A fun riddle for you guys...
10-15-2008, 06:02 AM
#1
A fun riddle for you guys...
What runs a 3" pulley, but only makes 200ish WHP...
...my car!
my question is why? It should be closer to 230WHP, like all the other stageII cobalts out there...or even more.
Im sure you guys have a better flowing head, which would limit my HP a bit, but i also have 0.2L more displacement than you guys, and on a 10:1 CR, and ive got a full exhaust, running stock LSJ intake...so why am I making less HP than a stock SS when if anything i should be making more? is the LS head really just that restrictive?
just a little info, im running the 3" pulley, 42lb injectors, mods in sig, usually an AFR in the high 11's, sometimes low 11's sometimes low 12's (never higher than 12.2) depnding on weather, and while i dont know my max timing off the top of my head, i can check if you guys would like...but im pretty sure my tune is solid. its an instant 9psi always (sometimes instant 10psi) and it slowly creeps up to 11psi to 11.5psi, so i dont think its belt slip or anything either....
...my car!
my question is why? It should be closer to 230WHP, like all the other stageII cobalts out there...or even more.
Im sure you guys have a better flowing head, which would limit my HP a bit, but i also have 0.2L more displacement than you guys, and on a 10:1 CR, and ive got a full exhaust, running stock LSJ intake...so why am I making less HP than a stock SS when if anything i should be making more? is the LS head really just that restrictive?
just a little info, im running the 3" pulley, 42lb injectors, mods in sig, usually an AFR in the high 11's, sometimes low 11's sometimes low 12's (never higher than 12.2) depnding on weather, and while i dont know my max timing off the top of my head, i can check if you guys would like...but im pretty sure my tune is solid. its an instant 9psi always (sometimes instant 10psi) and it slowly creeps up to 11psi to 11.5psi, so i dont think its belt slip or anything either....
Last edited by HunterKiller89; 10-15-2008 at 06:17 AM.
10-15-2008, 06:17 AM
#2
Junior Member
Join Date: 07-26-06
Location: Virginia
Posts: 477
Likes: 0
Received 0 Likes
on
0 Posts
idk. i'm not a huge tech guy, but i'm under the impression that you cant have a different engine, and expect to have the same output as a 2.0, just because you have similar mods. Also keep in mind we are boosting at least 15 psi with a stg. 2. Maybe the diameter on your exhaust is too wide, losing too much back pressure, or try getting an intake to get more condensed/cooler air into your blower...
Idk like i said i'm not a tech - good luck tho
Idk like i said i'm not a tech - good luck tho
10-15-2008, 06:44 PM
#5
Senior Member
Join Date: 05-16-06
Location: CT
Posts: 6,298
Likes: 0
Received 0 Likes
on
0 Posts
Probably all in the tune. Not much help I know, but thats probably what it is.
bhp and whp are two different things.
BTW Hunter, what is your torque? And are you on stock cams? That could be part of it as well.
Oh, and the fact that you have an Auto.
BTW Hunter, what is your torque? And are you on stock cams? That could be part of it as well.
Oh, and the fact that you have an Auto.
Last edited by XM15; 10-15-2008 at 06:46 PM. Reason: Automerged Doublepost
10-15-2008, 06:46 PM
#6
Senior Member
Join Date: 07-17-07
Location: right behind you.
Posts: 9,378
Likes: 0
Received 0 Likes
on
0 Posts
what kind of dyno first of all? second, your engine is different, there may be alot of things that set it apart form the 2.0. I don't know all that much about the 2.2, but is the crank pulley the same size? If not, you're gonna be spinning the blower at a different speed with the same size blower pulley.
10-15-2008, 06:50 PM
#7
Senior Member
iTrader: (2)
Join Date: 02-12-07
Location: new jersey
Posts: 2,511
Likes: 0
Received 0 Likes
on
0 Posts
a 55hp gain really isnt that bad the ss/sc was made for boost 2.2-2.4s are not, are engines are made to flow better and ur not running a lot of boost. remember its not a turbo ur using power to make power now
10-15-2008, 07:01 PM
#9
what kind of dyno first of all? second, your engine is different, there may be alot of things that set it apart form the 2.0. I don't know all that much about the 2.2, but is the crank pulley the same size? If not, you're gonna be spinning the blower at a different speed with the same size blower pulley.
its about 250bhp, 200whp, though the whp is an estimation, and i have no idea what tq i have....sure feels like a good improvement whatever it is though
10-15-2008, 09:39 PM
#10
Senior Member
Join Date: 05-16-06
Location: CT
Posts: 6,298
Likes: 0
Received 0 Likes
on
0 Posts
Don't assume you're only at 200whp if you haven't dynoed yet. 
The reason I asked about the cams is because the 2.0 setup makes power higher in the band than the 2.2 does. I'm not sure how the upper rpms on the 2.2 respond to boost though.
The reason I asked about the cams is because the 2.0 setup makes power higher in the band than the 2.2 does. I'm not sure how the upper rpms on the 2.2 respond to boost though.
10-17-2008, 11:53 AM
#13
Senior Member
Join Date: 09-25-06
Location: USAG Stuttgart, GER
Posts: 1,860
Likes: 0
Received 0 Likes
on
0 Posts
how are you monitoring knock hunter? Do you have a dashawk or interceptor to tell you if your seeing any? You should get one so you can run as much timing as possible. Your probably losing a lot of power because of the tune overall. I know its gonna be hard to do with a AEM FIC and a partial tune but just keep working on it.
10-17-2008, 12:13 PM
#14
Senior Member
iTrader: (1)
Join Date: 04-13-04
Location: Indiana
Posts: 3,394
Likes: 0
Received 0 Likes
on
0 Posts
im pretty positive all crank pulleys amongst ecotecs are the same size, though ill go verify this with MRZ. im running stock cams...the same cams as the LSJ only the timing is at different specifications (basically i need adjustable cam gears). It hasnt been dynoed yet, but i was assuming about 18-20% drivetrain loss. The automatic shouldnt affect crank hp, which should still be closer to 300 than 250. Thanks for the ideas though.
its about 250bhp, 200whp, though the whp is an estimation, and i have no idea what tq i have....sure feels like a good improvement whatever it is though
its about 250bhp, 200whp, though the whp is an estimation, and i have no idea what tq i have....sure feels like a good improvement whatever it is though
10-17-2008, 05:14 PM
#16
how are you monitoring knock hunter? Do you have a dashawk or interceptor to tell you if your seeing any? You should get one so you can run as much timing as possible. Your probably losing a lot of power because of the tune overall. I know its gonna be hard to do with a AEM FIC and a partial tune but just keep working on it.
10-18-2008, 12:42 AM
#17
Senior Member
Join Date: 06-22-08
Location: PA
Posts: 1,320
Likes: 0
Received 0 Likes
on
0 Posts
I don't recall what the stock compression ratio is for the 2.2 and I don't know what you increased it to (10:1?) but that can be a problem with higher boost. What do you mean by "stroked"; do you mean just the pistons or did you change the sleeve bore?
He's saying that just because you say it doesn't "feel" like 200 hp doesn't mean it might be making that. Interceptors aren't accurate until you adjust them with horsepower. Also, because you are auto there may be some sort of torque reduction/protection occuring at the tranny.
Last edited by theneelster; 10-18-2008 at 12:42 AM. Reason: Automerged Doublepost
10-18-2008, 12:47 AM
#18
Senior Member
Join Date: 06-15-08
Location: Maple Ridge, B.C Canada
Posts: 4,339
Likes: 0
Received 0 Likes
on
0 Posts
i dont how your complaining about the lack of horsepower it makes yet it hasnt even been on a dyno yet. Go dyno it, then come back and complain about the horsepower, you dont even know what the hell your car makes until you dyno it.
10-18-2008, 04:14 AM
#19
Hmmm...if you haven't dynoed it I'm going to say it's probably your "solid" tune. Flash on the stage 2 canned tune and see how it runs...no wait...that won't work because you have increased displacement.
I don't recall what the stock compression ratio is for the 2.2 and I don't know what you increased it to (10:1?) but that can be a problem with higher boost. What do you mean by "stroked"; do you mean just the pistons or did you change the sleeve bore?
He's saying that just because you say it doesn't "feel" like 200 hp doesn't mean it might be making that. Interceptors aren't accurate until you adjust them with horsepower. Also, because you are auto there may be some sort of torque reduction/protection occuring at the tranny.
I don't recall what the stock compression ratio is for the 2.2 and I don't know what you increased it to (10:1?) but that can be a problem with higher boost. What do you mean by "stroked"; do you mean just the pistons or did you change the sleeve bore?
He's saying that just because you say it doesn't "feel" like 200 hp doesn't mean it might be making that. Interceptors aren't accurate until you adjust them with horsepower. Also, because you are auto there may be some sort of torque reduction/protection occuring at the tranny.
L61 = 86mm bore X 94.6mm stroke with 10.0:1 CR
im saying the L61 is effectvely a stroked LSJ with a higher CR and a more restrictive head
I cant flash on a stgII tune because i dont have an LSJ...
you DO know i have a LS right?
anyway i know AFRs are correct. Someone wanna tell me what their timing is at say...6,000RPM on a stgII cobalt...or any 3" pullied cobalt? ill go comapre it to my timing
Thread
Thread Starter
Forum
Replies
Last Post