- Dec 22, 2006
The Dunstall ad claimed " Testing resulted in a 1.14 second reduction in 1/4 mile time, just by installing this exhaust on a stock Commando!"I suspect that the HP increase with the 2-1-2 exhaust as detailed back in the day was accompanied by other changes - main jets, adding velocity stacks, change of muffler, etc - stuff like that. I don't believe a HP increase occurred simply by bolting on the 2-1-2 exhaust with everything else left as OEM.
The ad was from 1970 so it would be referring to the 750, however that claim seems pretty wild given my 850 results.
Really looking forward to the SS pipe test. I have read that these pipes give a bit of a midrange boost. Will soon find out!
Hot weather here for a few days, will wait for cooler conditions. I try to do the runs in mid 60s f temps.