RichardC

Can anyone please give me some feedback on the GM Vortech Engine.
How do these compare to the Mercury Racing 500 / 525 efi engines.
How reliable / economical are they?
Any help will be greatly appreciated. Thanks in advance

innerrage

iTrader: (1)

i run a 350ho vortec with some add ons and its 5500rpms 400hp and its been 8 years and still runs strong

dereknkathy

i assume you mean big block vortec? vortec heads are an upgrade over stock 330 hp round port heads, but it isn't a big power motor.

RichardC

Yes - Big block vortec engine.
How easy is it to increase HP and Torque from the standard engine.
We are looking at over 500hp

ezstriper

not even close...high torque vs high performance

dereknkathy

a vortec is a large oval port head. has a large hump in intake port to increase swirl. they were designed as an improvement over TBI peanut port heads. from what i read, you are looking at a lot of port work to make them decent. hand grinding iron heads is time consuming. if you are paying somebody who knows what he is doing, instead of buying a grinder and a copy of Head Porting for Dummies, (i doubt book actually exists) then it will get expensive. you want 500 hp, aftermarket heads or worked rect ports. i don't think vortec motors use forged cranks-pistons. so there won't be much left of orig engine once build is done...