hotmustang331 said:
CID is a waste of $$$$? LOL. I have heard that the 5.4 Mod motor is basically a stroked 4.6, although it does have a tall deck I belive, but the stroke is long like a stroked 4.6. You cant go wrong with a stroker, 21CID means that you are no moving 21 more cubic feet of air. That = more power, bottom line. Why do you think these guys run 529CID BB ford motors, just for grins? They have a LONG stroke, heck all BBs have a long stroke. People get told something, and through the laws of physics out the window, if your moving more air, you WILL make more power...remember an engine is basically an air pump, the faster/more air you can move through it, the more power you will have. Dont worry about RPM limits going down as we are talking a VERY slight increase in stroke, like less than a 1/4 of an inch from what I have read.JMO
Ok belive what you want.Our engines need BORE not stroke to make the best power.
Quotes from some well known tuners and mod motor builders:
I have watched the "stroker" craze happen on these motors, tuned quite a few, and had to explain to customers that more stroke is less power. Some believe me, some don't, I don't care, it's about physics. So many people are sold a bill of goods by stroker kit manufacturers (I'm not taking any cheap shots, just making comment) on how much more power they will make, and the answer is less. Yeah, maybe they put better heads and cams in the motor to make better than stock numbers, but those same parts in a shorter stroke motor would make more power, but less torque.
I'm not saying that stroker kits are bad (although I agree with Mike on the bore needing to be maximized first), they do gain torque, and a street car probably feels better at the traffic light with a longer stroke. But, you will lose power on the top end with a longer stroke. There was a thread a few months back about what it would take take some high RWHP 2V, and everyone said a stroker motor. I almost posted and called them all idiots that just pass on mis-information they hear on the internet
Here's the numbers right out of the 5.0 mag....
Stock 4.6L vs VT Stroker Short Block
------------TQ-STK----HP-STK--TQ-Stroker--HP-Stroker
3,400------274.2-----177.5------341.0------220.8
3,500------282.6-----188.3------340.3------226.8
3,600------284.5-----195.0------339.1------232.4
3,700------290.6-----204.7------343.3------241.8
3,800------296.2-----214.3------326.3------236.1
3,900------303.0-----225.0------320.9------238.3
4,000------298.2-----227.1------303.0------230.7
4,100------293.2-----228.9------301.7------235.5
4,200------306.3-----245.0------296.7------237.3
4,300------306.2-----250.7------286.5------234.6
4,400------301.2-----252.4------285.7------239.4
4,500------301.3-----258.2------273.0------233.9
4,600------299.6-----262.4------268.0------234.7
4,700------300.5-----268.9------263.8------236.1
4,800------296.9-----271.4------256.5------234.4
4,900------292.5-----272.9------253.9------236.9
5,000------289.7-----275.8------251.9------239.8
5,100------282.0-----273.8------245.2------238.1
5,200------276.3-----273.5------245.3------242.8
5,300------272.2-----274.6------241.0------243.2
5,400------261.0-----268.4------241.6------248.4
5,500------250.4-----262.2------235.9------247.1
Apparently I did read it right..it lost HP in the higher rpm range where you're gonna use it on the dragstrip.
Take the gains of the big-bore and those of the storker,and do a hp/$ calculation...
Or even better..do the averge for hp under the curve,and then do the hp/$ calculation..
It's pretty clear what I'd want.(this was oringinally posted by JL ).
By the way .I make my power with OUT a stroker engine or big bore
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