Coba

Just checking in. I have a 2008 2.4 5speed. Owned for a little over two years. It is my second cobalt. I had an ls auto before, just always really liked these cars. Probably should have gotten the lnf turbo a couple years ago. But i think the 2.4 is capable of enough power to make a good daily driven street car. I like the low torque for a na I4. Have a time slip before tune running 15.1 @ 92mph with 2.1 60ft at milan. so i can drive pretty well

ZZP full 2.5" exhaust(cat, resonator, muffler)nice and deep
GM Performance intake (modified snorkel)
ZZP tune 182Whp 188Whp wcf 93octane (shell only, no added ethanol)
Video of dynotune at zzp
Anyway glad i finally joined the community.
Cheers

Snail_SS

iTrader: (3)

Welcome!!!

Coba

Thanks bud, really like those enkei m52's. Wish i would have gotten them when i ordered mine from tire rack. For $400 i couldnt pass these up. need coilsovers a reeal bad lol #truckstance

How much power do you make at 23psi?
LE5's can only dream

Snail_SS

iTrader: (3)

Thanks i love my m52 i like some other enkei wheels but they where out of the price range so i got those. I have never dynoed the car lol but im thinking based on mods and from what ive seen probably around 300+

Slowbalt2000

iTrader: (1)

Le5s take boost well. If it has forged rods that is. 05- early 07 have the forged goodies.

Slowbalt2000

iTrader: (1)

Ah you have a 2008 :/

bmartz1991

iTrader: (35)

Welcome to the forum!

Coba

(Edit: accidentally had two of the same quote, still new )
Ah nice a great car for sure. I guess an LE5 "could" make 3-400. But in my case i would need a 06-07 motor swap or forge my own. Even then i hear the block has a casting issue where it cant hold more than 400ish whp. With out cracking the cooling jacket supposedly :/ at least thats what iv picked up on??? So we will see what i get into in the spring

Also, when i added the full exhaust my car did not run right. So i scheduled a dyno at zzp, and NEEDED it. Turns out my car was leaning out to 21 AFR!! between 3-4,500rpm. So glad i got it taken care of.. I can make my graphs and time slips available if anyone wants.

Yeah i have heard about my powdered metal connecting rods. But i was able to find a nice 06 60k miles LE5 with the forged steel connecting rods for $650 down at my local salvage yard. So i may end up going that route eventually Mine needs more low first, like yours. Looks great man. Luckily i havent done any engine mods yet. So makes it easy to get the swap going if i decide to go that route for the peace of mine.

Thanks, glad to be here finally

Slowbalt2000

iTrader: (1)

The motor swap is pretty easy. I got an 07 le5 with 42k miles for less than 500 at a junkyard near kalamazoo.

Coba

Nice, seems like a great deal. Above i mentioned the weakness in the block on the LE5(w/ 3-400ish whp). You have been here much longer than me. Ever seen anybody actually run into this issue/destroy anyones build?

Slowbalt2000

iTrader: (1)

Well yeah its an open deck block so the top of the sleeves will go with too much cylinder pressure. Then gen2 is the same as an lnf block but im not sure that ours being a bigger bore makes them any weaker. I know km043 has a stock lnf bottom end approching 500whp, if that tells you anything. Really with a production block its just luck of the draw but i wouldnt worry too much about it.

Coba

Thats a good way to put. Thanks for the experience. I heard hauhn racecraft had used some kind of head spacer to lower the compression in the past. Would that help with the cylinder pressure when running high boost? Because i dont think it really makes sense to do a rebuild to lower the compression. The components would be far more capable than the motor. Plus not budget friendly.. Also from experience what hp does the LE5 stroker crank hold? If the lnf has essentially the same block except bore. Does that mean i could swap in a f35?? I know the fly wheel is different but would it work on a f35? Cheers

Slowbalt2000

iTrader: (1)

If your car is a manual stick with the f23. Its a good trans and will hold plenty of power. Plus theyre way cheaper if you somehow were to break one. Ive never heard of a head spacer but that just sounds like a bunch of issues waiting to happen. Do you plan on making well over 400? If not i wouldnt worry about lowering compression. Another solution to this is to just get a bigger turbo, as you can flow more air with less boost. The crank holds well over 600hp. No problems there.

tuned08ss

Welcome and nice numbers for n/a

Mr Mall Cop

iTrader: (1)

Welcome to Cobalt land.

Coba

Its one of those things that when i do the build. I want to throw everything the best at it. As well eliminate the possibility of being stuck at a certain point because of the lack of a component. Im guessing almost everyone always wants to be faster after they get used to a certain performance level. I just dont want to get stuck. I also dont want to blow up the block. Which seems to be the most limiting factor. Anywhere from 4-600 would be an ideal "end" goal. With a boost controller you can adjust power level easily. So i could turn it way down for street use. Maybe even just buy a second beater car. Dont see how i would ever want more than 5-600whp. That would be unreal.. I understand there are tons of supporting mods needed. But im not scared, i can learn correctly. I know theres some great advice on here. Not afraid to spend some good money on it. If i were to change cars it would be even more expensive. Plus i like fwd tuners. When they spin they still go straight Would be mostly drag racing use @ milan.
I drove a 400ish whp srt4 and fell in love
Good info again, thanks



Hey, thanks man. I really think it turned out so well because of the new shell 93 nitro+ gas i have being running. I was told it doesnt have any ethanol in it. Dont hold me to that. Need to do more research on the fuel. Was told that by a worker @ shell.

Coba

Thanks bill. Seems like an even more capable platform than what i had originally thought. Will see what i get into in the spring.

Slowbalt2000

iTrader: (1)

Most "400whp" srt4s are much lower than 400hp haha. But more power to you op. Sounds like youre on the right track.

Coba

haha, yeah it may not have being a full 400whp because stock turbo. But i know for a fact he had eagle 600hp rods, he actually raised the compression. Crower stage 2 cams. Reeeal nice lope. Pretty much the best sounding four cylinder i have ever heard. He had all his supporting mods done. Saw the gauge at 19lbs on stock turbo. The reason he rebuilt was because he ran too much boost on the stock fuel system. Leaned it out and blew it up. All he needs is a nice big turbo to really start having some fun. The car got to 130 reeeal fast though.. Honestly i kinda want one lol those motors are stout.

When you get a chance check out my thread about the possibility of using an LCV gen 3 block as a swap for the LE5. Am curious what youll come up with.

Slowbalt2000

iTrader: (1)

I would just use an LAF(i think) block. Its the same design "gen3" ecotec and a gen2, gen4(lcv) is a different family of motors. You want something out of a ~2011 chevy equinox.

Slowbalt2000

iTrader: (1)

And theres absolutely no way a stock turbo srt makes 400. 300 yes

Coba

Are you sure? Could you send my a link to where you saw the lcv is a gen 4?? The other guy in the other thread said that the le5 everything would work on the lcv.

Coba

yeah.. he may have over exaggerated a bit. That car was sick though lol

It says gen 3 here.

https://en.wikipedia.org/wiki/GM_Ecotec_engine#2.5

Slowbalt2000

iTrader: (1)

Wikipedia classifies them differently. We seperate gen3 from gen4 because gen3 is actually the same block design as gen1 and gen2 minus the sleeve supports, but everything else is the same.

We call gen4s, gen4s because they have a flipped cylinder head and different balance shaft mounting amongst other things.

Not the same block design as a 1,2, or 3

Coba

I have being pretty sick for the last couple days.

Anyway, i looked up the LAF block. It seems to be direct injection as well. So wouldnt it suffer from the same issues of being flipped 180 from the gen2 blocks? Everything backwards