Hi!
Im in the process of rebuilding my FD after a long time out of the game due to purchasing a house that needed more restoring than planned, tragic deaths among family and friends and a relationship that went to pieces...
Well now, the bi...h is outta the house, I`m up on my feet again and I own the house now, so the FD will get the full treatment.
I have most of the right mods laying on the shelf here.
We are talking
BNRs
open exhaust from turboes
Good airflow from front, to filters, through big IC, to engine
the standard KG 850/1600 setup with FPR, good pump etc
Good aftermarket coils, jacobs ign, magnecor wires, colder plugs, aftermarket dynamo with higher poweroutput
aftermarket BIG radiator
Apexi PFC
FJO Water injection
Innovate LM-1 wideband
Dual aftermarket oilcoolers
drivetrain-braces, polybushes...
Removed airpump and intercooler-crap, Norway isnt THAT hot in the summer
CF hood from scoot, allowing good airflow.

Will be tuning on eurospec 98 octane fuel, dunno what that equals to US gas though. We have a very good PFC tuner just over the boarder in sweeden, i will be using him. What numbers have been made on the BNRs seq-mode now? I saw godfella was puching 421rwhp in a thread, but that was non-seq i think, and on 17,5 psi. BNRs are said to be able to push about 20?
Was giving the search-function a good workout, but could`nt seem to find any new posts or numbers on the BNRs maxed out... What numbers have been made over there now on the BNR seqs? Do you recommend any other changes, or have i covered most of what i need, partswise? I may have overlooked a few things i have laying around though, as i just recently started working on the car again after 2 years away...

I have to keep the car "as stock looking" as possible(due to car being US and thereby have to be registered on 1.15 rule saying it has to be bone stock). Therefore, the twin setup, i will have to keep some engine covers to cover up the most screaming parts, coating the pipes black etc... I also love the twin seq stup and the way it delivers power all the time, so i want to keep it seq.

Thanks for any answers, and im sorry if my questions have been asked before.

ps. i know the car was... "scared of the ground" in this pic, but i had to temporarily raise the car a tad due to the rim/tyrepackage being just 2-3 milimetres too wide( F245 and R275/40-18s if i remember correctly). Its been fixed now.



Cheers from Norway

 

I have aboute the same setup as you , without the FJO water injection. I am planning on tuning it in 15psi. planning on tuning it at EF motors in june.

same nick on mazda-ogn btw.

 

The highest I've ever heard of on BNR sequentials was around 410whp. I don't know what boost the guy was running but low 400's seems to be the standard.

 

The biggest difference you'll find when it comes to BNR's isn't whether they are sequential or not, but whether your engine is ported or not.

Back in the day Rich (Goodfella) made 421whp at 17.5psi with a streetported motor. Iirc he was *not* running any kind of AI at the time. Before I got my rebuild and single conversion I was able to push 370whp at 18psi out of my BNR Stage 3's, that was with stock ports and an Aquamist 1s system (dinosaur!) running 50/50 water/meth.

If you're running stock ports than you'll easily sit in the mid/high 300's if you push it hard, if you've got port work done than you should be able to break the 400whp mark.

Also, keep in mind that the dyno's in Europe tend to read a little different from the ones in America do. So DON'T be discouraged if your numbers seem a little low!!! All that matters is the quality of the tune and driveability of your car. Dyno numbers are just that, numbers.

 

The 850 primary injectors really aren't necessary for what you are doing. They just create idle hassles.

 

Nice to here ya still alive, was wondering why you sudenly just dissapered.
And I know what ya mean about the B***h, been there done that.

Anyway, get your *** back to the forums, you been missed.

 

Thanks for responses so far
Ill be going for a big streetport/raceport-style with all the necessary internal upgrades, so if i see 400s, ill be a happy rotaryhead

 

nevermind

 

^ I agree. Even when I had (and loved) my BNR's I knew that I'd go single once I got a rebuild and had port work done. Twins just can't take full advantage of the porting because of the manifold =\

 

Yea, but I guess he has to keep it stock looking for inspections.

 

Hmm... yeah, I had overlooked that as well =(

 

Exactly, this is the sad panda in the story

What exactly is the restrictions in the stock manifold? Any way of porting it slightly, or will i have to replace the butterflyvalves and all to have any effect from it?
I know it is a cast iron heat retainer bolted to an aluminium housing, wich is not good, but i read that watercooling should take down the EGT quite alot, taking the worst edge off the heat, together with a freeflow exhaust.

 

Take the manifold off the vehicle and look at it. It's designed to direct exhaust flow to specifice sections of the turbo. For the power levels Mazda designed it for, it does a great job however, it does also create a lot of flow turbulance in higher HP applications. I have some ideas on getting stock like spool with non seq. That's my next experiment once my 20b project is done.

 

great looking car, as others have said the most I've seen on BNRs is a little above 400. Most here go single when looking for that kind of power due to price and simplicity, but that's not option for you.

 

i am at 18 psi and making about 370. i wanted to go more but did not have enough fuel... also this was on a very small street port. i was hoping to go to at least 20psi..