ChemMan

From what I have read, if I bolt on the k24's I have I will get about 1.0 bar of boost. In order to maximize the effects of the k24's, I cannot exceed 1.2 bar. Therefore, I need a wastegate kit to get to 1.2 but the tuning to limit exceeding 1.2 bar.

Is this correct????

I am trying to figure out everything I need to do to put on my k24's and decatted fvd exhaust. There will be a 5 bar fpr and tuning to accompany it. Softronic tells me they can eliminate/hide the CEL from the O2 sensors so I do not need extenders.

Thanks

32krazy!

flawed info your getting. oem wastegates open at .7 bar on k24 turbos. aftermarket 1 bar wastegates open at 1 bar obviously. the tune will dictate how much boost you can run as will the fuel being used. running e85 and supporting mods you can safely run up to 1.5 bar on k24. most tuners stay at 1.2 bar due to fuel (93 oct) as a safety factor to keep detonation down.

5 bar fpr is a cheap way to keep from doing what you will eventually need. bigger injectors. i have a gmg 3" exhaust and no cel and no extenders. research your tuner more carefully.
before jumping into new turbos i would suggest you install all the supporting mods needed to maximize your cars setup. whether k16 , k24 or 3076 turbos intake, i/c fueling exhaust all play a major role in how much performance you get out of the car.

Kevinmacd

You may find that the k24s will have more lag due to larger spool up time.

32krazy!

if you have turbo lag your in the wrong gear. its that simple. with my latest tune im spooling at 3100 rpm with my k24 turbos. the lag felt is minimal at best

"02996ttx50

no brother thats not so. k24's lag no matter what... until they don't. i spool at 2k with 16/24's. THAT is zero lag.

stilov

I've got k24/26 and I really don't feel like its terribly laggy.

It had an FVD tune when I bought it, since then I had markski tune it and put on 1 bar wastegates. Seemed like it made it even better.

I can't imagine what the k16s would be like.

Someday I'll go 24/18g or 24/20g. But it's the thought of all the supporting mods that makes my wallet hurt.

Kevinmacd

32 Krazy - You especially feel it on starting from a dead stop.The k24s come in latter then the 16's. Unless you are on the track or somewhere where you can continually keep the boost with the revs the gearing is a moot point.

"02996ttx50

i remember the neck snap once the stock k24's got up to speed lol

32krazy!

unless im racing starting from a stop is like any other turbo car. if im racing i can launch at 4500 rpm on 2 step launch control. no lag at all. do k16 spool sooner than k24? sure. just like k24 spool faster than a 30 g turbo but the bigger turbo will out pull the smaller every time. as i stand by my statement if theres lag your in the wrong gear.

my car is giddy above 3000 rpm not the turbos fault thats were the motor is happiest. the turbos just multiply that feeling

Kevin

If one was to compare apples to apples. A engine fitted with the same exhaust, same fuel octane (same timing maps) same cams, same displacement >>running a larger turbine wheel and larger turbine housing will take more time and more the boost curve up the RPM ladder. Stock K24 vs Stock K16's with each producing 1 bar of boost based on similar engine mods will have 750 to 800 RPM's difference WHEN the target 1bar is reached. The ECU is modded in both applications to allow 1bar of boost. Typically the K24's will hit one bar at 4250 to 4400RPM's with the K16's rolling in around 3500 to 3600RPM's.. One can log this in 3rd gear/4th gear with engine RPM's starting at 2500RPM's...

Look what Porsche has done with the 997TT/GT2RS platform. Search for the factory engine power sheet and see how soon 500NM is obtained. It's in the mid 2500's.. All done with a smaller KO4 turbine wheel. The stock K16 turbine wheel dwarfs the KO4 wheel. With the boost reaching 1.4 bars.. The compressor wheel is larger, more efficient and lighter...

Stock K16 compressor wheel (actually its a K24 wheel -stock) will max out at 1.1 bars.. The K24's compressor wheel (K24 and slightly larger than it smaller brother) is maxed out at 1.2 bars. Neither turbocharger will maintain these pressure levels across the RPM band to redline. A stock K16 can peak 1.4 bars for a brief second.. The K24's can do the same thing..

For drag racing or road racing (track with long straights) the K24's shine. 4500 RPM's shift splits will keep the turbine wheel spooled up producing boost. However, for the street and normal dialing driving and tight road courses the K16's shine.

But then again, it comes down to drivers wishes and what they enjoy. There is no right or wrong. Driver wish/desires are different. 34 My recommendation is to find a Rennlister and arrange a drive! If you have K16's fitted. Work with your tuner and flash the ECU to get you the higher power levels/ tell him that you have K24's sitting in a box..

XxDesmoxX

What does this mean? Explain it to me like I'm a 2yr old please.

Asking for a friend.