OMG lets all flip out cuz we having nothing better to do during the day then to get on an online forum and try and prove that were cooler than all the rest of our online brethren. When either one of you can please show me a case of a car that has had detrimental effects on it because of a high duty cycle I will stfu, but until then dont you dare come on here like your hot **** and tell me to shut my mouth. If we were arguing this in real life you wouldnt have the ***** to tell me to "shut the **** up" so stop acting like your the coolest kid in the playground and talk like an adult. IDC DO NOT EQUAL A/F RATIOS and thats the bottom line. IDC's will NEVER **** up your car and stop letting people believe they will. Static is a term used to describe the condition of your injectors not the condition of your engine. You can have your injectors run static all the damn day long and if your car runs a 12.2 a/f with it then your all good. Just because you cant understand the concept of everything not being black and white doesnt mean you should make 9 threads a month going "2.8 and 42's cannot exist" and anyone that thinks they can is a demon. There is no black and white with tuning cars and everything is different, there are too many kids with HPTuners that shouldnt have access to it. You guys read something online, check your software and go OMG I need to inform the masses. An LSJ can run a 2.7" with 42's all day long up and down the block and at full boost and never loose fuel. Did I say in cold weather? did I say with some moron with HPTuners adding 900 degrees of timing? No, but with a GM tune and 2.7" your car can run like a champ all day long. Im sorry if you cant accept that but the fact that you cannot accept it makes you even more ignorant. But hey im glad you found a little friend to agree with you when the rest of the community thinks your an arrogant *****. Maybe you guys should go tune cars and get married...

 

1.) I never said IDC=AFR, you seem to think they have nothing to do with the other though. They are related, even if you choose to think they are not. You also admit this is your first forced induction car, so I doubt I, or others, are the ones lacking experience with FI cars, and their fuel systems.

2.) Im gad you know the definition of static. Looks like wikipedia helped you out there. Do you know what the consequences of running the injectors static are? This is what I, and CTC, and othes are trying to get across. The inejectors are being pushed beyond their limit. THEY WILL FAIL, deal with it.

If this were real life, I would still tell you to shut the **** up. Im not handing out mis-information, or trying to **** on your parade just for something to do. Im just trying to make sure other owners are running their car within safe parameters.

I don't care if you think im a *****, or arrogant, or whatever. Im just trying to give detailed accurate information.

 

Check my plugs every sunday and they are are always a golden brown color but thats not a correct indication of how your car behaves under WOT. The porcelain of your plug goes deep into the metal portion of your plug and the porcelain that is on the bottom is how your car behaves under WOT, the top of your plug is during cruising and light throttle. You can get a general idea but if you want to start diagnosing plugs your gonna need a spark plug light and a knowledge of how to diagnois a plug not saying hey theres white on the ground strip this plugs are too cold or the porcelain is white im running lean.

 

I dont need to have 9 f/i cars to have the experience. I'm not gonna start a pissing contest but I have enough very overqualified people to ask and bounce ideas off when I start getting gidding like you guys about IDC and whatnot. The difference is that when I ask someone that knows what they're talking about I go "ok, sounds good" but you guys go well this link I found on the internet and my spark plug gapper says different.

 

well if it main tained thats good. when i ran out of injector my a/f jumped from 11.3 to 12.8 like with in 800 rpms and would kept getting leaner hadn't the dyno pull stoped at 6450

 

you guys are worrying about the injectors going stactic and thats fine but honestly who has ever reported that happening on a cobalt with either injector?

 

Thats not your place. Each cars owner has to make the decisions that will be best for thier particular car. No 2 cars are the same and its the owners job to decide if they want to assume the ricks that come along with having a fast car. Those owners are normally the fastest btw.

 

Dont tell the tuning brothers that, they're gonna yell at you and throw datalogs up on the internet.

 

I know it exsists and can happen so before anyone goes postal i do know injectors can get stuck open just asking i havent seen any thread or post on it happening to someone with a cobalt .

 

Not choosing sides but this is a good stament right there. The End is opinion not fact but i still agree with it

 

Hey I'm here to discuss **** who ever wants to yell can yell. Its the internet can't get myself worked up over it. Last time i did the powers that be banned my favorite name.

 

OK it comes down to this.

You people can obviously do what you want.

What we are trying to tell people is a 2.8" pulley with 42lb. injectors makes your injectors run the risk of going static. Going static is not good. I hope everyone knows that.

This post is here to let everyone know that. So now they can make their own decision.

This isn't about personal attacks and my dick is bigger than yours. Come on.

I tried to help people but some people just don't want help.
We have people saying a 2.7 is OK but the IDCs are over 120%. I just don't get it.

Alpah, shut up, you sound like a kid and you are not helping anyone out. Post some freaking proof or get out.

All this crap from a guy who is running 60lb. injectors.
Aren't you the guy that had 122% IDCs? Yeah i'm going to take advice from you.

 

Likewise. I haven't heard of it happening on a cobalt, as of yet. Perhaps it never will, Im just saying it is possible. It CAN happen. (Looks like darksun, and im sure others can agree with that at least...)

I can't cite you a internet post, or documented evidence of injectors failing because they have went static. However, I know of individiauls it has happend to, and also a friend it happened to. He has/had a turbo II rx-7, new factory injectors. We were pushing the car to its limits fuel wise, but still withing safe AFRs. The duty cycle was at 110-112%, and an injector stuck open. Im not pulling **** off the internet, or definitions from it either. Im speaking from my experiences.

Yea, its just my word, my story, etc. However, I have seen it happen. It can, and most likely will happen at some point in time.

Yes, it isn't my place to enforce it. Im not trying to. I can, and will submit my findings though, and relay it to the community. Like I said, if you think Im an idiot thats fine. Your opinion of me matters to me, about as much as my opinion of you matters to yourself. Im just letting the community know that running an injector static can lead to injector failure, and then possible engine damage if the situation is not corrected.

 

Exactly^^^^

The funniest thing about this thread is that all the guys that say it's OK haven't showed a single bit of proof. Not one bit. Come on guys, lets see it.

I can see it now. They are going to say "you only have that one screen shot"

What do you guys have? Nothing.

Oh you guys must have forgot about the 2 people that chimed in and said the IDCs are too high. Lets just ignore all the facts and post up arguments with no back up......

 

The ONLY reason I went to 60's is because I wanted to rev to 7300. Thats the ONLY reason. My W/B was showing that the car was more than fine at 6900.

 

Whatever I'm done you two can get married. I dont feel a need to argue with ignorance anymore than I already have cuz your determined to prove your right.

 

hey at the end of the day its your car right, if nothing fails and your runnin a 2.8 with 42's until you get rid of the car, thats awesome, if something fails then you know where to start looking, my car runs safe, efficient, smooth, ands its a lil beast, and im on a 2.85 that had to have a bit of tunning to drop the IDCs to a safe level, lets keep the therad clean guys, deep down there is alot of misconcepton aswell as alot of good info, tis nto a battle of who knows more, im coming from a effin 2.2 ohv cavalier, i dotn run around thinkin i know tons, i dotn know **** compared to alot o you, but i do know i want the safest tune, quality parts and a strong daily driver.

 

Then prove me wrong Alpha, that's all I ask. You know you can't because your IDCs were freaking 122% w/2.7"

Alpha WTF is ignorant about IDCs being way too high with that pulley?

Nobody understands what you are arguing about.

Are you saying being above 90% is OK?

Are you saying a 2.8" pulley will not place your IDCs above 90% at 7,000rpm?

What are you saying?

 

Come on man... you know what happened to my stockers... bitch was stuck open...

 

Thank you Paul. Do you people still need more proof?

We have screen shots, we have members telling you that it's not safe with horror stories to back it up but not one bit of eveidence showing a 2.8 is OK with 42s.

Thanks for chiming in Paul. At least some of us care about helping people.

 

Alpha your stupid and not even talking about what CTCobaltsss is.

He is warning people the injectors can go static. He never said the car would not run with a 2.8 and 42#. It's safe but the risk of damage is greater then running lower IDC's.

I run a 2.8 and 42# from intense I wonder if these injectors can flow more. I have see where the fuel comes out of on the GM injectors and the Lucas ones and the oraphus(holes) are a lot bigger on the Lucas injectors then the GM Stage 2 ones.

 

I'm just glad to see all this info because when it is time for me to mod, I can make a more educated pick on what mods are safe and what are not. Modifiers beware!

 

ok just to let you know guys... I am running a 2.85 with 42's... if I keep my pe to 12.2 I see @90% idc but anyricher than that I hit 100+ over 7000 rpm now I don't know if my formula is correct for the 42's but it works for the 60's...
and also when it got cold with a commanded afr of 11.2 I hit over 85% idc....

 

Thank you sir! Much appreciated. I don't think the Intense injectors will flow more enough to make a difference. I would get it checked out.

Thanks man. That makes all this effort worth it. If we can help even save one guys car, it's worth it.

Exactly, don't go smaller than 2.85"

A 2.8" pulley and 42s is no good. Aspecially untuned. Thanks again Paul.

 

another thing... anyone know what fuel pressure the lucas' are rated to 42.5 lbs out... most are rated at 38-43 psi.. our fuel system is up in the realm of 56psi so I think they flow more... probably up @50lb.p.m. ... I think the gm stg II inj are rated 42lb at 56 psi so they might be going static at those rate... I still haven't heard anything on this theory but if anyone has some REAL info and not an opinion I"d like to hear it.