chevysssc

iTrader: (2)

right now i have stage2 tune, 2.99, V2header, 3inch dp with cutout, 2.5 inch exhst, 3inch intake, headgames ported and polished throttle body, and a dual pass h/e. i put down 242whp with thes mods. waiting to go on is a 2.8 pulley, 60#, lightweight crank pulley, and a ported and polished head with a valve job (5-6 angle) from headgamesmotorworks.net with a nice tune. any one think 300whp is possible without n20 or meth.

SSdan

It'll be close. The head is what really helped.

chevysssc

iTrader: (2)

has anyone ever put down 300whp with stock blower and no other power adder like n2o or meth

SSdan

Yes.

2.5 pulley rings and some ***** will do it.

umrdyldo

iTrader: (1)

and cooling mods out the ass. That's really the key. I really don't see a 2.5 being kept cool enough to run that kind of power without melting the pistons up.

rallycobalt06

depending on your other cooling mods..... meth injection wouldn't be needed to hit that 300whp, esspecially because your doing a ported/polished head, that'll give you lots more power. 300whp is definately possible with the stock M62 blower, it just depends on what supporting mods you go with. IMO..... any pulley smaller than a 2.8 absolutely NEEDS meth injection. heck.... if money is an issue, you could strap on a 75 shot of nitrous and hit that 300whp.... OTTP has a dynotune nitrous kit for $400. but i understand if you'd rather stay away from nitrous.

ShortStack

I do not think you will hit 300.

Sorry dude.

06black

do you honestly think that people actually "melt" the pistons?

i sure as **** hope not, or your just as dumb as the next guy.


quick fact.

in pure strength(density) our hypereutectic's rival a forged piston, and can be pushed to HUGE power.

the reason you swap for a forged set is mostly due to to its ability to handle detonation with out braking up.

hypereutectic's are brittle, and thats there downside. hard, yet brittle.


another note, cooling mod's arnt "needed" to hit that power number altho they are a vary dam good idea.

i've been to this mark, and way beyond. and i've been there on basic mod's, years ago.

its doable, you just have to be smart. you best be able to tune with the best of them to pull it off.

your ported head is the differance maker here, depending on how half-assed they ported it, this can become more a question of "why haven't you hit 300whp yet?"

SSdan

No. You're wrong.

These guys had no cooling mods.

AIS

Interesting build and project. Personally, aside from owning a water methanol injection company, with such a build for a stock bottom end Cobalt and to do so on pump gas I wouldn't imagine not running a meth kit. While surely it can de done without the methanol. Why would you? Surely the added octane and cooling from the methanol will help keep off the onset of detonation and help keep the tops of the pistons and upper ring much cooler. Surely without a meth kit you could simply pull a bunch of timing and run it a bit rich to keep it safe and cool the cylinders. But with that your going to be giving up some power in your tune.

Don't think of methanol as a power adder like nitrous. It's not. Think of it as octane on demand as well as additional cooling. It's like having a small separate fuel system with a high octane fuel only to be used under heavy engine loads.

If you have any questions feel free to email me at rodney@alcoholinjectionsystems.com or call me directly at 801.447.2559 ext 2

Regards,
Rodney

chevysssc

iTrader: (2)

the whole point is to do it without much cooling other than a aftermarket h/e. to show 300whp is possible without a different supercharger and n2o or meth. im sure if rebelautoworx can hit 250whp with a head and intake this should be very possible.

rallycobalt06

yea man, it can be done.

06black is completely right (and he knows he is), so listen to him.

chevysssc

iTrader: (2)

thank you for your interest if the ait's become an issue you will be the first to know

Area47

you don't need a ported head to hit 300 whp. you don't need forged pistons either.

you don't have to do a 4-5-6 angle valve job on a head that has it from the factory. you don't need larger valves for the power level you're going for. just the port work itself can make or break it.

Zach06CobaltSC

To hit 300whp on the m62 takes a decent amount of work, but is very possible. The key in my opinion is the tune. Push the timing to the upper 20s, run methanol injection to keep the iat2's down and prevent detonation, run an extremely small pulley and get a happy dyno lol.

If you want to make it easier on yourself however, make sure you get all the "necessary" modifications out of the way first. Pulley, injectors, exhaust, cooling mods, etc. If you still don't reach it on your dyno, try the head work. Head work isn't always necessary to hit 300whp on a dyno, but sometimes is needed. Every dyno varies and every car varies. Just try to find out what yours likes and what it wants, and give it to it .

Blown 4-banger

Based on my airflow table before I blew up, my car was over 300 whp on stock long block. After I got my car back together, air flow indicated way over 300 whp with a built motor. 300 whp is definitely possible without nitrous.

Zach06CobaltSC

I wonder if he was asking "is it possible with my mods" because now that I look into this more, I am going to have to say no. With the stage 2 tune, I don't see him hitting 300whp.

SSdan

He won't have that tune once 60's go in.

Zach06CobaltSC

Blah, just saw he was tossing in the 60lbers. Im tired this afternoon lol. Hopefully he has a good tuner =D.

ShortStack

Dude, you gonna need ALOT more than just a heat exchanger.

Razor564

Why? People were making 300 on 2.5's and no cooling mods back in the day

But i guess your right if he is sticking with the 2.8

ShortStack

2.5 with no cooling mods is just asking for it.

Obviosuly you can run it, thats not what im saying.

Im saying youll get the most of your power with cooling mods.

Razor564

Oh yeah man definitely I wouldn't do it i thought we were talking about what he would need to just make the power

ShortStack

Lol.. Yea deffinatly man.

REally you can run anything without cooling mods, although its probly not smart, you just have to drive smart..

You dont have to be in positive boost ALL the time.. lol..

USMCFieldMP

iTrader: (1)

Aaaahhh, the quest for the Holy Grail...


"Choose wisely..."