Should be plenty.

 

Well I've studied on it and I believe I'm going to use the 280h. Better low end and I can use a 2500 rpm stall. I'm going to shoot between 10 to 10.5 cr. Anything else you guys can think of?

 

Your Lunati cam has better low end than the 280h and more power over the curve. It is only 10hp short on the peak hp. It has 10-20lbs more torque across the rpm range.

 

Hey I just found that desk top dyno and down loaded it. Thank you guys for talking about it. Never knew there was such a thing! I've always done it the hard way. Either trial and error or research it to death through shops and builders. Thanks for your help guys ill post my combo and pics when she's done.

 

Just take care with it. If a certain change looks like it boosts power too much it is probably an error.

Engine Analyzer Pro is fairly accurate, given correct information. I got an older version of Desktop Dyno. In that version adding a 4bbl carb was worth 15lbs of torque from idle to max, adding roller lifters was worth 25lbs from idle to max, adding headers was worth 25lbs from idle to max, etc... In minutes you could take a stock cam and have 500hp or take a 306 duration cam and have 250lbs of torque at idle.

Everything was pure cumulative, not how it works in real life. From what I've seen from others on the forum, Desktop Dyno is more accurate than it was in the past. It is still a cheaper, user version of the program. Engine Analyzer Pro aint cheap, I just kind of happened to get one hell of a deal on it.

EAP allows you to put in flow numbers for everything. I can find flow bench data for heads on the web, put the numbers in the program and create my own set of heads to add to the database. Very cool.

From what I've seen, Desktop Dyno still makes too many assumptions, but it is still a useful tool, just not quite as accurate.

Edit: Engine Analyzer Pro isn't perfect either, it can give inaccurate results. I've just been using it for years now, familiar with it's limitations and weaknesses. I'd say on average it is within 5 to 10hp when I've got all the information. We built a nice 289 several years ago, according to the times and weight EAP underestimated it a little bit. We run an Edel Air Gap with a 1 inch open spacer, better top end on the intake due to this. EAP doesn't have an option for the open spacer, only to lengthen the runners.

 

DD is the same.. you can enter flow data for heads and all the cam specs, compression ratio, etc. It makes assumptions on induction and exhaust but for the most part as long as that part of the motor isn't restrictive it won't affect the outcome. All the graphs I posted were done with actual head flow data available on the web and real cam specs, no generic data used at all. But I'll be the first to say it's still just an estimate and actual results will vary, these programs are most useful to compare different combinations to one another to see how a cam affects the torque curve for example, not for figuring out exactly how many HP you can make. The program will get you in the ballpark however if you enter as much accurate data as possible.

 

You are going to need much more if you want to make 450HP to the wheels...either RPM, components, power adder, or displacement.

I'm working on a Hydraulic Roller 427w (4.125 x 4") with AFR 205s, 10.7:1 compression, Ported Box-R intake, custom cam (Roughly 242 @ 0.050, and 0.62 lift), 1 7/8" headers and full 3" exhaust.

I'm only expecting about 475hp to the wheels through a rollerized C6 and 3400 stall (~4k flash in a 4600lb truck). Truck is mostly a street driven and I'm only expecting it to be 12.5s capable in the 1/4 mile with drag radials

I would start with a 393 at a minimum for a 6k RPM motor...you will be disappointed otherwise.

I would expect 375HP SAE corrected to the wheels with a 351/357w with a 6k RPM NA motor and a big Trick Flow or AFR head....195s at a minimum if we are talking AFR (205s would be better)

To get SAE 450hp to the wheels, you'll need to make roughly 550HP at the flywheel through an automatic transmission with a bigger cam and higher stall converter that will match the cam profile. Be careful with magazine articles and other dyno results...many are inflated as they are usually engine dyno and not usually SAE corrected.

There is a lot of 351 info on the various mustang forums with results...I suggest you spend some time there as they build more for performance than towing