Big bore short stroke vs. small bore long stroke

General engine tech -- Drag Racing to Circle Track

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wyrmrider
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Re: Big bore short stroke vs. small bore long stroke

Post by wyrmrider » Tue Sep 02, 2014 7:10 pm

140 air- you say too small for serious power yet above you say
"But their cars are getting bigger across the board yet they don't have anything in the high power big car market.
But then they still can supercharge/turbocharge and hybridization takes some load off the IC engine."
Honda knows how to make all the horsepower they will ever need.
Now unblown and without DI well...OK

mustangcobra438
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Re: Big bore short stroke vs. small bore long stroke

Post by mustangcobra438 » Wed Sep 03, 2014 5:04 am

289nate wrote:
mustangcobra438 wrote:How much would the rpm need to increase going from a 4.100 stroke to a 4" stroke with same head and bore?
Would it be benificial to shorten the stroke with bore and valve size same between both?
58lb crank in both apps.
You'd be ahead of the game trying to increase the rpm range with a 4.1" stroke.
I currently don't have enuff cylinder head to try that:) limited to inline valve. I know of a new casting coming out that might have potential to try it.
Currently trapping 8400 with 4.100 stroke and really have to keep things in check. I think once I get some stuff lines out I may be able to bring my trap rpm down to around 8000

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