G
gus bohne
Well-known member
As a person who worked for a dyno manufacturer and owned a few.
There is NO gain for anyone to play with correction factors.
all one needs to back up any dyno test is fuel lbs pr hr and the bsfc.
then no amount of manipulated corrections can fool anyone..
it takes airflow to make torque, psi of boost is a factor but falls out of accurate measure when you are working with small turbo,s or NA high or wide port timings.
fwiw. we have some dyno work on the ho and non ho 800 doo with the 2876 and 2860. carbed of course. same sled just comparing turbos. and of course its seal level so the base compression has been lowered which drops the NA power base line thus lowering the total power output by said amount.
15 psi for us was 263 falling off hard at 8400 rpm 2860 turbo
15 psi 288 pulling hard thru 8700 rpm 2876 turbo again this is not an e torch. and its got .100 squish 11.1 comp..
now the 2015 800 137 etech WILL BE THRASHED at Jims by me when the 15s come in. I am buying one for myself and using it for all of the world to see exactly what is there from 7 psi thru 25 psi for the real low altitude rider and lake racers. I will compare 2871, to 3076 as well.
It will be fun to see if this thing can run as well as the old 800 non ho.
the ho is a pooch compared to the non ho on boost...POOOOOCH !!!!
the one test on jims site is a 2860, using dobeque controls. 230 ish is whats in the torch turbo at seal level 7 psi.
There is NO gain for anyone to play with correction factors.
all one needs to back up any dyno test is fuel lbs pr hr and the bsfc.
then no amount of manipulated corrections can fool anyone..
it takes airflow to make torque, psi of boost is a factor but falls out of accurate measure when you are working with small turbo,s or NA high or wide port timings.
fwiw. we have some dyno work on the ho and non ho 800 doo with the 2876 and 2860. carbed of course. same sled just comparing turbos. and of course its seal level so the base compression has been lowered which drops the NA power base line thus lowering the total power output by said amount.
15 psi for us was 263 falling off hard at 8400 rpm 2860 turbo
15 psi 288 pulling hard thru 8700 rpm 2876 turbo again this is not an e torch. and its got .100 squish 11.1 comp..
now the 2015 800 137 etech WILL BE THRASHED at Jims by me when the 15s come in. I am buying one for myself and using it for all of the world to see exactly what is there from 7 psi thru 25 psi for the real low altitude rider and lake racers. I will compare 2871, to 3076 as well.
It will be fun to see if this thing can run as well as the old 800 non ho.
the ho is a pooch compared to the non ho on boost...POOOOOCH !!!!
the one test on jims site is a 2860, using dobeque controls. 230 ish is whats in the torch turbo at seal level 7 psi.