W-talon,

I've seen you post that the stock turbo is only efficient to 25 psi. Can you explain why you say this? The reason I ask is because I've seen several cars, mine included, go well past 25 psi with a corresponding power increase. Could it be pushing hot air? Perhaps, but it's still making more power.

 

The way to find out is by going to the Dyno(something I am going to do within a couple of weeks). I will go and start at around 23-25psi then work the way up.

 

That's what I did over at Mynes. We kept bumping the turbo up and dialed it in to make peak power. I think it was just at 28 psi.

 

Based off studies done and posted efficiency maps. What sort of corresponding power increases did you get above 25psi? We can all spike above that and get a nice torque bump, but trying to sustain boost like that is not beneficial. I personally have made more power in terms of trap speed with right around 24psi than when cranking the boost fully to 27-28psi, but I'm not saying my one experience is the end-all proof for every 16G6.

 

Guys, go back to the first page and look at the 4th picture that I added. Before I installed the Defi PSI boost gauge today I was reading on the stock MR boost gauge the number 76(vacuum). That means I well, well surpassed the boost limit of 1.5 bar all the way clockwise to reach the vacuum reading.

For all of you guys that are running the Mitsubishi tripple kit gauge(or MR gauges), my 29PSI on the Defi gauge equals to the vacuum 76 reading on the stock Tripple meter kit from Mistubishi.

I just made some simple calculations and by looking at the stock factory gauge(MR gauge) now it makes sense. The distance between the 1.5Bar and the 76 vacuum reading is about the same as from the 1.1bar to 1.5bar.

This means that I was running aprox .4 bars more above 1.5(1.9 bar total maximum boost) which equal around 28PSI..

Remember, look the pics that I posted on the first page again!!

Thanks!!

Carlos

 

Stock turbo + stock FMIC + no injection may be effecient only to 25psi... like everyone and their mother likes to say... HOWEVER, once you start adding some supporting mods, the effeciency changes completely.

I've ran anywhere between 29psi ~ 34psi on my car... both daily and at the track. I like staying at 2bar and found it to produce the most "safe" power. That's on the stock 9.8 turbo.

 

How do you manage to put so much boost on a 9.8 hotside turbo?, 34PSI on that turbo is a whole lot of boost. I read your signature and I know you have a lot of mods but I would never guess that little turbo could push so much.

I mentioned yesterday the theory of the stock turbo pushing a lot of hot air once it reaches a extreme boost efficiency, I am wondering if any one could tell me if by changing the intercooler to a much bigger core would ultimately fix that issue(hot air) consequently maximizing the capabilities of the turbo on the high boost range(26 and above).

I keep forgeting I am at 3100feet altitude, my best friend Sergio(Evofunk) recorded a pressure drop of around 1.5-2PSI going from Tucson to Colorado Springs(5900feet)

I also notice similar pressure drop when I once went to Pikes Peak. It kind of makes more sense now, I could push 31-31.5psi at sea level I guess.

 

I've had the same findings as warrtalon on this. On the dyno.

with 100 octane, tuning for 1.7bar (24.6psi), with my current mods (still stock fmic and IC piping), upping the boost to 1.8 (26psi) gained only 2whp and 6wtq.

It might be because I am still running the stock fmic and piping but I saw no reason to go over 1.7bar on my car the way it sits. The very very small gains didn't seem worth it to me, espically since I tune my car for the open track, not drag.

 

ya i dont see how a 16g would ever make 34psi with out blowing up or geting major boost cut hehe. but hey who knows i would like to see vid of that one.

 

I am just shocked to hear that the stock turbo could go that far, 34Psi is completly unheard. I have heard people saying that they run 30psi with alcohol/methanol, race gas and many other mods, 34 PSI sounds like a monster turbokit.

I know 30PSI is obtainable, I rode on Slowcar and I even drove Slowcar and it nearly reaches 28 Plus Psi.

Bishiboy running Methanol on his coolingmist also claims similar boost reading but gives us a credit of at least 1.5-2 psi(add 1.5-2psi to what we are making) for being over 3000 feet

 

When I incorrectly hooked up my new MBC I spiked to 34 PSI too. It was no big deal since I had #10 nozzle spraying pure Methanol.
Normally I let it spike to 30 PSI and fall where it be. It is 9.8 hotside also. Gotta love the sledgehammer hit in the back with that TQ spike >=)
Dynoflash CUSTOM is tune is the shizzle!

 

Mods please. WHP/TQ? I am thinking on going number 10 as well
Thanks

 

Mods at the time I remember are: BR Stage-4 (Helix3" DP, 3" TestPipe, HKS 3" Catback with neck removal), HKS 272/272+Gears, Exedy Twin, and Custom DynoFlash with 93octane and Meth Inj. DynoJet AWD ~400/400 at the wheels. I broke into 11's with this setup minus the spare tire. :}

 

Carlos,

So your car is boosting a constant 28 psi? No spike and holds 28 psi till redline? When I had similar mods on my car, less the alky, my boost would always drop 2-3 psi near redline from whatever it spiked at.

 

No, I am peaking 29ish(close to 30psi) but it drops to around 21. I still maintain 23 plus by 7000rpm but just so everybody knows I was tuned to 8000rpm which actually surpasses 8000rpm, 8100rpm to be exact.