390 vs 408
Dodgeketboy -
Firstly - I think you might want to look at Nemesis 1st post with less arrogance and more intelligence - - he is a BIG supporter of 318s, as I am.
His first post questioned the speed my truck ran in the 1/4, then added a "so what", my stock 318 does that.......
YOU started the p1ssing contest, , and he was not "having a go" at your engine - in fact he was trying to help the thread starter - YOUR behaviour was pretty childish however.
O, ya, I always say peoples engines are not putting out the power they have the potential too. Which, BTW, is complete BS, my motor puts out the power it was intended and has the potential too.......
Maybe theres a language problem here? But just so you don't die completely "pig ignorant", I'll explain that i was also not "having a go" at your engine choice!
Quit picking a sentence out and Read the whole thing, and no, you weren't "having a go", you got it, but hey, if you think I am pig ignorant........ (Couldn't be further from the truth.)
FWIW - My comment re- the attitude towards suitable cylinder heads comes from our experience in Australia, where most guys have run or built a 318 (because 360a cost $$$)
It stands to reason that because most guys only know small cube V8s, they assume they can get away with factory 360 heads on a bigger cube stroker.
.....and when they realise they can't, they go "cold" and build a 360 instead.
In fact it was Moper on this forum that set me straight on why a stroker needs a lot of attention to induction and head flow.
So - to be clear - I'm not saying everyone down here gets it wrong - but the reason 390s aren't popular is because it's common for 318 guys (Like me) to overlook the BIG difference in $$$ between std stroke engines and stroker induction.
I agree, but lets stand back for a second. What HARM do small port heads, or stock 360 heads, do to a stroker?
Less than a non stroker, here's why.
There is a point, where the piston is starting it's stroke, and stopping it's stroke, in a stroker, the area where the piston is traveling at full speed, is longer and faster. Therefore, you have more chance of making power out of less head with a stroker, and also more of a chance to make power, and low end torque out of a bigger cam, because the piston speed it higher. I am not the best at explaining things, so I hope this makes sense. The reason why the power band on MY 390 is so high, but yet it has small heads, and tons of low end torque, is from the velocity of the air ramming itself into the cylinders long after the piston is don'e moving. (overlap) IMO The small port heads, and single plane manifold help this.
Like I said, he has a 318, why not stroke it? My 390, in a A body, would be flat fun, and feel way fast, spin tire, with minimal throttle, AND get good MPG. And be way snappier than a 360.
