Video of roots blower setup on F-Body
Finally figured out what's causing the false knock, it's the loud *** exhaust!! I had the timing so low in boost that when it went into boost the exhaust tone would change drastically and would get really loud and that would set off the knock sensor. All I did was add more timing in boost and that quietened the exhaust down and she runs quite well now. I've ran the **** out of it the last couple days and haven't got a bit of knock except one time down low in the rpm range, lugging territory. 1st and 2nd gear is basically useless now with those lil street tires, it spins forever. lol Can't wait to get a good tune in it and see what it puts down on the dyno.
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Verdad Gallardo http://www.tnfbody.com/forum/showthread.php?t=7512
Thread Starter
TECH Enthusiast
Joined: Sep 2004
Posts: 595
Likes: 0
From: Clarksville,Tn
So yers will be out of commission for awhile waiting. That sucks but trust me I know how it feels. Mine has basically been in the garage with the hood up for 2 years while I built this setup. I'll be glad when the tracks open up around here so I can get a time on this car.
TECH Apprentice
Joined: Jun 2004
Posts: 318
Likes: 52
From: Charleston, SC
one more thing to note. Go to page 65 on this pdf for that blower. http://www.holley.com/data/Catalogs/Superchargers.pdf
You will find this note.. Roots blowers generally are used with carburetors or throttle body
fuel injection systems. Roots blowers are designed to work with fuel
passing through them and are not intended to be run “dry.”
Centrifugal superchargers typically run dry and are positioned in the
inlet stream ahead of the carburetor or fuel injection system. This is
why centrifugal superchargers are commonly found on late model
engines which use port type injection systems. Roots blowers, as a
result of the supercharger’s configuration, are not practical for use
on port injected engines."
The Teflon coating they put on the rotors gets warm if nothing cools it down.......
You will find this note.. Roots blowers generally are used with carburetors or throttle body
fuel injection systems. Roots blowers are designed to work with fuel
passing through them and are not intended to be run “dry.”
Centrifugal superchargers typically run dry and are positioned in the
inlet stream ahead of the carburetor or fuel injection system. This is
why centrifugal superchargers are commonly found on late model
engines which use port type injection systems. Roots blowers, as a
result of the supercharger’s configuration, are not practical for use
on port injected engines."
The Teflon coating they put on the rotors gets warm if nothing cools it down.......
