Attention 2.4 Super/turbocharged Owners
03-10-2009 | 07:06 PM
#26
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From: Pinckney, MI
lol these cars are not meant to be bought as race cars, even the turbo and supercharged balts arent, they are meant to be a fun sport compact car. In the end, its a better investment actually to put money into the looks of these cars rather then performance fi your looking to sell them later down the road.
ive seen some remarkable feats with the cobalt, i used to work at roush and the performance department modded a cobalt to have 650 whp in a week, just to tear it down and put it back to stock... sadness.
03-10-2009 | 07:10 PM
#27
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From: Maple Ridge, B.C Canada
its just a pity pulling up next to an eager srt 4 and getting your ass handed to you because you think your a street racing god in your lil LS, LT, sport, or supercharged stock...you cant say you havent been there before, being egged on by some high school **** in his birthday present from his loaded parents.
ive seen some remarkable feats with the cobalt, i used to work at roush and the performance department modded a cobalt to have 650 whp in a week, just to tear it down and put it back to stock... sadness.
ive seen some remarkable feats with the cobalt, i used to work at roush and the performance department modded a cobalt to have 650 whp in a week, just to tear it down and put it back to stock... sadness.
03-10-2009 | 07:15 PM
#28
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From: Pinckney, MI
its entertaining...i was on the road the other day when a 5.0 mustang pulled up next to me and his goofy ass wanted to race. im not stupid.
he floored it at the light and took off, easily going 30 over the speed limit.
bout 3 minutes later i caught up to him as he sat on the side of the road with the real 5-0 writing him a ticket. i won that race. hahahaha
03-10-2009 | 07:15 PM
#29
Not to be a dick but do you even read my post? i even posted the PDF file from GM of where i found my info, i didnt pull it outa my ass. Trust me, up until a few days ago i beleived the 2.4 internals were different also but from that newest PDF file released from GM they are saying its not.
Not only that but my article also has a chart showing the hp limit for the engine parts. The chart says the LE5 and L61 pistons and rods are only good to 250hp
Not only that but my article also has a chart showing the hp limit for the engine parts. The chart says the LE5 and L61 pistons and rods are only good to 250hp
from THEIR 08 LE5 readout.. (which according to gm year update sheets nothing changed internals wise, I could go and pull up the 06 and 07 sheets if you REALLY want me to )
Connecting rods: forged steel
for the L61....
Connecting rods: forged powder metal
did you happen to read my link before you posted..
also.. if thats the case how are there multiple 2.4's running over 250.. not to mention some that hap pushed mid 300s... and all the solstice guys...
yea .. let me know about that one..
you keep trying to prove me wrong man.. please.. this info wasn't something I pulled out of my ass either
it also says that the LNF has the same material for rods.. YEA OK! lol
further more the 250 limit was placed on every engine.. even the LSJ (if i remember correctly).. because they tested HP limits using a shot of nitrous....
03-10-2009 | 07:17 PM
#30
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From: Pinckney, MI
... sigh.. your link is from gm tuner source.. mine is from gm media...
from THEIR 08 LE5 readout..
Connecting rods: forged steel
for the L61....
Connecting rods: forged powder metal
did you happen to read my link before you posted..
also.. if thats the case how are there multiple 2.4's running over 250.. not to mention some that hap pushed mid 300s... and all the solstice guys...
yea .. let me know about that one..
you keep trying to prove me wrong man.. please.. this info wasn't something I pulled out of my ass either
it also says that the LNF has the same material for rods.. YEA OK! lol
further more the 250 limit was placed on every engine.. even the LSJ (if i remember correctly).. because they tested HP limits using a shot of nitrous....
from THEIR 08 LE5 readout..
Connecting rods: forged steel
for the L61....
Connecting rods: forged powder metal
did you happen to read my link before you posted..
also.. if thats the case how are there multiple 2.4's running over 250.. not to mention some that hap pushed mid 300s... and all the solstice guys...
yea .. let me know about that one..
you keep trying to prove me wrong man.. please.. this info wasn't something I pulled out of my ass either
it also says that the LNF has the same material for rods.. YEA OK! lol
further more the 250 limit was placed on every engine.. even the LSJ (if i remember correctly).. because they tested HP limits using a shot of nitrous....
im not taking sides on this debate but just out of curiousity how many horsies do you got in that ion?
03-10-2009 | 07:18 PM
#31
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Joined: 01-17-07
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From: New Bern, NC
Let me tell you another thing about 2.2/2.4 and 250+ whp... You don't want to go much over that, unless you are planning to do something to offset the torque steer.
Even at my levels in can be a little unbearable at times.
The solstice/sky is another matter altogether. Throw in an LSD and it's another matter, altogether.
Even at my levels in can be a little unbearable at times.
The solstice/sky is another matter altogether. Throw in an LSD and it's another matter, altogether.
03-10-2009 | 07:22 PM
#32
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From: Maple Ridge, B.C Canada
... sigh.. your link is from gm tuner source.. mine is from gm media...
from THEIR 08 LE5 readout.. (which according to gm year update sheets nothing changed internals wise, I could go and pull up the 06 and 07 sheets if you REALLY want me to )
Connecting rods: forged steel
for the L61....
Connecting rods: forged powder metal
did you happen to read my link before you posted..
also.. if thats the case how are there multiple 2.4's running over 250.. not to mention some that hap pushed mid 300s... and all the solstice guys...
yea .. let me know about that one..
you keep trying to prove me wrong man.. please.. this info wasn't something I pulled out of my ass either
it also says that the LNF has the same material for rods.. YEA OK! lol
further more the 250 limit was placed on every engine.. even the LSJ (if i remember correctly).. because they tested HP limits using a shot of nitrous....
from THEIR 08 LE5 readout.. (which according to gm year update sheets nothing changed internals wise, I could go and pull up the 06 and 07 sheets if you REALLY want me to )
Connecting rods: forged steel
for the L61....
Connecting rods: forged powder metal
did you happen to read my link before you posted..
also.. if thats the case how are there multiple 2.4's running over 250.. not to mention some that hap pushed mid 300s... and all the solstice guys...
yea .. let me know about that one..
you keep trying to prove me wrong man.. please.. this info wasn't something I pulled out of my ass either
it also says that the LNF has the same material for rods.. YEA OK! lol
further more the 250 limit was placed on every engine.. even the LSJ (if i remember correctly).. because they tested HP limits using a shot of nitrous....
Yes i have read the link, i read it a long time ago, and i never thought it was bs, i just happend to find some new info a few days ago which made me question it.
And no the chart does not say the LSJ/LNF are rated for the same hp limits as the LE5
LE5/L61 Rods and pistons: 250 hp
LSJ/LNF pistons: 300 hp
LSJ/LNF Rods: 400 hp
03-10-2009 | 07:24 PM
#33
Yes i have read the link, i read it a long time ago, and i never thought it was bs, i just happend to find some new info a few days ago which made me question it.
And no the chart does not say the LSJ/LNF are rated for the same hp limits
LE5/L61 Rods and pistons: 250 hp
LSJ/LNF pistons: 300 hp
LSJ/LNF Rods: 400 hp
And no the chart does not say the LSJ/LNF are rated for the same hp limits
LE5/L61 Rods and pistons: 250 hp
LSJ/LNF pistons: 300 hp
LSJ/LNF Rods: 400 hp
Last edited by elecblue06; 03-10-2009 at 07:24 PM. Reason: Automerged Doublepost
03-10-2009 | 07:27 PM
#34
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From: Maple Ridge, B.C Canada
right now i estimate about 180 or so whp.. on boost about 250-260 i'll know very soon
even still man.. the lsj has been taken WAY over that my many people.. because it was done on a 125 shot of nitrous (which obviously makes it over 250 so derka lol) and that "new info" you found is from 07.. or older..
even still man.. the lsj has been taken WAY over that my many people.. because it was done on a 125 shot of nitrous (which obviously makes it over 250 so derka lol) and that "new info" you found is from 07.. or older..
I dunno, it just seems harder to beleive a brief 1 page write up over a 100+ page very detailed write up on these motors.
03-10-2009 | 07:30 PM
#35
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From: New Bern, NC
Red2.4SS has 30,000 miles on his Trifecta-tuned, Garrett Turbo'd 2.4, and is putting out 264 whp I believe. Not blown up.
I've got about 8,000 on mine, all but the last few hundred miles on the Hahn 'tune'. The motor can handle it.
I've got about 8,000 on mine, all but the last few hundred miles on the Hahn 'tune'. The motor can handle it.
03-10-2009 | 07:38 PM
#37
longwindedness doesn't = credibility
http://media.gm.com/us/powertrain/en...2007/07car.htm
choose to believe what you like.. but something linked from gm has my vote
03-10-2009 | 07:45 PM
#39
03-10-2009 | 11:19 PM
#40
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Joined: 05-26-05
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From: Pittsburgh, PA
Ha, okay. Yeah, I don't know if you've watched it or not -- but the guy basically talks about how it shoots the 'fast' exhaust out, and has magical vents to suck 'slower' exhaust at a faster rate.
I think bolt ons are fine if you're looking at them as an appearance (or sound) modification.. but if you're at all concerned about the 'gains'. Well, no --- even if an intake was good for 5 hp, $250 for a 5 hp gain is a lot. There's a reason CED lists the 'GMPP Intake' as an 'Under hood accessory.'
It all boils down to what you want to do. If you're wanting to keep your car, but make it a hell of a lot quicker, forced induction is the way to go. I could be wrong, but I don't think I've heard of anyone blowing up a 2.4 under 'appropriate' boost levels (under 12 psi) -- Celicacobalt cracked his intake manifold around that level, but that's about it.
^^ The only person I've heard talk about the internals of the 2.4 was Hahn when they were breaking down the motor to put together the kits for the Solstice/Sky 2.4s. He didn't say it was forged, but that something with the oil system made it capable of handling a fair amount of boost -- That could've easily been confused by someone.
But why the debate, are forged internals really a necessity if you aren't talking about stupid amounts of boost (20 psi+).
Btw, how much stock are going to put into a GM manual that also lists the LSJ as 205/200 when they Dyno higher than that --- where as it lists the LE5 as 177 when even fully bolt ons aren't putting down those numbers at the wheels. The book is inconsistent.
I think bolt ons are fine if you're looking at them as an appearance (or sound) modification.. but if you're at all concerned about the 'gains'. Well, no --- even if an intake was good for 5 hp, $250 for a 5 hp gain is a lot. There's a reason CED lists the 'GMPP Intake' as an 'Under hood accessory.'
It all boils down to what you want to do. If you're wanting to keep your car, but make it a hell of a lot quicker, forced induction is the way to go. I could be wrong, but I don't think I've heard of anyone blowing up a 2.4 under 'appropriate' boost levels (under 12 psi) -- Celicacobalt cracked his intake manifold around that level, but that's about it.
^^ The only person I've heard talk about the internals of the 2.4 was Hahn when they were breaking down the motor to put together the kits for the Solstice/Sky 2.4s. He didn't say it was forged, but that something with the oil system made it capable of handling a fair amount of boost -- That could've easily been confused by someone.
But why the debate, are forged internals really a necessity if you aren't talking about stupid amounts of boost (20 psi+).
Btw, how much stock are going to put into a GM manual that also lists the LSJ as 205/200 when they Dyno higher than that --- where as it lists the LE5 as 177 when even fully bolt ons aren't putting down those numbers at the wheels. The book is inconsistent.
Overall I like my 2.4 turbo but its hard to control all that power going to the front wheels. would be more fun if it was rwd. The key is in the tune you get, im still trying to get my tune down right. eventually i will be able to hook up with an ecotec specialist instead of some random shop that doesnt really know what they are doing.
03-10-2009 | 11:26 PM
#41
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From: St. Charles, MO
I just wonder, my friend has a 2.4, and he wants to at some point put a M62 on it. And from my world, Audi, the 2.8 which is not built, will not stay together with more than 10-12 psi(300CHPwith a supercharger that runs 9psi). Nothing is forged, 2 bolt mains. The 2.7T is built OEM, enough to handle 24-26 psi from twin K04s(500+CHP) with all stock forged crank and 4 bolt mains. I know that Forged internals are important for building power, but as was said, are they needed for light boost?? Hmm, I guess it depends on the engine.
I would believe the link elecblue posted, makes sense, since GM spins the 2.4 almost 7k, that they would build it a lil better. And also, that GM cut it as its to expensive. Forged rods is 100% believable.
"11psi: 261 Whp / 358 Wtq " damn, thats some torque! May I ask, what turbo are you using?
I would believe the link elecblue posted, makes sense, since GM spins the 2.4 almost 7k, that they would build it a lil better. And also, that GM cut it as its to expensive. Forged rods is 100% believable.
"11psi: 261 Whp / 358 Wtq " damn, thats some torque! May I ask, what turbo are you using?
03-11-2009 | 04:42 PM
#42
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Joined: 12-11-07
Posts: 568
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From: Albany, NY
how has your aftermarket installation held up? Many cobalt owners i know have wondered about getting a super/turbocharged kit for their cobalts but are weary about how it holds up.
if you have any experience, good or bad with bolting on a turbo or supercharger please post here with any information to help the rest of us out. thanks.
btw supercharging or turbocharging a 2.4 is an impressive (and expensive) feat, kudos.
if you have any experience, good or bad with bolting on a turbo or supercharger please post here with any information to help the rest of us out. thanks.
btw supercharging or turbocharging a 2.4 is an impressive (and expensive) feat, kudos.
03-11-2009 | 06:26 PM
#43
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From: New Bern, NC
didnt crack the intake manifold, just blew an intake gasket and had them replaced.
Overall I like my 2.4 turbo but its hard to control all that power going to the front wheels. would be more fun if it was rwd. The key is in the tune you get, im still trying to get my tune down right. eventually i will be able to hook up with an ecotec specialist instead of some random shop that doesnt really know what they are doing.
Overall I like my 2.4 turbo but its hard to control all that power going to the front wheels. would be more fun if it was rwd. The key is in the tune you get, im still trying to get my tune down right. eventually i will be able to hook up with an ecotec specialist instead of some random shop that doesnt really know what they are doing.
CALL TRIFECTA! The car is absolutely, totally, and ridiculously different with his tune. He's now done mine, Red2.4SS's and a few FI 2.2L.
My advice:
- 50-something# injectors (Vince thinks 60# may be a bit big, obviously the Bosch are a bit small). However, I am running 60#
- Buy a GOOD fuel pressure regulator (doesn't matter if it's made for boost or not). However, I did keep the Hahn FMU, just disconnected it from the boost.
- Keep your returnstyle fuel setup (I'm running at 45 psi fuel now). You could also just buy a new fuel pump and go back to returnless.
- Get a tune to let the computer manage your fuel maps. I used Trifecta, you could also do a local tuner, or find a user near you who knows HPTuners.
The problem with the way the 'Hahn' kit works is the boost fuel pressure regulator. Take that out of the equation and you are golden. Seriously, it will make your life so much better...
03-11-2009 | 08:32 PM
#45
I kno its not a supercharger or a turbo but I've had a 100 shot on my 2.4 tuned with full boltons and traction mods running 13's and still runs awsome just took a 600mile trip 33.4 mpg average
03-18-2009 | 09:13 AM
#47
03-18-2009 | 12:32 PM
#48
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From: Pinckney, MI
Theres not that many things from gm for the turbo and supercharged balts besides the stage kits which most go beyond those anyways and void their warranties lol
Besides unless your taking your car to the track i dont see why u have an urge for more power, these cars have plenty of passing power on the highway great cruisers, so unless ur a drag racer or an auto cross guy where this big want for hp?
Besides unless your taking your car to the track i dont see why u have an urge for more power, these cars have plenty of passing power on the highway great cruisers, so unless ur a drag racer or an auto cross guy where this big want for hp?
btw i test drove the '10 camaro and im in friggin love.
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