Hurricane 270 tune difference compared to 300 header tune?

[sideshowBob]

Any of you guys hitting the boost cut out at half throttle acceleration? Right around 23 psi boost.

No I have not experienced that with my sled but I have the stock intercooler...for now....

 

[hpmaniac]

Has anyone installed a motec ecm in a sidewinder? i love the motec in my can am, easy tuning and very stable, you make a change and it does the change and stays that way. It is not good running injectors up near 100% duty cycle, a larger injector and good fuel pump might make these much better for stability and day to day changes.

 

[hpmaniac]

Boostane is great but can really mess with wideband readings, i see this with my hellcat data logs.

 

[Turboflash]

You have to remember that 998 guys are a greedy bunch, and they are running hardware beyond what the tune was developed on. I dont care what brand tune a guy runs, when you put on bigger mufflers, ram air intakes, bigger intercoolers and other hardware that the tune wasn't developed for, they are going to go lean and change with the wind. You should see how lean some of these things run, and then people decide not to use closed loop and data log...

The stock injectors are out of fuel using "300 HP" tunes with good hardware. I know some guys running 3" mufflers and intakes on 280 PEFI sleds and they are extreme lean. They get by with it by throwing in some race fuel to keep them alive. The PEFI setups are not supposed to be using any intakes or mufflers larger than their own 2.5" trail muffler that does not flow much. The little turbo is out of air right along with the injectors being out of fuel in the so called "upper 280-300 HP" levels. I'm not sure there is a true 300 pump gas setup out there on a real engine dyno myself with stock injectors and turbo, (Tommcat had 297 real engine HP I believe on a stage 4 PEFI setup he dynoed, and I think he even had cams in that engine, they are claimed to be 320HP on pump gas stock engine from PEFI).

These ECU's are not much to write home about for consistency day to day either. They are severely lacking in different areas compared to good automotive stuff out there. Basically the ECU is a POS in comparison. We chase them day to day with the changes and there no consistency in them. They are all over the board and no two sleds are the same.

PEFI Stage 4 is a 4 bar tune. FP = 58/59 psi key on engine not running. Makes up for injectors probably being too small at 43.5 psi fp.
I have cluster flash too so all 5 tunes are now 58 lb tunes.
They still want you to run their 2.5" restrictive "performance" trail muffler. I run 3" Sandale, a bigger intercooler, so my fp is higher than 58 to make up for it.
I don't get boost cut at all. Our baby turbo is all done about 280. When I ran on track dyno, on what PEFI calls "Full Race map" w C16 and waste gate locked (at .015") max hp was way down at about 7800. Turbo can't pump any more.

 

[sideshowBob]

PEFI Stage 4 is a 4 bar tune. FP = 58/59 psi key on engine not running. Makes up for injectors probably being too small at 43.5 psi fp.
I have cluster flash too so all 5 tunes are now 58 lb tunes.
They still want you to run their 2.5" restrictive "performance" trail muffler. I run 3" Sandale, a bigger intercooler, so my fp is higher than 58 to make up for it.
I don't get boost cut at all. Our baby turbo is all done about 280. When I ran on track dyno, on what PEFI calls "Full Race map" w C16 and waste gate locked (at .015") max hp was way down at about 7800. Turbo can't pump any more.

What kind of boost are you running with the header ect?
It would be interesting to see your AFRs at that kind of fuel pressure.

 

[hpmaniac]

I can see a turbo upgrade making a massive difference on this engine.

 

[Turboflash]

What kind of boost are you running with the header ect?
It would be interesting to see your AFRs at that kind of fuel pressure.

Boost levels off at 17-18. AFR 11.8-12.0. Based on my AEM AFR gage w Bosch LSU 4.9 O2 sensor.
I wonder how injector pulse width would compare to 3 bar tune with header. It's how PEFI gets around needing bigger injectors for Stage 4.

 

[0degC]

PEFI Stage 4 is a 4 bar tune. FP = 58/59 psi key on engine not running. Makes up for injectors probably being too small at 43.5 psi fp.
I have cluster flash too so all 5 tunes are now 58 lb tunes.
They still want you to run their 2.5" restrictive "performance" trail muffler. I run 3" Sandale, a bigger intercooler, so my fp is higher than 58 to make up for it.
I don't get boost cut at all. Our baby turbo is all done about 280. When I ran on track dyno, on what PEFI calls "Full Race map" w C16 and waste gate locked (at .015") max hp was way down at about 7800. Turbo can't pump any more.

How much boost do you see with waste gate at .015 ?

 

[Turboflash]

How much boost do you see with waste gate at .015 ?

Couldn't get past about 22. Turbo too tiny.