SlingShotRX7

I got my $$$$ on the SINGLE TURBO.

matty

yep.
guys these are great for the money but come on lets be real here...

Rich and spo ---u guys offer alot to the forum and i for one think thats great. But come on here. You guys get alittle too excited. Do either of u have any relatiponship to BnR? i am being serious....just seems u guys tout these as if u have a stake. You guys are makign soem wil;d claims now. Having said that, i liek the bnrs....the first dyno sheet didnt do a thing for me...but u cant argue that 422 rwhp at 17psi isnt nice.

FEARED7

Hey all.

I designed the new stage 3's for reliability, and they are also engineered for people with emmissions/inspections. The CHRA's are brand new and that is something never offed from any other turbo companies specializing in HT12 RX7 turbos other than M2 in Austriallia, which doesn't do turbos any longer to my knoledge. This is a reminder that people CAN run these sequential!

I am not saying everyone has to buy twins. I know that there are applications for Single turbo conversions. No one doubts the performace of a single turbo. But what would you think if you were riding around town in your single turbo FD and you race a TT car and the TT wins? Would that make you feel bad?

If the new Stage 3's made the same HP as the last Stage 3's I would have been happy. Looking at the dyno sheets of both Heath and David's, it looks like there is room for a little more boost than before. If that is the case, there is a possibility for a bit more mid range and top end power than 422/340. If we get that TQ to come up to around 360ish we will be set to make some good power!

My daily driver (94 FD), will be converted back to twins here in the next few months . I am happy everyone likes what they see. More power will come in the future! My Goal is make 425 RWHP with the sequential system!


Bryan@BNR
205 640 1193

SPOautos

No one said they were better than every single turbo as a given boost. I said they hold thier own against many many single turbos at 17psi and less....and it seems to be true. I cant find hardly any medium sized single turbo charts that have an AVERAGE hp that is substantially higher than Davids car.

I havent seen any of those turbos you mentioned make substantially more average hp thru the rpm range than Davids car did. The T70 will beat it, it'll make around 460 @ 17psi but it'll be peaky as hell so the average is much lower than the peak. When I said T72 I probably should have said T70 but its so rare to see anyone running it that I didnt think about it.

Hell, I pulled up on the other thread a comparison of every 17psi dyno sheet on Wargasms site and the only two that were higher was Steves T66 peak number, the avg is about like Davids car. And a T78 running water injection. Even both of those cars thier peak was only 10rwhp higher than Davids peak.

Show me some dyno numbers of medium sized turbos making more than 422 average at 17psi. There really dont seem to be many, I've looked. If you have some please post them cause I'd like to check them out.

Also dont forget these two cars are running a very conservative generic timing map good for anyone cause they dont have an egt for Steve to use. They were also tuned rich on race gas for caution. In addition Davids car still has all the seq junk in it....as a matter of fact he is now running it seq and says its working awesome!!! Cant wait to see the bottem end and midrange on that!!!

Stephen

SPOautos

What wild claims man??? The only thing I'm doing is comparisons. I havent claimed that they will do anything more than what they did. And no, for the record I have no stake or financial position of any kind in BNR nor is he paying me anything. I just really like his products.

Like I said though....what wild claims are you refering too??? I just dont like to see people suggesting that everyone should go single instead because honestly I dont see anything much that suggests that unlesss your planning lots of boost and large singles. All I've done is compare them to other dyno charts on Wargasms site

Stephen

SPOautos

No hang up at all. Just most people at this level dont care about running seq cause there is more power in running non seq and seq is a pita even on a stock car. David (originator of this thread) just changed his back to seq and said they are running great.

artguy

hey bryan...any word on whether those parts for my turbo kit are coming in this week?

congrats on the numbers...cant say more than that. I tried for two years to pull those numbers on twins. well done. also..gcg is the company that makes the turbos for m2. they are still around. none of their kits is pulling down numbers like those above.


j

Boostn7

Of course....conservative generic timing and very rich on race gas....just as I expected.
Now duplicate the numbers on pump gas since it should be a breeze!!!!

Seq system was simply not designed for those boost levels.....if it works enjoy the turbos while they last....
Remember....exhaust is being wastegated from one turbo only...tons of stress on manifold and turbine housings...never mind the motor trying to push all that exhaust out.

few guys just get too excited and try too hard to promote the BNRs.
If the BNR stage3 don't burn themselves up they will promote themselves.

The only thing that matters is that David is satisfied and happy with the BNR twins and the hp numbers.....

JD

Boostn7

Keep in mind....the BNRs are bigger wheels crammed in the stock exhaust housings, therefore you added flow and lag just like going to a single.
Now, I could start with 62-1 turbos making min 420rwh @ 17psi and the boost curve will match the BNRs or beat it depending on A/R. From there on bigger compressors will make more power but that hp curve will be affected by different A/Rs.
There's alot of variables between dyno runs from different cars......many have legit hp numbers but "bull" boost numbers or they forget to mentioned how the boost creeped or they guide themselves with the PowerFC which reads less then actual.

Of course....conservative generic timing and very rich on race gas....just as I expected.
Now duplicate the numbers on pump gas since it should be a breeze!!!!

Seq system was simply not designed for those boost levels.....if it works enjoy the turbos while they last....
Remember....exhaust is being wastegated from one turbo only...tons of stress on manifold and turbine housings...never mind the motor trying to push all that exhaust out.

few guys just get too excited and try too hard to promote the BNRs.
If the BNR stage3 don't burn themselves up they will promote themselves.

The only thing that matters is that David is satisfied and happy with the BNR twins and the hp numbers.....

JD

Boostn7

Steph:
You're the one who started this "why go single turbo" crap... go back and read all your posts. You went to the trouble of graphing dyno curves....
Here's one for you to average the hp....and tell me who averages higher from 3.5krpm to 7krpm
http://dyno.zeroglabs.com/graph.php...=1&SUBMIT=GRAPH

matty

singles have way more potential. the bnrs are an inexpensive alternative. Thats it.

however i will prolly buy the bnrs given my goals.

also--noone is suggesting that everyone should go single..where are u8 getting that from?

SomeGuy_sg

WOo....guys lets chill with the hate . It is like you say tomatoes , i say tamatoes . I think that we should all remember that different people have ..well.. different needs and wants for their car . Be it going single turbo and having peaky power or stay with the twins/upgraded twins for that more torquey power . It all boils to wants and needs .

A single turbo might blow away a twin on the strip but the twin might spank the single coming out from a corner exit

We should concentrate more on what we agree on ... the 7 is the sweetest mistress to have

SPOautos

No I didnt, I posted that in reply to people saying that going single would make more power.

pluto

You know that I'm not starting anything here john, but don't you think that for acceleration purposes, you should be looking at from 6.5krpm - 8krpm? if we're talking about city driving, I think 3k-5k should be looked at. I don't recall when I shift from one gear to the next will drop the rpm to 3krpm when I'm accelerating at the drag strip (unless I missed 3rd and went into 5th)?

Also, like you said about the boost #'s and torque going up seems like we were running more boost than we claimed. I'm sure that you have seen plenty of torque #'s to know that 350rwtq or less is usually around 17psi of boost. No matter if it was twins or single. Maybe we were only running 15psi of boost and creeps to 17psi of boost? however, I know from datalog that the boost stays pretty constant and never drops down even to redline.

SPOautos

Damn, took to long to edit and it wouldnt let me. You are partially right, I think I got confused about which thread was which and posted that in the wrong thread.

Either way, all I did was post a comparison between all of the 17psi charts on Wargasms site. It is what it is, I havent said it was anything more than what the comparison shows. I wasnt saying not to go single, I was saying that based on the comparisons I've seen unless you are going to go big single (like T70 or larger) or your going to run a lot of boost on race gas then going single isnt that benificial. Especially considering the conservative tuning.

I was going to mention that about Davids car and boost creep but Steve already said it. I'll just leave it alone.

Boostn7

[QUOTE=pluto]You know that I'm not starting anything here john, but don't you think that for acceleration purposes, you should be looking at from 6.5krpm - 8krpm? if we're talking about city driving, I think 3k-5k should be looked at. I don't recall when I shift from one gear to the next will drop the rpm to 3krpm when I'm accelerating at the drag strip (unless I missed 3rd and went into 5th)?

Hehe.....Steve I agree....
I'm just messing with Steph....
Obviously I rather have more power between shift points too:-)

Jodeny

iTrader: (3)

Rich,
I'll take up your offer also, but I'll run my stock twins so you'd better whoop my ***. Any time you are in the Long Island area let me know and I'll PM you my cell number and we'll "get together."

John