Flutter Problem
#1
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Flutter Problem
I have a 03 Evo 8 with bolt ons and seems like I have a flutter problem.
low rpms and at full wot no problem with flutter but when im on partial throttle in boost (from 3.5k and up) my car seems to flutter until I back off or step on it.
I don't really feel it buck when it flutters, maybe slight.
my mods are intake, muse o2 dump, catless dp, catback, greddy bov, ets licp.
No known boostleaks, It was tuned at 25psi
Heres a video of the flutter and wot
http://www.youtube.com/watch?v=7Dc07...ature=youtu.be
Any inputs would be appreciated.
thanks
low rpms and at full wot no problem with flutter but when im on partial throttle in boost (from 3.5k and up) my car seems to flutter until I back off or step on it.
I don't really feel it buck when it flutters, maybe slight.
my mods are intake, muse o2 dump, catless dp, catback, greddy bov, ets licp.
No known boostleaks, It was tuned at 25psi
Heres a video of the flutter and wot
http://www.youtube.com/watch?v=7Dc07...ature=youtu.be
Any inputs would be appreciated.
thanks
#2
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Is your bov greddy-Rs? if so, that's the problem.
Greddy-rs bov is known as 'arguably the best bov on the market.' LOL. No matter what you do, you will still have a problem.
If you search 'greddy bov flutter' on google, you will find a ton of thread.
Greddy-rs bov is known as 'arguably the best bov on the market.' LOL. No matter what you do, you will still have a problem.
If you search 'greddy bov flutter' on google, you will find a ton of thread.
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#9
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thanks for all the inputs
i have a gm 3-port installed
i do have a greddy type-s, came installed when i bought the car.
I'll be picking up a evo 9 dv, hopefully that gets rid of the problem
i have a gm 3-port installed
i do have a greddy type-s, came installed when i bought the car.
I'll be picking up a evo 9 dv, hopefully that gets rid of the problem
#11
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searching through the forum, some people say its normal
"Partial throttle flutter. I think it's the mid way point between spooling like the bov is partially open to reduce surge. So basically step on it!"
"Gotcha. Just found some info that says part throttle/partial throttle fluttering is the valve compensating for pressure inconsistencies. It said flutter @ WOT is compressor surge"
is this true?
"Partial throttle flutter. I think it's the mid way point between spooling like the bov is partially open to reduce surge. So basically step on it!"
"Gotcha. Just found some info that says part throttle/partial throttle fluttering is the valve compensating for pressure inconsistencies. It said flutter @ WOT is compressor surge"
is this true?
#15
Evolving Member
I've got the same problem,needless to say it's worse now with the new turbo...
HKS Sq dump valve here,it's recirculating into the intake manifold.
Perrin 3-Port Bcs.Is this bad for the turbo or not? Because it doesn't really bother me,i've learnt to drive it on or off boost.
HKS Sq dump valve here,it's recirculating into the intake manifold.
Perrin 3-Port Bcs.Is this bad for the turbo or not? Because it doesn't really bother me,i've learnt to drive it on or off boost.