This subject crops up from time to time so I'll give the example I always offer
No A/B test, there was no budget for such a luxury, and it introduces other variables as well, so make of it what you will .....
Small capacity four cylinder 1800cc + 'stock' component engine, approx 120 bhp, 1/4 mile asphalt oval
Very competitive formula, maxxed out 'stock' wise, so latest incarnation used offset bores & 'flipped' pistons also, which I believe was fairly unique amongst the class
Car was night and day faster than any other in the field especially the latter half of the straights, won 6 of 9 races IIRC and placed in the rest ...... fourth meeting car wasn't even let off the trailer with the reasoning that the engine was "not illegal under the rules, but couldn't race anyway" ...... loose lips etc
Went back to the previous 'stock' spec ...... no offset bores or 'flipped' pistons ...... and the same car was merely competitive again
So, I think in certain restricted lower powered applications there can be tangible gains and, while accepting most of the other caveats posted, might be worth a try ...... as long as the customer can keep his mouth shut
Anyone done an A/B dyno test with flipped pistons?
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Re: Anyone done an A/B dyno test with flipped pistons?
Engine masters just did a test on piston swapping https://trakt.tv/shows/engine-masters-2 ... pisodes/24
Re: Anyone done an A/B dyno test with flipped pistons?
I flipped the pistons on my Chevy 261 a while ago.
Sounds a bit different, feels a bit different, is a bit more responsive - but nothing revolutionary.
Frank
Sounds a bit different, feels a bit different, is a bit more responsive - but nothing revolutionary.
Frank