i saw a video of a black auto 2.4l with a stock m62 off a 2.0 ss/sc, and put down
246whp. i was just wondering, i think im going that same route. except, instead
of all stock i/h/e i wanna go aftermarket. im looking at the Ark GRIP cat back,
a hi flow cat, pacesetter LSJ header, and [if it fits on the 2.4] the LSJ injen long
ram intake. i would like to know if 300whp on a stock LSJ m62 is possible, especially
on an autotragic car like mine. and how streetable is that? this is and will have to remain
my DD [Ohio winters as well]

 

also would like to mention this is a 2006 SS/NA, so has the powder forged goods, and would NOT like to change up anything internal wise to achieve this 300whp goal, just looking to use mods posted.

EDIT: other little mods to include would be TTR auto solid mounts, and TTR poly trans mounts.
i do have NGK irriduim stock replacements, thats about it under the hood tho

also my bad guys, 224whp after S/C

YouTube - 2.4L Cobalt SS Supercharged

 

Doubtful. Just look at how hard it was for the LSJ crowd to break 300whp on the M62. You have a displacement advantage, but you're going to have to seriously pulley down, add cooling mods, and get one hell of a tune on it.

You'd be better off looking at your turbo options at that point.

 

last I went to the dyno I only got 216whp on a mustang dyno. For some odd reason though it reads lower than other mustang dynos. At that time I had a 2.8in pulley and other mods.

 

you could get it with E85 for sure and running a 2.7 with dual pass, opt. b, and 2 H/E. im pretty sure you could do it. this is what i would have done if i didnt have a damn 08. noiw im selling the sc and sellin the car.

 

was hoping not to go turbo, i was sorta hoping that the .4 liters would help, the VVT
kicking in would help, and the higher compression of the 10.4:1 would help! would
not wanna get into something like meth and all that to cool to get these numbers,
was hoping that this could sorta just be the cheap and easy install way of reaching
my goal or 300whp! whats a realistic number for a M62 w/dual pass on 2.4 ss with
i/h/e and tune? and thats at 9psi in the video, is that stock? and anyone know what psi limit is safe on a 2.4l? i dont know much about s/c's but their psi is determinded by the pully size if im not mistaken..but curious about pulley sizes and psi!


ouch, only 216whp? i would hope i could get more than that. thats like stock ss/sc stuff almost! from what i have read, keeping my car N/A with intake, header, full exhaust and a tune will already put me at stock ss/sc times. and if the supercharger cant get me any faster than i can get N/A...idk sounds kinda pointless! i was hoping from seeing this guys 224whp, i was hoping with a super nice tune i could get 250, and then with supporting breathing mods HOPFULLY pick up another 25-50whp! and have somewhere above 250 to about 300whp!


car will be running 93 octane gas, would convert to dual pass for sure its in the plans, whats is option b? never really looked/heard of that besides a few ppl running it. and idk if i would run 2 H/E sounds like a little too much work! lol! also my friend ported the openings on his m62 and intake mani was ported as well to flow better, would this help much, if any? not looking to get head work done, but if porting the s/c and the intake mani helps, then i would consider this as well.

 

Yeah, I mean, honestly I don't think you're going to have what it takes to do it. Option B and tune I could see getting maybe up to 250whp, but I/H/E isn't going to net you more than another 20whp.

I would say 270-275 would be your very upper limit, especially since you're not looking to boost that much from what it sounds like.

 

put a tvs on there. lol

 

250 is hard enough to achieve.

ZZP, when they dyno`d their stage 1 for the LE5 used an LS4 TB, 60 pound injectors and had a full ZZP exhaust. So it breathed as good as it ever could and ňnly`put down 225. Dropping from 3.4 to 3.1 pulley they say gives 25 more HP but I havent seen any dyno numbers.

You can get 300hp, it just wont be easy or cheap.

 

im looking to boost it as much as possible on the stock m62 as i can.
but do not wanna get into secondary cooling methods or building the block
or head work to allow more hp. nor am i looking to tvs or turbo her. is the
stock pully my only option? or without extra cooling can i get a smaller
pulley on there?

 

Yup. If you don't want to go turbo and still want 300whp, that's about the only other viable option.

 

noooo thank u! tooo much $$$ for just a s/c can get the m62 kit on the cheap!



what does a stock ss/sc run pulley wise? the 3.4?

 

If you don't want to add secondary cooling, you're severely limited in how small of a pulley you can run. You can probably go down to a stage 2 pulley, but that's not nearly small enough to get anywhere near 300whp. To get to 300, you're going to need at least a 2.7 pulley, and I wouldn't run that without secondary cooling.

At 300whp you're creeping up on the range where you're going to need to start thinking about building the block. I run 345whp through my LSJ, but I run E85 for cooling. Even then, I pretty much know I'm on borrowed time.

As the saying goes:

cheap
fast
reliable

Pick two.

 

well, i mean the goal was 300.

id take anywhere between 250 and 300
as a win. but really was looking forward to
building 300whp on stock m62 as it would
have been pretty neat for sure. but dont
want a crazy expensive build!

 

Slightly smaller I think. 3.35?

 

Honestly no idea, ZZP machines their own to fit the 5 rib belts of our LE5s (LSJ has a 6 rib).

Stage 1 is 3.4 and stage 2 is 3.1

 

Stock LSJ is in fact 3.35.

 

Another thing is, after installing the 3.1 today on my SC the space between the snout and the inside of the pulley is about the width of a few pieces of paper. Any smaller and the snout would have to be machined to reduce its diameter. Just another hassle imo.

 

Don't let the numbers fool you.... with the setup I got 13.8 at the 1/4 mile

 

i am pretty confident that with the mods i said and probably some porting like you said and a ls4 TB, i think 300whp is obtainable with a good tuner and e85. i would have gone for it but i didnt feel like putting forged rods in there. (i have an 08 and i did drop my oil pan to check) but think about what mods a lsj runs to get to the 300whp mark. we have more displacement and higher compression, higher compression + boost = WIN! (or boom lol)

 

if E85 becomes more available in good ole San Antonio I'll switch. I think I'm gonna put back on the 2.8 cuz I have way to much heat soak with the 2.7

 

alright guys what about this... upgrading his cams and also getting that TTR intake manifold... I know havent really been tested but if they prove to be worth it I think 300 is possible and then add e85...but that is my opinion and I dont know much about those two products so just throwing that into the mix. but u will need to get more cooling then just what u have cause u will have to pulley down and u dont want to go over the m62 limits... I heard it was 16-18 PSI. but man seriously get urself H/E/I/e85 and with a 2.7 pulley u will enjoy the car.

 

oh and a guy on here i think gene was around 250 with a 3.0 pulley and exhaust work. so ur numbers arent off but 300 is not gonna happen with out the corn and some serious cooling mods.

 

If i was you i just be happy with the stock m62 pulley as you'll still be over 200whp. Plus your auto so your at a disadvantage from the start.

 

Love to see how you would mount that under an m62