Precision turbo
#1
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Precision turbo
Does anyone out there use a Precision turbo for the track? I have a track only car and it gets run very hard and I would like to find out if the ceramic bearing housing, air cooled ones hold up on hard track use. No water lines needed. All I see on their site is mostly drag cars. I am going to go bigger [precison 5558, garrett 3170, borgwarner 6758]over the winter with a external waste gate and am looking at all options. I pretty much know the others but the air cooled ceramic Precision I can't find much out about when it comes to hard track time. Thanks
Last edited by jmann; 11-28-2012 at 08:36 PM.
#5
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Thanks, I didn't know that about the borgwarner turbo.
18psi Sorry I wasn't clear, the center bearing housing is air cooled, not the bearings themselves as the ceramic bearings are supposed to be better and yes they are still lubed with oil.
18psi Sorry I wasn't clear, the center bearing housing is air cooled, not the bearings themselves as the ceramic bearings are supposed to be better and yes they are still lubed with oil.
#7
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What did Precision say when you called them and asked about roadcourse reliability, and your application/engine size/etc? Like some other companies at their level, they would rather tell you to not use their product than sell you something and have it fail.
I do know a few Bonneville cars which run their turbos. Not the same as a road course situation but closer than a drag car.
The ported S cover is like woah big.
I do know a few Bonneville cars which run their turbos. Not the same as a road course situation but closer than a drag car.
The ported S cover is like woah big.
#8
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They said that the ceramic bearing one would hold up fine and I'm sure it probably would if they say it well. I just can't seem to wrap my head around an air cooled center housing on a track car that is getting really hot for an extended period of time, but I do like the idea of having no water lines and their turbos are supposed to be pretty awesome so I was just wondering if anyone has any personnall experience with them on here, doesn't look like it. You make a very good point about them wanting to keep their rep. in good standing though. Thanks
#10
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BW EFR IWG manifold & downpipe would be a lot cheaper than Precision Ceramic BB w/EWG.
I don't have the cost of the BW, but retail on the Precision with the ceramic BB is $1600. Add either $250 for a tial MVS, or $350 for the Precision PW46, and the extra cost to fab the EWG dump (which cost would vary depending on if you just want it to dump to ATM or blend in with a slip joint and flex, etc). The only downside to the EFR might be the overall length and bolted connections (vband housing is a no cost option on the Precisions, but the clamps aren't free), but on a race manifold (like Trackspeed's I predict) that is a non issue.
I don't have the cost of the BW, but retail on the Precision with the ceramic BB is $1600. Add either $250 for a tial MVS, or $350 for the Precision PW46, and the extra cost to fab the EWG dump (which cost would vary depending on if you just want it to dump to ATM or blend in with a slip joint and flex, etc). The only downside to the EFR might be the overall length and bolted connections (vband housing is a no cost option on the Precisions, but the clamps aren't free), but on a race manifold (like Trackspeed's I predict) that is a non issue.
#11
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They said that the ceramic bearing one would hold up fine and I'm sure it probably would if they say it well. I just can't seem to wrap my head around an air cooled center housing on a track car that is getting really hot for an extended period of time, but I do like the idea of having no water lines and their turbos are supposed to be pretty awesome so I was just wondering if anyone has any personnall experience with them on here, doesn't look like it. You make a very good point about them wanting to keep their rep. in good standing though. Thanks
I hear ya about the air cooled CHRA. That took me a while to accept too, but I still worry about it.
I am quite impressed with the apparent build quality of my PT5858CEA and PW46, machine work, casting, fit n finish...it's a step up from Tial stuff, which is three steps up from Garrett stuff.
#12
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Thanks Tim Have you had your car on the track much? Sounds like you are very impressed with their build quality I have been on the phone to some shops that run the Pecision turbos on the track and they say there are no issues with them being air cooled, and no water lines. Also I found out air cooled means the housing is out in the air, there are no wind vanes or openings for enhanced air cooling. In someways 18PSI is correct in that they are mainly oil cooled I beleive. Also found out that some Evos use precision and was told there are many cars that use non water cooled turbos.
#14
I am keen to see the results on this Turbo as I am looking at either a 5558 or a 5858. What I am also keen to find out is how the .48 / .63 / .84 relationships go. I have tried sweeping the web to see if their is any detailed reviews but I may end up checking the flow rate maps (not that I know what I am looking at would ask for advice). I am keen on the .48 if it isn't going to choke up the 5858.
It is always under a lot of debate...ie stay inside of you boost range and go .84 for more hp. Others prefer the neck snapping torque when a .63 come on.
It is always under a lot of debate...ie stay inside of you boost range and go .84 for more hp. Others prefer the neck snapping torque when a .63 come on.