Alrighty so ive decided to say screw it, im not going to go GMS1 and im just gonna go down the street and have ZZP HP tune my car for me. BUT, I have a few questions...

What is the max I can boost on stock MAP's? Ive read in a couple places 15... a couple places 20... and a couple places 23.... which is it?

Their basic tune is set to 22 PSI but is that safe/ok to run on stockers or do I HAVE to upgrade to the 3 bar sensors?

Also, the site says they will raise the rev limiter to 7k??? Exactly how safe is that? My car sees full boost at least twice per day and current redline maybe once or twice a week.

Car is a daily driver and I want to have the most performance as possible while keeping most of its reliability (I know they dont work well together haha). Currently the only performance mods engine wise are a K&N drop in and a ZZP HFI tube. I do not plan on getting a DP, charge pipes, CBE, or any other upgrades anytime soon, probably not in the next couple years til after I buy another house.

Thanks!

 

You can boost to 35psi on a pte6262 without "breaking" the stock sensor if you for whatever reason ever wanted to.

Point is, the stock 2.5bar sensors won't "break" if you go beyond 262kpa (about 23.5psi). The only real issue is that you're tuner can't monitor your boost levels beyond the 262kpa threshold, which is the primary reason why most people who are tuned are encouraged to get the 3bar maps.

 

Thats understandable and makes sense.

Another question I forgot to ask what what can a stock clutch handle?

 

Some will hold 340 wtq, some 360. Depends. Don't floor it in 3rd or higher @ less than 3k and it won't slip.

 

Some hold up to 400

 

Its ok to go above the 2.5 MAP sensors,t hey just wont be able to accurately read the boost above 23 psi. I am at 24 PSI and have no issues right now, but I plan on upgrading to 3.0 bar MAP sensors as a precaution.

 

Yeah, once you go above that 23 psi threshold for the 2.5 bar sensors, the ECM will only provide fuel up to that limit, nothing more. Hence the need for the 3 bar sensors. It's like telling a blind man he'll be all right by himself in traffic.

 

Lol.. Funny anology but sorry to say my man, this actually isn't true for the lnf. It doesn't enter open loop and go into sd mode at wot like the srt4's and other vehicles do. Aside from cold starts and starting after a reflash, the lnf's ecm stays in closed loop at all times and uses the maf for literally everything, including wot. With that being said, going over the map sensor threshold doesn't effect fueling at all due to the lnf using the maf and wideband sensor for all air/fuel calcs.

 

That's good to know, lol. I'm still new to the LNFs. It's just crazy how the LNF would stay in closed loop constantly. I'm so used to the closed/open loops, speed density computer/setup. Makes sense because the car is controlled by the MAF. Basically, you'll blow the turbo/engine before the "fueling" becomes an issue. That's good to know if that made any sense. Hopefully, you'll stick around so I can learn more.

 

Good info here, im a new with turbos and new cars in general so what's Open or closed loop? Im much more familiar with carbs...

 

"Open-Loop" is when the ECM does not receive feedback from the air-control sensors, or does and ignores it. "Closed-Loop" is when the ECM is receiving feedback from the engine sensors, or using that feedback, to change the amount of fueling to achieve a desired ratio of fuel to air, timing, load, etc.

 

Fyi, it will go open loop if the load gets high enough, but you still can correct for it. Problem when you exceed 22.4 psi is you could be spiking 30 psi and never know it. If you want to run 24 psi boost, pop for the 3 bar tmaps.

 

My biggest concern would be the 7k rev limit. If you want to rev up there you may want look into valve springs.

 

Thank you for this.

I have actually been thinking about going slightly conservative and requesting a 20 PSI tune with a stock or 6500 rev limit like the GMS1 rev limit. Does anyone thing this is a bad idea? I may or may not go with 3 bars, depends on what money looks like and how I feel come spring lol Car is just a daily driver but I am planning on several track days come summer.

 

If you are going to boost 20 psi, the stock sensors are fine.

 

Lt, 20 psi should be fine with the stock sensors, and it would be very conservative. Do you plan on using HPt?

 

Yeah im just gonna run down the street and have ZZP tune it for me and they use HPt

 

Cool. You should be satisfied with the tune.

 

Terminator told me that 7k was ok on stock valve springs. None the less I've only revved that high during logging. Not that I dont trust him but I dont need valve float

 

Same here. I've only done it a handful of times. But several people did have issues but who knows how often they did it or what else has been done.

 

Good to know. Makes me feel better about asking for a 6.5k limit

Good Just bought a ZZP hot side pipe for a great price and am going to grab one of their increased clearance IC's that ill put on before the tune. I know they wont give much if any power but at least it'll look better and make me less concerned about the end tanks on the stock IC


Thanks for all the help on this topic guys!