Flyin' Miata ATI Harmonic Damper

bear2230 · Postby **bear2230** » Sun Jul 01, 2012 7:46 pm

Hi All,

Anyone here rumming one of these on their cars?
Opinions?
http://www.flyinmiata.com/index.php?dep ... %201991-95

Richard

timk · Postby **timk** » Sun Jul 01, 2012 8:47 pm

Hi Richard,

I had my rotating assembly balanced and used an OEM harmonic balancer. Those ATI harmonic balancers are meant to be good but not keen on having to "maintain" something like that.

Cheers

Hellmun · Postby **Hellmun** » Mon Jul 02, 2012 8:16 pm

I went the boundary racer pump instead, fixes the same problem and you can run higher oil pressure which hopefully is even better for track work. http://boundaryengineering.com/drupal/node/36. Not cheap though.

bear2230 · Postby **bear2230** » Mon Jul 02, 2012 9:27 pm

Hellmun wrote:I went the boundary racer pump instead, fixes the same problem and you can run higher oil pressure which hopefully is even better for track work. http://boundaryengineering.com/drupal/node/36. Not cheap though.

I was always planning on running with the street/strip pump and the ATI but I'm erring away from the ATI and just running the stock damper now. There must be a good reason that FM use the ATI in every motor they build though and CT is a big fan of them also.
I think full racer pump might be a bit extreme for my car. I will have a talk to Daniel tomorrow and see what he thinks. I have to order some ARP main and head bolts so it is another excuse to take advantage of the Aussie dollar. If the Arias pistons are still a while away I might get the FM Weiscos at the same time.

sailaholic · Postby **sailaholic** » Tue Jul 03, 2012 6:37 am

The oil pump problem can be solved with better flowing relief valve or an external one.

Sent from my GT-I9100 using Tapatalk 2

Postby **NitroDann** » Tue Jul 03, 2012 1:00 pm

What wozzah said.

Also the race pump is to eliminate pump breakage not improve oil pressure. Also oil pressure doesnt save engines, oil flow does. A stock pump already gives far too much pressure, hence the pump breakage.

Dann

bear2230 · Postby **bear2230** » Tue Jul 03, 2012 6:39 pm

OK, Spoke to Daniel and he its says not needed for a street car running 12psi. Also going to use standard main and head bolts not ARP as I planned. Seems that pretty much everything I thought I needed, I didn’t.
Can It be he knows more about engines than me?

Richard.

Hellmun · Postby **Hellmun** » Tue Jul 03, 2012 8:39 pm

Sounds good Bear, Daniel is the one building my motor too.

Also the race pump is to eliminate pump breakage not improve oil pressure. Also oil pressure doesnt save engines, oil flow does. A stock pump already gives far too much pressure, hence the pump breakage.

If the flow path size/shape is unchanged then an increase in pressure should see a corresponding increase in flow. I wasn't concerned that stock pressure was low when under load. I figured that the drop-off under high-G braking in pressure would instead change from say 80psi -45psi to say 94psi -59 psi as a overly simplified example.