Factory Borg Warner S300G

[TJarecke]

Is there a good reason not to use a factory Borg Warner S300G? There are a lot of good turbos out there that are modified S300G's at double the price or more than the factory unit. Are they twice as good? Comparing this to a HTB2 or II PS62, not the 64-66 sizes.

If the S300G shouldn't be used, can the factory K31 be used on the street, or is it just for a heavily fueled race/sledpulling truck?

There are some people talking about these turbos but not many. Shouldn't we be looking at our options?

 

[TJarecke]

The little I have found on the K31 says with the small exhaust housing they surge bad. I don't know what housings are available for it though.

No one with a factory off the shelf S300G?

 

[TJarecke]

I was under the impression that you could get one with a 61mm comp wheel. I am kind of supprised with almost 30,000 members that no more than just one guy has tried these turbos.

 

[TJarecke]

Now it looks like I am talking to myself because the other two replies were removed?

 

[Mike B.]

now that does look silly doesn't it. .

 

[TJarecke]

Actually it does! It didn't look so silly when my posts were broken up by a post by another member. I am not crazy, , really I'm not!

 

[rkdblacksmoke]

I too want to know more about the k31, have been told by reputible source it will surge bad under the right conditions, but is a good turbo if your set up properly. Someone please speakup with what you know about these turbos.

 

[TORQUE THIS]

I was told that a off the shelf 300 is junk...

They need to be modified, what is modified, I couldn't tell ya... (top secret)...

What were in those posts that are no longer there????

 

[rkdblacksmoke]

Just spent about 5 hours at industrial injection yesterday during a little local gathering, its no secret all the hot turbos lately are based of the s300 series, after talking with them down there I gained a greater apprication of why these turbos cost so much and why they are better. Obviously they did not really go into a whole lot of detail about specific mods they do to there turbos to make them work so well, but they told us that the man hours on one ps62,64,66 turbo average between 3-5 hours. By the time they do necessary machineing, balancing and get it all put together,not to metion all the time they spend figureing out what combination of turbo parts work well together, prior to this my thoughts were just a really exspensive turbo, now I feel your just paying for well put together top notch product. You could probably get standard s300 and it would work ok, but would you get full potential I don't think so. Just remember you get what you pay for. I would call II or HTT and ask them what makes there turbos better, both shops are very good to deal with and willing to try and help understand what you need.

 

[TJarecke]

I am aware of the products. My brother has an HTB2 on his '99. It has worked really well so far. Many people buy these turbos to be an upgrade but don't ever push them as far as others do. Wouldn't the off the shelf turbos be a good turbo for these type of driver. If we can push our factory Hx35 as far as we do couldn't we push these "better built" turbos too? The factory S300G would cost as much or maybe less than an Hx40 and you would have the better shaft and maintain the 4 inch outlet and the wastegated housing.



Did the manufacturers selling the updated turbos say they are junk? If they are junk, why base your turbo line on them?



The other posts stated that he was using the K31 with a 22 exh. as a primary in twins, and that it would take a lot of fuel to spin one because it flows about as much as an HT3B. Tha was the jist of it anyway.

 

[rkdblacksmoke]

Gees not trying to start a fight here just stating I gained a new appreciation for cost and quality of the hybrid turbos, try ebay I saw 2 s300's on there in about the last two weeks, seems like they went for about 6-650 each brand new, might work well for you. I got the gist of the k31, though you can use it effectively as a single with the right exhaust housing and right amount of fuel. Just trying to help you out not pi$$ you off.

 

[RonA]

The K31 has a 71mm compressor wheel. That's a bit large to run as a single in a daily driver. I am running a generic S300 with a 62mm comp wheel and a . 7 exhaust housing as a secondary. I would like to send it to Industrial Injection for upgrading. It would be interesting to see the difference.

 

[TJarecke]

I have not been upset about any post on this topic. I am just trying to get honest opinions on things not the same info as the rest of the posts on this size of charger. I know their turbos are great, like I said the HTB2 has worked really well. I am just trying to get some ideas on other turbos.

I have the part number for the S300G that I think will work for our applications, and a place to get them for less than $700. The turbos on ebay both went for over $700. I just wanted more opinions or experience.

Anybody looked at the S310s either?

There is also another turbo out there from forcedinduction.com. It is called the sss-62. It is a S300 based turbo with a garrett wheel on it. They also make 64,66 and a working on a 68. Prices are comparable to the other vendors with similar turbos.

Thanks RonA for your posts, you seem to be the only one that has first hand experience with the chargers.

rkdblacksmoke, Sorry if I made it sound like I was attacking your post, I had no intention in this what so ever.

 

[JStieger]

a/r ratio?

A bit off-topic, but maybe not (??) - what exactly is a/r ratio? 0. 7, 0. 8, etc? The higher the ratio, the faster the "quick spool"? I'm just curious because some people quote this ratio instead of exhaust housing size per se. Probably since 14 cm (for example) means different things to different turbo manufacturers?



I know it has something to do with housing radius and such...

 

[jkidd]

Ar

the larger the # like . 7, is smaller than . 8

a . 7 would spool faster. I think a . 66 is similar to a 14cm2

 

[Bernhard]

I too have been wondering about this. I am useing a HX-40/16 just a off the shelf unit. I am also using nitrous but I am afraid to of the jetting because I don't want to thrash the turbo. So I have been looking into other options, what can you get for a compressor wheel on a stock S300? I need another turbo on a budget!







Thanks

Brenden

 

[RonA]

I believe the . 7 housing is what they are calling a 12, but is actually like a 12. 5 or 12. 7. The . 8 is what they are calling a 14. So a 62/12 would be a 62mm inducer on the compressor wheel with a . 7 housing. A 66/14 would be a 66mm inducer with a . 8 ar housing.

 

[RCenters]

A s300G is a really good charger off the shelf the ones that sell for 700$ usally have a 57mm wheel(not all) most of these other companys add there wheels(still from borgwarner) and covers from B/E ( borg warners r/d support shop) and sell it as there own . . there great butt if u can get a hold of the one off wheels from borgwarner then u have something



Im having a S300G with custom wheel and housing for nearly half of a Kb-2

 

[TJarecke]

Thanks RCenters for the reply. That is the kind of mentality I was going for with this post. I think I am going to go this direction with my 97 also. I have a p/n for an turbo that is supposed to be a 61mm inducer for under $700. I will hopefully have the money and some other fueling upgrades by spring and I will try to dyno the combo.

 

[Diesel Freak]

which S300?



there are four versions in my catalog.



Two different compressor wheels, anf two different turbines



here is the bigger 61mm 49 trim wheel