Gotcha. Both of my lsjs dynoed around 200 bone stock. So yeah only picking up 22hp from stage 2 doesnt really seem right to me. Like i said I've only had my car tuned by 1 person and thats roshan from rpm i know he doesnt have exp in cobalts so im guessing its the tune thats not dialed in to its potential. But to put things in perspective I ran neck and neck with an ls1 gto from a 40 to 105 roll his mods were intake and exhaust (sounded mean!) so im thinking it could also just be the dyno giving me inaccurate numbers?

 

Just going to point out that there is nothing wrong with specter filters. They are actually pretty good.

 

I thought so also, and for the price you cant beat it.

 

Didn't read all the posts so i apologize is i post something that's been touched on already...

60#s are nice, but a pain to tune for, i would recommend putting in some 50#s that are offered by ZZP. 50#s CANNOT be maxed out on the M62 so that would be ideal if you are looking to save a little cash. In addition, COOLING mods are what really help squeeze all the power you got tucked away SAFELY. Last thing you want is to blow her up because she got a little too hot under the hood. Meth would be the best bang for your buck, kits are cheap, easy to install and not as harmful as nitrous so long as you know where to inject it and how to tune for it. The most common place for meth injection is right after the throttle body by using an adapter or spacer with meth ports. This is easiest because not a whole lot of work involved and its easy access. PROBLEM with this setup is the Meth is harmful to the Teflon coating on the blowers rotating parts. IMHO the best placement is under the blower housing, which is achieved with the Supercharger to Intake Manifold Spacer with optional Meth ports, also available through ZZP.Obviously this method is a little more involved but is SAFEST overall. If you are not Duel Passed then you should definitely consider it while you are doing the above, also Phenolic spacer as well. REMEMBER when petting all these spacers on the belt tension is going to increase, so to remedy this use ZZP's adjustable belt tensioner bracket. Now you got her cooled down and you find a decent tuner and he make you pull 300+, but you wand a little more... many people will say no, but i run this setup and saw instant power gain and WAYYYY faster revs; Lightened flywheel. I personally use the ACT Prolight Flywheel and GM Clutch upgrade. Acceleration is improved Revs are way faster and you can spin the tires till it burrows a hole to China. Also need to look into Exhaust upgrades start small and buy piece by piece if you need to but slap it on all at once and get retuned. Tuning and Cooling are Key. After every mod you should datalog retune to really notice changes.

Hope this helps you get the power you are looking for.

 

Holy crap! Haha deff a nice writeup but I just intend on sticking with the 2.9 im going to the army soon so the car will just be sitting anyway and i think ill be happy will the power i make when I get a good tune. 250 whp is my goal and i will be content with that esp in a pretty lightweight car. But I have not seen 50lb injectors inna while i was just on zzp's site and could not find them? Anyways im going to get tuned at the NJ tune meet on the 16th by jeremy and his buddy i hope everything will be good after that

 

We can discuss future mods when I come down and what we have seen work and what we have seen doesn't. Just to give you an idea of what I am running:

2.8 pulley, 60# injectors (no idle issues at all from a perfect tune), Dual pass, Phenolic spacer, ZZP Long tube header with cat and ZZP 2.5in Cat back.

I plan on running a heat exchanger and meth next year and call it quits for engine performance while I build up the suspension stuff ( koni shocks, YYZ springs, sway bar, PF01s and some nice Nitto's)

 

That's pretty much what i want to do but keep it at 2.9. My suspension has seen better day's and I want to beef it up.

 

I found the dyno sheet, it has afr readings and all i just cant read it, im a noob to dyno's. How do I post pics? maybe you guys can tell me if you see something wrong

 

usually the afr is at the bottom of the chart...the scale should be on the right side...

 

Ok looks like the afr is right about 11.7 at wot i still wana post the sheet so you guys can confirm that it stops making power extremely early. How do i post it??

 

the only way i see 290 is a smaller pully and e

for 1 the main reason for cooling mods is to speed up recovery time there are people making alot of power with out them the intake manifold was designed to support 250 hp tops if you want the best possable iat2 then spray it you will sub ambiant iat2 temps and n2o is about as harmfull as water/meth kit either way the you decide to go the reliability is going to be in the hands of the tuner

you are not going to make over 300hp on pump gas and meth on a m62 unless you put in a set of cams or spray it or get a way better fuel source then 93octane such as e85

 

11.7 is fine along as ur iat2s dont go crazy high 150+
did u check a see if ur ic pump is working. that could cause power loss. turn ur car on don't start it and take the cap off the ic and see if the water is moving.

scan the sheet in or take a picture of it and upload it on photo bucket and past the link in the thread.

 

all u have to do is change the timing table mainly to run a 2.9 and 42s
gm s2 base tune and mod the timing for the higher boost...i have a friend that successfully ran a 2.9 with the gm s2 tune with no kr.. think he made 256 whp..
the gm s3 uses 42s and leaves room for a dry 50 shot of nos safely..so i would think the 42s will easily handle the 2.9...
like i said i ran a 2.8 and a dry 50 shot on 42s....if a 2.9 is the smallest ur going to go i would keep the 42s and spend the money on another mod.

 

Thanks for your help guys! And yeah 2.9 is about as long as im comfortable going, just a personal preference ya know? But ill make a photobucket account and post the sheet for you guys.

 

Investors provide money, which lets you buy more fun stuff.

Anyways, I think you meant injectors. They provide more power in this case by making it so you have more fuel. The IDC of the 42's is already high as hell on the Stage 2 and Stage 3 setups (Stage 3 is a hair under 3 inch).

 

I understand...but the point here is that the 42s can handle a 2.9 on a m62 with out a problem. Isn't a afr of 11.7 (for example) the same from any injector as long as it doesn't go static?
My point is that changing injectors won't make u more power if the ones u have aren't getting to 100% idc. Staying under 90% would be better but wen I ran a 2.8 and nos on my 42s I hit 98% idc at 7500rpm.
Now I'm running 60s and a 2.8 on e85 and nos and my injectors go static after 7750 rpm.

 

I made a photobucket just for this haha lmk if the link works boys!

http://s1148.photobucket.com/albums/...t=433d3e6b.jpg

 

hmm my cobalt made 236 gm s2, bone stock

 

 

this is bone stock besides gms2

 

ughhhh dammit! Those are great number for you esp your torque! I really think something is wrong with my car, i hope jeremy and Gremlin can get all the bugs worked out......

 

 

Lol

 

this....Also, Nick up at BYT is an excellent tuner but unreliable at times.