I've seen A LOT of posts about making HP with a 318-So why is it so ???
Factory must be a lie then. LOL Just looking at the charts. I don't have a dyno.
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Where is the extra 110ft/lbs going to come from?
With these mild builds, the gain in hp comes from moving the tq peak up the power band, and having the curve hang on longer.
You don’t need to make more tq to make more hp.
If you looked at the dyno numbers I posted from 1990, you’ll see the motor didn’t even make as much tq as the factory rating...... yet it still made 60hp+ more than the factory rating.
Less peak tq...... but at a higher rpm.
There’s a reason the factory HP stuff came with higher stall converters and a little more gear.
The methods used to allow the motor to have more HP, reduce the output at the lower end of the power band.
That’s pretty much “hot rodding 101”.
For a 318 to make 450ft/lbs, the tq/ci would be 1.41.
This thread is slanted towards milder builds.
How many magazine builds can you find, that are in the vein of milder builds, where the tq output is 1.41/ci?
That’s 500 for a 355 Chevy
514 for a 365 Mopar
628 for a 446
650 for a 461
Out of mild street builds.
I never see those kinds of numbers out of that type of build.
It’s usually more like 1.10-1.20.
