07_wrex

And this alone makes me want an I series! 8-) As soon as there's a "plug-in" for the 07 STi.

Hi Dave, Ya, that's understandable. Sounds like a fun ride though! Here's a couple pictures. The valve broke off in the middle of the stem somewhere. The valve head I'm holding has been beat up and 4 3/16" pieces of stem were later found in the oil pan. I assume from punching through the piston. Everything on the top side of the head looks great. Springs, retainers, buckets (shims for a subaru), cam, and cam journals all look good. I thought I'd find the timing belt destroyed for something like this to happen after 1400 miles. Or at least some other issue that might cause this. Timing belt was fine and the engine was still in time when I took it apart. I'm sure it was just a bad batch since I can't find any reason why it would fail like that. I don't rev the car to their (supertechs) recommended rpm limit of 9500...or anywhere near that. Sean

Dave, Ya. I figured. Just checking. I haven't really looked at any other manufacturers setup on rpm limits. The car has seen the limiter maybe only a few times. The reason for this thread is that I recently had a super tech stainless intake valve just decide to break while I was cruising. No boost and not getting on it. It destroyed my 1400 mile closed deck short block. Most likely beyond repair. I will definitely be going with another brand of valve. I just want to make sure I didn't cause this with my tune. I'm 99% sure it's just a bad valve. I documented the long block tear down and it didn't jump time or anything like that. I really don't want to spend another $9,000 just to have it happen again in 1400 miles. lol. Thanks, Sean

Thanks Dave, Would you suggest a longer soft-hard cut window on an engine making 800 whp? Sean

I have not tried the standard rpm limit. so, you're saying that it will start fuel cut 250 rpm before the value in the rpm limit table if I don't use advanced?

Hey guys. I will include my pcl file so you can look at my settings. I would like a softer rpm limit. I initially had it setup per the help file. It was pretty harsh when it hit. I have changed a couple things on this map and would like your thoughts on it. Basically, I see so many cars where you can hold it on the limiter and not really hurt anything. I don't want to destroy valves after a handful of times on the limiter. I'm not planning on holding there by any means, but it is brutal the way it is setup according to the help file. Thanks, Sean closed deck tune 2 40 psi timingNEW1.pcl

I have kind of a similar question. When my A/C kicks on, my AFR goes super rich. 10.0-10.4 to 1. I have all three of the mentioned fields set to 0.00 ms. It doesn't make a difference. Is there another table? or can I go negative with the trims? Hmm...Apparently it will let me enter a negative value. Haven't tried it on the car yet though. Thanks, Sean

Dave, I do not have tumble generator valves. Those are long gone. I have spent quite some time on my pcl file. I have an ethanol sensor and have set it up to be completely pump and go, so to speak. Base fuel and ignition maps for regular 93 octane pump gas. And then all the overlay tables for various situations vs ethanol content for e85. But I'm sure that's exactly what you could tell by looking at it. I'm pretty proud of it. Lol. Just trying to fine tune it. The car made 711 whp on a mustang dyno at 41 psi. (817 ish on a dynojet). Thanks, Sean

Lol. Its only active at 90%+ throttle. I know I can change that, but why would I? Obviously flat foot shifting the car would stop the issue because I'm now avoiding actually letting off the throttle for a shift...that's not going to fix the issue unless I'm racing someone. Maybe explain what you mean unless you're joking.

Dave, Thanks. I was just making sure I wasn't missing an actual decel fuel table. My aem stand alone had one that was the opposite of accel and separate from the main fuel table. I will try to play around with it when it dries up here. Thanks, Sean

Also, the part about the other values in the 0 row helping idle is from the vipec help file. Though it should definitely be 0 from 2000 rpm and up.

I will change everything above 2000 rpm to 0 (at 0). When you say decel, are you referring to decel fuel? As in the opposite of accel fuel? Is there a table I'm not seeing? That's what I was asking initially. My overrun fuel cut works like it should and I have no problem with it if that's what you're referring to. Just making sure we're on the same page. Its the fast throttle close when I shift that causes it to go super rich. I understand the injectors can only shut off so fast maybe? But if I try to shift really fast (climbing a hill trying to catch the next gear so I don't lose momentum) it loads up fuel and pops and then goes like normal. I'm trying to get rid of that. Its only below 3000-3500. Maybe I'm just too picky. Thanks, Sean

Dave, It is supposed to help the engine idle. Would it be better to set those to 0 and use the idle speed control as the only means of idle control? Other than idle ignition that is. My fuel pressure is right around 50 psi base pressure.

re you suggesting I use those tables to fix this issue?

Scott, I have a boost gauge that reads to 45 psi. When the spike occurs, I'm 99% sure it isn't actually hitting that amount of boost. I have the cal table setup for my map sensor correctly. It should stay at its highest value even if it sees more pressure. I would think anyways. My thought is that maybe I am maxing out the map sensor and for some reason it reports a weird voltage after a certain pressure causing the vipec to think that its a super high pressure and that's what triggers the map limit and all that. I have looked at an aem 5 bar map sensor. Any other suggestions on a 5 bar? I have run the car in open loop. No issues really. I haven't done any multiple gear pulls with open loop though. I also have no issues with consistent boost pressure with a manual ball and spring controller. So stage 3 at 0.3 is the time stage 2 is active before stage 3 comes online? Would it be beneficial to change that? And what exactly would it change in the way closed loop controlled certain situations. (Quick shifting, etc.)