zoomies?, top fuel run em, they seem to run pretty good too, how many drag racers run straight headers ? not much different, backpressure isnt good on a full on wide open throttle, high rpm engine
no foul here beer check , i knew what you were saying .
see here is the deal . while many very high performance engines today run electronics . those electronics are set up for that engine . Very few to NONE need back pressure to make the sensor work
you dont need all the Bla Bla that a factory engine comes with .
the more sensors you have obviously the better one can tune the engine through the ECM . But that doesn’t mean the engine will not run without them . for that mater the ECM will adjust things with only minimum sensors.
When I converted my first engine to TBI , I only ran the map , O2 ,, temp and oil . that’s excluding the TPS and such that the TBI needs . I used a WY ECM with the matching harness . a TBI that came from an engine that was as close as I could get in displacement and I cut out ever wire that did was not needed for the components I was running .
That did away with about 75% of the size of the harness .
The engine runs fine with just those and it throws no codes past a code 12.
But I don’t have to pass emissions tests either
However when you start adding in all the other hogwash that is used for factory emissions equipment , IE , EGR’s , Canisters . Vac filters and such . then things can go a foul in a hurry if those items don’t get what they need to work properly .
As such a smart person will do alittle research and proper backwards planning prior to a modification
IE a cause and effect. by asking one’s self ; self , if I modify A , will it have any effect on B.C.D, E .
If the answer is no to all but E then one should ask ; self do I need E and if I get rid of E , will it effect B.C,D. if the answer is NO then Yank that Bugger out of there
“Notice ,,, Laws permitting of course “
If the answer is yes it will effect BCD then one needs to ask , do I need BCD .
If the answer is no , then get rid of all of them .
But if the answer is yes
? Then one needs to consider not doing the modification to A
There is frankly so much baloney on factory cars that’s not needed for an engine to run , its un real . Heck , depending on the distributor electronics you don’t even need an ECM if your running a carb and emissions isn’t a factor and you can keep the electronic dizzy
However when those things are not taken into consideration when doing a modification , then they can and often do effect how the engine runs .
Who needs all those vacuum lines ? All one really needs is just a crank case breather / vent .
Of course unless something else runs of those vacuum lines or is engineered so as to work properly while sharing vacuum
