Building pull truck have ?

Groomzybanshee · Dec 22, 2014

OBS-Addiction97 said:
Wouldn't he get more benefit for a stage 2 cam?

Depends. Who's cam I've seen a truck with some ones said "cam" not be able to break 450 hp on the dyno with a big single and 400/400s. Just because it's a stage 2 cam don't mean it works.

lincolnlocker · Dec 22, 2014

Groomzybanshee said:
Depends. Who's cam I've seen a truck with some ones said "cam" not be able to break 450 hp on the dyno with a big single and 400/400s. Just because it's a stage 2 cam don't mean it works.

dyno's are not a transfer sled...

live life full throttle

ryanss22 · Dec 22, 2014

Make sure your new 475 turbo has a big exd turbine like a 89,91,96.. the 81,83 os just to small for a 7
3 good performance with big inj. A 1.0-1.10 at would be good to.

smokinstroker92 · Dec 22, 2014

Groomzybanshee said:
Stock cam. It works

So your saying on that since my ported heads flow 40 cfm more at .500 lift compared to the stock .400 lift I would see no benefit?? In a turbo application the results seen on a flow bench are amplified from the greater pressure differentials. A proper designed cam will increase performance by taking advantage of the increased lift nd quicker ramp rates. As long as the cam doesn't get crazy with overlap decreasing dynamic compression you will see increases across the board not to mention better spool from increases exhaust velocity. Cams DO work

cbf9703 · Dec 22, 2014

smokinstroker92 said:
So your saying on that since my ported heads flow 40 cfm more at .500 lift compared to the stock .400 lift I would see no benefit?? In a turbo application the results seen on a flow bench are amplified from the greater pressure differentials. A proper designed cam will increase performance by taking advantage of the increased lift nd quicker ramp rates. As long as the cam doesn't get crazy with overlap decreasing dynamic compression you will see increases across the board not to mention better spool from increases exhaust velocity. Cams DO work

Agreed that cams DO work, but not all 'performance' cams work equally or equally well across the power band. There is cam testing out there that is a testament to that.

smokinstroker92 · Dec 22, 2014

cbf9703 said:
Agreed that cams DO work, but not all 'performance' cams work equally or equally well across the power band. There is cam testing out there that is a testament to that.

I agree completely. Choose your cam wisely

Groomzybanshee · Dec 22, 2014

lincolnlocker said:
dyno's are not a transfer sled...

live life full throttle

Doesn't matter truck was building boost just fine. Truck wouldn't move the sled out of its own way.

Groomzybanshee · Dec 22, 2014

smokinstroker92 said:
So your saying on that since my ported heads flow 40 cfm more at .500 lift compared to the stock .400 lift I would see no benefit?? In a turbo application the results seen on a flow bench are amplified from the greater pressure differentials. A proper designed cam will increase performance by taking advantage of the increased lift nd quicker ramp rates. As long as the cam doesn't get crazy with overlap decreasing dynamic compression you will see increases across the board not to mention better spool from increases exhaust velocity. Cams DO work

I agree but who has proved there cams work other than swamps?.... Nobody.

lincolnlocker · Dec 22, 2014

Groomzybanshee said:
Doesn't matter truck was building boost just fine. Truck wouldn't move the sled out of its own way.

that just doesnt make sense.. what else was wrong with it?

live life full throttle

Groomzybanshee · Dec 22, 2014

lincolnlocker said:
that just doesnt make sense.. what else was wrong with it?

live life full throttle

Don't know. I watched a said tuner try and live tune it for several hours. They started out at 300. Then about 40 dyno pulls and some timing later they got to 450. Lol

Not saying cams dont work but a aftermarket cam if Not spec'd right can hurt you a lot more than the 20 hp you may gain from one.

lincolnlocker · Dec 22, 2014

Groomzybanshee said:
Don't know. I watched a said tuner try and live tune it for several hours. They started out at 300. Then about 40 dyno pulls and some timing later they got to 450. Lol

Not saying cams dont work but a aftermarket cam if Not spec'd right can hurt you a lot more than the 20 hp you may gain from one.

10-4

live life full throttle

turner97 · Dec 22, 2014

I m looking at swamps or gear heads pulling cam

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smokinstroker92 · Dec 22, 2014

My cam seems to be working fine in my application when properly spec'd to compliment my head flow

https://www.youtube.com/watch?v=geehN4ZNVJ4 first hook on new motor
https://www.youtube.com/watch?v=noujwzkNzZI dont mind the slight hop

lincolnlocker · Dec 22, 2014

smokinstroker92 said:
My cam seems to be working fine in my application when properly spec'd to compliment my head flow

https://www.youtube.com/watch?v=geehN4ZNVJ4 first hook on new motor
https://www.youtube.com/watch?v=noujwzkNzZI dont mind the slight hop

that thing sounds pissed off!

live life full throttle

under construction · Dec 22, 2014

Who's cam? Sound damn good!!

Magnum PD · Dec 22, 2014

And had good speed on the 2nd vid

elrodalexander73 · Dec 22, 2014

I've done some pretty deep research now, I can see how a flow bench, knowing what boost pressure you might possibly be running, and how much fuel you will be using will determine what a duration and lift will be needed. I could see how too much lift can cause a lack of velocity and port swirl where as a duration and advancing the intake event to keep overlap at bay. Overlap causes pressure differentials which Detroit Diesel and Cat in the early days used for cold weather start up and emmisions... Which is exactly how the stock cam was engineered. I don't think enough development has played in yet, and plus has anyone machined a cam gear and changed the timing 2/3/4 degrees yet. With the rule of thumb as retarded cam timing making topend power and advanced making more low end, I wonder what still is in store for the heui dinosaur.

smokinstroker92 · Dec 23, 2014

under construction said:
Who's cam? Sound damn good!!

My own design. Thanks man

Magnum PD said:
And had good speed on the 2nd vid

Yes alot of spinning in the first video, actually hooked in the second

smokinstroker92 · Dec 23, 2014

elrodalexander73 said:
I've done some pretty deep research now, I can see how a flow bench, knowing what boost pressure you might possibly be running, and how much fuel you will be using will determine what a duration and lift will be needed. I could see how too much lift can cause a lack of velocity and port swirl where as a duration and advancing the intake event to keep overlap at bay. Overlap causes pressure differentials which Detroit Diesel and Cat in the early days used for cold weather start up and emmisions... Which is exactly how the stock cam was engineered. I don't think enough development has played in yet, and plus has anyone machined a cam gear and changed the timing 2/3/4 degrees yet. With the rule of thumb as retarded cam timing making topend power and advanced making more low end, I wonder what still is in store for the heui dinosaur.

You are exactly right the stock cam was designed for a motor that ran low rpms while proving good cold starts and emmisions. All aspects of your fueling, operating rpms, and airflow should be taken into account when selecting a cam profile. Yes there have been people adjusting cam timing for years. Everything doesnt make it onto these forums there is alot of amazing r&d that never surfaces on the internet