Torque & HP Open Discussion

Some saturated foam I'm sure, however, I replaced the floor last summer and had the foam sitting free to breathe for over a month inside and out in the sun. Stringers were solid as a rock and still had the original womanized coating on them. My brother has a 26' cabin cruiser with a Chevy 350 (260hp)and Bravo 3 outdrive weighing 6,000lbs+ and it comes out of the hole as quick as my Southwind. I don't expect a hole shot like the Mustang on YouTube, but it should get up quicker than a 26' cabin cruiser. If I raise the prop pitch, will that help the hole shot? What about a 4 blade prop or a reduction gear? By the way, you can have your Found On Road Dead and I'll keep the most reliable engine ever built (Chevy 350). Thanks for everything guys!!

Back to business....Joe in NY is at it again and asked me to plug his specs into Desktop Dyno so here you go....eat your heart out!!! This thing puts up monster torque numbers.






Joe, Take a look at all the specs and let me know if anything needs to be changed. I guessed at a 700 cfm carb, also used high performance manifolds and mufflers for exhaust. The chart jumps by over 50hp if I set it up for headers and no mufflers, time to cut some holes in that motor box.

Alan glad to see your up and running again. I have a 650 and a 750 cfm carb, this will most likely run the 750. Rod length is 6.2 inches. The lift numbers you used are the numbers for lift height at TDC, they are only there to assist in "degreeing" in the cam I should have mentioned that since he highlights them in green they were the first numbers I jumped to as well. I think the numbers that you really want to use are Net lift numbers listed which are .568 Intake, and .565 exhaust. The wet exhaust setup on these things is a tricky variable, there is no doubt there is a restriction but I had my hiteks made larger 1 7/8" tubes that run to the 3 inch collector and dual three inch exhausts that are considerably shorter than a car and have no mufflers. They certainly sound better than the average car with performance manifolds and mufflers. My guess is they end up somewhere between the two.

This engine with the cast iron heads, lower compression, dual plane intake, different cam, dynoed with the ported pcms (filled with but not pumping water) at 401hp at 4850 rpm. No plans to dyno it this time around as I really didnt get the tuning benefits I was hoping to get the first time out.. partially because there was no way to run water through the exhaust and partially because I didnt generated enough vacuum to get my 750 carb to work right and ended up switching it out after the fact.   

The goal with the current changes is mostly to move the power band up into higher rpms hopefully 5500 or so, as I was finding it hard to get a prop that would get down under 5000 rpm and if I did get one it would be at a pitch larger than what a 1 inch shaft can safely support. Along with that the pistons that came out over the winter were pretty well toasted so hoping the aluminum heads will help remove some heat.

[QUOTE=81nautique]   Can you tell if those lift numbers are at .050 or .006. I think they're at .006 but the IV/EV timing events are at .050 so I did do a little guessing.
[QUOTE]

Now you lost me.. lift is lift it occurs at an angle not a height?... did you mean duration. Duration is 268.5 intake and 280.1 at .006 or 218.5 int and 230 exh at .050.

to get lift, Ill set up a Dial indicator on the rockers and hand crank the engine, zero it on the low side and the make a complete pass until the indicator goes back to zero, lets say it was .310. then you take that figure and multiple by 1.5 and that is your lift on that valve....in this case my lift is .465
just threw that out there for info

Oops it didnt upload the head info? M-6049-X305 ford racing part #, I will try one more time