jimbo486

i ran across an ad on craigslist about this one. unfortunately we can't post links to them but hopefully i can provide some info on it and get some opinions. it's a reman'd borg warner from bullseye performance, has a t-3 flanged .7 a/r housing (approx. 10cm2, awfully small!) with a 4" v-band outlet. the rest of the ad reads:

"Featuring BorgWarner’s unique Extended Tip compressor wheel technology (for fast spool up) and low inertia, full-floating journal bearings, these turbos utilize a dual-volute T-3 turbine housing which utilizes low rpm exhaust pulses for improved turbine response. The dual-action waste gate bleeds off turbine drive pressure from both volutes if excessive boost temperatures are experienced. BorgWarner turbo also feature a heavy-duty waste gate actuator that prevents pre-mature opening caused by high exhaust turbo drive pressure thus resulting in quicker spool up and more power!"

what concerns me is that bullseye performance is aimed towards the imports and according to their website this is basically a 62/67. i called the seller and talked for about 15 mins. he seems to know his stuff, comparing it to h1c's and hx-35's and such. he says it's genuine and was reman'd about 2 years ago. i didn't get a chance to ask if it's been run since though. having such a small turbine housing, i'm wondering if i could even find a replacement 12cm or 14cm for it. i know of one borg warner dealer here that i could probably call and speak with. i think i'll meet up with the seller after i get off work and at least look at it up close. what do you think??

The_Head

What is the price? Looks pretty decent to me.

jimbo486

he's asking $800 for it. i think it's a steal since they run about $2100 new!

unixcowboy

Before you think it's a steal check on getting a larger exhaust.
I'd look for about 1.3 - 1.4 A/R - that should be ~ 14cm - 16cm.
AND don't forget - you'll need a new wheel to fit the new housing.

OH - and they'd better be balanced..

AND ....

that's about all I can think of offhand

soggy

I would buy it and throw it on just how it is, should work great for your amount of fuel, may even want to add more. There are lots of guys very happy with the HE351, which has a smaller exhaust housing and wheel. I'm not sure about the A/R to cm2 ratio, but according to the folks at Industrial Injection .8 equals 14cm2 on the silver bullet. The most common S475 housing for a primary in a compound application is 1.32 A/R.

Crossy's son

I hear its almost impossible to converter A/R to CM^2

But this old thread says .69 A/R = 12cm which makes more sense than 10cm which i've never heard of.
http://www.4btswaps.com/forum/archiv...hp/t-2392.html

I'm pretty sure that turbo may be a 62/65/12 which is pretty popular and a sweet setup!!

dieseldawg604

taken from another site

6cm2 = 0.41 A/R
7cm2 = 0.49 A/R
8cm2 = 0.57 A/R
9cm2 = 0.65 A/R
10cm2 = 0.73 A/R
11cm2 = 0.81 A/R
12cm2 = 0.89 A/R
14cm2 = 0.97 A R
15cm2 = 1.05 A/R
16cm2 = 1.13 A/R
17cm2 = 1.29 A/R
19cm2 = 1.37 A/R

but who knows!!!!

soggy

http://img8.imageshack.us/img8/5051/ar0fd.png

It is impossible to convert cm2 to A/R ratio so that it will be the same on different sized turbos. A 12cm2 housing will always be a 12cm2, whereas an A/R of .8 could be different sizes (in cm2) depending on the area of the exhaust inlet and the size of the turbine wheel as the picture explains.

JustRamIt91

shouldn't there be both then? since its two different measurements??? like a 12cm2 @ .7AR?? or something like that Reminds me of surface area vs. volume

jimbo486

i looked at it earlier today. it's a good looking turbo! it was reman'd 2 years ago and never been run. it was very clean!

as for turbine housing, although it has .70 stamped on it, it looked like it was a decent size. i'm still not sure about it though. according to bulleye's website, it lists as a 62/67 with the .70 a/r housing:

Turbocharger Name - S362
Compressor Wheel Inducer - 62mm
Compressor Wheel Exducer - 80.6mm
Compressor Wheel Trim - 54
Turbine Wheel Inducer - 76.3mm
Turbine Wheel Exducer - 67.6mm
Turbine Wheel Trim - 79
Turbine Option - Outlet - V-Band
Turbine Option - Inlet - T3
Turbine Option - A/R - 0.70
Horsepower Rating - 350-680

i think brandon's right. the more research i've done and the more pictures i find, the more it's starting to look like a 12cm. bullseye definitely makes turbos for us cummins guys.

Edit: a friend just found some info. told me the .7 IS the equivalent to a 12cm. this could be a good thing fellas...!!

Rick 12v CTD

looks kinda like a 62/68/12. A nice turbo for $800

JQmile

I'd do it. OC is near sea level so you shouldn't have to worry too much about it surging, and as long as you don't wind the engine out, I wouldn't think you'd overspeed it.

jimbo486

what do you guys think about the 12cm being a little small for having a 68mm wheel in it? i've been told it may be a little choking having the larger turbine wheel stuffed in there.. i've never heard of a 62/68 s300. and would the wheel really have to be changed if the housing is changed also?? that's money i'd rather not throw at it if i'm already dropping $800 on it. the compressor outlet seems kind of long and i'm thinking it might hit the inner fender well and fitting 3" tubing to it. i could easily reclock it but i think the charge pipe would look like a snake in order for it to mate with the i/c. at the moment, it's a little out of my budget. i just paid my insurance and other bills are coming up soon as well. i may need to put certain mods on hold for a while. it can be hard to spend money at times when you're in debt with parents. anything can happen though. the seller's only had one other guy call him on it. he's not trying to rush the sale. i'll just save my pennies for a little while and see how funds look in the near future. i'm not turning it down entirely.

JQ, i don't think i even have the fuel to worry about surging. does surging have anything to do with the amount of fuel anyway?? lol

Rick 12v CTD

If I'm not mistaken there are 3 lines of s300 where the exhaust wheels are different sizes

you have the 65mm series. A good example is the 62/65/14 some guys run on our trucks. Then you have the 68mm exhaust wheel and then the 71mm exhaust wheel. I'm pretty sure all come with either the 62, 64, or 66mm compressor side.

I think the 68mm exducer is a moderately newer design that's come out in the last year or 2... Don't quote me on this though...

Crossy's son

"GHLS" has a 5 speed VE pumped truck running mid 13's in the 1/4. He ALWAYS says for trucks under 400hp, the 62/65/14 is perfect. Usually this comes up when someone says something about a 62/71 which is common.

68mm is not that small.....the stock h1c's and hx35's are only 60mm

i think the 68mm is pretty new deal, they never used to have that size.

sounds like a great turbo to me...