Seems to me there are limited upgrade options for the Turbo engine, and even less for the NA?

Can anyone point me in the right direction to research NA ECU upgrades?

 

The only NA option is the RTek, and only for S5.

http://www.pocketlogger.com/index.php?pid=rtek7

Otherwise you need to go with a full standalone, which would be my recommendation regardless.

 

Depends on what you want. An safc isn't really an ecu upgrade but it allows you to adjust fuel +/- 50%.

 

Not true anymore. Chris Ludwig (www.ludwigmotorsports.com) now has an S5 ECU that is programmable. You'll find him here as C. Ludwig I believe. He posted some dyno sheets over on IT.com. Not much to gain on the top end, but the gains he posted under the curve were tremendous and very worth it.

 

I was thinking SAFC... but was looking for more options

 

well there really isn't a point IMO, unless you are going w/ some wild porting an S-AFC or the Rtek would be more than sufficient for your fuel control needs.

 

Yeah, it's called a RTEK2.0 https://www.rx7club.com/forum/showthread.php?t=668832

 

I guess that's only for the 1.x series, because the 2.x series is for the S4 as well.

 

There is an S4 2.0 version now as well.

 

Is the S4 2.0 version for a purely stock setup or one with numerous modifications.

 

Yes.

It allows you to alter fuel and spark, and other settings via a PDA. It's basically as close to a standalone as you can get without going to a standalone. You don't have to redo any harnesses or wiring work with the 2.0, you just have to send in your ECU and wait.

 

what about the Apexi Power FC ????????
its suposed to be a kick *** setup fromo what i understand

 

the cost of running a power FC and tuning it is about half the cash value of an n/a car.

 

The 2.0 allows full control over fuel mixture and timing (independent adjustment of leading and trailing). It's standalone type control in a plug n play package. The ECU ships with the stock program in place and the user can then tune as they see fit to extract maximum power, just as they would with any standalone. 2.0 also includes some useful datalogging features and some other little nuggets of use. We've used the 2.0 on completely stock engines and full-race prepped ITS road race cars and have shown solid gains with both. See our website for dyno charts. www.ludwigmotorsports.com In short, the stock fuel curve leaves much to be desired.

The other versions of the rtek chips are no adjustable prom chips that are meant to allow swapping larger injectors in TII applications without overfueling off boost areas of the fuel curve. They don't provide for the same tuning ability that you get out of the 2.0. The reason they're not offered for the NA is that there really is no need for them as the NA injector is plenty large enough as it is.

 

interestring, mine is s4.... then SAFC like upgrade?

 

You can also go with a Megasquirt, and there's even a plug and play version. Tuning it will be more involved than tuning an SAFC or Rtek, but it's more flexible and has more options, making it a more powerful system if you want to get more radical.

 

We also have plug n play Haltech units for the S5 too. Just choose your poison.

 

where is the plug and play squirt? which version?

 

https://www.rx7club.com/group-buy-center-69/zeal-engineering-plugnplay-megasquirt-group-buy-533404/

 

Why do you need to mod the stock ECU on a non-turbo?

If you wanna play with fuel and spark, just go full stand-alone EMS.

If you really want piggy-backs, AFC + ITC can give you what you want.
That IT-C is pretty rare, but it does pop up on eBay.


-Ted

 

The stock box is already available in a mod version. The rtek gives you a lot more resolution than the AFC plus timing control of both leading and trailing not to mention some useful datalogging features. It's just a lot more capable system than the AFC and there is no wiring to fool with. At $400 it's cheap enough to compete on price point as well.

I've setup the same ITS car with a fuel pressure regulator under the old rules, an rtek, and with a Haltech. Using a fuel pressure regulator you can produce an optimum a/f ratio at any one point through the rev range. And typically you would optimize peak power. So peak power ends up being a push between those three methods of tuning. The rtek and Haltech can deliver more power below and above peak than the fuel pressure regulator alone by way of giving an optimum a/f ratio through the entire rev range. The Haltech (or any standalone) can't deliver more power than the rtek anywhere because they're doing the same thing at the same points in the rev range. So why spend more money unless you want the ability to control aux functions or want the expansion capability for later?

 

Well, racing usually becomes a matter of how much money you wanna spend?
The "ringer" combo is to stuff MoTeC guts into a stock ECU box and redo all the pinouts to match the stock engine wiring harness.



-Ted

 

Well that used to be untill they changed the rules and ECU's are now open.

 

Ted's on it like a spider monkey!

 

Floyds *****..... that town name makes me laugh every time I hear it!