@98montecarloz34 Although I agree to check, its possible that your set-u is very good. Technically pressure in the manifold is bad, you would much rather have a low psi due to free flowing air through intake and exhaust. This also changes dramatically depending on alt.
2.8 pulley system??.. terrible.. i was running like 2.8 inch i think with the gm stage 2 set up and I was boostin like 17-18psi and pushing easily running 93 octane 155 hp... ur barley gettin it up to 15psi at max rpm... if ur gonna upgrade the engine.. i would stick with gm made parts and programming.. it will save u problems and add more hp!
once again this cant be a 2.8 pulley on the car its to slow on the pick up,i have a 3.0 pulley on mine and a few little mods no internals and i run 18psi and put down 272 at the wheels..so go to zzp and but there kit and tune its better then any other kit
I'm pretty sure mine is a 3" and i push 17 lbs, that's stock exaust stage 2 with cai, i could be wrong though the the only mod i have done is the cai, stage 2 was on it when i got it
2.8 pulley should be at least 16lbs with any exhaust unless your running straight outta the fuckin side of the motor, only valves and cams will help you release any more pressure....
Just bcuz u have a bigger engine doesn't u have better performance. Evo 8 is a beast, Srt-4 wit a stage 2 is hell 2 fuck wit, and a cobalt ss wit a stage 2 or 3 will kill our heavy ass engine without a problem! Trust me I've done it
My main point is a v6 will beat a I4. This is a 4 speed too unless it's a manual. I like this car and how it looks but I just don't do I4. If you want to go fast v6 and v8 mainly v8 though but i like v6 because it's easier on gas and weighs a bit less. I'm sure weight difference isn't much but don't bash me because I don't know approximately how much it weighs.
The GP GTP would pull a Cobalt SS off the line and get passed up on the top end. The GP weighs about 400 lbs more and has a 3 speed auto with overdrive. the SS has a 5 speed manual.
@lurch1489 Well weight doesn't matter if the guy in the GP GTP had a pulley, and intake it would be over and that's all he would need but stock vs. stock gp gtp wins. I'm pretty sure it's 4 speed with overdrive.
in a 1/4 mile race the GTP should win but from a high roll the SS would win. The 3.8 S/C makes great low end power but runs out of breath up top and basically the SS is the opposite, making its power up top.
The reason I brought up the weight and trans was to explain why it would be a close race. BTW the GTP's trans is a 3 speed with OD being the fourth gear.
Most GTPs have KR in stock form so dropping pulley sizes with only an intake is not wise and would actually make the car slower.
now, just to clear some more stuff up, I am also strictly talking about the Supercharged SS and not the newer turbocharged SS. the TC/SS runs high 13s stock and with just a tune can put down just about 300 WHP and 330 ft/lbs...
nooooot really. depends on how close to sea level youre at. ive seen stock ss s/c barely touch 9psi. over the winter after i installed my intake and plugs, ill hit 17. it was also 14 degrees out so the air going in was thick and cold.
PSI has nothing to do with anything... and your trying to compare a turbocharger to a positive displacement supercharger with boost... and you have built plenty of engines right.... Comparing boost to boost is by far something a noob would do... boost is relative, there are so many variables to go along with it its not even funny...
or your just retarded and have no idea what you are trying to talk about. Sense you cant explain what you are even trying to say. Like i said before you really do not know what you are trying to talk about period!
Fueling is more important then spark and spark is more important than boost, noob.
If the fueling is all jacked up you cannot tune for spark advance/retard. Boost and spark are directly proportional in regards to what boost level you can run. Less timing, more boost. More timing, less boost. And this is of course if the fueling is tuned properly.
lol nice words... just a little on the vag side... by spark you mean timing? All the spark does is heat up the temperature to its auto ignition point. Boost doesnt really have a whole lot to do with timing its more of knocking and pinging... And AFR has to be richer than stoich other wise you really wont go anywhere... thats just common sense..
"spark" is when there is enough potential difference between positive and negative ions to ionize the air and fuel between the spark plug gap. Timing is always measured advanced or retard from TDC. I don't think I am the one who is a noob. :)
"Spark" is auto slang for timing advance/retard lol
I know how spark plug works...that is not even what I was referring to. I thought I could be more laid back with you because you seem like a car guy and use a few slang terms, but I guess you need the more anal reasoning lol
Sorry the term "spark" usually refers to the actually seeing of the electrons moving after ionization occurs. If you really want to we can get into primary coil current ramps, secondary ionization voltages, spark kv, burn time.... ect.. But I am sure sense I am the noob all of that would be a cake walk for you to understand.
Way to list "advanced" terms lol You must really know what you are talking about...
I tuned my car on E85 all by myself... You have to consider a HELL of a lot more than that to fully tune for E85. If I gave you a tuner, you would choke after you see the complexity of tuning for SA/R Tables, IFR vs MAP Tables, GST, BST, IAT vs SA, MAF Mhz tables...and making changes according to the AFR...you wouldn't have the slightest idea what to do... :)
dude are you seriously retarded? I told you was "spark" is... you need to used correct terms.. your referring to ignition timing for like the 4th time. Spark a whole different thing... You so retarded you didnt even catch that i was correcting you...
If a spark plug doesn't provide a spark to raise the temperature to raise it to its auto ignition point then what does? hmmm must run like a diesel...
And for the record, I do all my own tuning on my car, and many of my friends (LS1 Formula, SRT4,etc) cars.
If you really think I don't know what I am talking about, then you need to relearn how a car operates, because I really don't think you even know how a car works.
Lol I can clearly tell you have no idea how a supercharger works...
Mods affect boost levels. Exhaust mods and intake mods REALLY affect boost levels. The more air you can get out of the engine (exhaust mods) the less boost the blower will create on any given pulley.
Oh and 18 PSI on a 2.9, sounds like you're boost stacking to me ;)
@lurch1489 No man thatsd not right. The more air exiting (with exhaust mod) the more air is entering and you boost more. Trust me man i got a CAI and highflow cat dp and headers and my boost went up about 2 psi.
@lurch1489 do you even know where the pressure sensor for the boost is located? cuz it doesn't sound like you know much about this car or any type of boosted car for that matter.
@bettermaxim not specifically on this motor, but my guess would be the lower intake manifold.
Now, if the Cobalt's intake is super restictive, I could see you gaining boost. However, you are not going to gain boost by going from the stock manifold to a header. Boost is a measure of pressure that is being built up in the motor. If an exhaust manifold is restrictive enough, then not all of the pressure will be relieved in the exhaust cycle and "create" more boost, also known as boost stacking.
no i'm not.. i'm gonna set the boost to max 18psi which is the safe zone for the SC and intake.. with the meth injection and dual pass end plate.. not going to hurt it at all.. even if i decide to set it to 20psi.. i', still gonna be safe
Thats it.
charlieecv 5 months ago
15 psi on a 2.8??? check for boost leaks cause my 2.8 is 17-18psi, mine had one, bad intake gasket
98montecarloz34 6 months ago
@98montecarloz34 Although I agree to check, its possible that your set-u is very good. Technically pressure in the manifold is bad, you would much rather have a low psi due to free flowing air through intake and exhaust. This also changes dramatically depending on alt.
bratboy90 4 months ago
2.8 pulley system??.. terrible.. i was running like 2.8 inch i think with the gm stage 2 set up and I was boostin like 17-18psi and pushing easily running 93 octane 155 hp... ur barley gettin it up to 15psi at max rpm... if ur gonna upgrade the engine.. i would stick with gm made parts and programming.. it will save u problems and add more hp!
Dailey24 7 months ago
@ViViDxVIKING I wouldn't have been surprised if you were serious with the way some people are on youtube now a days.
TheFreakINcontrol 7 months ago
Good shit man. Injectors I assume? Not safe to run a 2.8 without upgraded injectors. Safe would be the 60#
bratboy90 7 months ago
@ViViDxVIKING I hope that is sarcasm you are using, this is on a dyno.
TheFreakINcontrol 8 months ago
SEAT BELT MOTHAFUKA
ohyes247 9 months ago
ya dude i have a 2.8 and its ~17-18psi, 15psi is a stage two 3.0, which i also had at one point.
98montecarloz34 9 months ago
15lbs of boost. gotta be a GM Stage 2...good shit.
Ferrari360Spyder 1 year ago
that's pretty much the power gain you'd get of GM stage 2. haha. Go ZZP man.
importhater56401 1 year ago
once again this cant be a 2.8 pulley on the car its to slow on the pick up,i have a 3.0 pulley on mine and a few little mods no internals and i run 18psi and put down 272 at the wheels..so go to zzp and but there kit and tune its better then any other kit
89Jsharp 1 year ago
what size injectors you running?
Mr07sscobalt 1 year ago
I'm pretty sure mine is a 3" and i push 17 lbs, that's stock exaust stage 2 with cai, i could be wrong though the the only mod i have done is the cai, stage 2 was on it when i got it
kassid81 1 year ago
Comment removed
silvajason123 1 year ago
2.8 pulley should be at least 16lbs with any exhaust unless your running straight outta the fuckin side of the motor, only valves and cams will help you release any more pressure....
GSXEclipseT62 2 years ago
if anything, the header and downpipe will make you drop 1 or 2 psi...
lurch1489 2 years ago
@lurch1489 so why fix an ss if ur going to make it slower??? just leave it stock lol
casimiro56 1 year ago
He didn't have his seatbelt on.
UltraJoosh 2 years ago 2
Just bcuz u have a bigger engine doesn't u have better performance. Evo 8 is a beast, Srt-4 wit a stage 2 is hell 2 fuck wit, and a cobalt ss wit a stage 2 or 3 will kill our heavy ass engine without a problem! Trust me I've done it
Lilcrawler22 2 years ago
a gp gpt can beat it with a supercharger in a 3.8 v6
tytig94 2 years ago
Nope try again... Gp GTP are nice and all but would need a pulley and headers to keep up.
DOHCCordia 2 years ago
How, this 2.8 gtp 3.8 Bigger engine more performance
tytig94 2 years ago
GTP also = heavier with a 4 speed auto.
DOHCCordia 2 years ago
My main point is a v6 will beat a I4. This is a 4 speed too unless it's a manual. I like this car and how it looks but I just don't do I4. If you want to go fast v6 and v8 mainly v8 though but i like v6 because it's easier on gas and weighs a bit less. I'm sure weight difference isn't much but don't bash me because I don't know approximately how much it weighs.
tytig94 2 years ago
The GP GTP would pull a Cobalt SS off the line and get passed up on the top end. The GP weighs about 400 lbs more and has a 3 speed auto with overdrive. the SS has a 5 speed manual.
lurch1489 2 years ago
@lurch1489 Well weight doesn't matter if the guy in the GP GTP had a pulley, and intake it would be over and that's all he would need but stock vs. stock gp gtp wins. I'm pretty sure it's 4 speed with overdrive.
tytig94 2 years ago
in a 1/4 mile race the GTP should win but from a high roll the SS would win. The 3.8 S/C makes great low end power but runs out of breath up top and basically the SS is the opposite, making its power up top.
The reason I brought up the weight and trans was to explain why it would be a close race. BTW the GTP's trans is a 3 speed with OD being the fourth gear.
Most GTPs have KR in stock form so dropping pulley sizes with only an intake is not wise and would actually make the car slower.
lurch1489 2 years ago
@lurch1489 Just putting my point out there that if you spend the same amount on the gp as you did on the Cobalt the gp will win. Either way GM wins.
tytig94 2 years ago
now, just to clear some more stuff up, I am also strictly talking about the Supercharged SS and not the newer turbocharged SS. the TC/SS runs high 13s stock and with just a tune can put down just about 300 WHP and 330 ft/lbs...
lurch1489 2 years ago
nooooot really. depends on how close to sea level youre at. ive seen stock ss s/c barely touch 9psi. over the winter after i installed my intake and plugs, ill hit 17. it was also 14 degrees out so the air going in was thick and cold.
jimmytango 2 years ago
i call BS on stage 5... 15psi? i hit 15 with a stock pulley...
jimmytango 3 years ago
hows that? every other cobalt ss/sc hits 12.5 stock...
aajaro 2 years ago
Ecotec's just don't make that much power because the perasitic loss from a roots blower on a small displacement 4 cylinder is huge.
That's why the turbocharged ones are a WAY better car. 0% perasitic loss. But I wouldn't expect you to understand...
3800GTV6 3 years ago
And believe me, 196 wheel torque on a motor that is pushing OVER 14 PSI is SAD!!!
Hell my buddies turbo S10 pickup truck made 210 ft lbs on 7 PSI!
3800GTV6 3 years ago
ur retard... boost is relative! NOOB!!!!
ls1maro99 3 years ago
Noob???
Haha I've built more boosted motors then you could count jackass...
3800GTV6 3 years ago
PSI has nothing to do with anything... and your trying to compare a turbocharger to a positive displacement supercharger with boost... and you have built plenty of engines right.... Comparing boost to boost is by far something a noob would do... boost is relative, there are so many variables to go along with it its not even funny...
ls1maro99 3 years ago
Wow way to state the obvious my friend! I never said boost isn't relative dooood....
I work on cars for a living. I think it is so funny how you guy's are giving me lessons on how shit works....
Fuel > Spark > Boost
3800GTV6 3 years ago
wtf does fuel>spark> boost mean? i guess compression and heat of compression doesnt mean anything....
ls1maro99 3 years ago
You really don't know what that means?
It's the importance of tuning, once again, I don't expect you to understand.
3800GTV6 3 years ago
how you have it wrote makes no sense... so fuel is greater than spark and spark is greater than boost? that makes no sense what so ever..
ls1maro99 3 years ago
Once again, I do NOT expect you to understand!!!
If you were a tuner, you would unerstand the importance of that order when tuning.
3800GTV6 3 years ago
or your just retarded and have no idea what you are trying to talk about. Sense you cant explain what you are even trying to say. Like i said before you really do not know what you are trying to talk about period!
ls1maro99 3 years ago
Fueling is more important then spark and spark is more important than boost, noob.
If the fueling is all jacked up you cannot tune for spark advance/retard. Boost and spark are directly proportional in regards to what boost level you can run. Less timing, more boost. More timing, less boost. And this is of course if the fueling is tuned properly.
Do you understand the importance now, Mr. Noob?
3800GTV6 3 years ago
lol nice words... just a little on the vag side... by spark you mean timing? All the spark does is heat up the temperature to its auto ignition point. Boost doesnt really have a whole lot to do with timing its more of knocking and pinging... And AFR has to be richer than stoich other wise you really wont go anywhere... thats just common sense..
ls1maro99 3 years ago
Spark advance/retard = Timing, Mr. Noob.
3800GTV6 3 years ago
"spark" is when there is enough potential difference between positive and negative ions to ionize the air and fuel between the spark plug gap. Timing is always measured advanced or retard from TDC. I don't think I am the one who is a noob. :)
ls1maro99 3 years ago
"Spark" is auto slang for timing advance/retard lol
I know how spark plug works...that is not even what I was referring to. I thought I could be more laid back with you because you seem like a car guy and use a few slang terms, but I guess you need the more anal reasoning lol
3800GTV6 3 years ago
Sorry the term "spark" usually refers to the actually seeing of the electrons moving after ionization occurs. If you really want to we can get into primary coil current ramps, secondary ionization voltages, spark kv, burn time.... ect.. But I am sure sense I am the noob all of that would be a cake walk for you to understand.
ls1maro99 3 years ago
Way to list "advanced" terms lol You must really know what you are talking about...
I tuned my car on E85 all by myself... You have to consider a HELL of a lot more than that to fully tune for E85. If I gave you a tuner, you would choke after you see the complexity of tuning for SA/R Tables, IFR vs MAP Tables, GST, BST, IAT vs SA, MAF Mhz tables...and making changes according to the AFR...you wouldn't have the slightest idea what to do... :)
3800GTV6 3 years ago
I have a 92 tsi awd on e85 :)
ls1maro99 3 years ago
Guaranteed you didn't tune it yourself. When I refer to to "spark advance" you think the actually spark that the plug makes LOL
You = Hardcore noob.
Since you are so smart, go ahead and tell me what all those things are that I listed ;)
3800GTV6 3 years ago
dude are you seriously retarded? I told you was "spark" is... you need to used correct terms.. your referring to ignition timing for like the 4th time. Spark a whole different thing... You so retarded you didnt even catch that i was correcting you...
If a spark plug doesn't provide a spark to raise the temperature to raise it to its auto ignition point then what does? hmmm must run like a diesel...
ls1maro99 3 years ago
"You so retarded"...you sure about that???
Wow just stop talking man lol I think we all know who the retard is.
3800GTV6 3 years ago
lol are you sad that i stopped talking or something? lol i have better things to do then to argue with your dumbass...
ls1maro99 3 years ago
Sad? Haha I actually have a life man...I've been out of state racing for the past week.
What have you been doing? Besides the obvious gay activities.
3800GTV6 2 years ago
And for the record, I do all my own tuning on my car, and many of my friends (LS1 Formula, SRT4,etc) cars.
If you really think I don't know what I am talking about, then you need to relearn how a car operates, because I really don't think you even know how a car works.
3800GTV6 3 years ago
I hate to break it to ya, but you do not know everything and nor do I. PSI is relative idiot, 7psi in a 6.0 is not the same as 7psi in a 2.2.
Also, your acting like a tool.
SpecialSause2 2 years ago
Idiot? Little late on the posts are we??? Haha...
Don't lecture me on tuning or motors, because I clearly know more than you.
Never said PSI was irrelevant. CR and CI have more do with power than boost.
3800GTV6 2 years ago
First test and tune is on the 20th of March. Expecting a mid 12 ;)
Putting down about 310 WHP and close to 375 wheel torque on my new setup.
3800GTV6 3 years ago
You don't think I know that? Haha My Grand Prix would toast any Slowbalt's any of you guys have...
I build motors for a living. Do not sit there and tell me how a blower works...I've rebuilt more superchargers than you could ever dream of.
3800GTV6 3 years ago
This has been flagged as spam show
I am 18 years old.
3800GTV6 3 years ago
You'll still be slow. Haha my Grand Prix would KILL your Slowbalt on 12 PSI.
12.98 @ 106, street tires with a 1.9 60'
3800GTV6 3 years ago
Lol I can clearly tell you have no idea how a supercharger works...
Mods affect boost levels. Exhaust mods and intake mods REALLY affect boost levels. The more air you can get out of the engine (exhaust mods) the less boost the blower will create on any given pulley.
Oh and 18 PSI on a 2.9, sounds like you're boost stacking to me ;)
3800GTV6 3 years ago
"The more air you can get out of the engine (exhaust mods) the less boost the blower will create on any given pulley."
but that is only if the exhaust is really a restiction.
18 PSI on a 2.9 sounds like boost stack to me as well ;)
lurch1489 2 years ago
@lurch1489 No man thatsd not right. The more air exiting (with exhaust mod) the more air is entering and you boost more. Trust me man i got a CAI and highflow cat dp and headers and my boost went up about 2 psi.
bettermaxim 1 year ago
@bettermaxim nope.
lurch1489 1 year ago
@lurch1489 do you even know where the pressure sensor for the boost is located? cuz it doesn't sound like you know much about this car or any type of boosted car for that matter.
bettermaxim 1 year ago
@bettermaxim not specifically on this motor, but my guess would be the lower intake manifold.
Now, if the Cobalt's intake is super restictive, I could see you gaining boost. However, you are not going to gain boost by going from the stock manifold to a header. Boost is a measure of pressure that is being built up in the motor. If an exhaust manifold is restrictive enough, then not all of the pressure will be relieved in the exhaust cycle and "create" more boost, also known as boost stacking.
lurch1489 1 year ago
@bettermaxim part 2-
Going from a Exhaust Mani to a header allows the motor to breathe better, relieving the motor from the extra restriction, in turn losing "boost."
When I switched to headers from ported mani's on my GTP, I dropped 1.5 lbs of "boost" due to the exhaust being too restricive and boost stacking.
I get that you are trying to say that the motor being able to expell the gases should make it be able to make more boost but that is not the case.
lurch1489 1 year ago
that's not a 2.8 pulley...it only showed 14 or 15 lbs boost
poonannidanny 3 years ago
Stock with AEM Cold Air and Denny Super Stock Tune i came out with 219WHP / 192WTQ
r0k088 3 years ago
You are so stupid man.
Do you even know how a supercharger works, much less how the pulley size effects the motor?
3800GTV6 3 years ago
only 15 psi? my stage 2 pushes 18
kassid81 3 years ago
It never even hits 15. I'm guessing this is a GM stage 2 Cobalt.
rebeldragon69 3 years ago
wtf? you only got 234 whp? you only running the pulley not 60 pounders or anything?
black2007cobaltss 3 years ago
I have a 3 inch and I run 15 psi...
kassid81 3 years ago
umm a guy i know its running a 2.98 or close stage 2 and its at 17.5 psi. so only 15 psi at 2.8 sounnds like something is wrong there lol
ssmrico 4 years ago
my uncle had a 3" and was running 15 psi.... lol
i'm still running 11psi on stock pulley
cant wait to trow in the 2.6 XD
r0k088 4 years ago
2.6? Your blower is going to hate you.
nickster914 3 years ago
just whine more..! :)
r0k088 3 years ago
your stupid. your going to overboost it and ruin it
jorbeezy 3 years ago
no i'm not.. i'm gonna set the boost to max 18psi which is the safe zone for the SC and intake.. with the meth injection and dual pass end plate.. not going to hurt it at all.. even if i decide to set it to 20psi.. i', still gonna be safe
r0k088 3 years ago
Wtf was he doing a Dyno run in 4th gear?
dgomez623 4 years ago
ya he was just like your suppose to do!! dynoed before?
bszondi 4 years ago
that car doensnt have a 2.8" pulley...you only boosted 15lbs. I have a 2.79" and i'm right at 18lbs
SSCobalt06 4 years ago
yeah i dont even see it shifting..weird..how does it get up that quick that is sic..i have a 05 black ss...i wanna be that quick damn lol
nathankarina 4 years ago