Hey guys my car is almost done! Bwahahaha. I am just trying to think down the road and a 7,200 RPM redline sounds tempting due to my "shifting" fears. So my question is, reflashing my ECU with the technosquare should not have any effect on the unichip with the APS kit correct? This is something I can do whenever I get around to it and the process will have no effect on my car other than raising the redline if I need it? Granted I know I should go and have the 6700 - 7200 range check, dynoed and tuned, but other then that if I decide I want the extra RPMs having the reflash will not be a problem?

~Josh
(Can not type because he fiends for his car.)

 

From what I've read it seems to be better to do the rev limiter raise with a built motor.

 

IMO I think the raised rev limiter is fine for reving to 6800 or 6900, and leaving the extra 200-300rpms as a safety cushion for the fuel cut off since the engine will be reving that much faster with the higher power

 

Jergens, if the Unichip is not properly tuned to 7100rpm, that it will be extremely dangerous to run it that high in the RPM band. The APS kit is tuned to assume a 6600rpm redline. Now, its likely that Peter and his team dumped fuel after that....but nobody knows until they look at the program. Please be careful.

 

you're talking Lspec Reflash right?

doesnt the unichip do all the fuel/timing?

 

Correct, but the Unichip may only be tuned to 6600rpm, becuase unless APS had a reflash, they probably stopped tuning at 6600rpm.

The LSPEC will raise the rev limit to 7100, but I am unsure if the Unichip is tuned between 6600-7100rpm.

 

why would you cut your tuning before redline, thats dumb as ****. ive bounced off the limiter several times and no issues yet, i guess im just lucky.

 

My point is that the stock ECU is set at 6600rpm...unless you have the 300hp motors, which redline at 7100...IIRC. I would just want to double check that APS tuned the UPS all the way to 7100, becuase the first cars they test fitted had 6600rpm redlines. Does that make sense?

 

my rev limiter is 6800, not 6600. dont you mean 6800 sharif?

 

regardless.. whether it's 6600 or 6800, make sure you have tuning beyond the intended rpm level or you will blow your motor rather easily at redline on a stock motor.

 

Haha...i trust you guys more than me...since i havent had a stock rev limit in ages.

The point I was ineptly trying to make is that you just want to make sure the Unichip is tuned all the way to 7100rpm...as it MAY have only been tuned to 6800rpm.

 

The UniChip doesn't have any tuning @ the super high RPM... (Everything is 0)

However I can't remember off hand what RPM it cut out @...

AND the UniChip doesn't scale injectors like the EU, soooo all fuel is cut via the MAP.... SO 0 = MASS fuel... My map had all negative numbers on it since they have to remove fuel for the 440s all the time... the high RPM/BOOST just removed less.


One of the APS guys could chime in... but I'm 90% sure.

I should have taken screen shots... (Oh wait.. the freaking UniChip software is old crappy DOS software... no screenshots.)

 

LOL gotta love DOS, can you play pong on it as well

 

Hey guys. Well my intent is to TUNE the thing also I am not sure if it is tuned to 7100 out of the box but there are people in Florida that can monkey with the unichip software (So it has been said). I am having extra tuning done due to the exhaust and plenum setup. If I ever did take it up to 7100 RPM I wouldn't reflash and drive off, I know that you have to make sure the computer is still keeping the engine managed. Which was sort of my question. If people have retuned APS software to take into account higher rev limits.

Another question would be. Is that extra RPM left going to have bad bad effect on a stock motor. My understanding is the danger of FI is that you have so much air now and it is pressurized thus making detonation much more likely unless you keep an eye on what is happening. BUT since I would not be increasing the boost pressure... would the strain be dangerous? Or would it be minimal? I understand it will have more rotational force now as it is spinning faster. But is that catastrophic I suppose is my point...

Thanks for chiming in so far guys.

~Josh

 

+1

Right now I'm reflashed with TS Crawford flash NA, I also was wondering if I should reflash back to stock or L spec before I install the APS twins. Now I hear what Sharif has to say about unichip only tuning to 6600 I may just reflash it back to stock.

 

You should go back to stock or Lspec .
Unless you're a gamblin man.

 

Exactly, I was going to mention this. As long as you cover tuning it past the RPMs you are "allowing" the engine to now rev to, you'll be fine.

Regarding the 300 HP motors, APS had to slightly change the maps on the Unichip for those. So they do have some experience with 7100 RPM rev limit VQ35DEs now (they could have before, i'm not sure, but we know they do now).



Also, regarding the negative effects of raising the rev limit. Peter@APS strongly advises against a certain RPM limit, which I think he said something like 7000 RPMs once (don't quote me on that though). I would only do it to 7000 RPMs as well, just a preference, maybe even keep it on 6800. I've never been a high-revving-engine-loving kind of guy.

 

I have had the L-Spec TS Reflash prior to getting the kit and told Brainstorm to tune accordingly when they installed my APS TT kit.
They did so perfectly fine and my car has been running perfectly fine.
I shift at 6900 rpm at the track and it kicks *** I think the best part about it is that until now I never had to shift into 5th at the 1/4 mile thanks to the raised limiter.

 

[QUOTE=mrtomcat]I have had the L-Spec TS Reflash prior to getting the kit and told Brainstorm to tune accordingly when they installed my APS TT kit.
They did so perfectly fine and my car has been running perfectly fine.QUOTE]


Exactly....as long as you have tuner than can adjust the maps for you to the new redline, all will be fine.

But if you dont't plan on retuning your car, you will either want to confirm with Peter at APS, that the Unichip is tuned to 7100rpm, or just go back to a stock ECU flash.

 

Hey thanks guys. This is down the road as I still want to see if the car is "Done" when the current goodies are in. But we all know no car is ever done.

I would be having it remapped. My obsession has been with "can I tune a unichip for every little thing done" Technically I've been told I don't NEED to have it retuned for exhaust and plenum. But I want to have it done. Can never hurt to spend the money on the tune. Plus conditions are different all over the country etc. The only reason I'd want higher revs is to give me more of a shift cushion before cut off. When I was NA I would bounce the revs in 1st and 2nd gear every now and then, and now with FI... well having my shift light go at 6700 and having 300 RPMs as a cushion would be nice

I'll let you know what I am doing when I write my "WEEE" report once the car is back. I hope I can add something to the FI boards since ya'll have helped me so much, but I don't think I've done anything new.. I'll do what I can though

~Josh