cam help 460, 030 (19cc dish) w ported D3's

bigfun said:

I am building a pump gas 460 for my sons fox mustang and need some cam help. I have a 46o, 030 (19ccdished) forged pistons, really nicely ported d3's I just found (look like "scotty" type porting).

I don't know the piston deck height yet, but I think compression will be 8.5-9.0 to 1.

What cam duration and lift would you recommend to make great power...taking into consideration overlap and lack of compression?

Owner said this combo made 538 hp and gave me cam with it...except there are no markings to tell what i have so i will likely not use it.

I plan on c6 with 3500 stall and 3.90 gears going in 3000 lb 88 fox mustang.

Suggestions?

Thanks. Phil

Click to expand...

First, click on this link:

http://www.network54.com/Forum/267359/thread/1253311261/last-1253325348/HP+Chart

It the lastest version of the HP chart.

Second, if the heads and pistons are a must, IMHO, copy either the 375-400 HP or 400-425 HP combo. While you can always stick in a big cam, you'll be killing low and mid-range torque, and the vehicle is going to feel sloggy on the street. While it is fun winding out the motor at first to get good acceleration, it gets old after a while.

Mill your heads and equalize the chambers at 90cc. This will give you 9 to 1 compression. Zero deck, or have the pistons out of the hole by .005, to maximize the additional torque the tight quench will give you.

Cut back on the converter as well. 2000-2500 rpm stall would work just fine. Keep the rear gearing.

Hope that helps,

Dave

meandad said:

my dumb a$$ did'nt even know there was a newer version!

Click to expand...

As newer parts come out, it makes it easier just to buy and bolt on. The newest version includes RHP's newest D3 replacement heads. It makes it easier, for some individuals, just to buy Stage I, II, or III heads than finding a shop to port their stock D3 or D0VE heads. Scott has a very good price on those heads, and it is hard to beat after you consider all the costs involved installing new components and porting.

I'll be adding the new TFS "Mafia" intake to the higher hp builds as it becomes available as it is more of a finished piece than a "fully ported" Victor, as another example.

Remember, and I quote from the HP Chart:

"In regards to this chart, for every listed horsepower level, there is at least 10 different combos to get that same power. The builds outlined will get you the horsepower listed, but they are not the only way. Every individual's combo requires its own unique build.

In conclusion, this chart cannot be everything to everyone. Think of this chart as just as a guide-line to get you started in the right direction."

Hope that clarifies,

Dave

Very helpful information one more cam question.

Thanks great site and build specs, I may even mill heads to give me 88cc. I am also looking at thin head gaskets...contech? What is standard .041?

How can I find out what the current cam (that was sold with motor) specs are? Seller lost cam card and I don't see any distinct markings or stamped pn's or mfg. In a sideby side comparison to a stock 429 cam i have i can clearly see its lift and duration are different?

Is it as simple as measureing it with a good tool for lift? Anyone know a reasonably priced 460 smart machine shop in IL?

Thanks,

Phil