Hey guys, I know I've heard people mention 550 / 1600 combo might be hard to tune but does anyone run this and still have smooth tuning????

Thanks,
STEPHEN

 

yes, we are using the e6k though.

mike

 

I'm running 550/1600 and on PFC and Im doing okay

 

Awsome man, I'll shoot you a PM

STEPHEN

 

I run that combo. Im running an E6K. When the engine isn't completely warmed up it has a little stumble but after the engine is up to temperature it's nice and smooth.

 

I currently run that combo with the PFC as well. No major issues with transition or tip in.

using 0.00 for the pri and 0.40 for the secondaries.

K

 

I am running this setup too. I had a pretty annoying hesitation on switchover and downright shitty stumbling/hesitation at high rpm (5000+) and part throttle (say -10 to 0 inches vac), but Dave/KDR tuned it out on the dyno. I'm very happy, the car drives great now.

Brian

 

Brian, your running the PFC arent you??? Do you know what Dave did to help get it smooth???

Thanks
STEPHEN

 

Anyone doing this with NON-SEQ Turbos with more then 15 psi ??

 

Please don't flame.. ..about the more than 15 psi part..

 

Hmm where to start?

Well we dropped the fuel pressure by a couple PSI, I run about 36 PSI at 0 manifold now.

Did some adjustment of the transition settings as follows:

0.06 on primaries
0.12 secondaries
transition time 0.996
pri/sec trans 40%

Corrected the fuel base maps that were programmed by XSEng using his dyno + wideband.

Moved some vac lines around. I had the FPR and the sensor on the same line, Dave said this can mess up the sensor. Give the sensor its own line to the throttle body like stock, don't tap into it to steal pressure for something else.

If you are nearby, I highly recommend Dave. He's worth double what he charges!

Brian

 

dumb ? but what is a PFC im new to the rx7 game

 

All 1600 cc. ...... f9 halltech 12A680hp.......... any questions???????? BOOST!!!!!!!

 

i am running 550 and 1850 with no problem. running hks fcon v gold pro computer.

 

PFC = A'PEXi PowerFC - a standalone that replaces the stock ECU, connects to the stock plugs, and uses the stock sensors.

-Max

 

I'm also running a 550/1600 combo with the Haltech e6K. Old engine was perfectly smooth but now I had to tune out a light stumble at the crossover with my new engine. Just required a little dyno time and now it runs beautifully.

 

I thought that idel was suppost to be fine long as you didnt go with bigger pri??? Do any of you have a little trouble starting your cars when the engine is cold??

 

AJC13B has 750/1650 i think, he will probally post