Valvetrain had good parts in it but nothing really exotic. The heads and valves were box stock. We changed the valve springs and used T&D rocker arms. Here is one of the articles: https://www.motortrend.com/how-to/dyno-tested-vacuum-pump-help-engine-make-power/

Down the road goals, I guess, I am not sure as I have a lot on my plate, and next year my world changes drastically as I relocate south. So 5.90 is just an incremental goal I have wanted to hit, but would love to win another points season championship.The car works well, so, if I keep finding ways to lighten it, or better parts for the engine, we might hit my goal this year. There is about 50lbs of weight I know if I work at it, I can remove. Maybe more intake porting....And we have brand new slicks...

I will build another 543 I think this fall as a backup....For the money, I think that is one of the best combo's a person can build....After that, I have to finish up my Cuda and then collect parts for the Barracuda and bu then, it will be time to move south.

What did it run et wise ? just curious about these heads.
I built a 12 to 1 511 rb with used SR's and a flat tappet cam for 4500$ its been 9.60's

That engine never went in a car. Sold the top end to one guy, the short block to someone else and the oil system got parted out to a bunch of different guys.

If I was building a wedge I would look up Andy F's builds and copy one. He knows how to milk a wedge.

So reliability is a must, to win a championship. Low maintenance, long life motor.

Thanks, I am curious if this would be new territory for that head. I my book 5.90's is pretty fast. Kinda like the 10.0 to 9.9, but the next step.

Exactly. So you will never know how it ran. Dyno = bullsh!t if it don't run a number

Yeah, now you have me thinking that with all the variables in these dynos, was it actually 750hp

“In theory”, a 5.90 in the 1/8 is about a 9.25 in the 1/4.

At 2950lbs the Moroso slider shows 705hp, uncorrected....... as it sits on the starting line.
So, figure you’ll need somewhere around 6-10% more STP corrected dyno HP to end up with that figure in typical upstate NY summer air.

775hp seems like a big ask for a bread and butter bracket race pump gas 511.

Yeah, typically this combo runs 6.20's......We have been 6.14 on pump gas with an almost identical combo....But as I mentioned, we have made a few small changes to it. That combo had a basic 295 head with 2.19 valves, and this will have a 325 with 2.25 valves, and this new cam is bigger too, and the free'r flowing headers this time, fresh slicks...and maybe 50lbs less weight....We are trying to hit it without sacrificing reliability. Last two seasons, we lashed the valves once, and we were good for the season. Good valve train = happy engine with good tuning.

The other thing I can do, is go higher launch and shift rpm....

Using the same factor that shows a 5.90 in the 1/8 as a 9.25 in the 1/4, shows a 6.14 in the 1/8 to be a 9.63 in the 1/4.

On the Moroso slider, a 9.25@2950lbs shows it would require 85hp more than a 9.63@3000lbs.

The Wallace 1/8 mile calculator shows 69hp more to go from 6.14@3000lbs to 5.90@2950.

Nonetheless, sounds like you have a plan...... which we’ll look forward to you sharing the results from.

I agree, 775 isn't going to happen from a bracket race pump gas 511. Those typically make right at 700 on the dyno. Everything has to be just right to get the extra 10% which means you have to be willing to spend a bunch more money on parts and dyno time. Most guys just make a few pulls on the dyno to verify the build and then go racing.

I just caught rhe part about pumpgas. Seriously, you need cubes and airflow for that . What parts do you have to throw at a 4.5 bore aluminum block? Maybe $ 6600 to get one in hand (BME) , ready to assemble, and750 to 800 pumpgas hp will be a whole lot easier to do. The block should turn out to be a one time investment, and 100 pounds off the nose is huge . How much would it cost to replace two broken stockblocks? A lot more than just blocks and machine work.

So it sounds like the 325 is the "correct" choice

Mega Block 589 cubes 4.565 bore x 4.500, just 10:1cr, 5/64 ring pack pistons, tiny Herbert street s/roller, .625/.625" 260/270@.050, 572-13 365cnc heads, 440-2, old 950hp carb, =695 dyno hp@5500-5900, how hard to get another 100hp from that spec upping the CR etc.,and still keeping it pump..... it has gone 10.3@130 with a 727 with a street converter in a 3800lbs RR in full street trim on a 10x29" Hoosier tyre on a no wind day at Santa Pod. Take 850lbs out of the car and it would go>

60 Foot E.T. : 1.31 Seconds
1/8 Mile E.T. : 5.95 Seconds
1/8 Mile Trap Speed : 114.22 MPH
1/4 Mile E.T. : 9.43 Seconds
1/4 Mile Trap Speed : 142 MPH

Just an example.

You dyno and horsepower guys kill me. Lol. Get the damn thing to the race track and put in some work. My little 422 with a solid lifter cam has gone a best of 5.98 and a boat-load of low 6.00’s. Not at some coastal super track either. Off the shelf pistons, no vacuum pump, no special ring packs, and a bracket sized tire 4 inches bigger than needed. Sure it’s 2880 pounds but yours could be too.

it has gone 10.3@130 with a 727 with a street converter in a 3800lbs RR in full street trim on a 10x29" Hoosier tyre on a no wind day at Santa Pod. if that was aimed at me John?......I don't hold much on dyno's either but this time this one was on the money EDA is the company.

No it wasn’t aimed at you. Why did you think it was. Maybe I hit reply like most people do from the post above it.

ok John, no worries what you do is cool man.