SAFC, Rtek7, and stage 2 turbo
EIT
Joined: Jan 2002
Posts: 1,790
Likes: 0
From: Austin, TX
Track Junkie
Joined: Oct 2002
Posts: 1,277
Likes: 0
From: Los Angeles
wow i wonder how he's pulling all this off, the S4 ecu is total crap, and there was/still is only one option really, and thats to run standalone if you want to get anywhere with an S4. S5 ecu on the other hand is far superior to the S4 ecu and you can do all kinds of stuff to it, i think he will definitely create some wonderful things with the S5 as he is with the S4 already.
thats makes the RRFPR way of doing things even better if and when he does release a chip to allow it to run 720's.
thats makes the RRFPR way of doing things even better if and when he does release a chip to allow it to run 720's.
i wouldn't say the s4 ecu is CRAP, because it definitely gets the job done. however, the S5 ecu seems to be much better and i am really looking forward to his chip upgrade to see what all he can do with the S5 since its more advanced.
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Originally posted by deltr0n`
thats makes the RRFPR way of doing things even better if and when he does release a chip to allow it to run 720's.
thats makes the RRFPR way of doing things even better if and when he does release a chip to allow it to run 720's.
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Originally posted by deltr0n`
dude thats what air fuel meters and a fuel gauge is for, its a mechanical way of doing the same exact ****, ok?
dude thats what air fuel meters and a fuel gauge is for, its a mechanical way of doing the same exact ****, ok?
It makes no sense at all for you to claim something as crude as a RRFPR forcing more fuel though stock injectors is better than a fuel controller and bigger injectors, and then turn around and say you should chuck out the "crap" stock ECU and replace it with a far more sophisticated standalone.
and last time i checked electronics FAIL, mechanical doesnt.
Rotary Enthusiast
Joined: Aug 2002
Posts: 850
Likes: 0
From: MO
if the s4 is crap because it isnt tuneable then the s5 is just as much crap. i think you could do just about anything to the s4 ecu as far as ecus go. thats what henrick is doing, just adding on/teaking the code. i dont think youll be able to do anything more with the s5 ecu that you cant do with the s4, cause if your as smart as henrik you can do just about anything you want with either ecu.
It's a Hammer
Joined: Jul 2002
Posts: 998
Likes: 0
From: Richland WA
Sometimes the truth is not what you want to hear
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
It's a Hammer
Joined: Jul 2002
Posts: 998
Likes: 0
From: Richland WA
Sometimes the truth is not what you want to hear
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
Thread Starter
Rotary Enthusiast
Joined: Sep 2002
Posts: 1,351
Likes: 0
From: Daytona beach
Originally posted by dr.jones63
Sometimes the truth is not what you want to hear
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
Sometimes the truth is not what you want to hear
http://mazda.a-spec.ca/
"engine control computer speed was doubled and operation upgraded for faster response to throttle inputs."
Blow a 89-90 model and tell me how faster ecu responses will locate you a spare 89-90 rotor housing.
Originally posted by gsracer
It's a lot easier to tune the safc if you're using equal sized primary and secondary injectors.
It's a lot easier to tune the safc if you're using equal sized primary and secondary injectors.
eric.
Ahhhhhhhh hhh....
Joined: May 2003
Posts: 837
Likes: 0
From: www.wRongPeople.com
Originally posted by kd86rx7
its easier for the safc, but wat about the hks f-con with gcc? better to go equal sized primary and secondaries or smaller primaries with bigger secondaries?
well the fcon is for stock injectors... i had one. had to sell it.
eric.
its easier for the safc, but wat about the hks f-con with gcc? better to go equal sized primary and secondaries or smaller primaries with bigger secondaries?
well the fcon is for stock injectors... i had one. had to sell it.
eric.
SCCA Rookie
Joined: May 2001
Posts: 1,936
Likes: 0
From: Sterling Heights, MI
Originally posted by deltr0n`
Pressure calculation: the fuel pressure required increases with the square of the boost pressure ratio:
Example: 6 psi boost is a pressure ratio of 1.41. With stock fuel pressure of 36 at zero boost, than:
Needed fuel pressure = ( PR2 x 36) + boost = (1.412 x 36) + 6 = 77.5 psi
http://www.bellengineering.net/Pages...struction.html
Pressure calculation: the fuel pressure required increases with the square of the boost pressure ratio:
Example: 6 psi boost is a pressure ratio of 1.41. With stock fuel pressure of 36 at zero boost, than:
Needed fuel pressure = ( PR2 x 36) + boost = (1.412 x 36) + 6 = 77.5 psi
http://www.bellengineering.net/Pages...struction.html
He's got the fuel taken care of already. All he needs to do if the car is properly tuned is to run the car at the desired fuel pressure, which will go up ONE psi per ONE pound of boost, to compensate for the additional pressure in the intake manifold, and inject the same (well close to the same) amount of fuel for a specific injector duration.
Has anyone actually used one of those Bell RRFPRs? All I hear is bad juju with them. I bought one for my 99 GSXR750 that I made a turbo kit for and it wasn't on there a week before I had to take it apart and fix it. Worked great for 2 days and broke again.. Fuel pressure wouldn't stay still. It was actually loading my pump down.
I finally chucked it (and it was brand new) and bought the more expensive Vortech SFMU. Havent had a single problem since. The bike is running great. Guess you get what you pay for.
Regards,
Mike Montalvo
digital tuning, inc
www.pocketlogger.com
I finally chucked it (and it was brand new) and bought the more expensive Vortech SFMU. Havent had a single problem since. The bike is running great. Guess you get what you pay for.
Regards,
Mike Montalvo
digital tuning, inc
www.pocketlogger.com
