Damper question.
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Senior Member
Joined: Dec 2010
Posts: 993
Total Cats: 57
From: Auckland, NZ
Damper question.
We haven't purchased an ATI or equivelant damper for our race motor yet.
We ran the 1600 turbo pretty succesfully for the past 4 years without and now with the 1800 had 4-5 succesfull race meetings.
It seems MT.net strict rule is to run one.............What is the typical failure of NOT having aftermarket damper?
We ran the 1600 turbo pretty succesfully for the past 4 years without and now with the 1800 had 4-5 succesfull race meetings.
It seems MT.net strict rule is to run one.............What is the typical failure of NOT having aftermarket damper?
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Senior Member
Joined: Nov 2016
Posts: 501
Total Cats: -8
From: Chicago
http://www.fluidampr.com/news/new-fl...s-engine.-135/
Seems another alternative with MSRP of $490. Should hopefully get good reviews and lower price.
Seems another alternative with MSRP of $490. Should hopefully get good reviews and lower price.
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ʎpunq qoq
Joined: Jan 2014
Posts: 604
Total Cats: 202
From: Western Australia
I've posted this before but I don't run an aftermarket damper or a billet oil pump. I actually run an oem damper that has been cut down to around 2/3rds the weight (accessory ribs removed). My engine revs to 9k and my bearings are perfectly happy now that I run a sump baffle.
The theory of several top engine builders in Australia is that the oil pump gears fail when the oil pressure return valve chatters due to high revs and high oil flow. This puts backpressure on the oil pump gears and they blow apart. If you install an external oil pressure relief valve (Peterson makes one) with much larger diameter flow and close up the return valve in the oil pump, then the stock pump and balancer is fine. You also get the benefit of being able to externally adjust the oil pressure to suit your needs. If you are already running an external oil cooler the plumping is pretty simple, though you do need to tap the sump with a 10AN fitting for the oil return.
Buying a harmonic balancer, and billet oil pump is the MT.net recommended option. Alternatively buy a external relief valve and you can join the few of us who don't run anything extravagant. Of the 10 or so cars I've seen running this setup, none have failed oil pumps or cranks.
Having said all that.... I just picked up an unused Boundary high flow pump and a Supermiata damper 2nd hand. They were a good price so I couldn't resist. At some point they will both go on my motor because I like more oil pressure for cold starts and the Supermiata damper is actually lighter and looks nicer than my 25 year old cut down damper.
The theory of several top engine builders in Australia is that the oil pump gears fail when the oil pressure return valve chatters due to high revs and high oil flow. This puts backpressure on the oil pump gears and they blow apart. If you install an external oil pressure relief valve (Peterson makes one) with much larger diameter flow and close up the return valve in the oil pump, then the stock pump and balancer is fine. You also get the benefit of being able to externally adjust the oil pressure to suit your needs. If you are already running an external oil cooler the plumping is pretty simple, though you do need to tap the sump with a 10AN fitting for the oil return.
Buying a harmonic balancer, and billet oil pump is the MT.net recommended option. Alternatively buy a external relief valve and you can join the few of us who don't run anything extravagant. Of the 10 or so cars I've seen running this setup, none have failed oil pumps or cranks.
Having said all that.... I just picked up an unused Boundary high flow pump and a Supermiata damper 2nd hand. They were a good price so I couldn't resist. At some point they will both go on my motor because I like more oil pressure for cold starts and the Supermiata damper is actually lighter and looks nicer than my 25 year old cut down damper.
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Senior Member
Joined: Nov 2016
Posts: 697
Total Cats: 91
From: Los Angeles, CA
I've posted this before but I don't run an aftermarket damper or a billet oil pump. I actually run an oem damper that has been cut down to around 2/3rds the weight (accessory ribs removed). My engine revs to 9k and my bearings are perfectly happy now that I run a sump baffle.
The theory of several top engine builders in Australia is that the oil pump gears fail when the oil pressure return valve chatters due to high revs and high oil flow. This puts backpressure on the oil pump gears and they blow apart. If you install an external oil pressure relief valve (Peterson makes one) with much larger diameter flow and close up the return valve in the oil pump, then the stock pump and balancer is fine. You also get the benefit of being able to externally adjust the oil pressure to suit your needs. If you are already running an external oil cooler the plumping is pretty simple, though you do need to tap the sump with a 10AN fitting for the oil return.
Buying a harmonic balancer, and billet oil pump is the MT.net recommended option. Alternatively buy a external relief valve and you can join the few of us who don't run anything extravagant. Of the 10 or so cars I've seen running this setup, none have failed oil pumps or cranks.
Having said all that.... I just picked up an unused Boundary high flow pump and a Supermiata damper 2nd hand. They were a good price so I couldn't resist. At some point they will both go on my motor because I like more oil pressure for cold starts and the Supermiata damper is actually lighter and looks nicer than my 25 year old cut down damper.
The theory of several top engine builders in Australia is that the oil pump gears fail when the oil pressure return valve chatters due to high revs and high oil flow. This puts backpressure on the oil pump gears and they blow apart. If you install an external oil pressure relief valve (Peterson makes one) with much larger diameter flow and close up the return valve in the oil pump, then the stock pump and balancer is fine. You also get the benefit of being able to externally adjust the oil pressure to suit your needs. If you are already running an external oil cooler the plumping is pretty simple, though you do need to tap the sump with a 10AN fitting for the oil return.
Buying a harmonic balancer, and billet oil pump is the MT.net recommended option. Alternatively buy a external relief valve and you can join the few of us who don't run anything extravagant. Of the 10 or so cars I've seen running this setup, none have failed oil pumps or cranks.
Having said all that.... I just picked up an unused Boundary high flow pump and a Supermiata damper 2nd hand. They were a good price so I couldn't resist. At some point they will both go on my motor because I like more oil pressure for cold starts and the Supermiata damper is actually lighter and looks nicer than my 25 year old cut down damper.
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ʎpunq qoq
Joined: Jan 2014
Posts: 604
Total Cats: 202
From: Western Australia
Failure is definately not from centrifugal forces. My stock pump spins to 9k constantl and once to 10,500 on an over rev. Oops. That's what happens when you hit 3rd instead of 5th with a dog box shifting at 8600rpm.
Failure may occur from crank deflection in big horsepower cars deflecting the crank enough to cause contact between the gears. But I think bearings will go first? Maybe.
Failure may occur from crank deflection in big horsepower cars deflecting the crank enough to cause contact between the gears. But I think bearings will go first? Maybe.
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