SEMA brings us another great announcement. These look very interesting.

http://www.motoiq.com/magazine_artic...ature-set.aspx

And for some of the more intelligent turbo folks, here is the calculator to match up the right compressor/turbine.

http://www.turbodriven.com/performan...bot/index.html

 

pretty neat actually. Full-Race has an article about them on their site. Looks promising.

 

now BW really looks like being full attack on Garrett. The new turbus look fantastic! They seem to be designed and targeted especially for the performance industrie now. Also the previouse criticism of not offering BB turbos will now die. I like the new turbine housings with their completly separated scrolls and long nozzle areas. Compressor housings seem now available with inlets a al HKS, really sweet. Remarkable are also the compressor rerouting as well as the integrated wastegates even on their big boys. I will wait for prices but it looks very likely that one of my next turbos will be a BW (again...).

 

What's the BW EFR equivalent of GT35R T4? My mechanic is a little skeptical about BW turbos (at least the old ones) since he's a Garrett fan, but new ones look promising and like K7zd said looks like specially designed for us revheads.

 

Very interesting, can't wait to check them out at PIR. It's exciting that they'll be using some real technology and materials in these new turbos. Wonder where the price will end up though..

 

they look kinda gay with the bov on the cover

 

And the internet hype begins...

 

honestly they are bad *** turbos and i cant wait to try one out but the bov on the front cover is different and will look kinda funny i think but its not stopping me from buying one and trying it out

 

I was rushing my single turbo project but looks like I'll wait another month and it'll be between a BW EFR and GTX3582R if they'll give better response and more hp.

 

The EFR-9180 is pretty interesting and I'm very interested in it. My only question is, can the T4 divided wastegated housing in 0.95a/r be able to provide enough flow so that we don't overboost*. If it can I think I'm all over it due to the response benefits.

edit - looking into it further, I don't think the EFR-9180 has that option (T4 wastegated)... Boo

thewird

 

Saw these first hand at SEMA this past week, some pretty cool technology went into these.

The wastegate design looks like it should flow pretty nicely. and the weight savings in the exhaust wheel is incredible compared to the older style which is supposed to be good for 800rpm lower spool time in most applications.

They told me expect around $2000 for a 35r equivilant. Pretty damn good value considering you dont need a BOV, wastgate or boost controller anymore.













I had dinner the one night with Geoff from Full Race, he approves of these turbos.

 

Is that a fully divided internal wastegate I am seeing? OMG, why don't they have that EFR-9180 in T4.....

thewird

 

Nice turbo, but the size of that internal wastegate doesn't look like it would "cut it" on a rotory application. Hopefully someone will drop two bills and let us know

 

Yeap fully divided and a nice flow path too, not 90 degree like old ones usually are, these come off each scroll very nicely.

The size of them might be a concern with Rotaries, it does look like you could port them out a slight bit larger.

 

on the turbos that are currently out, the match of hot and cold side is not ideal for rotaries, turbines too small for the compressor wheels they offer. I am convinced, that the product range will increase soon. Also they currenly just seem to cover the full power range between 100-1000HP wihtout real overlap between the models. No too many trims available either. Seems like they concentrated on the most common once requested.

To find out the flow capacity of the turbos, go to their "match box", very nice calculator.

 

KZzd,

The EFR 8374 is almost the exact same size as a TO4Z (or 8474). Sounds good to me.

Barry

 

I'm sure this will be a good product that will serve the needs of many people. But before the nutswinging gets out of control, you need to realize that much of this product is nothing more than a cut-and-paste job of off-the-shelf turbo designs.

Take a look at the factory turbo on the VW/Audi 2.0T engine (which is made by BW I believe):



look familiar? how about the Mitsu-made turbos on the BMW N54 engine?



This is old stuff guys. You have to realize that the OEM's get the good stuff first. BW obviously took the architecture of the 2.0T turbo, deleted the integrated exhaust manifold, and installed Garrett-based turbine inlets. I'm not saying we shouldn't buy the product. Just don't get caught up in internet hype for "gee whiz" features from an engine that came out 5 years ago. I'm not trashing the product. "Copy and paste" engineering is how everything is done unless you have a PhD and work in a lab.

That is a well designed wastegate but I don't see it flowing enough on a rotary. Remember that the series 5 FC turbo had a fully divided housing with a divided internal wastegate and those still creep horribly with an open exhaust. This wastegate is designed better but I bet you would get creep if you weren't running a very stiff actuator spring or running a cat.

T4 internally wastegated turbos are not widely available for a reason. Occasionally you will see an internally wastegated T4-class turbo on a diesel, but diesels generally don't have boost control problems.

 

i do like that last pic of the bw at sema without the bov. the precisions and garretts are nice tho as you can usually find a local place to rebuild them

 

The compressor inducer is 62mm so the turbo is on a different class. The larger exducer will make it more efficient at higher P/R's but not exactly what we're looking for. That's why I was so interested in the EFR-9180 which would be like a T04Z since it has a 67mm inducer but better. The EFR-8374 would probably be a nice turbo for people considering a GT35R-GT40R since it does have a 0.92 T4 divided & wastegated housing. If only we knew if that wastegate could flow enough to run in the 10-16 psi range on a rotary. I don't think it would be an issue if you plan to run higher then that. I wonder if BW has a wastegate equivalent comparison, "it will flow like a 38mm" for example.

thewird

 

I may be rehashing info, but I thought this would be the place to ask it.

I've been led to believe that most ball-bearing turbo's do not stand up well to our rotaries due to the high exhaust gas temps.

On the testing for these new EFR's, they cycle them to 952 degrees 175 times according to the motoiq article.

So do our exhaust temps get this high?

Also, is this finally the single that will approximate as close as possible the feel of instant boost from out troublesome twins?

Thanks

 

Someone has been lying to you


~S~

 

OK,

How about the temps? Would they be an issue, and any suggestions about which turbo would be best for quick boost.

I did drive on my friends car who had a gt-35 single done by a shop in Illinois, and boost did not start to come on till 3500. My twins would kill it on start up, and only later did he catch up. That's not what I am intersted in.

 

Ha! Temps wont be a issue, unless your tuning is way off a lot will have to do with everything as whole to dictate where and when a turbo comes on, we've seen 67mm turbo's come on quicker than 61mm turbos on other cars. If you're looking for a single that comes on as early as the twins and makes more power it wont happen. You can't go too much smaller than your friends 35R. Smallest I would run would be 60/62. What type of power are you after?


~S~

 

I agree it has to do with the whole tune and you have to have a tuner you know and trust, and be willing to do what he and you agree needs to be done to reach your goals.

Goals for me is to get as close as possible to the feel of the twins, and since I have 333rwhp now, I would feel ok with just under 400 or around there.

Perhaps not everything that needed to be done was done on my friends GT-35, as he ended up with a number of engine rebuilds. But based on that experience, I would not go with that turbo.

These EFR's seem to have some new tech, and perhaps may be better, but I need to do more research. Again, I was led to believe high temps were and issue, and they may not be.

What is the usual exhaust temp of our cars when being pushed, say autocross, track, mountain road?

My engine is being rebuilt, small port, all accessories, etc. Still in early stages of getting set up, nothing set in stone.

 

@thewird:
wastegate flow as well as the compressor-turbine match are a bit of a concern with their current offerings imo. But they have a very nice tool to find out for your specific application, just go to their "match bot":

http://www.turbodriven.com/performan...bot/index.html

very nice calculator, it will also calculate the corrected wastegate flow and size, it also allows to "try" different hot sides and see how they match to the compressor. Unfortunatly I had to come to the conclusion, that for the compressor sides, the hot sides are too small for my taste, like mentioned initially.