you read right
the stock injectors were pushing 105% duty cycle at 6600rpm and up to shift point so I've had to upgrade the stock 252cc to ford green top 440cc
the reason I used the 440cc is because I had them ready to go for when I boosted the car, but figured I'd use them since I needed larger injectors and had them.
the car, after some minor drivability issues is running very good on the 440s right now. I have yet to tune for high RPM since I have about 300miles to go to break in my patriot head, but every generation of tune the car gets smoother and behaves more stock. I'm amazed at how well the car runs with such a large injector even though its still n/a
now my fuel curve is going to stay where I want it (13.0:1 but I may lean out to 13.5/ 13.7:1) the car is going to be able to better utilize the newfound top end with the ported head, oversized valves and cams.. and should be significantly faster than it was before since I've not only increase breathing ability, but I've also put in injectors that won't clip in the top end
I'll be posting up my HPT file for this stuff soon if anyone wants to take a look. I'm going to be tuning more of my low RPM maps today after work (I had a nasty misfire and some really lean/ rich cells down there).
High RPM will be tuned VERY soon.
Skwirl's tip of the day:
if you're n/a ecotec tuning your air/fuel ratio for richer than 14.0:1 (what mine was stock after hooking up my wideband) you're going to see duty cycle go off the charts. larger injectors is an important mod even for an eco with mild bolt ons, it seems stock duty cycle is already at the critcial 80% if not slightly higher.
thanks for the updates bro. this is really going to help a lot of us n/a tuners. I can't wait to get my Eco in and pick up HPT now.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
I'd be willing to bet that Z24 guys spinning higher than stock RPM will see the same problems. you could up fuel pressure, but larger injectors is probably the best way to go about it.
eh... my Cav won't be a Z24 much longer. more of an LS Sport with Z24 badging... or it's getting it's Canadian citizenship.
I had read a post a few weeks ago saying that your injector duty cycles were really high from tuning, so I was already looking at getting larger injectors for it. I was gonna go ahead and try to tune the Eco that I'm putting in as it sits with bare bolt ons (intake, header, exhaust), and see what I could do with larger injectors, but I think I might wait a bit to see how your tuning comes out.
when are you gonna get that thing on a dyno?
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
next year sometime
plus, by then it may not be n/a anymore i'm not sure yet.
time will tell
keep us updated. I would like to see how well your N/A tuning efforts come out, but I can understand the need (want... LOL) to go boosted.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
good luck peej... I wanna ride in this thing NA I bet it pulls nice....
LE61T PTE6262 Powered
i've only gotten to feel the powah from 4500-6000 rpm or so, and it definitely takes off.... lets see how long he can wait before he hits 7500, lord knows he hit 6500 already 40 miles or so into the break-in........ (rolls eyes)
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
I got one for ya... I'm runnin a Walbro 255 w/ the stock injectors and FPR. My car was ok for about a day, then it started stumbling.. and it got worse and worse until finally, it wont run at all. A couple of friends (one bein a J member) told me my FPR is just too weak to handle the overabundance of fuel I'm getting now.. any suggesstions? BTW, I'm sure I've fouled my plugs, so I dont need that tidbit of info... if any suggesstions point to an adjustable FPR, where can I get one? And not a universal...
R.I.P. JessE Gerard 7.11.87 - 1.25.08
The Radiation Nation Facebook Twitter Twisted Metal Alliance
I like your posts. It always helps me out and you are basically the only one tunning an N/A eco that actually post his findings. Ive found my injector duty to hit +80%. Maybe you could post vids of the dash and the redline later on when your satisfied with you tune.
Evan Stryker wrote:
I got one for ya... I'm runnin a Walbro 255 w/ the stock injectors and FPR. My car was ok for about a day, then it started stumbling.. and it got worse and worse until finally, it wont run at all. A couple of friends (one bein a J member) told me my FPR is just too weak to handle the overabundance of fuel I'm getting now.. any suggesstions? BTW, I'm sure I've fouled my plugs, so I dont need that tidbit of info... if any suggesstions point to an adjustable FPR, where can I get one? And not a universal...
any AFPR for the chevy LT1 from jegs or summit will fit the ecotec fuel rail. The Accel AFPR looks almost stock (save for the adjustment screw) and is no bigger than the stock FPR. There's another one made by Aeromotive that has a few more features as far as running a custom fuel setup with -AN lines, but is pretty pronounced in its presence (bright red and black anodized finish and fairly large). Pretty sure both are adjustable from 35psi - 75psi fuel pressure.
As far as your problem is concerned, I'd be checking out that pump if I were you.
Enthusiast wrote:
I like your posts. It always helps me out and you are basically the only one tunning an N/A eco that actually post his findings. Ive found my injector duty to hit +80%. Maybe you could post vids of the dash and the redline later on when your satisfied with you tune.
Anything to help the n/a guys
I'll be making the same contribution during the turbo project as well, but I promise you my car will end up running right when its done
I'm almost satisfied with wide open throttle, drivability in some spots at partial throttle is another story.. but its getting better. when I get the fuel dialed in (i may lean it out a bit) and mess with spark advance I'll have a short video and I'll rev it out to 7300 >=)
traction from a dig is starting to become a real hassle.
PJ, not to thread jack, but weren't you looking at putting F35 parts into an F23 case at one time?
I've got an F23 from an Ion that won't swap over to the J because of the mount points. I'm almost wondering if I should keep it for parts for a trans build.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
they both come with the quaiffe LSD (the F23 you have to install yourself however)
I was looking to straight up swap an F35 into the Jbody, but I don't think it'll fit at all.
I gave up on that idea.. F23 FTW
almost forgot...
I found this AFPR setup the other day:
http://www.smgmotoring.com/products/53
I'm going to try and get more info on it, but I think this might be one of my upgrades in the future.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
yeah, I highly doubt the F23 I have has an LSD in it. oh well... I might still keep it, tear it apart, and go get the gears cryo treated.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
you can get the same one from jegs or summit..
any LT1 FPR will fit the ecotec fuel rail
What about the fuel pump should I be checking? It works and all, it just seems too big for my FPR to handle... we changed out the plugs and ignition module today, and it starts and runs 10 times better than before (save for a hiccup at low rpm if you punch it??). We're just wondering how long it'll before the same problem happens again... basically, we need to find an AFPR that'll actually go backward and turn down the fuel rather than increase it.
R.I.P. JessE Gerard 7.11.87 - 1.25.08
The Radiation Nation Facebook Twitter Twisted Metal Alliance
I hit 111% at 80PSI line pressure, swapped in 30#s, now at around 100% and still lean... now gimme yer injectors PJ!
^^ its called money. use some =P
i have a spare set of 252cc for sale tho. run two injectors in each runner
Evan Stryker wrote:What about the fuel pump should I be checking? It works and all, it just seems too big for my FPR to handle... we changed out the plugs and ignition module today, and it starts and runs 10 times better than before (save for a hiccup at low rpm if you punch it??). We're just wondering how long it'll before the same problem happens again... basically, we need to find an AFPR that'll actually go backward and turn down the fuel rather than increase it.
Do you have a fuel pressure gauge or a wideband air/fuel ratio gauge?
if not, you shouldn't be messing with fuel... period. Its a big no-no to mess with stuff you can't monitor if you like your car running right.
it sounds to me like you're just using too much fuel. your old plugs probably got fouled.
AFPRs do decrease fuel, hence the A.. which stands for Adjustable.
Idling is idling for an engine, whether it has a turbo hanging on it or not. But yes it can run very well on 440cc injectors.
O noes!
DaFlyinSkwirl (PJ) - BPU++ wrote:they both come with the quaiffe LSD (the F23 you have to install yourself however)
The SS/Redline F35 has an optional LSD package from the factory, the F23 does not. Any F23 LSD would be aftermarket (I know, the F35 LSD is made by Quaife, and Quaife also has a F23 LSD available) Your not going to find a F23 with a LSD from the factory.
F23 parts are interchangable with other F23's....... nothing from the F35 will fit into the F23 trans. (not 100% sure if you can pull the gear clusters off the shafts and swap them, but leaning towards you cant)
SPD RCR Z -
'02 Z24 420whp
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'04 GTO 305whp
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