Just wanted to get opinions about something. Ive got an 2005 evo 8 with turboback exhaust a bolt on BLOx air filter and a walbro full pump. Im only running about 23 psi with it tapering down to 20 psi by redline and my injector duty cycle ramps up to 100% - 110% within the 5500-7200rpm range. Based off of my mods I should in no way be maxing out the injectors. AFR fluctuates abit but its always in the 11.0-11.5 range so shes not running rich. What could the prob be? FpR??? Fuel lines??? And what should the IDC on stock injectors be running at around 310whp or so.

 

Its just a calculated number. I ran my stock injectors to 128% using alky and a lot of guys see 115% using a walbro. Just means you're nearing the limit of your injectors, that's all.

 

Also evoscan reads them 20% higher so he's really at 90%..I agree with what you said on my stock turbo I ran my injrctors to 110% with no issues..

 

I ran my injectors to 164%idc, not on purpose tho.

 

lol damn thanks guys for the quick reply my minds abit at ease now. I know on the subarus using Romraider its pretty accurate. But I guess evoscans abit different. Thanks

 

Really? I never knew this...is this confirmed for all versions of evoscan?

 

Shouldn't exceed 80-90& IDC by injector manufacturer guidelines. Stock turbo Evos with stock 560's do run into the low 100% range when pushed though.

 

That is incorrect.

Bunch of bad info in here.

If you getting more the 100% IDC, you should upgrade your injectors. Simple.

And yes, you can max the stock injectors out with just a TBE and some extra boost.

 

From what I know about evoscan it does read 20% more.

 

I was wondering, IXMR had me confused for a minute there.
So Jay, the formula in evoscan reads IDC correctly right?

 

I have NEVER heard, seen or read that anywhere in the ECUflash forum, and I have been here since the beginning ('06). Also, I have been using EvoScan since version .97.

Do you have a link or post for reference??

AFAIK, the IDC formula in EvoScan is correct.

 

I don't recommend anyone push their stock injectors beyond 115%, but up to that is generally just fine. Mine went full-open and became uncontrollable at 119.5% according to EvoScan.

 

That's what I thought...thanks for clarifying

 

you should have changed injectors before you got near 100% duty cycle

 

My friends '05 with a br intake, br delux fmic, forge mbc, evo 9 bov, turbo xs 3" tbe and a walbor was running 96% idc untuned running 20si peak and 19psi red. In the 5500-7200rpm range the car went from around 10.3 to 9.8afr. After the tune the car ran 10.6 to 11.1afr in the same rpm range and the idc fell to around 92-94% according to evoscan with the boost untouched. Now in your situation you're running about a half point leaner afr's and 2-3psi more so I hope you can see what I'm attributing as the most probable factor(lower the boost). Try boosting 19psi, log it and adjust the timing accordingly...unless you want to go the bigger injectors route. With the 3 mods you have you could make 310-320whp(dynojet) on an semi agressive tune at around 20psi. Most of the the difference in the 2-3psi more with your setup is going to be more torque at peak spool and a higher egt. Just my .02 hope it steers you in the right direction.