From what ive seen and read on here a 2.4 LE5 does indeed make around 140-150 to the wheels.

Hell when I was in phoenix I saw one of the early ecotec cavaliers put down 127whp to the wheels stock then do 138whp with a piece of 3 inch exhaust piping and an autozone ricer filter. (this was at UTI's Avondale campus the winner of the hotrod class got to do 3 dyno passes)

Now how is it hard to believe a 2.4 with more displacement a slightly better exhaust a better intake and variable valving couldnt put down another 20 to the wheels when the factory rating is around 30-40hp higher at the crank?

Going by old school drivetrain loses (newer transmissions are now more efficent) but factoring 15% drivetrain loss a would put an Le5 between 140-150hp to the wheels.

http://www.youtube.com/watch?v=D-DLS4Kw1ps
ok so this is a 2.2 stock base 5 spd. It did 130 to the wheels. So I guess your right. .2 liters more displacement. A better exhaust. A better intake. Variable valve timing isnt worth 15-20hp to the wheels....

Heres a 2.4 with the lesser injen intake
http://www.youtube.com/watch?v=hNO6vQoO2qc

So it seems very possible for a 2.4 to be in the 140-150 range stock

 

sigh...
its the same exhaust, same intake, and VVT doesnt help power so much as it does help fuel economy.
i would say a LE5 puts down 140-145whp. 150whp seems a bit high to me. And again, Im refuting that he gained 23whp from 2 bolt ons...idk why you're arguing stock power levels when that isnt the main focus of my argument

 

because its the basis of that arguement and the intake is not the same as 2.2 guys like to buy the 2.4 manifolds. Now the intake plumbing is the same mostly. So if K&N claims 17hp and he has a catback and header this is an easy # to see. Furthermore its easy to see a 15-20hp gain from a tune. So the argument comes back to the #'s he made. See its believable.

 

stock dyno and K&N only dyno, same dyno just a year apart.



08 2.4L

 

I was curious what an 08 might put out since they revised them slightly.

 

^^ yeah i can out run most Civic Si that I come up against. My friend has header, cat delete and CAI, I can pull on him from a roll. If we run 3rd gear I can put him at my rear bumper at least but the end of 3rd.

 

it was also 27* cooler that day
thats a biig factor. Nice gains though

 

Well, the only logical thing to do is everyone should donate to me so I can mod my 2.4L with every upgrade out there and then we will do before and after dynos. You guys could write it off on your taxes

 

I have an 07 2.4l SS w. CAI, Header, high flow Cat, w. a Vibrant performance resonator and FLO -Master Exhaust.. I also have a jet performance plus module, the one you wire in. it started messing w/ my car, turning in some reduce mode. so I took it off.


But now Im looking for another gain, and I have had my eye and hears set on Cams. so im looking at JBP cams, and spending my ECU in to get reprogramed. sound good right???



Can I just do Cams and a reprogram on the ecu, or from my understanding, when you replaces cams you have to replace springs, valves, reteinceners.

 

be carefull with jbp

 

supercharge it lol

 

whats wrong with JBP? has anyone done cams on their 2.4l

 

Oh lord this thread.

 

search and find out
no bueno

 

Dont bother with cams man. Just boost or supercharge if your leaning towards making big power. If your wanting to stay n/a and make a few hp do full boltons and a tune either by hpt or trifecta.

 

IIRC the problem with JBP was the people who ordered them never received them. I think one person managed to do it and saw decent gains 10-20hp increase maybe. If you search you should be able to find the thread about it.

 

i have 175 wheel to a 2.2

 

Same day, a stock LE5 put down 147whp

And an LNF Solstic 242

06 Eclipse GT 247

on the same dyno.

Super happy dyno numbers there.

Search for threads with a guy named G5Mike

 

Oh nah man, from a dig I'll get **** canned. But the funny thing about my Cobalt that no one seems to understand is once I hit about 70 the car comes alive. The previous owner had to have tuned it, because for some reason all the power is in the high RPM range. It's like 0.....................60, 60 to 120. I am able to pull of some of these races because my Cobalt drives like its on rails. The faster I go, the better it handles. I take my fair share of losses, no doubt. All I am saying is that all that power is worthless if your car doenst handle well at high speeds, or if you just simply cant drive. Not speaking of you or anything, I'm just saying that in general. My Cobalt was the victim of some last minute
demodification just before I bought it. I made a couple of errors but I dont care. I got exactly the car I wanted. If it doesn't beat everything thats cool. For instance, the car had NOS before. This was evidenced by remaining hoses and hole cut out for the switch. The stock airbox.....isnt the stock airbox. Easy to tell when the holes don't match up. The intake and plenum was brand spanking new with galzanized connecting bolts. Suspicious ground wires in pairs of two in front of the radiator. Several wires underneath the drivers side dash that were freshly cut. The downpipe is stock, but the pipes and mufflers are aftermarket. Last but not least, although I am not for sure, but the cams are not stock. There is no way they could be because the car idles like a Harley Davidson. All those things I wrote before I have actually changed my mind on. My plan now is keep the car the way it is. I barely got over 40k miles on the car and its 4 years old. Instead, I found a wrecked SS and yanked the 2.4 out of it. Once I get it all apart, then its off to the machine shop. For the next couple of years I'm gonna build that engine slowly, so I don't have to dump all my money at once. I figure by the time my engine is tired, I'll have a monster 2.4 to go in it. If it winds up costing 10k, thats cool because I'll spend the money over a few years. There shouldnt be any reason why the 2.4 can't produce 300 HP before it even goes in the car. And to top it all off, I can upgrade the tranny for free since my uncle has a shop. I go to the drag races and see these 2.4's putting out 1300 HP, so I know it can be done. "There's no replacement for displacement." I remembered that when I was racing a Civic and a G35 and a Ford Lighting passed us like we were parked. I guess I am a troll. Lol!

Oh by the way if anyone who reads this has used ecotec engine blocks or heads, I would be interested in them as long as they arent cracked or warped.

Thank You.

 

oh sweet jesus..... I dont even know where to start on this.... who wants to pick this up for me?

The whole post above mine one thing came to mind.... Facepalm...

 

Now Jeff see thats exactly why I think there was a tune done before. I have a 4 spd auto, and I can get to 128 in third gear with the gas pedal buried in the floor. I then let off the gas just slightly and the car shifts into fourth. By this time fourth gear has about zero torgue. Not only that, Im neck and neck with the Supercharged Cobalts. I know every one will be like, "show a video or pictures." The only pics I might put up are the ones of the engine build. Maybe a few here or there so I can show off my fabulous bowtie. Maybe next time there is meet or a ride, i'll show up. I'm actually fond of the sedans and to this day I have only seen one. I wont be racing anyone or showing off my plain looking engine. I probably wont even get out of the car. But Im sure that my 70 Chevelle SS copycat will turn some heads. I'm interested in the rare Cobalts, regardless of the setup. Thats why I still come to this site even though a lot of people on here are just plain *********. This site by far has the most unigue Cobalts.

 

D0 not buy jbp cams. I did. Never got them over the course of 4 months. Then lost $60 on my refund. Dont do it

Turbo!!

 

Well, I dont plan on hitting any walls. I'll leave that to those who can't drive. Since I actually do know how to race and hit my brake, ill tell you what torgue really is.

Torgue is when your 305 Hp 5.0 gets an upgrade from a worn out 7.5 inch rear end to a fresh 9 inch Dana LSD. Top speed remains the same but the time it takes to get to that top speed increases. Which my result in the entire back half of your car being ripped apart.

Heres another example: The car next to you is traveling the exact same speed as you, but your very slowly inching ahead. Thats torgue. And thats why I like the 2.4L, because the torgue that it does have is spread increasingly over the entire RPM range. The 2.0 is considered the superior car because it has more torgue, but the fact that car has more horsepower isnt gonna make the car top out at any speed higher than a 2.4. Now if the 2.0 was replaced with a small block 400, it might be a different story, but the 2.4 and the 2.0 aren't hardly any different from each other at all. Maybe slightly different heads or piston size or a shorter stroke. Thats why the 2.0 needed super/turbo chargers. It cant compete without them and every one knows it. I got nothing against F/I, I really don't, but real sustained torgue begins in the drivetrain. It also ends at the drivetrain. That can't be debated.


On the above post I meant to say that the time it takes to get to top speed "decreases". Figured I'd correct that before the facepalmers politicall critigue my every letter. It must be sad to be sitting in front of your computer, watching when some one is online or not, so that you can spew forth immaturity.

 

fixxed