Got my 306 on the engine dyno today

[289nate]

306 with 11:1 compression, out of the box AFR 220 heads, AFR Renegade intake ported and a solid roller. Couldn’t fit the headers Calvin made for it. No doubt it would have helped.

Run on 91 octane Cali pump gas. Street/strip deal to go in my 1965 Mustang fastback. Made 555 hp by 7100 rpm and then hp flattened out. 26 degrees timing. Didn’t like 28. Nice flat torque where I wanted it. A bit surprised that it made pretty good power and had a flat torque curve at this low of an rpm.

[289nate]

With 24 dergrees of timing and a few pulls with no real cool down time. These modern chambers are amazing. Even with a small dome piston.

[289nate]

Dynoed at Verbancic Bros Racing. Bob and OJ were a pleasure to work with. Even if my engine is a couple thousand hp short. Haha

[1972ho]

Wow that torque and hp curve are really close to one another seems like a torque converter will be hard to get and rpm after the shift will be no drop.Seem like it would like manual transmission better.But good power for a small cid engine.

[steve cowan]

Nice power,well done.
Will hang on past peak for sure,
Pretty good BSFC with the larger induction tract as well.

[289nate]

On one pull peak torque came in at 5,600. A few here a few there. I am going to pay much more attention to when it is out of the torque curve or rather plateau. It is indeed a stick shift application. Good call. My guys designed it with that in mind.

[289nate]

Wow that torque and hp curve are really close to one another seems like a torque converter will be hard to get and rpm after the shift will be no drop.Seem like it would like manual transmission better.But good power for a small cid engine.

Did you even look at the power curve??? What is this place?

[289nate]

Nice power,well done.
Will hang on past peak for sure,
Pretty good BSFC with the larger induction tract as well.

It’s a good starting point. I believe there is something to play with above 7,100. Ideally this will get mean at 7,800 and eat a few beyond that.

[Mummert]

What kind of compression and cam did you run in the engine.

[289nate]

A real 11:1 compression. Intake lobe was low 250’s. Exhaust lobe 10 more. Lift on the intake about .720’ish. Less on the exhaust.

[289nate]

Crap 91 octane from the cheap no name station down the street

[Tom68]

Imagine the horsepower with more cam, wow.

[steve cowan]

Imagine the horsepower with more cam, wow.

I am not totally sold on the big cam theory, my opinion is if IVC and EVO are in line for the application the engine will tolerate the other events even if more duration is applied.
With more compression I will say yes to more duration.
In a drag racing deal where you want to carry past peak and beyond the bigger rpm,intake valve,big induction tract, lift and duration would be a bonus.
Just my thoughts.

[Tom68]

Imagine the horsepower with more cam, wow.

I am not totally sold on the big cam theory, my opinion is if IVC and EVO are in line for the application the engine will tolerate the other events even if more duration is applied.
With more compression I will say yes to more duration.
In a drag racing deal where you want to carry past peak and beyond the bigger rpm,intake valve,big induction tract, lift and duration would be a bonus.
Just my thoughts.

Yer it has a great power curve and probably exactly want 289 wants, more cam derived power won't make it a better engine but it looks like it'd give a lot more peak HP, happy to be wrong and keen to know why.

I just think a bigger cam as a one change item would really up the HP, another interesting one change (well 3) would be a Tunnel Ram with a bit more runner length and see what the mid range HP comes up to.

[blykins]

Cam changes don't necessarily mean that it will make more power. There is always a point of diminishing returns for a head/camshaft combination given a specific displacement/application.

The last 311ci SBF I did, with 185cc AFR heads, ported Vic Jr intake, and a 239 @ .050" solid roller with just .550" lift peaked the horsepower at 7400. It made 535 hp with 454 lb-ft of torque. That engine only had 10.3:1 compression.