vortec valve question

[NecroWolf]

i called a local machine shop to see about getting my heads cut for larger valves and he told me i was wasting my time, he'd cut them but they had as big as they'd take? is he telling me something i should know or is he not knowing something?

 

[MRKING]

Re: vortec valve question

2.05/1.60 valves dont come stock and I theres no arguing that they dont fit . You just called the wrong shop .

 

[James Thomas]

Re: vortec valve question

Prolly thinking that A. it's for a N/A engine and or B. not going to do any other mods (cam - porting etc.). It's worth it, do it. I think 2.02 is big as I would go. I know a lot of guys / builders do the 2.05 but I have seen alot of them crack in the seats also. Just my :2cents:

_________
James

 

[sharkbait]

Re: vortec valve question

i had a naturaly aspirated vortec 4.3 in my awd astrovan. the motor had custom cam, 10:5:1, 202/160 valves, studed heads, etc. and for a 4600lb "mini van" it ran pretty good. once the big barge started moving, it really hauled.

i plan on using those heads on my ty motor. its a no brainer that bigger valves will flow more. but you need to get more fuel/air in to actually take advantage of them. and then the motor has to exhaust that increased fuel/air.

are you planning on doing bigger injectors, turbo, cam etc?

 

[NecroWolf]

Re: vortec valve question

go 50lb and 65lb inj on hand working on getting a bigger turbo

 

[sharkbait]

Re: vortec valve question

cool