A Guide to Borg Warner and Bullseye Turbos

[crashtke]

They are kind of new to the import scene, so I thought I would write a little guide to them. For those that are unfamiliar, they are taking the import world by storm. The technology on the turbochargers is pretty revolutionary and has companies like Garret finally redesigning their turbos just to try to keep up.

Borg Warner has been around forever and makes tons of OEM turbos. What is new is their extended tip technology that allows the turbos to build boost faster and make more power than previous turbos. These turbos are efficient to VERY high pressure ratios which is exactly what we need for smaller displacement sport compact engines in order to make good power.

Bullseye Power is a company that took these turbos a step further and started making "hybrid" turbos that were even more suitable to smaller displacement motors by offering smaller turbine wheels and housings by combining various Borg Warner/Airwerks (Airwerks is Borg Warner's performance division) components into new combinations. Bullseye also makes some of their own turbine housings and some of their own billet compressor wheels.

So some of the turbos and what they equate to in Garret language, lol.

-S200SX or S256 turbo: Equivalent to a GT3071-3076R turbo, these are smaller extended tip turbos good for around 500-550 max. The S200SX comes with a T-3 divided flange on the turbine. Bullseye went a step further and added the .70 AR single scroll and the .55 AR stainless steel housing as well as the DSM housing

-S259: only available from Bullseye, this is a slightly larger version of the S200SX that has an upgraded 59mm compressor wheel. Good for around 600 under ideal conditions, this is a pretty fast spooling turbo that is just a hair smaller than a GT35R. Bullseye also makes a Billet wheel upgrade for this turbo.

-S362: This turbo is very close in size to a GT35R. Good for 550-700 hp depending on turbine options, it spools up VERY quickly for such a large turbo and makes good power. Stepping up the the S300 series of Borg Warner turbos, the compressor housing is quite a bit larger. This turbo also is made by Bullseye only. On a 2.5 liter motor I was able to get 25psi by 4400 rpms. Available in T3 and T4 turbine housings.

-S364: Also a Bullseye only turbo, this turbo is a step larger than the S362 and has a 64mm extended tip compressor wheel. This turbo has a max power rating of 750hp. Spool is slightly slower than the S362, but better power and less lag than the S366. This turbo is larger than a GT35R. I would equate this to a 37R.

-S366/300SX: Available from Borgwarner, this turbo has a large 66mm compressor wheel and a t4 housing with a 79mm turbine wheel. Bullseye has a couple different variations of this turbo with smaller turbine wheels to aid in quicker spool up for smaller displacement motors. This is the turbo I am putting on my personal car, a 2.5 liter built motor WRX. This turbo is capable of 750-800 hp if completely maxed out and is equivalent to the Garret GT4088R.

Bullseye and Borg Warner also makes larger turbos all the way up to 1800 hp, but I figured this list would give a good starting point for most people on this forum

[Lusos]

Awesome write-up man. Respect.

[patrick4588]

great turbos

[crashtke]

Thanks guys. I thought it might do people well to see some of the other turbos out there other than Garretts and ebay We have actually focused all our turbo kits around these...should tell you are opinion of them! Andy and I should hopefully have 3 more coming out here soon on Subarus as well as one on a S2000 and one on a 03 Cobra.

[CaTcH22]

Good write up. We have actually been selling and using bullseye turbos for a while now.

[crashtke]

Same with us. I just thought with the growing interest, it might be nice to get a write up for people so we don't get the same questions over and over, lol.

[Jdm94Coupe]

what bullseye turbo would be good on a d16, one that spools up quicker then the ones on your list....... for us 1.5/1.6/1.7 liter ppl

[JJSPEC Racing]

I just used my Bullesye Power unit that I have had since 2007 to run 10.4 on wastegate(20ish lbs)

[crashtke]

what bullseye turbo would be good on a d16, one that spools up quicker then the ones on your list....... for us 1.5/1.6/1.7 liter ppl

what hp are you shooting for?

[Jdm94Coupe]

what hp are you shooting for?

300whp with quick spool

[crashtke]

I mean they make one that is a S247 that maxes at 350, but if you ever want more....well, now you have to swap out the turbo. Me personally, if I were in your shoes I would get more turbo than you think you will want as it only has to spool up in 1st gear. From there, boost is just a downshift away. I would go with the S256 with the .55 AR stainless housing. It would be capable of 550 max if you ever wanted to crank it up and with the stainless .55 AR housing, spool would be very quick. The stainless steel housing can drop spool time as much as 500 rpms due to the retained heat helping spool up the turbo faster.

[SPOOLIN]

I love my bullseye s372 (Same EXACT thing as the Airwerks S400sx3) but that company is going downhill and any of my future turbos and turbo repairs will come from Airwerks Directly. Bullseye's Development staff are fucking idiots and their billet wheels are nothing but direct copies of their cast wheels which is a total disregard for the benefits that a billet wheel CAN offer.

[trini_gsr]

thanks for the write-up! i'm gonna replace my old t3/t4 on the db8 this summer and have been hearing a lot of good things about these turbos. this was a good comparison for those familiar with the garrett sizing. i'm like the other guy in here that wants around 300whp so i'll probably take your advice and get the s256.

[crashtke]

I love my bullseye s372 (Same EXACT thing as the Airwerks S400sx3) but that company is going downhill and any of my future turbos and turbo repairs will come from Airwerks Directly. Bullseye's Development staff are fucking idiots and their billet wheels are nothing but direct copies of their cast wheels which is a total disregard for the benefits that a billet wheel CAN offer.

But, they offer some turbine options and housing options that Airwerks does not offer. Airwerks is catching on though and starting to have some pretty cool new turbos that they are offering. Have you seen the billet wheels? They are actually not direct copies. Notice the laminar air flow grooves at the base of the turbo wheel. I am willing to bet if you took yours off it does not have them...at least none of the ones I have seen had them. They are initially making the new wheels in similar sizes to existing ones and them going from there once those are done to develop new wheels and combinations from what David (one of the aforementioned development guys). Here is a couple images:

[SPOOLIN]

yeah that wheel is completly pointless. Until they build them the right way, not many people are going to jump on it. I know what they are doing wrong in the design and someone i know who used to play a leading role with their company agrees with me.

[crashtke]

yeah that wheel is completly pointless. Until they build them the right way, not many people are going to jump on it. I know what they are doing wrong in the design and someone i know who used to play a leading role with their company agrees with me.

Ah, so you are friends of a disgruntled ex-employee. Gotcha. Dan maybe? Saw your site...Turbo dave would be another person down on Bullseye for personal reasons.. I don't know them or have any issues with them, but coming on here to try to thrash a companies good name for personal issues is kind of uncool. Fact of the matter is they offer some choices that Airwerks does not at this time. Their products seem to be pretty darn good. We have quite a few of them out there working well. All personal opinions aside, they have some good options on good turbos.

BTW, I don't work for Bullseye or represent them. I just use their products and have had good results with them.

[SPOOLIN]

No, I 've never spoken to Turbo Dave on Bullseye. And yes I am in communication with dan a good bit. Fact of the matter is my opinion is based on fact. the billet wheels they are producing are pointless. when you design a billet wheel, at least make it fit in the backing plate hole properly, and design it with performance in mind. Bullseye is supposed to be a PERFORMANCE turbo line based on Borg Warner but their billet wheels don't have thinner blades & the hub of the wheel is still the same size as its cast counterpart. Precisions 67mm Billet Wheel flows as much as a BEP S372 turbo and theres a reason why and BEP is failing to stay competitive. I love my BEP turbo and its been nothing but good to me, but i have acquaintances that have had very bad experiences with BEP customer service in the past year. Solution: BUY BEP Turbos, but have Airwerks perform any future maintenance, lol. I wont even touch the current billet design until they show some flow numbers that make sense and make the hub smaller.

[crashtke]

While I agree with you on the hub design of the billet wheels, I do think they have quite a few merits to some of their other parts. They offer factory quality turbine and compressor housings, some nice race covers and some combinations that are not available through Airwerks. I have not had any negative dealings with them. I guess it depends on who you deal with up there, but David has always been very quick to help out. I have heard stories of customer service issues from a particular employee...but I don't deal with anyone other than David.

I am also looking forward to some of the data they come out with on the new wheels. David mentioned that they have some new testing equipment being installed and some cool new data acquisition equipment as well. We will see! In the mean time, I do feel they make good products and combinations. The turbo I am putting on my personal car is not one that is available from Airwerks, and I think it will work better than the Airwerks box unit.

[ueyedgr8tness]

Bullseye ftw! they have good quality for the price i think.

[Axix23]

good info man...

[-S Double C-]

While i agree BW's are nice these precision billet series has them by the balls show me a 62mm from BW equal to the PTE 6265 Billet that makes 800whp on a 2.0 gsr with still another 30-40whp to go.