318 build with dyno session

[NC Engine Builder]

Oh i see.
Yeah that seems quite likely.

Not that it’s a huge difference but I think the AFR site lists the valves for their heads as 8mm.

They are indeed 8mm, in fact the valves, retainers and springs are all LS based parts. That's actually a plus as far as I'm concerned

 

[B3422w5]

They are indeed 8mm, in fact the valves, retainers and springs are all LS based parts. That's actually a plus as far as I'm concerned

That 8mm is a fair bit smaller than 11/32 isn’t it?

 

[Dartswinger70]

8MM = roughly 5/16 in.

 

[gzig5]

Yes, but I meant the bare casting was the same.

I don't know where they come from but I recall that NC Engine Builder said that my ProMaxx 171 heads had a nicer short turn than the typical SpeedMaster. So I don't believe the SM and PM are the same base casting, and PM does all their own machining. I would also assume that the new AFR is a unique base casting as well since the port as cast is different in size.

 

[gzig5]

8MM = roughly 5/16 in.

Yup ^^

8mm = .3149"
5/16 = .3125"

For those that are curious, metric to english conversion is x divided by 25.4. 8mm / 25.4 = .3149".
English to metric is x times 25.4. For 5/16 it would be .3125" x 25.4 = 7.937mm.

I used to work for a Swiss company and all our machines were metric and when training US employees on them, I became very adept at converting units back and forth.

 

[NC Engine Builder]

So after the successful cam break in, I needed to remove the oil pan to fix a leak, so i thought I'd peek at the bearings, and they look perfect, actually looks like it never ran. Coated King bearings look perfect. Maybe I got it cleaned pretty good before assembly!

 

[TT5.9mag]

So after the successful cam break in, I needed to remove the oil pan to fix a leak, so i thought I'd peek at the bearings, and they look perfect, actually looks like it never ran. Coated King bearings look perfect. Maybe I got it cleaned pretty good before assembly!

View attachment 1716433556

Well, should we expect any less out of you? Nice job.

 

[Dart Frog]

375 HP and 375 foot pounds of torque. My guesstimate.

 

[NC Engine Builder]

Well, should we expect any less out of you? Nice job.

Thanks!

 

[NC Engine Builder]

All of you guys feel free to post you HP/TQ guesses, it will be fun to see who is closest!

 

[TT5.9mag]

348hp and 371lb/ft

 

[halfafish]

381 HP, 402 TQ

 

[273]

418 hp @ 6,200 rpm / 394 lbs-ft @ 4,800 rpm

 

[TT5.9mag]

418 hp @ 6,200 rpm / 394 lbs-ft @ 4,800 rpm

Look at you gettin all fancy with actual rpm and everything. Should we check the math?

 

[318willrun]

408 hp/390 trq

 

[273]

Look at you gettin all fancy with actual rpm and everything. Should we check the math?

Here you go
328 cid x 1.2 tq:cid (394 lbs-ft) x 90% x 6,200 rpm / 5252 = 418 hp lol

 

[TT5.9mag]

Here you go
328 cid x 1.2 tq:cid (394 lbs-ft) x 90% x 6,200 rpm / 5252 = 418 hp lol

I knew you did that. I expected nothing less.

 

[B3422w5]

391 horse
402 torque

 

[Desoto291hemi]

397 HP.
6400 Rpm
It should spin up even higher than that though
Sounds like a good combination and an excellent builder .

Tommy

 

[jrc4y4]

403 hp 421 tq

 

[Ant]

Pi multiplied by 130.0, that's my guess for horsepower.

 

[TT5.9mag]

Pi multiplied by 1.3, that's my guess for horsepower.

That’s only 4.082hp. Quite the underachiever.

 

[fishmens67]

1.2 HP per cube says the crystal ball.

 

[NC Engine Builder]

1.2 HP per cube says the crystal ball.

I think that will be pretty close

 

[TT5.9mag]

I think that will be pretty close

When’s the dyno scheduled?