have now is 1900-2100
anything wlse that you know or think of let me know I know the hot cam is extreme but it can be done and fast 355 has gone bigger so I'm sure I can tune this and it should be a pretty strong motor. Thanks

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Drumer919 · 10-13-2009, 02:03 PM

Your going to need other work to the vortec's to run the LT4 cam, max lift on vortecs is about .480. As for injectors the 65lb/hr (350) will be plenty as will your stock throttle body.

adm030 · 10-13-2009, 02:47 PM

Quote:

Originally Posted by Drumer919

Your going to need other work to the vortec's to run the LT4 cam, max lift on vortecs is about .480. As for injectors the 65lb/hr (350) will be plenty as will your stock throttle body.

The heads will be set up for the cam at the engine shop. What psi would you set the injectors for?

Ronny · 10-13-2009, 05:39 PM

www.sdparts.com

They sell new vortec heads modded for the higher lift.

FIC says 65 lbs injs at 29 lbs support 350 HP 300 HP comes to 22 lbs.

adm030 · 10-13-2009, 06:23 PM

I already got a set of bare heads for free so I just need to assemble them. I need to find someone with a desktop dyno so I'd know kinda close how much hp it will put down I figure it should be somewhere close to 260 to the wheels. So I'll just have to go b/t 22 and 29 and see what it likes.