:rolleyes: Doug that sounds about right :lostmarbles:

I don't want to jinx Brent, so we'll just wait until after the weekend, and see how it goes.

Ok no estimates/targets... I didn't see the cam specs..... can you give us a rundown on all the key engine specs?

Bore x stroke
Cam specs
Carb size
Compression
Header size

:thumbsup:

Yea what he said:twak:

Yea cough up those specs :warning: and what's with the backpeddaling? :mock:

I'll see you over in the dyno shootout corral. :guns:

:cheers:

Oh man, you are going to use my own posts against me

:lol:

Shoot, I guess I have to man up

850 cfm quick fuel
10.5 -1 Pistons

4.250 stroke
4.270 bore

cam 110 LSA, .634/.634 hydro roller
Hand ported edelbrock heads, polished combustion chambers, exhaust ports, t&d (street)
port matched rpm manifold
Exhaust flowed decently on the bench
FPA tri-Y headers dyno test will be on bigger pipes

I did do a hp guestimate at work today, dunno how accurate it will be, I don't know the cam

Well there isn't a lot to work with for a guess. What were the head flow #s?

I'll use a Larry Meaux formula to hazard a guess. Based on your max cam lift .643 x .87 he says to look at the closes flow number so I round up to .600 lift flow #s of an ED head. Stock that is about 252 cfm. Barry R and some others advertise a street fluff (not a CNC port) flow number around 270 cfm. A lot of that flow improvement comes from the valve job so I'll give you 270.

Not knowing the real cam specs then Larry Meaux says 270* .257(a factor for a street strip style wet sump build) * 8 (number of cyls) I should have just doubled the flow # and sprinkled 15hp on there for good assembly I would have got the same #.

So I give you 555hp :sieg:

Based on the lift and 110 LS and from what I've seen on FEs with mild hydro rollers I say this peak will be around 5700 rpm.

I'm going to guess Brent used a lobe that was geared to some more torque production since you had such a focus on open road cruising and grocery go getter. So how about 595ft lbs of torque.

There sure is a lot of guess work:bang: going on here but that's what I got.:headscratch:

If he is using a good set of stepped dyno headers with some proper sized merge collectors he may give you another 10-15 hp and some more torque.

Tell Brent to get it on the dyno :gitrdun:

Did you give it a run on desktop dyno with some generic cam numbers and your actual head numbers? And what is your guess?

:cheers:

Your Ford brother up here is sure on fire... :computer:

Your engine build specs appear very similar to Todd's (Vegas69) first 496 stroker BBC.... and it was just under 600 hp at the crank.

I think Rob's hp number is low.... I am gonna go 580-590 and close to 600 ft lbs. But then again he does know Fords.... presumably.

Let's see if I am closer to the numbers.

Now let er rip... Ripped! :thumbsup:

You had a pretty sharp guess on the flow numbers, but I did not do any significant porting on the intakes, more port match and clean lumps and bumps and clean up the valve stem a little.

The exhaust got a lot more attention, but with small headers it was pointless to open them up to a big huge port, then squish them down into the FPA's

I think the unknown is the combustion chamber work. The valves were unshrouded and chamber polished. More than that, I did a little bit of arm chair studying on the "gas swirl" patterns of various heads and tried to use a little logic on how the air fuel mix enters the combustion chamber, and how the exhaust gets "squished" out.

Might not make a whole lot of difference, but maybe it will. Also exhaust at high velocity, intake, less.

Intake

.050 - 39
.100 - 65
.200 - 127
.300 - 185
.400 - 219
.500 - 250
.600 - 271
.700 - 272

Exhaust:

.050 - 36
.100 - 56
.200 - 103
.300 - 138
.400 - 166
.500 - 190
.600 - 202
.700 - 210

Kinda similar to the Barry R stage X heads,

So my (guess) calculation ended up being a little more conservative;

537.5115207
581.0599078


July 2 should be the last dyno day, if all goes well.

Hey, conservative numbers give you a great chance at being happy at the end of the day. :thumbsup:

Yeah, honestly I think 600 is at the high end of what's possible, with this combo, BUT that would be nice.

I think the other unknown, is Brent's tendency to be fussy on the details. I know that will help with the reliability and endurance of the engine, but I'd wager that will also help in the hp dept. just a little.

Right now I am counting down the days, before the car comes alive again ;)