There are many misunderstandings on cam shaft operating ranges and torque converter stall speeds shruggy
If you have not built and driven a motor with a small camshaft and then the same basic motors with a lot bigger camshaft you may think big is bad, it is NOT tsk work
I've built and dyno tested a lot(8+) of stock stroke 440 pump gas motors with stock type heads and then with mildly ported stock iron head with bigger valves and bigger camshafts, almost all of them where dyno tested using a Holley 850 to 950 CFM carb.
One of the first motors was a 446 C.I. with stock 906 heads, a mild hydraulic lifter camshaft from Comp and a stock six pack set up, that motor made 470 HP at around 5400 RPM and more torque than HP. The last stock stroke motor had a one off weird grind Reed camshaft that was ground on a 101 lobe center and was a lot bigger on the duration than most of the common street grind camshaft. That motor made 535 HP at 5900 RPM made 500 HP at 6500 RPM with 9.5 to 1 compression ratio with a set of 906 mildly ported heads with 2.14 intake valves and 1.74 exhaust valves work
The first pump gas stroker I made was for my own car and it was a 400 block bore to 4.375 with a 4.250 stroke crankshaft and a solid roller camshaft that was 260 degrees at .050 on the intake lobes with .420 lobe lift, it had 266 @ .050 on the exhaust with .409 lobe lift ground on a 108 LSA installed at 106 degrees on the intake lobes. I made it have 9.25 to 1 compression ratio for CA pump swill sold back then before E10 was invented shruggy
That motor had a set of cheap Chinese imported rocker arms that where suppose to be 1.6 ratio but checked out to be 1.54 at the valves whiney
I used a low deck stock type Eddy six pack intake and a set of 440 vacuum carbs, I was hoping it would make between 550 to 565 HP. We pulled it from 2500 RPM to 5000 RPM on the first two pulls, it made 592 HP on the first pull and 598 HP on the second pull at 5000 RPM and it made 630+ Ft. Lbs. at 5000 RPM shock boogie grin The next pull we moved the RPM up to 5500 and finally made all pulls to 6500 RPM to make sure the motor was tested at peak HP and torque.
That motor was a real eye opener for me on pump gas stroker motors, that motor ended up making 612 HP at 5500 RPM and 644 Ft. Lbs. at 4500 RPM on CA pump swill that day back in 2001 shruggy
I tested a bunch of different things on that motor on the dyno that day and later on even more parts and tuning over the years up wrench
It ended up with a 4.300 stroke crankshaft to raised the compression ratio and a set of Indy SR M.W. port size heads with 75 CC chambers which made the motor have 10.78 to 1 compression ratio, I also replaced the cheap import rockers with a set of Harland Sharp 1.6 ratio rockers that checked out to be 1.65 actual ratio at the valves thumbs I used a Indy 400-3 intake with a 1050 Holley Dominator carb, list # 9375 non HP, that combination made 727 HP at 7000 RPM and right at 695 Ft. Lbs. torque on Oregon 91 octane pump swill on a DTS engine dyno in Klamath Falls Oregon which is 4300 Ft elevation devil
My message is you can make more power with bigger and better parts up
That motor was in my old pump gas street 1971 Duster that weighed 3450 Lbs. with me in it and a full stock gas tank ran a best of 9.993 at 134.8 PH in the 1/4 mile at Woodburn Oregon in late summer corked up with the air cleaner on boogie
It had a complete 3.0 inch exhaust system with a pair of Magnaflow 14x7 inch wide oval muffs with 3.0 inch in and out mounted at the rear bumper.
That motor and car exceeded my wildest expectations shruggy work
Think about what you want and decide exactly what you want to achieve and then go for it up
You can achieve anything you set out for, it may not be easy or cheap but it will be enlightening and fun, hopefully luck scope
Good luck thumbs

Last edited by Cab_Burge; 10/17/18 03:48 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)