cam size

[blkty]

ive got a 422 comp cam some guys are telling me it doesnt match my heads. can anybody tell me what will happen if i use this cam. ive been told to go with the 412 or 415. dont know what to do heres what i got so far STOCK HEADS
THREADED STUDS
2.02,1.60 VALVES
1.5 ROLLER ROCKERS
4-BOLT
EAGLE RODS
JE PISTONS

looking for an answer on witch one to use any suggestions or input would be appreciated. i wanna try and get this right before i put it back together
thanks blkty

 

[Bad Ass Black Trucks]

Re: cam size

Someone else in Dayton, OH! Good to see I'm not the only one. You downtown or in the burbs? I'm in Beavercreek.

With your current combo I would say get a 412. That cam is aggressive and I would have to agree that you would be choking your motor by trying to flow that much through stock heads. To make use of that cam you would need some heavily ported L35's or Vortecs.

What are you looking to do with your truck? Looks like you have already invested some money in your stock heads. From what I hear you can't get a whole lot of flow through em even with porting. Your bottom end looks to be stout, so you may want to upgrade heads while you are in there.

 

[supersports10]

Re: cam size

Someone else in Dayton, OH! Good to see I'm not the only one. You downtown or in the burbs? I'm in Beavercreek.

With your current combo I would say get a 412. That cam is aggressive and I would have to agree that you would be choking your motor by trying to flow that much through stock heads. To make use of that cam you would need some heavily ported L35's or Vortecs.

What are you looking to do with your truck? Looks like you have already invested some money in your stock heads. From what I hear you can't get a whole lot of flow through em even with porting. Your bottom end looks to be stout, so you may want to upgrade heads while you are in there.

agreed!! x2:tup: 110% right on the money.
the stock heads blow, even when ported to the max, they wont touch a stock vortec head.

the 422 is an agressive cam that will overwhelm the stock heads.
the 422 is gonna require a 3000 + stall, to get any good size of a turbo to spool. what turbo you running???
honestly if you wanna keep those stock heads, use the sonoma gt cam .440 / .440 lift.
would match them way better.
with 1:6 ratio rockers, the cam would be .470/ .470

on a side note of you do sell the 422 i might be interested in it.

 

[jwaller]

Re: cam size

your wasting your time with anything but a stock cam on stock heads. you have to machine the heads or use special valves and locks to even get the clearances close to right. might as well spend that $ on vortecs and you would have a set by the time you mess with stockers to accept a cam that they cant even use.

 

[James Thomas]

Re: cam size

The stock heads even with the larger valves you have are about what John said above. If you have a specific reason for not wanting to go Vortec (looks, extra cost of modding the lower intake, not wanting to screw up a good stock intake etc), there are several head porters in the country that can equal if not surpass mild ported Vortec's Mckenzie Motor sports is one and a damned good one, he rocks (got the flow sheets to prove it from the last 15 sets of his heads)!

Mind you, the cost is not all that much different from doing Vortec's other than the intake mod but he can do them. Many porters don't want to spend the time or they are not 100% full time just doing heads and they can make better money on other types of work but Todd only does heads and knows how to make them work. All that aside, the Vortec's are a better chamber design and a better platform to start with if you don't mind the mod.

My :2cents: ? Go ahead and do the Vortec swap, John & Mike both do nice packages. Keep your 422 and you will be a happy camper with some Meth and 52/54 or larger turbo. If you go small cam and stock heads now, you will prolly be wanting to upgrade again in the future :tdown:

_________
James

 

[dgoodhue]

Re: cam size

your wasting your time with anything but a stock cam on stock heads. you have to machine the heads or use special valves and locks to even get the clearances close to right. might as well spend that $ on vortecs and you would have a set by the time you mess with stockers to accept a cam that they cant even use.

I think a stock set of heads could even benefit from a mild cam, because the stock cam is that anemic. If you could find one the more agressive factory cams it would be an upgrade. sytyguy has post with a list camshaft, try a search on.

Anyways I think your wasting your time stick a set of 2.02/1.60 valves in the stock heads. The valve size isn't the problem with them. The cost of the valves, machine work for the seats, and valve job would be better off putting toward Vortec Conversion or buying a set of L35 heads.

 

[blkty]

Re: cam size

thanks for all the input guys i really appreciate it the heads are allready done so i guess i will use them just got to get the best cam for my application
thanks again blkty