jmann

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

18psi

iTrader: (76)

air cooled? you mean oil cooled?

thenuge26

iTrader: (2)

Can you buy an EFR6758 with no wastegate? I thought they only sold those to Indy teams? Also the point of the EFR is that the internal wastegate is much improved so you don't need an external one.

Savington

iTrader: (31)

There is absolutely no reason to run an external gate with a BorgWarner EFR. The internal gate on the BW is as good or better than any external gate setup available.

jmann

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.

Leafy

iTrader: (1)

They do actually say air cooled on their website.

TurboTim

iTrader: (9)

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.

jmann

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

mr_hyde

iTrader: (4)

What are the approximate price differences including shop labor for welding/fab between the Precision option vs the EFR? I'm not ready this winter (cost), but I don't know if my little MSM turbo is going to survive another summer.

TurboTim

iTrader: (9)

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.

TurboTim

iTrader: (9)

They said the PT5558CEA would be a good fit for your engine size/boost level/whatever? I would love to see that on your car

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.

jmann

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.

TurboTim

iTrader: (9)

No, I'm too scared to put my car on the track. The Precision turbo isn't installed yet either. Still in the box waiting for time to finish the intercooler plumbing.

404 - Gaz

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.

18psi

iTrader: (76)

on a track car I'd lean toward the bigger hotside

acorn

iTrader: (2)

I cannot speak from personal experience but I know of 3 people who were using Precision turbos for street use on various cars and all of them had smoking issues. Even with proper oil drains, adequate crankcase ventilation, and proper oil.

jmann

It can be some other reason then the turbo. Its pretty amazing that you knew of 3 of these being used on the street.

acorn

iTrader: (2)

600hp s2000, 450hp gti, a turbo 5.0 mustang. All fixed their smoking problems by ditching the precision turbos. Just makes me a bit leery.

jmann

Huh That does give one pause. How long ago was this? Did you all ever make a determination on the cause. It has to be leaking seals don't it? Thanks for the info.

thenuge26

iTrader: (2)

I would be interested in a Precision if not for Soviet's thread. Once you see that dyno sheet, you won't care about anything but that EFR.

I'm not saying I am rubbin one off to it at the moment, but that may have happened in the past...