Billetflow 2.7" with 42lb injectors installed and tuned!
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From: OP, KS
Originally Posted by 06black
SOME of ya'll might not like this but it needs to be said.
the 43's with a 2.7 does work...works dam good to BUT!!!
pushing up to and past the 7k redline...in fact in the high 6k's the injecters pass 92% duty cycle wich is where they go "static"....they just stay open and dump fuel.
wich is noooo good.
also your af's creap past the 13:1 mark wich is the common "do not pass" AFR for safety sake.
I ran this set up for quite a while on my car even got it to a high 13/low 14 sec 1/4 mile with a very blown clutch but at traps in the 105-106 range. you have to be carefull about keeping the car at high revs due to the fact of them going staic and loseing all fuel control.
I have data loged the car with a tech2 and HPTuners MANY times on this set up so i can confirm all my statements.
long story short....it'll work just fine BUT please wach thouse revs for a some what exstended time and/or in hot weather where the AFR's lean out even more.
the 43's with a 2.7 does work...works dam good to BUT!!!
pushing up to and past the 7k redline...in fact in the high 6k's the injecters pass 92% duty cycle wich is where they go "static"....they just stay open and dump fuel.
wich is noooo good.
also your af's creap past the 13:1 mark wich is the common "do not pass" AFR for safety sake.
I ran this set up for quite a while on my car even got it to a high 13/low 14 sec 1/4 mile with a very blown clutch but at traps in the 105-106 range. you have to be carefull about keeping the car at high revs due to the fact of them going staic and loseing all fuel control.
I have data loged the car with a tech2 and HPTuners MANY times on this set up so i can confirm all my statements.
long story short....it'll work just fine BUT please wach thouse revs for a some what exstended time and/or in hot weather where the AFR's lean out even more.
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From: the glove
Originally Posted by patathSS
When have you ever run a 13???
SO HA!....not proud of that tho...
thank god the new clutch is in now....to the track i go!
hows it goin sence the move pat?
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From: OP, KS
Originally Posted by 06black
day before i did the swap to a 2.5....13.98 at 104
SO HA!....not proud of that tho...
thank god the new clutch is in now....to the track i go!
hows it goin sence the move pat?
SO HA!....not proud of that tho...
thank god the new clutch is in now....to the track i go!
hows it goin sence the move pat?
And glad to hear you made 13s. I bow down. hahaha
I don't know when I am going to the track next, I got kinda hosed on my work schedule and work Tue-Sat so I don't know when I will make it to the track next. I need to find a Sportsman class or T&T on Sunday somewhere.
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From: Maryland
Iam going to say it again, iam having no problems with the 42.5s in my car with my 2.7, i ran a 13.6 @ 105, traction limited, and have data loged the car with hp tuners, and everything is runing fine with the setup even at 7k.
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From: New York
Im thinking i would just be safe and go with a 2.8 or a 2.85 with the 42.5lbers. The duty cycle wouldnt reach anywhere near 120% with a 2.8/2.85 im thinking.... correcting me if im wrong... which i am probably lol.
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From: I don't know
Originally Posted by Waylin22
Im glad the 2.7 is working for you..and nice write up man! I do have one question though..why didnt you go with the 2.5 and the 60's...or the 2.7 and 60's instead ofhe 42's?
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From: the glove
Originally Posted by Shortbus
Iam going to say it again, iam having no problems with the 42.5s in my car with my 2.7, i ran a 13.6 @ 105, traction limited, and have data loged the car with hp tuners, and everything is runing fine with the setup even at 7k.
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From: I don't know
Also, running a pulley smaller than 2.6-2.7" with the engine spinning to 7,000rpm is actually taking a chance on having a problem with over-spinnning the blower itself. IMO, unless you are ready to break your car then stick with a pulley that doesn't require 60# injectors and machining of the snout. If you don't care then go crazy 
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From: Horseheads, NY
prob 2.4
I have 75%idc with 2.5 and 60lbers.
My buddies 06 ss/sc with injen, 2.9, and gmpp catback has idc's of 154% max lol...If u go on a WOT run u can feel the injectors seize shut at about 130 ish and the car just like feels like it hits a wall until the injectors cool down enough to spray again.
Dan
I have 75%idc with 2.5 and 60lbers.
My buddies 06 ss/sc with injen, 2.9, and gmpp catback has idc's of 154% max lol...If u go on a WOT run u can feel the injectors seize shut at about 130 ish and the car just like feels like it hits a wall until the injectors cool down enough to spray again.
Dan
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From: I don't know
Update on SS
I installed the Dynomax Ultra Flow polished stainless steel muffler in the stock catback. Part# 17287 with a 2-1/4" in and out, and then the stock tip was welded back on. It looks and sounds great, and the car picked up some power with the swap. Next I added the K&N Typhhon intake and let me tell you the car picked up quite a bit over the airbox modification. The blower whine is insane now and I also picked up about 1 more psi boost from the swap - running about 18.5psi now. I'm anticipating about 260whp once I retune the car. I may get the blower and throttle body ported before that though, as I'm trying to get to 20psi before I stop. Something about pegging the boost guage seems just right
Stay tuned for pics and sound clips
Stay tuned for pics and sound clips
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From: Central IL
so for those who are running 2.7 with 42.5's what is your duty cycle logging in at? I know everyone for the most part is saying its ok, but from what I am reading is that once it hits 100% its up to the ecu/fuel system to keep pumping fuel which is closer to failure correct me if I am wrong, right now I am contiplating from 2.8-2.7 i currently have a gm stage 2. To me i guess it is not worth 92% example if the cycle is maxed at 100% just there is not a whole lot of room for error i guess.
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From: Ottawa, Canada
Originally Posted by blown06
so for those who are running 2.7 with 42.5's what is your duty cycle logging in at? I know everyone for the most part is saying its ok, but from what I am reading is that once it hits 100% its up to the ecu/fuel system to keep pumping fuel which is closer to failure correct me if I am wrong, right now I am contiplating from 2.8-2.7 i currently have a gm stage 2. To me i guess it is not worth 92% example if the cycle is maxed at 100% just there is not a whole lot of room for error i guess.
It really all depends on how much boost you are really running!! Doesnt matter if its a 2.6 or 3.0 pulley, some people get more boost then others. I for example am running a 2.6 pulley limited to 17PSI with a boost controller.
42# Injectors and 17PSI is safe.
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From: Central IL
Originally Posted by denny
It really all depends on how much boost you are really running!! Doesnt matter if its a 2.6 or 3.0 pulley, some people get more boost then others. I for example am running a 2.6 pulley limited to 17PSI with a boost controller.
42# Injectors and 17PSI is safe.
42# Injectors and 17PSI is safe.
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From: Ottawa, Canada
Originally Posted by blown06
curioustity how do get the boost controler to work on the sc
8) The VOODOO boost controller: This thought was brought to us by member JMC007. Why use a boost controller that was built for turbo cars? Well in a supercharged application like ours, it works in controlling the amount of boost and not increasing it. Let me explain further: By changing to a smaller pulley you increase the range of boost from 11 PSI to 20+ PSI. Example: With a 2.6 inch pulley, I can boost to 20 PSI + on a cold day, which is too much for my supporting mods right now. I still want to keep all that low end torque that comes in very early with the 2.6 inch pulley. So that is when the boost controller comes in handy, and limits the boost at the level you want. I set it to a safe 17 PSI. Why? Because, I am only running 42# Injectors right now. If I want to increase boost and stay on the safe side, I am going to need more fuel.
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From: I don't know
Remember that not all 42's flow the same - even though they are supposed to. I think my Ford SVO green tops will be good to 20psi which I should be running after I port the throttle body & blower. Right now, they are holding the A/F ratio below 12.0:1 all the way to 7,000 at approximately 18psi. Power wise they are tapped out at about 275whp, so you can't go just by boost. You can make more power with less boost depending on your setup 
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From: the glove
you also must keep inmind that if you go else where for injecters flow rate means JACK **** if you dont look at what fuel PSI they run at...an injecter thats rated at 40lb at 40psi VS a 40lb injecter at 60psi....
even tho there the same fuel rate the injecter thats rated at 40lb with flow more on our car cuz our rails are 60psi...
but you run the risk of over pressureizeing the injecter and then blowing it....then POP goes the motor
even tho there the same fuel rate the injecter thats rated at 40lb with flow more on our car cuz our rails are 60psi...
but you run the risk of over pressureizeing the injecter and then blowing it....then POP goes the motor
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From: Ottawa, Canada
Originally Posted by blown06
So anyone logged the duty cycle, or should I just the hell with the 2.7 and go 2.8, or do the 2.7 and just do a boost controler and set it at 18-19
In the future maybe get bigger injectors and control the boost at 19-20 PSI.
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From: Central IL
sounds good then, last question does the 2.6 max the rpm on the charger at wot? I think in this post I read 16000 is max and the 2.7 will push it at 15,555. Sorry I want more power i just dont want a $100 invest turn out to be a $1000 problem
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From: cincinnati, ohio
ethanol?
( The bad news is that it was like 105 degrees here today, and we have that terrible ethanol gas here in the Dallas/Fort Worth area that seems to be moree detonation prone in this heat.)
you use e-85?
you use e-85?