impeller touchdown
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
impeller touchdown
just trying to get thoughts from people...vortech t trim with less than 1500 miles on it...8 inch crank with a 2.95 pulley. bounced off the rev limiter at 6500 last night....is that enough to cook this thing??? or should I be looking at other stuff like lack of oiling??? car had a low oil pressure problem under load load but problem was fixed with installation of restricted pushrods. Any way the loss of oil pressure could cause lack of oil to the supply line for the blower?
thx
thx
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
Time to use a pulley that's a little closer to vortech max impeller speed
What a nightmare!! 2nd blower in 2 years!
Melting Slicks
Joined: Jul 2008
Posts: 3,002
Likes: 216
From: Houston Texas
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Is 52,000 rpm the safe efficient max? It sounds like your blower is engine oil fed. The bearing for the impeller rides on a wedge of oil that separates the bearing and bearing race. If you had any oiling issues at full tilt, the loss of oil could have caused enough additional movement/clearance to allow the impeller to touch the housing.
You can either go to a bigger blower, put a larger pulley on to reduce impeller rpm or reduce engine rev limit. I would also possibly look into why you had to install restricted pushrods to increase oil pressure.
You can either go to a bigger blower, put a larger pulley on to reduce impeller rpm or reduce engine rev limit. I would also possibly look into why you had to install restricted pushrods to increase oil pressure.
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Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
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Joined: Nov 2012
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Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
Btw I the blower is a v2 so I'm not sure if the math changes
Supporting Vendor
Joined: Nov 2012
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Yes i did....Plenty of Oil is coming out at idle....i wasn't thinking the pushrods are causing an issue...I was thinking the loss of pressure last year was also causing lack of oil to the blower feed line...starving the bearing at high rpm eventually leading to this failure.
Btw I the blower is a v2 so I'm not sure if the math changes
Btw I the blower is a v2 so I'm not sure if the math changes