Cam specs for Ported Heads

[XfireZ51]

Originally Posted by scholtmj

This might be blasphemy, but shouldn't Ford mod motor guys have a good idea about cam size vs. flow data for 4-valve heads?

Good point. I'm also curious about what software tool Todd P. used (if at all) to develop the cam profile he recently posted on the thread about his 427 project.
Here's his latest:
http://www.zr1.net/forum/showthread.php?t=11411&page=3
What Todd is doing is very different from what's been attempted before. We certainly have much more data regarding either stock or ported heads on a stock short block. I'm just interested in using a similar process for the for the "run of the mill" LT-5 mod. If its been done before, I'd be interested in the results.

[Pete]

Originally Posted by XfireZ51

Good point. I'm also curious about what software tool Todd P. used (if at all) to develop the cam profile he recently posted on the thread about his 427 project.
Here's his latest:
http://www.zr1.net/forum/showthread.php?t=11411&page=3
What Todd is doing is very different from what's been attempted before. We certainly have much more data regarding either stock or ported heads on a stock short block. I'm just interested in using a similar process for the for the "run of the mill" LT-5 mod. If its been done before, I'd be interested in the results.

Here's my take.

I doubt it but, if Todd were to loose any low end power with his cam choice he will make up with C.I.'s.

Basicly if Todd makes for example 650RWHP @ 7k RPM i'm pretty sure he won't be making zero power at 2k or 3k RPM.
I can't wait to see how it turns out.

Pete

[ALZR1]

Originally Posted by Pete

Here's my take.

I doubt it but, if Todd were to loose any low end power with his cam choice he will make up with C.I.'s.

Basicly if Todd makes for example 650RWHP @ 7k RPM i'm pretty sure he won't be making zero power at 2k or 3k RPM.
I can't wait to see how it turns out.

Pete

650RWHP @ 7k RPM I'd love to see that one.


AL.

[tpepmeie]

Originally Posted by ALZR1

650RWHP @ 7k RPM I'd love to see that one.
AL.

Yeah, 650 rwhp is a little optimisitc. Fingers crossed for 600, though!

Todd

[XfireZ51]

Originally Posted by tpepmeie

Yeah, 650 rwhp is a little optimisitc. Fingers crossed for 600, though!

Todd

Todd,

What are you using to develop camshaft and valve timing specs?

[XfireZ51]

Here's a great article courtesy of our DOHC cousins at SVTPerformance.

http://www.svtperformance.com/forums...01-beyond.html

[Pete]

Guys emphases on "EXAMPLE".

I know bigger cam could make a lil more power.
Horsepower costs money and i'm a little short at this time.

.239 might not be worth the gains/money over my .236
.242 or .244 could be worth the few ponies
If a set of SGC Stage III intakes come up for sale for the right price i'll be all over them like a cheap suit.
It's on my to do list for the near future.

Pete

[tpepmeie]

Originally Posted by XfireZ51

Todd,

What are you using to develop camshaft and valve timing specs?

I just write the checks, Dom, and let the professionals do it. Finding someone you trust to do the cam design is half the battle. I have a simple formula using stroke length and RPM I use to get ballpark duration, which is where I pulled Pete's numbers from. Lift is a function of valve size to cylinder size and RPM.

I told my guy that he might sell 6-8 sets a year if these billets work, and if he offered a range of designs. I think the price point would have to be sub-3000 to get that much volume. The cams really need to be tailored to your airflow and hp targets, but a few "off the shelf" designs would satisfy most owners.

[Bob G]

Dom heres some ford cam specs
http://www.crowcams.com.au/media/cat...FORD%20BA8.pdf

[XfireZ51]

Originally Posted by Pete

Here's my take.

I doubt it but, if Todd were to loose any low end power with his cam choice he will make up with C.I.'s.

Basicly if Todd makes for example 650RWHP @ 7k RPM i'm pretty sure he won't be making zero power at 2k or 3k RPM.
I can't wait to see how it turns out.

Pete

Pete,

Todd is taking a methodical/quantitative approach. I'm looking at a similar approach but for a motor configuration that more of us are likely to do.
Your approach, btw, has also been very methodical. I'd like to use some other tools to point toward what the right combo should be.