Hey Matty,

We went through this same topic not too long ago:
https://www.rx7club.com/showthread.p...0&page=1&pp=15

 

i been trhu it with goodfellas and spo a few times too. i like to beat a dead horse as do they it appears.

edit..just read your post and your stance seems close to identical to mine.
What do u think of the new bnrs? especially about how a guy here just said that they break the tires lose on part throttle in 3rd gear with 275 so3s

 

I didn't take the time to read all this but as I said before, as soon as I get my car tuned I'll post my dyno sheet. I'll also do the 40 to 140 test. As far as 1/4 mile times, I've never done it so I'm sure my times would suck... Maybe one day I'll let somebody run it just to see. It's a few hours drive to the closest 1/4 mile track anyway so I don't think I'll get much preactice...
I am real pleased with my set of the new stage 3's. I'd buy 'em again in a heart beat!

 

MPH in the quarter doesn't change too much from driver to driver unless one is really really bad. It's a good indicator of power. ET can swing a lot though.

Kevin T. Wyum

 

tell that to the z06 guys that claim 120 mph traps when the maasses run 113-116mph.

 

He said driver to driver, not car to car

I'm sure there are some Z06s that trap higher than others.

I agree with Kevin, trap speed is an excellent indicator of horsepower. My highest traps on stockers were 113ish, and with the old BNRs I was in the mid 120 range, based on numerous 1/4 pulls against other cars.

I tend to agree that the old BNRs (based on being partial rebuilds) had reliability problems. These new ones are a whole different animal.

Also, I just spoke to JD last night, and it looks like tuning and dynoing on high boost will happen in the first half of January......

Rich

 

I have 265 S03s on the back and just broke loose violently enough that the car stepped into the next lane at about 5000 rpms in second gear merging on the highway. You have to remember that cold tires will not grip cold asphalt very well.

 

huh? his point is to say that A carwill trap a consistant number unless the driver really sucks and i "generally" agree. It is a good indicator of power.

JD has the new set? clearify please.

anyways u havent ran your car man..shame on you.

 

ah good point but my car
does the same with the stockers....i only have 245 t1s though. Neverless 2nd and 3rdgear at partially throttle is very different.

Whats the climate in TN right about now?

 

JD is tuning me.

Most recently, my R1 was down for about 9 months when I was working over 100 hrs a week. I am pretty happy with being able to port the motor, build the motor, install the rebuilt tranny, and then get it back together after the paint job, along with a slew of maintenance and other small upgrades---urethane motor mounts, oil pan reinforcement brace, s/s clutch line, 6 puck clutch, cryotreated ppf, synchros, clutch and flywheel, the list goes on. Moving from TX to NJ took a little bit of time as well. Oh, then there was the whole 'deploy to war' thing. My apologies if I haven't exercised the BNRs as well as I would have liked

 

Climate in TN is between the 50 and 60 this week.
And if the shame on me for not running my car comment was for me, the only track we have here is an 1/8 mile track. Plus my car has only ran for 3 months total this past year. 2 of those months was before I popped the engine. I'm looking at the end of Jan for tuning. Maybe after that I'll try my luck on the little track to get some experience, then I'll find a 1/4 mile track.

 

davids car has a lot done to it. . . the bnr turbos that are on his car are very much a creation of his as well. he has had his hand in everything. . . extensive exhaust manifold porting, redirecting, and coating. every flange. . . and i mean EVERY flange is gasket matched. theres even a place in the y-pipe that he cleaned up cause it has a step. . . the place were the rear turbo charge pipe mates to the front turbo charge pipe via the o-ring seal. his car is phenominally built. . . so a comparison is very hard to throw out there when it comes to what guys with these twins have done. . . also, david IS one of the beta testers for the new bnr's. he has the setup with the larger compressor housings.

paul

 

i have the stage 2 BNR twins. I boost them to 14 psi Non-seq. I have had them for about 10k miles. Run 12's at the track with all bolt ons. (No upgraded fuel yet ) They do smoke a little when you are under boost. I think i am actually goin t78 because i had an offer i couldnt refuse on one, but they have been good turbos so far!

 

PS i trap at 115 for those who were talking about trap speed. I would run low 12's but i cant get my car to hook. I had a 12.7@115 with a 2.4 0-60 ft!!! I mean damn, if i would just shave that to a crappy 2.0 then i would run low 12's, and if i had decent tires maybe 11's.

 

While that's nice, it's certain doable on the stockers:

Sequential and using a Pettit ECU so stock injectors as well.

 

Stock injectors are capable of supplying enough fuel for 14 - 15 psi of boost???

 

Yes, read this thread:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/what-situation-do-you-have-259912/

 

i trap 116mph on stocker turboes and stock engine. i usually cut a 2.00 60'time and run 12.2....regular street tires...toyos. Slicks or dr i would be 11s.

 

i have to disagree...it goes from car to car. i was tuned to 11.2 afr and was seeing high 90% duty cycles at like 12 -13 psi.

and i know wade's thoughts but i didnt like having high duty cycles...just my OPINION. I wasconcerned b/c of a cooler night or boost spike...ya know. Its all about having a margin of error.

 

Stock fuel pump, stock injectors, and stock turbo's, I ran a best of 11.69@119mph on drag radials. I ran consistant 11.70's all day with no problems. Only thing I did was run race gas to be on the careful side at 16lbs of boost. Never had a problem for almost 2yrs till I went single turbo.

 

this i am not to sure on but doesnt higher octane gas richen up the afr?

its touch to talk about safety and fuel systems without providing an afr. Although 2 years is a pretty long time.

This is great two of my favorite subjects in one thread..BNRs and fuel systems.

 

No, it doesn't richen up the a/f, but the higher octane will help prevent detonation. Your best bet is to buy a Nipendenso fuel pump and 1600cc secondaries, and power fc. I had the power fc and dynoed 353rwhp at 16psi on the twins. You'll be set and when you do go single turbo, you'll already have the fuel system needed.

 

yeah i onyl went 1300s (awhile ago)cause i dont think i will ever be going single. just bnrs if this new version is what people say it is.

 

I hope for your sake the BNR's are more reliable than previous versions. I've NEVER seen a set that didn't smoke. IMO, your better off buying a set of brand new '99spec's.

 

hell yeah..thats what i am doing here....trying to get some info to make my decision. so far its compeltely subjective. so far so good thouhg atleast they arent smoking. just need to see if they make power.

I would never buy the 99 specs by the way.

My stockers are in perfect working order....i am simply looking for more power.