over valved?

[Kyle]

i found a set of dart iron eagle heads for cheap with 230cc intake runners with 2.08/1.60 valves... is that too big of an intake valve for a mild build 406? with the valves even fit with dished pistons with the intake valve being so big? or would it just be better to stick with a smaller valved head cuz its more of a daily driven motor?

[Broncoholic]

i found a set of dart iron eagle heads for cheap with 230cc intake runners with 2.08/1.60 valves... is that too big of an intake valve for a mild build 406? with the valves even fit with dished pistons with the intake valve being so big? or would it just be better to stick with a smaller valved head cuz its more of a daily driven motor?

406 cam tells the tail

[Jjay78]

the valves will fit, but intake runners that big are gonna have a really low velocity so your bottem end is gonna be spongy till you get your rpms up enough to keep that volume moving. those are gonna wana make their power from like 3800 rpm up with a 406. personally i'd try to find heads with smaller runners, weather you get 2.02's 2.05's or 2.08 intake, find something closer to 180-200 cc intake runners man, they'll still rev up good, but you won't get as bad of a lag with lower rpm's

[Kyle]

the valves will fit, but intake runners that big are gonna have a really low velocity so your bottem end is gonna be spongy till you get your rpms up enough to keep that volume moving. those are gonna wana make their power from like 3800 rpm up with a 406. personally i'd try to find heads with smaller runners, weather you get 2.02's 2.05's or 2.08 intake, find something closer to 180-200 cc intake runners man, they'll still rev up good, but you won't get as bad of a lag with lower rpm's

my goal is to make low end power tho... so thats def some good info!

[Kyle]

would vortec heads be a better choice then?

[J.C.]

if they are cheep enuf id buy them up. keep them for later

[84Chevy]

would vortec heads be a better choice then?

ive been happy with mine so far!

[Jjay78]

if you got the money for any heads you want then get the afr190's man, their some of the best flowing heads on the market

[Swampthing]

you didn;t mention chamber cc tho  that determines compression.. and seriously affects how the motor runs


also.. the older 202 heads are still out there relatively cheap..  i have a set just setting on the shelf.. all my daily drivers are 95 and newer so i can't use them. and i only use dart heads on my toys...

[Kyle]

what about some world sportsman heads?

[Swampthing]

good heads

[old school truck dude]

Them 208s would NEVER pass a gas station. Might want to re-think that if youre gonna be on the street, jmo 

[Kyle]

Them 208s would NEVER pass a gas station. Might want to re-think that if youre gonna be on the street, jmo 

stick with somethin more of like the vortec heads then? or 2.02 valves?

[7d9_z28]

vortecs or camelhumps

[old school truck dude]

041 is the last 3 digits of the casting number for the "camelhump" "double hump" "fuelie" heads. 202 knuckleport, 58cc chambers - RV type of cam ground for low-end torque, that would work ok and still have a little gas mileage..

[the harvester]

look into the dart iron eagle head it is a very good head for the price

[Kyle]

041 is the last 3 digits of the casting number for the "camelhump" "double hump" "fuelie" heads. 202 knuckleport, 58cc chambers - RV type of cam ground for low-end torque, that would work ok and still have a little gas mileage..

58cc chambers?! CR much? lol thatd be in the 11:1s easy for that motor.....