Hey All.
Barrys turbos are being altered a bit . I am using different compressor wheels that will increase tip speed (spool) tremendously. Also I am doing a internal conversion that has a bit less drag than stock. We will definately see some results soon.

Take care.
Bryan
www.bnrsupercars.com

 

bryan whatever internal conversion you're doing, you'd get even faster spool by doing it on a sequential setup. what are you gonna do to the compressor wheels which will help spool greatly but not hinder top end hp? if you make em any smaller you'd have to spin the turbos at way too many rpm's (200k+) to get significant boost. the small compressors just wont be able to grab enough air.

 

Have you adjusted you wastegate duty cycles??? You have a much larger wg so if it opens the same as it used to its going to leak a ton more exhaust.

Also, yea if your running non seq with any turbos your not going to make much power before 4K or so. Thats just the way it is.

I'm a fan of seq....BUT I'm fixing to be non seq with BNR's new hybrid twins.....the secret sauce ones lol

I'll let you guys know how it goes, I think he's also going to work something out with people that have bought his stage 2's and felt they have too much lag.

I think the combination of going to seq to non seq is a shock for most people then throw upgraded turbos in on top of that and its really a shock.

STEPHEN

 

He's using a much larger compressor wheel than stock which normally would cause a lot of lag but he's changing all the internals so it should counter that. I'm fixing to put a set on my car and we'll see how they do.

I'm hoping they spool at least as fast as stockers do.....they MIGHT turn out to spool faster, evern with the large compressor wheels. I dont want to get my hopes to high though lol


STEPHEN

 

Since my rebuilt lasted 25k miles, I would sacrifce horsepower (comparing to M2) over reliability. Don't get me wrong, i'm not puting down M2 but BNR does offer a warranty and at 40% less cost with the trade off being HP. But without the dyno charts we don't know the actual HP comparisons yet.

 

when kwik put them on the car they were incredibly laggy.

i hope your right...let us know how it works out.

j

 

They were really laggy because he was running non seq right? Or are they laggy in sequential as well.

 

Ok, I'm probably gonna sound like a newbie, but...

When boosting, do the BB twins sound any different than the stockers? Like, are they quieter, do they whine more, do they whistle, etc?

 

I would think they would wine more because they spool so much faster than the stockers. But i could be wrong

 

Artguy said his makes a zinging sound rather than a whooshing sound when spooling..don't quote me on that..I had the BNRs running non-seq but had either a cracked center housing or cracked wastegate and leaked much of my boost past the wastegate..this is what made them feel laggy. I'm setting them up sequentially so we can compare both the M2 and BNR dyno charts to see power at different rpms. I'll be doing runs at like 10, 12, and 15 psi. Artguy, how much till you get to a dyno ..I know, I know, same here...should be soon though. We have just about the same exact mod list so they should be very comparable.

 

bryan specifically said he's doing compressor modifications to decrease spool, hence he's going smaller. if you read his post he says his compressor will reduce spool. this is on top of his internal modifications, whatever that may be. and what exactly is involved in this internal modification that would make it spool so quickly, and why can't this modification be done on a sequential setup to make spool even faster?

 

I am going to a different compressor wheel design. The Wheel is as efficient as the old wheel, but the design is for volume and velocity at the same time. The internal design I have been working on greatly decreases frictional surfaces on the rotating assembly, therefore allowing you to run more boost reliably. And yes the new set up will be able to run sequential. The old sets you can run sequential also.

Bryan
www.bnrsupercars.com