Which Cam?

[QUICK STORM]

i have ported and polished vortec heads along with the rpm single turbo headers, just wondering what cam i should go with?

 

[nightdiver]

Re: Which Cam?

custom hydro 276/276 or 280/280 with max lift. DONT get a cam with more duration @ exhaust

 

[QUICK STORM]

Re: Which Cam?

where would i get a cam like this, i have a KB turbo cam(450/450 lift and 260/260 dur.) in the truck already

 

[sy#2921]

Re: Which Cam?

why wouldnt a split duration cam work?

 

[QUICK STORM]

Re: Which Cam?

any ideas

 

[sy#2921]

Re: Which Cam?

i know most all cam makers will do a custom grind for little to no extra cost. I would call up comp cams and tell them what you want and they should be able to make it no problem

 

[QUICK STORM]

Re: Which Cam?

i know most all cam makers will do a custom grind for little to no extra cost. I would call up comp cams and tell them what you want and they should be able to make it no problem

what should i ask for lift/duration wise?

 

[sy#2921]

Re: Which Cam?

what kind of valve springs and rockers are you using on those vortec's? that will dictate how much lift you can go with and i will assume that the cam you have now the specs on the duration are at .0006 lift not .050 lift. what kind of stall is in the truck?

But i would call and ask for .500-.525 lift and 280 duration like the 09-430-8 or C6 280H-R10 ( same cam different part numbers) but i would ask the seperation to be 112 or 114 to make the cam a little more streetable and give ya a broader power band.

 

[QUICK STORM]

Re: Which Cam?

what kind of valve springs and rockers are you using on those vortec's? that will dictate how much lift you can go with and i will assume that the cam you have now the specs on the duration are at .0006 lift not .050 lift. what kind of stall is in the truck?

But i would call and ask for .500-.525 lift and 280 duration like the 09-430-8 or C6 280H-R10 ( same cam different part numbers) but i would ask the seperation to be 112 or 114 to make the cam a little more streetable and give ya a broader power band.

they are the springs that come with the heads and the lfters and rockers mike recommended.

stall is 2800

so this cam would be a 430? i checked comp cams site and whats the differnece between the computer controlled cams and the other ones?

 

[sy#2921]

Re: Which Cam?

i would ask mike what the springs are good to on lift then use that number when you call comp cams but i would do a 113 lsa if comp cams would do that with the 2800 stall with 280/280 duration and that would be one nice cam for the truck. what turbo are you going to run?

 

[QUICK STORM]

Re: Which Cam?

i would ask mike what the springs are good to on lift then use that number when you call comp cams but i would do a 113 lsa if comp cams would do that with the 2800 stall with 280/280 duration and that would be one nice cam for the truck. what turbo are you going to run?

the truck came with a PTE60, whats the 113lsa?

ps. i have 50#s, KB a2a, 58mm TB, 1.6 rockers etc..

and i will talk to mike

 

[sy#2921]

Re: Which Cam?

the 113 lsa is the lobe seperation angle which i have always known as the determining factor on power band and also idle quality the smaller the number the shorter the powerband and also the harder it "cams" or lopes at idle. I wouldnt order the 430 cam cause it has the 110 lsa which might be a little low for a streetable cam i was just saying when ordering say you want a 430 cam but with 113lsa. However with the 1.6 rockers you dont need as much gross lift on the cam. I would say .475 max

 

[jwaller]

Re: Which Cam?

I've got some custom vortec cams and can get one to work with mike's heads. run you about $300. 114.1 lsa and split durations for our turbo motors.

 

[nightdiver]

Re: Which Cam?

why wouldnt a split duration cam work?

its called reversion.
turbos got exhaust back pressure .if the exhaust valve is open when the intake opens the turbo is fighting against the exhaust back pressure trying to fill the cylinder. Some guys prefer a bit smaller cam @ exhaust @.50.
I got a new cam like this moded to run with the old style chain.
specs are adv. 275/276 @.006 . 224/220 @ .50 . LB 114.0 . lift is .502 /.513

 

[sy#2921]

Re: Which Cam?

makes sense now i wasnt thinking about it correctly

 

[QUICK STORM]

Re: Which Cam?

i think i'm going to go with a 422

 

[jwaller]

Re: Which Cam?

422 is a good choice for your package and readily available.

 

[QUICK STORM]

Re: Which Cam?

I've got some custom vortec cams and can get one to work with mike's heads. run you about $300. 114.1 lsa and split durations for our turbo motors.

can you give me some more info?

 

[Don W.]

Re: Which Cam?

Yo Brandon, Does this mean you're actually working on that thing?:tup: I sure hope so. Looking forward to seeing you at Infineon this year.

 

[QUICK STORM]

Re: Which Cam?

Yo Brandon, Does this mean you're actually working on that thing?:tup: I sure hope so. Looking forward to seeing you at Infineon this year.

yep, just stocking up on some parts. will be a whole different truck:tup: