Rtek FAQ: Read first!!
 

digital tuning main Rtek7 Page:
http://www.pocketlogger.com/index.php?pid=rtek7
Nearly all the questions answered here, and more, are answered on the website.

Model Compatibility:
Stage 1.5, 1.7, and 2.0 all available for S4 TII only. Others in development.
http://www.pocketlogger.com/index.ph...age=2&ecu=S4T2

Stage 2.0 details:
http://www.pocketlogger.com/index.ph...ecu=S4T2&det=h

Are there changes to the fuel maps in Stage 1.x upgrades?
No. The only differences in fueling are that we allow the primary injectors to run 5% more duty cycle, and on the Stage 1.7, we compensate for 720cc secondaries. The fuel maps are not touched.

Are there changes to the fuel maps in Stage 2.x upgrades?
If the correction map is zeroed out, the fueling is exactly the same as stock, with the exception of if you have something other than stock injectors selected, then the ECU will compensate for them, but the target A/F values will remain very close to stock even with the bigger injectors installed. Obviously once changes are made to the fuel correction map by the user, this is no longer the case.

What injectors can I run?
The Stage 1.7 upgrade expects at least 720cc secondaries.
The Stage 1.8 upgrade expects at least 720cc primary and secondaries.
The Stage 2 ECU upgrades have injector presets built in. This allows you to run any of these preset configurations of injectors without having to manually lean the A/F mixture to compensate for the larger injectors. By simply checking the correct checkbox in the software, the ECU is "told" what injectors are installed and automatically calculates injector pulse widths accordingly.

Can I use injectors larger than 720cc??
Injectors larger than 720s (Stage 1.7/1.8) or the presets (Stage 2) can be used but they aren't as "plug-n-play".
Never use an injector that flows LESS than the preset you are using. i.e. if you are using 550/680cc injectors, use the 550/550 preset and use the Fuel Correction Map to lean the mixture. Using the 550/720 setting can cause a lean condition and may result in engine failure. Never use less than 720cc Secondaries when running the Stage 1.7 chip.

Injectors larger that 720cc are commonly used and can be used with any Rtek7 upgrade. For Stage 2, you can use the 720cc preset to partially compensate for the larger injectors and then you will need to use the Fuel Correction Map to compensate the rest of the way. With Stage 1.x chips, you will need to have a fuel controller like an AFC to enable you to lean out the larger injectors.

Also note that having a large difference between the primary and secondary injector size is not recommended as they make tuning the secondary transition very hard to tune. It's always better to go with 4 slightly larger injectors, than small primary and very large secondary.

PDA Compatibility
http://www.pocketlogger.com/index.php?pid=faq_pda_list
Compatible Palm PDAs can be had off ebay for less than $40.

Can I use a laptop to tune the ECU instead of a Palm PDA?
Not at this time.

How much boost can Rtek upgrades handle?
The stock MAP sensor will only read up to 1 BAR (14.7 psi). While you could run boost pressures above that (with the proper knowledge and A/F monitoring), you are past the point that the ECU would 'know' that you are above 1 BAR. This somewhat limits the ECU's ability to make corrections and is past the point of the Stage 2 user adjustable maps (for now).

How much HP can I the Rtek handle/make?
There is no way to put a number on this. It all depends on your supporting mods and ability to tune safely. The Rtek upgrades don't make power directly, but enables your other mods to make HP safely. The Rtek Stage 1 chips add a cushion of safety when you start pushing things. Stage 2 adds fuel and timing control to that safety cushion for added flexibility. Monitoring with a W/B o2 is very highly recommended. They are cheap enough nowadays that if you blow up your motor trying to tune without one, you should be hung from a tree, a rotor tied to your feet and apex seals shoved under your fingernails.

How much adjustability is in the Stage 2.0?
Fuel correction varies depending on the ECU. Typically either +/- 37% or +/- 50%. This adjustment is on top of the correction made automatically when you select other than stock injector presets. i.e. When you select an preset that has 720cc injectors, the ECU removes ~25% from the duty cycle to compensate for the larger injectors. Then you also have the adjustment range in the fuel correction map for a total adjustment range that is greater than the limit of the fuel map adjustment alone.

Timing adjustments are not limited. You have direct access to the stock timing maps.

Does the Rtek eliminate the AFM?
Currently it does not.

Can I view logs on a PC?
Yes. Download the viewer from this page http://www.pocketlogger.com/index.php?pid=utilities

How do I get my logs to my PC?
http://www.pocketlogger.com/index.ph...faq_gs_viewlog

Can I log a Wideband O2 Sensor?
Yes, you can connect the 0-5 output of your WB02 Controller (must be a linear output) to the ECU.

How do I connect the WBo2 to the ECU?
RTFM. :) http://www.pocketlogger.com/instruct...cketlogger.pdf
See the "External Sensor Setup" chapter towards the end.

Can I go back to stock fueling/timing?
With the Stage 1.x upgrades, going back to stock requires soldering. The stock chips must be put back and any PC board mods must be undone.
With the Stage 2.0, to go back to nearly completely stock, you can initialize the ECU from within the software and, poof, you are stock again.

Q: If you upgrade from 1.5 to 1.7 or 1.8 do you need to send the ecu in, or is a chip mailed to you?

When the 2.0 s4 TII is recieved directly from you guys. Does it have the timing maps for higher boost already pre-tuned up to a 15 psi? If so, how conservative did you guys go with the timing?

ANd both leading and trailing timing maps can be tuned?

the ECU is fueled exactly like you sent it to us...stock.

Since the ecu is sent back with the same maps loaded, will it just plug back in and run? In other words does one have to use a Palm to initially set it up again before starting? I ask because I don't have a Palm at the moment but wanted to get this done and back in the car running. Then a little later get the Palm and start tweaking. I'm hoping that it will plug right back in and run like stock.

You will need to set a setting or two for it to be exactly like stock.

Without a Palm, can I just plug the ecu back in and have a running car?

I just bought mine today, but from the instructions, it does not sound like it. At least the instructions do not explicitly say that. There are a couple settings that need to be verified upon initial connection.

Please read the manual about the initial setup for information on what will be different.

You can get a Palm off ebay for $20, if you're putting $400 down for the Rtek, you really aught to spring for a Palm.

Don't over analyze my question. I fully intend to get one. However I wanted to know that I could have a running car for the week or so that it may take me to get one and get it set up. It has nothing to do with not wanting to get one. I don't want my car down any longer than the ecu is gone and if I can't get a Palm before the ecu is back, I still want to drive the car. That's the whole point of the question. Can I drive the car (for however many days necessary until I get a Palm) by merely just plugging the unit back in or not? It appears I can't which throws a wrench into things. I'm very busy right now as I'm getting married in 2 months and will everything going on right now, I don't have alot of time to do anything. I do have time to remove the ecu and send it off and then reinstall it later.

I'm curious if im limited to the flow of the AFM or am I able to tune with map sensor as load beyond the AFM ability. Hurry up with getting rid of the AFM if this was done I would have bought the 2.1 already

yea, im waiting for rtek to eliminate the AFM as well lol i just bought 1.8 so we'll see how that goes

Why isn't there a S4 NA stage 1 chip?

looking forward to getting the 1.7....sorry noob question....its direct plug and play after you get it back from rtek right? no splicing needed?

I have a sony pda with palm. I got it tunned yesterday is there way to save his map on the memory car?

I assume you mean memory carD. If so, there is no way to do that. You can save it to your Palm, then hotsync the Palm to your PC and you will have a copy on the PC.

lol.. yea I meant card..lol. So how do I save the map to the palm? Do you have a link to instruction for it? thanks

The manual is available on our website. Just click the RX7 button at the top and all the information you could ever want is there.

I have a vert which version would work for me?

Thanks for the lovely link! Unfortunately I have already read all that. It would seem that the Stage 2 is the only offering for S4 NA cars but unfortunately it says "N326 & N327 ECUs only", the convertible has a different ECU N338 for the '88.

Am I to assume its just not covered then?

what are the numbers for the afm and map? if they are the n/a numbers( 327 and.. 327) then an n326/7 should work. If they are the turbo part numbers(n318 for map, afm can't remember) then you would want an n332/3 turbo ecu for your car...even if it is n/a.

This is a Really good point he brings up, supposedily n338 vert ecus are for an NA engine, but also will work with turbo cars.

or turbo2ltr will tell you to not have the n338 ecu chipped at all, and just send in an 326/7 if you're sticking to n/a, or send in the n332/3 if you are planning on a turbo.

the n338 is kind of a mystry ecu.

To be fair, you only said vert, which most of them are 89-91, and there fore you woulda seen n352/3 listed.

If it's an N338, the S4NA Rtek should work fine. I can't say I've done a whole lot of them. Searching back my emails, I see two people since 2003 asking about it.

Our research shows that the N338 is basically the same as an N326/N327. Contrary to popular believe it will not run a Turbo motor any better than an N326/327.

Thank you guys!!!

Above it says
"Injectors larger that 720cc are commonly used and can be used with any Rtek7 upgrade. For Stage 2, you can use the 720cc preset to partially compensate for the larger injectors and then you will need to use the Fuel Correction Map to compensate the rest of the way. With Stage 1.x chips, you will need to have a fuel controller like an AFC to enable you to lean out the larger injectors."

My question is will I be able to run 720cc or 750cc secondary injectors on a Rtek 1.7 without a AFC? Or do i need a AFC to lean out the injectors?