jonnymerk

I don't get the duty cycle sometimes lol. Im on 72's and at 18psi Im only at about 40% duty cycle.

BlkWdoSS

iTrader: (7)

If you are going to run the 60s without a rising fuel pressure rate (like a BRFPS), the Hahn turbo will overrun your fueling. I dont think you quite understand fuel systems. Almost EVERYONE in this thread is running some kind of updated fuel system. We arent just doing it for fun, there are reasons for that. Its not because someone gave us all the wrong information and we all took it.

If you are going to run 80s or bigger it would be wise to use a system where you can adjust fuel pressure down so that it seriously helps idle.

Axelthered05

iTrader: (9)

^this^ im not even running all that much power compared to most of the guys in this thread but even I utalize a BRFPS and a return style

SuperChargedMA

iTrader: (2)

I don't know if I've been misinformed, but when I was about to purchase my turbo kit from zzp I spoke to them a lot about my concerns and everything. Im running the s252et btw. I asked about the brfps and 80's. They told me unless I'm planning on running e85 that its just not necessary and all I need are 60's for now. So that is what I went with.

BLAZIN07SS

iTrader: (7)

because you can get away with the stock fuel system and 60's. when you go on 80's, it's wise to drop the pressure at idle

SuperChargedMA

iTrader: (2)

Does anyone know how to fix the shitty idle issue? Everything is clean so that's not the issue. I'm assuming its with the tune, which I'm getting re-tuned Saturday, but any advice from anyone in here just in case he has trouble fixing it?

SCcobaltSS

iTrader: (2)

Explain idle issue

c130aviator

iTrader: (8)

I think I have a good grasp on why you use the BRFPS. At 80lb injectors idle is crap because you are flowing too much and the fuel rail pressure being lowered helps fix that.

I just said in my last post on the previous page that I will grow into it when I grow into my mods. Look at the quote below. SuperchargedMA was told the same thing Hahn and the PO of my turbo kit told me. Unless 80's its not needed.

I was told the same by Hahn and Turbo Kit PO.

When you go 80's I believe they are hard to tune for since they are flowing more fuel. Dropping fuel rail pressure fixes or bandages the problem.

SCcobaltSS

iTrader: (2)

I dont know his mods so I am not sure what the idle issue is.

80's arent that tough to tune. Yes you get pops here and there from misfire but I can usually get the car not to surge with 80's.

Dropping the fuel rail pressure with a boost reference FP regulator IS a fix not a bandage. Better idle due to the drop and higher injector ceiling up top. (If the rise brings you over stock FP)

jonnymerk

Yes I agree. You can get away with 60's or 72's or 80's like some. If you are running higher boost tho the upgraded fuel systems not only make it easier and safer but become essential. My tuner worked mostly on stangs and even he noted the benefit and need for it in the future with my car.

c130aviator

iTrader: (8)

My bad, I thought you were asking me.

SCcobaltSS

iTrader: (2)

oh.. no no. I was asking what SuperchargedMA's current idle issue was.

SuperChargedMA

iTrader: (2)

S252et kit from ZZP. 3" exhaust, I'm on 60's. External dump,just switched to tial bov. Boost controller. I think that's it from that stuff. But the idle is just hunting. Sometimes its okay but other times it goes from 500-1200 rpms and has stalled out a few times. Its pretty rough.

rivaladore

iTrader: (7)

Same setup as you but I'm on stock exhaust and my idle sucks too. Sometimes it's fine and sometimes it's not. When it does act up the rpms will still stay pretty steady but you can hear the engine like surging as if there is a vac leak. Car will stall out with the AC on and sometimes if the fans are on. I can get the car to idle with the AC on if I'm parked and I blip the throttle for a second or two, but if I start driving and come to a stop the car will stall if the AC is still on. Gremlin85 is coming down in September and I'm getting retuned hopefully he'll do a better job. Gave up on trying to get another appointment confirmed with BYT so he can make some revisions.

BlkWdoSS

iTrader: (7)

When was the last time either of you changed your fuel filters? Where is your Maf located? have you checked for vacuum leaks? a log of you car would help every one here with your problem. Idle hunt can be tons of different things.

rivaladore

iTrader: (7)

Changed my fuel filter last year. Maf is located exactly where zzp has it, after the intercooler and before the throttle body. I checked for vac leaks. Damit i really need to buy hp tuners, in the meantime I'm waiting till September when gremlin85 can tune me.

One thing i noticed is everyonce in a while my car will idle super smooth, I'll think to myself damn did my car turn off, then I look at my wideband and the a/f is reading around 12.5-13, then 10 seconds later the car will go back to bouncing around stoic and idling like poo.

BlkWdoSS

iTrader: (7)

check for exhaust leaks and change your fuel filter, I change mine every 8-10months, tends to help significantly.

mexi_loco

iTrader: (7)

do you have to buy a different fuel filter than OEM if you're rocking an rsfs? just wondering b/c i want to go ahead and change mine when the time comes.

BLAZIN07SS

iTrader: (7)

Yeah it's different.

If you don't want to buy a $45 "custom" fuel filter from Ott, you can just get a Fram #ff648 and press the bracket flat.

ItalianJoe1

iTrader: (10)

SSHHHH!!!!

I thought we were gonna sell them for like $35 and split the profits!

BlkWdoSS

iTrader: (7)

you can reuse the stock bracket... it fits perfectly on that filter.

rivaladore

iTrader: (7)

Thanks for the advice. Gonna jack my car up tomorrow if I have time and check for exhaust leaks. I think I might have a leak where my dp and catback meet up, don't know if that would cause an idle issue. Pretty sure it wouldn't be before that bc i already re-torqued the turbo manifold after a few hundred miles of installing the turbo kit. I don't hear a leak at idle, but if I'm on the highway just cruising next to a concrete divider I can hear a buzzing type sound, but if I'm on a regular open road I don't hear anything. Besides that I can't hear crap bc my open dump is so frigging loud.

BlkWdoSS

iTrader: (7)

where is the rest of your exhaust? lol easier to monitor your car with a quiet exhaust lol

rivaladore

iTrader: (7)

The exhaust is on there. Just saying when I get on it I wouldn't be able to hear any leaks bc the open dump is loud

c130aviator

iTrader: (8)

Gapped my BKR7E plugs to .032 On the gauge I just made sure the center of the plug was between .031 and .033, and used anti-seize.



Installed my LNF (ss turbo) alternator and bolts. My stock welded unit is for sale with the long bolts if anyone wants them.



Installed and adjusted my Ingalls Dampener I bought from a guy on here for 50 bucks, which by the way doesnt look like its going to work with my hahn turbo intake. What did you hahn guys do if you have the ingalls installed?



Hahn Ceramic Log manifold installed.




I should have my high pressure oil fittings and nuts from Hahn tomorrow. Then I may actually be able to fire up the car after 3 weeks of it sitting. I did have chevycobaltss3 go over my htp tuners file. I am going to have him follow up after I log some time in the car.