carb size for 512 stroker?

What can we do with a 750 cfm carb and a hydraulic roller?

So this 505 has been a pain in the pahtoot! It has a 750 cfm Holley and now a hydraulic roller about the same duration as the OP but is running .632 lift and the heads are flowing right around 310 cfm at that lift.

First to deal with........the hydraulic rollers. These are Crane rollers going for about $650 a set. Called Crane, "What do I use for pre-load on these solid gold lifters?"

So when we finish the dyno pull (6200 rpm), the lifters, that were silent at the start, are rattling their guts out.

"Hey Crane, what gives?"

Use more preload.

"And if that doesn't work?"

I don't know. We generally use more pre-load if they collapse.

"Okay" sez I, "thanks."

More pre-load goes in and they are rattling at the end of the run.

At what rpm will they not rattle? Well they still rattle at 5200 rpm and why have 505 ci that you can't wind more than a stock 383?

Hey son! We're going to put the solid rollers on this cam.

You see, the hydraulic lobes I have access to don't suit my purposes so I had the cam ground with solid roller lobes.

Here are the back-to-back pulls. First with hydraulic lifters and then the solid lifters.

RPM.............TQ/HP...............TQ/HP

3000..........517/296.............523/299
3200..........539/328.............548/334
3400..........583/377.............594/384
3600..........587/402.............598/410
3800..........587/425.............599/433
4000..........597/455.............600/457
4200..........589/471.............600/480
4400..........596/499.............600/503
4600..........609/533.............611/535
4800..........617/564.............613/561
5000..........611/582.............619/589
5200..........605/599.............614/607
5400..........594/610.............601/618
5600..........578/616.............591/630
5800..........556/614.............574/634
6000..........544/621.............560/639
6100..........533/619.............550/639

Now the customer provided an Edelbrock Torker II intake for his build. The above runs are with the Torker II. Next is what happened when all we did was change to an Edelbrock RPM Performer intake.

3200..........600/366
3400..........616/399
3600..........630/432
3800..........627/454
4000..........621/473
4200..........612/490
4400..........599/502
4600..........603/528
4800..........609/556
5000..........607/579
5200..........611/605
5400..........603/620
5600..........591/630
5800..........567/626
6000..........546/624
6100..........534/621

Yeah, 32 more lb-ft of torque at 3600 rpm.

What about a bigger carburetor? Maybe we'll see tomorrow morning.

SO........JamesRR, what is wild as possible?