I thought a 3" maf could handle quite a bit more than that?

 

When you start to max the voltage out on the maf, you run out of room for the ECU to know what is going on.

 

So did I. I have 3 inch blow through on mine. Hope it's not going to be an issue with the GT3582R HTA

 

Can't u just tune your maf then? What's the max voltage it send to the ecu?

 

You guys are awesome. It's nice to have a community with knowledgeable and friendly people. Hats off to all of you!

Thanks Hollywood for taking the time to put this together and share with the people.

 

+1. On my evo8 I ran the stock injectors out to 129% making ~360whp on a dyno dynamics with a 1mm alky jet augmenting them. 100% is a CALCULATED number, the actual physical limit of the injectors doesn't always line up with the 100% number that's calculated based on the pulsewidth and scaling.

The problem is, when you hit that limit, it is rarely at the highest rpm you're going to run, and the AFR simply leans out aggressively and linearly from there on up. Widebands and tuning to a nice safe peak IDC keeps this from happening.

 

No offense, but you gotta loose this attitude. Some simple research will prove the above is true. Not much progress can be made with making the ecu better/more accessible if people are demanding trivial information of the highest of high ecu gurus. Please try researching yourself, then asking the COMMUNITY, not just one guy Tephra's busy enough as it is!

 

haha losing what attitude? no offense but there is a lot of bad information from people in the forums as it is. not saying that golden is one of these, but there are plenty of people in here, including moderators, that think they know a lot. so i'm sorry for trying to get a straight answer from one of the few people that I KNOW they are trust worthy. your post would have been deserved if i would have kept asking and asking and asking tephra to answer or bumping the thread until he did. but last time i checked i only asked once. please don't come at me like that. however, thanks for your personal example of IDC.

 

I just finished installing my 1300's and I am trying to set my scaling in ecu flash but I can not get it to go above 770, what do change in order to get it to allow over 770?

 

Hit equals and the number you want the scaling set to...

 

Got it thank you very much!

Hollywood i was looking through your latencies versus what i have on my sheet from deatchswerks, they differ quite a lot. How did you come by you numbers?

 

Disregard my last question I getting very close to your numbers, I'll post my numbers up hopefully tomorrow.

 

Lots of driving and tweaking to get my numbers.
Also my numbers will be off from yours is the MAF scaling isn't correct.

 

Remember that your fuel pressure raises 1psi for every 1 psi of boost... so at 30psi you are running 73.5 psi of fuel pressure, and the flow of that 255 drops significantly. I believe that the walboro is rater for 255 at 30psi, but that may be incorrect. See the AMS fuel pump test for actual flow.

At actual duty cycles above 93-95% (but depending on latency) most injectors are basically static... that means that you are not controllably injecting fuel, you are just dumping what they've got. These modified bosch low z injectors are usually pretty good and have low latency, however there is no good reason to approach loss of fuel control at those load/boost/power/detonation threshold levels.

The PTE 780cc injectors I had running at ~110% logged dc on my IX were *usually* OK, but every once in a while AFR would get pretty erratic. You wouldn't want to be hitting a boost spike or cold air or anything to push you over the edge in that situation, so just up-size your injectors... it is better than nothing even if your fuel pump can't support the extra 300cc per injector.


The attitude is that Tephra doesn't belong to you or have any obligation to find out anything for you... or frankly anyone else here. Appreciate what he does for you, and don't be a jerk.

It helps alot when you bring valid options and discussion points to a question, rather than just saying "I need and deserve halp! Do the reading for me".

If you don't understand where people have already gone wrong, you may not really understand how to go right.

 

Yes I do understand this pretty well and the AMS chart you speak of shows the same Walbro F20000 255 LPH-HP pump I'm using flowing 290lph @ 40psi & 231lph @ 70psi. Your thinking more of the stock Evo X pump.