Hey guys, this question is a little obvious but i wanted the answers to confirm before i go ahead and purchase anything further? I have just finished my turbo set-up on my B6 1.6 MX-3, the set-up is all custom with the exception of the 323gtx manifold and turbo which are in there now. I bought some injectors that were obviously too big for my set-up ( 460 cc) so now the car runs horribly as the fuel injectors are dumping way too much fuel. My question is , will the SAFC from Apex-i control this properly or am i waisting my time and if so what should i do besides the obvious which would be to pull out the 460cc and put in something smaller? Any advice is welcome as this is my show car so I am not looking for as much power as i am SHOW and a little go. The importance is that it runs good when i am driving to shows and what not.
My set-up so far:
323GTX manifold
323GTX turbo stock ( rebuilt ) Small turbo
aeromotive Fuel regulator
custom turbo intercooler piping
spearco front Mount intercooler.
walboro high flow fuel pump
2-3/4 stainless exhaust from front to back
460cc injectors
greddy turbo controller
greddy turbo timer
stailess braided fuel line hoses
stock computer ( not sure if i can use anything else?)
stock B6 mass airflow sensor
460's are too big to use with the afc. You cannot delete out enough fuel to make the car run right. I would probably use 320's or so with the afc.
Jarid Perry
94 mx3 Turrrbooooo (not even close to stock) 302WHP
71 Chevy C20 (tow rig!!)
77 Jeep CJ5 (no way its stock)
06 MINI Cooper S JCW GP (few goodies) 210WHP
2008 MINI Cooper Clubman S
460's can be made to work with the S-AFC...but...they are not fuel efficient and you'll have to idle the car up around 1300rpm's. I used to run 440's back in the day that way.
As previously mentioned, a good match would be the 320-330ish cc range. I have a set of GTX high impedance injectors (330ish cc's) if your interested.
http://www.cardomain.com/ride/354836
B6T, APEXi Silvia IC, HKS SSQV, Magnacore KV85 Wires, NGK V-Power, Haltech E6K, Accel 300+ Digital Ign w/ coil, Accel 375+ controller, JWMmotorsports turbo manifold & exhaust, custom Garret GT-R series turbo, MAZDASPEED mounts, SRD Bushings, Pacesetter Short Shift, entire Pro LX drive train w/ custom ACT clutch (I'm the first to succeed this on B6T), Weapon-R, and lots more stuff!
funny how people say you cant tune big injectors with an safc, but yet my car idled at 900rpms at 14.5 a/f's with 460's. I've moved on to a greddy e-manage with 550's now, but its all in the tuning, you just gotta tweak here and there. If you plan on making big power, might aswell leave them in there and get it tuned right. Better rich and safe, then lean and sorry with a hole in your block. Lates
Jteezy wrote:funny how people say you cant tune big injectors with an safc, but yet my car idled at 900rpms at 14.5 a/f's with 460's. I've moved on to a greddy e-manage with 550's now, but its all in the tuning, you just gotta tweak here and there. If you plan on making big power, might aswell leave them in there and get it tuned right. Better rich and safe, then lean and sorry with a hole in your block. Lates
I'll tell u one the Guys making Big Big power 500whp and over sure as hell aren't runing with a greddy e-manange. u run to rich for 2 long u'll eventlly crap out ur engine. greddy e-manange is still a piggy back a decent one if u can get it to run right thery were really made for honda's and mitsu's.
(12.4@118@18psi) 92 MX-3, KIA (BP-DE)Swap, Electromotive TEC II Standalone, 8,200 Rev Limit, Custom Intake/Exhaust Manifold, 1,000cc PTE Injectors, Custom Fuel Rail, Aeromotive FPR, 80MM Holley TB, MSD 8.5MM Wires, NGK V-Power #8, SC6262 Turbo, 3 in. DownPipe, Tial WG/BOV, 600HP PTE FMIC, 2.5IN Intercooler Piping, EQUUS/Autometer KIA G-Series Tran, Extreme ACT Clutch, Built BP in starting process.
well of course you dont want to run too rich and wash the cylinder walls. What im saying is things are controllable if you really try. And also incase you didnt know there are many cars using the e-manage making over 500whp. I should be over 350whp next time i go to the dyno and my e-manage works awesome with the map sensor. Anyways, good luck tuning with the 460's. Later
Thanks guys, I think i will step them down a bit if i cant get them to work well with the SAFC , only cause like i said i dont really care about big power cause its a extreme show car but i just want the car to run well and if i get on it the odd time i dont want to damage anything.
I bet you used an adjustable fuel pressure regulator with the S-AFC didn't you
Other things that help are boost timing retard ignition devices...then you can run 30* of advance at idle requiring more fuel and giving peepier throttle response on or off boost. A hotter ignition period helps a LOT. Multi-spark systems like the Accel & MSD make it extremely hard to wash the cylinders as they burn off nearly all the excessive fuel even when using really large injectors preventing the cylinders from loading up. Other methods are using low impedance injectors with a resistor box. Low impedance injectors respond much quicker and enable you to run much shorter pulse widths which is handy in application like my car for instance; 1000cc injectors, NO idle air control, less than 25psi of fuel pressure at idle and I can lean the idle out so far it will lope (not a good thing....lope is from running so lean it miss fires). The car idles around 14.6 -15.6 AFR depending on humidity, air temp, cold start or hot start. Of coarse mine has a standalone, is daily driven, and makes around 500HP on pump gas
The E-Mange is very capible and people would be surprised as to how capible. With the Ultimate E-Mange and a MAP sensor add on it basic only uses the OEM Engine Management for a killer base line map for your ignition and fuel maps. The are tons of combinations that can be used to literally rival standalones untill trying to run monster injectors. One would be to use the OEM system with a S-AFC, a resistor box w/ low impedance injectors, & the MSD add on boost timing master used with the OEM ignition. Another combo is a stand alone fuel computer with the MSD 6BTM or Accel 300+ coupled to an Accel 375+ controller. Most of those combos will run around $800...hmmmm....you could get a Microtech LT-8 for that...it even comes with a base map that allows you to start and drive the car. Sometimes you can find used Haltechs or others for less than that.
Fuel Injection is kinda like buying ice cream....There are MILLIONS of flavors to choose from!
http://www.cardomain.com/ride/354836
B6T, APEXi Silvia IC, HKS SSQV, Magnacore KV85 Wires, NGK V-Power, Haltech E6K, Accel 300+ Digital Ign w/ coil, Accel 375+ controller, JWMmotorsports turbo manifold & exhaust, custom Garret GT-R series turbo, MAZDASPEED mounts, SRD Bushings, Pacesetter Short Shift, entire Pro LX drive train w/ custom ACT clutch (I'm the first to succeed this on B6T), Weapon-R, and lots more stuff!
Well I want to upgrade the turbo to something bigger ( not for power as much for cosmetics SHOW!) So if i use the SAFC will the car run properly at idle and run hard when its pushed is my major question? If not then you suggest smaller injectors with SAFC or stand alone fuel management? I have MSD ignition but havnt put it back in yet as i was debating wether i was going to change it or not? I have been reading all the replys and i certainly appreciate all the info.
