318 build with dyno session

[PRH]

Maybe the next one will be a 360 with a similar parts “ootb” philosophy, and a bit more cam…….shoot for 450+.

 

[Desoto291hemi]

“Shoot for 450+“ ,,,,why a 360 will make that all on its own,,,,,with 1 plug wire pulled !
Just kidding .

Tommy

 

[PRH]

If this 318(323) makes 400, the 360(365) would have to be 452 to be equal in hp/ci.

 

[Desoto291hemi]

I think this one is .060 over,,,328 cubes .

Tommy

 

[crackedback]

340 with 10:1, ede's, xs282s, air gap, 950 holley, tti steps made 455hp.

This I think should get over 400. Not a lot, but over that mark.

 

[273]

It’s only 0.070” and 12 cid from a starting with a stock 340 bottom end. I think it should be fairly capable.

 

[PRH]

I think this one is .060 over,,,328 cubes .

Tommy

Then the 360 only has to get to 445.

400/328=1.2195
365x1.2195=445.1

Aim high……. Go for the full 450+

 

[PRH]

I’ll be interested in seeing if the xs274 cam has enough duration, when combined with the AFR heads, to allow the tq curve to hang on long enough to end up with more hp than tq.
My guess is the highest tq/hp numbers will be close to each other.

 

[Spadman]

All these 318 builds made me go get one from my old place that I had written off years ago. It’s an Oct 1969 casting date, and like the man said, it was running when I took out lol.

 

[66fs]

All these 318 builds made me go get one from my old place that I had written off years ago. It’s an Oct 1969 casting date, and like the man said, it was running when I took out lol.

Hopefully thick wall cylinders.

 

[NCmtnDWELLER]

The shortblock is done!

View attachment 1716399727

As usual looking good !!!

 

[PRH]

Looking at the weather in the concord area for the upcoming week…… wrt dyno testing……… it would be “no bueno” for me.

 

[NC Engine Builder]

Looking at the weather in the concord area for the upcoming week…… wrt dyno testing……… it would be “no bueno” for me.

Yeah, I been thinking about that also. Its hotter than 40 hells here, and high humidity

 

[gzig5]

Yeah, I been thinking about that also. Its hotter than 40 hells here, and high humidity

Doesn't that describe the whole summer in NC?

 

[NC Engine Builder]

Doesn't that describe the whole summer in NC?

Pretty much!

 

[JDMopar]

It's so hot here in NC......I saw 2 Beagles giving water bottles to a Rabbit to cool him down so they could run him!

 

[Mopar Sam]

It's so hot here in NC......I saw 2 Beagles giving water bottles to a Rabbit to cool him down so they could run him!

I saw a fire hydrant chasing a dog..

 

[CFD244]

I saw a fire hydrant chasing a dog..

I farted and wasn't sure if I shat myself, or if it was just sweat spraying off my a$$hole.

 

[gzig5]

I farted and wasn't sure if I shat myself, or if it was just sweat spraying off my a$$hole.

View attachment 1716435356

TMI.

 

[RustyRatRod]

I farted and wasn't sure if I shat myself, or if it was just sweat spraying off my a$$hole.

View attachment 1716435356

Ewwwwww.I wouldn't a said that. LOL

 

[TT5.9mag]

Yeah, I been thinking about that also. Its hotter than 40 hells here, and high humidity

That’s what correction factors are for!

 

[mygasser]

or fit ac to the dyno cell?

 

[Icetech]

Yeah.. the heat makes me not go outside at all.. i stay in my basement which is all setup nice and stays cool...

 

[33IMP]

I’ll be interested in seeing if the xs274 cam has enough duration, when combined with the AFR heads, to allow the tq curve to hang on long enough to end up with more hp than tq.
My guess is the highest tq/hp numbers will be close to each other.

I understand you mean peak numbers.
What do you think the spread will be. Peaks at.......?

My half-fast guess? Peak tq at 3500-3800, peak hp at 5600. Grain of salt.

 

[PRH]

My half-fast guess? Peak tq at 3500-3800, peak hp at 5600.

My guess is that if the peaks happen at that low of an rpm, then the power numbers will fall short of the “400 range”.

Different dyno, but I tested a similarly sized cam in a 360 with “lesser” heads that peaked a fair amount higher than your prediction.

Unless something is holding it back……..I’m thinking the peaks will occur at more like 44-4600/6-6200.

But at some point, the answers will be revealed.