Accidental k30

[obijuank5]

So I r engine dumb but learning alot and very quickly. Looking for cam guidance.

Decent driving, mild lope, more emphasis on torque and under 5000 rpm.
Nv4500 and 4.56 with 39" bawgies. Calculates to 2050 at 70mph. May never use 5th.


Am I interpreting the 224 and 230 duration to be a cooler sounding cam than 212 and 218 which is closer to stock idle characteristics?

https://www.summitracing.com/parts/cca-k01-417-8

I'm looking for a comp cams kit like this, which is pretty all inclusive.


OR hit me with a better cam that I can slam I to the stock long block. I'm all ears.

 

[beags86]

Lots of stuff to consider in cam choice. Your runn manual so are you going to run headers or manifolds. Single or dual plain. And carb or efi?

From your first post I would say this one.

 

[Bent77]

Couldn't get that link to open @beags86

 

[obijuank5]

I dont know those answers, but dual plane and headers are in the general path.
Allegedly the OEM manifolds are less sucky of the bunch so they could be fine. And I sure do like the fitment.

Also the link doesnt work but why flat tappet on a roller motor?

 

[beags86]

I dont know those answers, but dual plane and headers are in the general path.
Allegedly the OEM manifolds are less sucky of the bunch so they could be fine. And I sure do like the fitment.

Also the link doesnt work but why flat tappet on a roller motor?

Shit. Sorry. Let me look some more I just clicked on the wrong box when doing my search.. ...

 

[Fastereddie]

I just saw this while looking around. Might help you out some.


http://www.superchevy.com/how-to/engines-drivetrain/1506-how-to-pick-up-big-power-on-a-junkyard-454-with-simple-cam-swap

 

[Bent77]

I dont know those answers, but dual plane and headers are in the general path.
Allegedly the OEM manifolds are less sucky of the bunch so they could be fine. And I sure do like the fitment.

Also the link doesnt work but why flat tappet on a roller motor?

Cost, but I wouldnt give that up. Same lift/duration on a hyd roller should add more low end

Heres a GM crate using close to with a Hyd Roller. THey rate it at 438HP

 

[beags86]

So the bitch of cam selection of a l29 is that when you spec put a gen 6 bbc they want to sell you a cam that works with the factory MPFI. Your probably running a carb. You want to utilize the quick ramp profile of the roller but don't need to worry about keeping the factory efi happy.

So if you spec the older gen 4 stuff, retro fit, you can can get a cam thay doesn't worry about MFPI and ECU.
So this is probably a choice you probably want to look at. In this range. I am trying to be conservative. If it was was I would probably put 2 size bigger of cam in it. But thats me.

 

[Bent77]

@obijuank5

skip to 2:00 to skip the fluff. Hyd flat tappet cam

 

[beags86]

@obijuank5

skip to 2:00 to skip the fluff. Hyd flat tappet cam

Joe on horsepower is the shit.

 

[obijuank5]

I just saw this while looking around. Might help you out some.


http://www.superchevy.com/how-to/en...-power-on-a-junkyard-454-with-simple-cam-swap

I have studied that a bit. According to the internet, 540 is the max lift you should do with the OEM head configuration. Marginal, but I'm gonna be a little conservative and go on the other side of fitment.

 

[Bent77]

So the bitch of cam selection of a l29 is that when you spec put a gen 6 bbc they want to sell you a cam that works with the factory MPFI. Your probably running a carb. You want to utilize the quick ramp profile of the roller but don't need to worry about keeping the factory efi happy.

So if you spec the older gen 4 stuff, retro fit, you can can get a cam thay doesn't worry about MFPI and ECU.
So this is probably a choice you probably want to look at. In this range. I am trying to be conservative. If it was was I would probably put 2 size bigger of cam in it. But thats me.

View attachment 350672

Was told someplace in there the lift exceeds the rocker stud happy spot...
Needs screw in studs attached to bigger heads

 

[beags86]

I have studied that a bit. According to the internet, 540 is the max lift you should do with the OEM head configuration. Marginal, but I'm gonna be a little conservative and go on the other side of fitment.

Ok thats also good information to know. You just want to stab a cam, no messing with the springs?

 

[obijuank5]

I just dont want to machine anything or have surprises. I'm good with a cam and spring swap. I am cool with everything included in that comp kit.
Pushrod and adjustable rocker studs with beehives and a new timing chain set.
I'd like to keep the stock valves.

 

[Bent77]

This is the cam I would pick
https://www.summitracing.com/parts/NAL-24502611

parts list from that GM crate so you can match springs
https://www.chevrolet.com/performance-parts/crate-engines/big-block/454-ho

 

[beags86]

This is the cam I would pick
https://www.summitracing.com/parts/NAL-24502611

parts list from that GM crate so you can match springs
https://www.chevrolet.com/performance-parts/crate-engines/big-block/454-ho

Come on mark. Dig down into the drag racing past.... you know you want more cam then that!. Lol

 

[Bent77]

Come on mark. Dig down into the drag racing past.... you know you want more cam then that!. Lol

You can't handle the truth...


When I built one on paper before buying the crate, both my wallet and my rear axle were whimpering

Brodix heads on an L29 block, 600 lift and 245/255 duration at 50. Street motor...

 

[beags86]

You can't handle the truth...


When I built one on paper before buying the crate, both my wallet and my rear axle were whimpering

Brodix heads on an L29 block, 600 lift and 245/255 duration at 50. Street motor...

You know what kind of brodix heads you were looking at? Oval, rectangle?

 

[Bent77]

You know what kind of brodix heads you were looking at? Oval, rectangle?

Don't remember, everything flows more than factory heads though. They weren't full race, but had smaller chambers for sure

 

[obijuank5]

These are 99cc which is 9.3:1.

I hear thats.... boost friendly