i want to get better boost responce for the stock twins how can i go about it. will a controller help? if so which is best. or is there any other kind of aftermarket piece that would help?

 

Full exaust, ECU, Intake, FP, 12lbs. Itll wake the car up.

 

A boost controller...

Some people claim to get better spool with Royal Purple Synthetic Oil as well (havent tried this myself).

And of course there is the matter of the intake and exaust restrictions, and the fuel upgrades, and the porting and the turbine clipping....

X

 

I have a blitz dsbc, and somewhere buried in the instructions there is something mentioned about adjusting the rate of spool or something like that.

 

better response??????? what are you getting turbo lag or something?? I just don't understand, I don't really remember, but how long does it take for you to get full boost?

 

Definitely. Best way to do it is to open up the exhaust and intake, Downpipe should be step one. Probably followed by intake, then ECU, etc. etc.

 

hmm, i think some of you guys are jumpin the gun here?
smg944, if you are not gettin good response with the stock sequential setup, then somthing is wrong, the stock setup gives you boost very quick, (the entire purpose of the sequential system, eliminate extensive turbo lag using small turbos in a sequential setup, et, et)

I can give you a ton of ways to increase
response' but i need to understand if your car is working in a healhty manner first, if not, then gettin the system to work right is your first solution :-)

 

no my car is working fine i have good boost pattern 10-8-10 , kicks in quick but i want it to pick up quicker. is there anything to jump that first turbo quick? damian, give me some info on increasing. im looking to elimiate lag as best i can, i like a big torque curve.

 

y dont you do those basic mods... like change to dp, cb, intake...? or take out the double throttle butterflies... anything that will increase flow... of course you have to watch out for the 3 step mod... after that... must get an ECU!!

 

I think you need to study how a turbo works first before asking that question. If you understood how the turbos work (in detail) then you'll be able to answer that question yourself.
But here is the short version:
Turbos work off the exhaust flow (energy), by increasing that flow (hence the intake, dp, etc)you will get slightly faster response time (but will also have to deal with spikes). When the airflow is copletely open, you have reached the physical limitition (peak) of the exhaust energy, the turbos will not respond any faster due to friction aerodynamics, etc.
Physically there are two ways to increase the turbo response time. One, use a smaller turbo, this reduces rotaional mass, less exhaust drag.......so on and so on. Two, use ball bearing turbos (reducig friction).
The stock turbos are quite small to begin with and the intent, as damian had pointed out, is to have quick response time and wider power band (not higher, wider). It takes the stock turbos less then 2 seconds to hit full boost when working properly, how much faster do you expect them to be?

 

i know how turbos work, and i know intake and dp help but i want no turbo lag. zero. none. i want to get rid of it as best i can. i had an rx7 before that had almost no lag, picked up at 1800rpm but again i want less lag. the stock twins pick up fast but im looking to make them pick up the fastest so i want to know other mods i can do.

 

If you know the way turbos work then you must know it is impossible to eliminate lag altogether. There is just not the exahust flow at real low RPM to spool up the turbos much much before 2k. From the sounds of it you should start looking into supercharger setups so that you get what you want.

Grant

 

I think you are partially confusing turbo-lag with the power characteristics of a rotary engine. It is not really possible to generate more power below 2500 rpm than with the stock set-up. As the others have pointed out, there is not enough exhaust energy to significantly spool any turbo at that low of an rpm. That factor combined with the poor low-end torque of small engines leads to the lack of power below 2500 rpm that these cars have.

To me, it sounds like you expect V-8 torque characteristics from a twin-turbo 1.3L rotary engine and it's not possible.

 

Get a high powered fan that pre-spools your turbos before the exhaust energy is created.

Another way -> Rev, and drop the clutch.

Another way -> Get your little sister to push the car until you hit 1800rpm.

 

1800 rpm?? Was that a turbo from the 24th century? I have never seen a turbo hitting full boost before 2800 rpm.
Knowing how the turbo works and wanting a 0-lag turbo is an oxymoron. Everyone has already given you all the possible options. I'll add the last one to the list, this is incase you have more than 10k to waste. Add a supercharger in conjunction to the turbos. This had been done on other cars before. There has to be a custom made clutch mechanism for the supercharger, so it can disengage when the turbos come on line.

 

Well you can use the PFC / Datalogit to run anti lag.... it just dumps extra fuel in when you hit the switch, that fuel burns in your exaust turning you turbos into turbines temporarily... but you are lighting the candle at both ends there... I don’t think stock turbos could take very much of this.. How about changing your final drive ratio and driving at a higher RPM... Your 7 will launch like a rocket, just so long as you dont mind shifting alot..

X

 

MISFIRING SYSTEM !!!

 

My 99-specs give me 10 psi ~ 2300-2500 rpm
Look into getting those

 

you can not make a zero lag in a turbo system.. there will always be lag... IMHO

i think i agree wiv those people that said supercharging it... i dont know who have done it to an FD and i dont know why would they do it... so, i doubt there is any who will want to go to that trouble...

 

Actually the best solution would be to convert your FD into an electric hybrid .... your ISA will provide INSTANT high torque and then you shut it off via your control algorithm around 2500 to maintain your state of charge.

It might cost a penny or so.

 

Yes lag does suck a big one. But it is just the way the world works, there can be no such thing as no lag with only stock twins. Many years of studying to be a rocket scientist has told me that u can always better physics though. so keep on reading the responces.

 

If you want quicker response you can do fine tuning with an adjustable ECU such as the PFC, however, the improvement will be minimal and will not be consistent from summer to winter. An apexi boost controller may also net you a bit since you can better custom tune your boost curve by rpm, but it will change with the seasons.

Add some mods (minimum intake and dp), fresh turbos (hi-po 99's), and a purpose tuned Apexi PFC and AVCR and you will be on your way. A bit of port matching, polishing, and selection of proper IC and tubing will also net a few rpms of response time.

If you are looking to max torque to the rears, try a 4.33 or 4.7 diff gear ratio swap. That plus a shorter 5th gear will help on the highway.

Best thing is to only drive the car in cold winter weather!

 

well i know you cant have no turbo lag but i want to elimiate it as best i can. im just asking if there are any other TURBO alternatives to better boost responce, i dont want a superchager or an electric car. at 1800 rpms was when my turbos caught psi just picked up , by 2500 i would have full boost i was running 12psi, at that time i had no dp but i had every other mod.

 

you can always use ballbearing turbos