Any S4 T2 Guys Running This Ecu Chip? - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
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2nd Generation Specific 1986-1992 Discussion

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Old 06-07-2004, 12:15 AM   #1  
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one of my buddies was thinking about getting this chip but wants to know if theres anybody thats running it and could help out with any info dealing with it..

there site says



New features include:



New line of RX-7 upgrades. The ECU Upgrade is a replacement ECU chip for Second Generation RX-7s. This unique upgrade offers features not found anywhere else in such an easy to install system.



Chip is only for S4 TIIs Version 1.0 Version 1.5

Single replacement ECU chip. As of now other models are being planned



No wires to splice, no "black box" clutter

Built in Fuel Cut Defenser (FCD)



Extends engine life by defeating the Accelerated Warmup System (AWS)



Easily clear an engine flood without opening the hood



Lower secondary injection to ~3500rpm



Increase primary injector duty cycle cap by ~5%



Timing retard above 9psi ~1deg per psi





FCD:



The stock ECU will cut fuel to the rear rotor when boost hits the fuel cut threshold of about 8.6 psi. Although this was put into the stock ECU as a protection mechanism, it's a quite harsh mechanism and not required for mild improvements in boost.



Up until now, a Fuel Cut Defensers (FCDs) have been external devices wired into the engine harness that interrupt the signal from the boost sensor to the ECU. The Rtek7 goes goes right to the source by removing the code responsible for Fuel Cut from the ECU altogether. This has the additional benefits in that it doesn't alter the boost signal to the in-dash gauge, there are no wires to splice, and no additional box to clutter the engine bay.



CAUTION: Running too much boost without enough fuel can destroy an engine. Even though the FCD is built into the ECU, it is the customer's responsibility to address fuel requirements separately.



AWS:



When you first start your RX7, the ECU will rev the engine to approximately 3000 RPM's - this is the Accelerated Warmup System (AWS) in action. The purpose of the AWS is to warm up the precat. Of course, one of the worst things you can do to a cold engine is high revs. This mod removes the AWS code from the ECU allowing your car to idle normally when cold.



Flood Clear:



The Rtek7 Upgrade eliminates the need to pop the hood to pull a fuse when the engine is flooded. Simply press the accellerator to the floor and crank. The ECU will now stop fuel delivery for as long as you keep your foot on the floor.



Lower sec inj point to 3500:



Normally the secondary injectors start adding fuel at 3800 RPM. The problem is that the secondary injectors will not come on below this rpm regardless of the boost being run. This can lead to cars running lean below 3800rpm even if they have larger injectors, fuel pump etc. Lowering the RPM at which the secondary injectors come on allows them to add fuel before the primary injectors start to max out.



Increase primary injector duty cycle cap by ~5%:



Raising the cap allows a little bit more out of the primary injectors. This works in conjunction with the lower Secondary Injection RPM to smooth out air/fuel ratio and get rid of the lean spot.



Timing retard above 9psi:



The stock ECU has no additional timing control for above around 9-10psi. This mod extends the timing control to give a little more safety for those running 9+ psi. Timing is pulled about one degree per PSI.
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Old 06-07-2004, 12:38 AM   #2  
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quite a few people already are, for more information search teamfc3s for posts by the user name henrik.
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Old 06-07-2004, 12:56 AM   #3  
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Sorta of off topic, but there is no need for timing retard past 9psi. The stock ecu runs like 8-9deg advance max. @ 15psi even most guys with haltechs run 15degs...
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Old 06-07-2004, 02:12 AM   #4  
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If there were a similar chip for NA s4's, I'd be interested...
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Old 06-07-2004, 02:15 AM   #5  
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Quote:
Originally Posted by baller520' date='Jun 6 2004, 09:38 PM
quite a few people already are, for more information search teamfc3s for posts by the user name henrik.
Ibsen?
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Old 06-07-2004, 03:13 AM   #6  
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Quote:
Originally Posted by 1Revvin7' date='Jun 6 2004, 09:56 PM
Sorta of off topic, but there is no need for timing retard past 9psi. The stock ecu runs like 8-9deg advance max. @ 15psi even most guys with haltechs run 15degs...
Where are you getting these ignition advance numbers from for a stock ecu?
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Old 06-07-2004, 03:29 PM   #7  
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Quote:
Originally Posted by ambassador_josh' date='Jun 6 2004, 11:12 PM
If there were a similar chip for NA s4's, I'd be interested...
there site says there going to be coming out with chip for the other models but rite now theres just the s4 t2 going on..
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Old 06-07-2004, 04:31 PM   #8  
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Quote:
Originally Posted by baller520' date='Jun 7 2004, 03:13 AM
Where are you getting these ignition advance numbers from for a stock ecu?
j9fd3s
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Old 06-07-2004, 04:40 PM   #9  
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Whats the site for that chip I wanna check it out.
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Old 06-07-2004, 05:12 PM   #10  
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www.digitaltuning.com



Quote:
Originally Posted by 1Revvin7' date='Jun 7 2004, 01:31 PM
j9fd3s
Where did he get them from? I've searched around trying to find ignition advance, and the ignition split on a stock ecu for a while. Henrik created a datalogger for the stock ecu and has compiled some decent information on ignition timing, but besides that I've never seen any concrete numbers to go by.
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