I know we have all been hearing this and that about a potential stage 3 kit. Well it is now officially out. Go to www.crateenginedepot.com for the details. It is however an off road kit and only bumps the power up to 248hp (stage 2 is 241).

 

Those numbers are so dumb. The kit would easily put out almost 300whp with proper supporting mods but what do I know.. also, who the hell in the right mind want to up the RPM band to 8,000 rpm? Death = Floating Valves

 

I agree, but the hp numbers are strickly based on of have stages 1-3 and absolutely nothing else. But who does that??

 

if on nitrous yes but with out how do you figure a 2.9 pulley is gonna get anyone to 300 whp. I hope i misunderstood what you were saying.

 

I hope GM nows what there doing

 

it will give you 260hp on 100 octane, which is cool with me, there's a gas station not far from me that has up to 110 octane.

 

How r we going to hit 8k if gm doesnt even seel the supporting parts for it.

 

That is why it is for off-raod use only aka "buy this kit for $700 and when it blows up....**** YOU."

 

thatsone of the reason why it voides the warrenty, you have to build most of the kit with the parts supplied, also some parts dont come with the kit, so you have to buy seperate, i wanted to get the dual pass end plate but im not so sure if its worth it anymore...

 

Im talking about the pulley only doing 248HP. It's going to be a lower # then that. The Nitrous 50 shot will not really be 50HP. More like 35-40HP at most. Hope that clears it up. Also that dude that posted has a really big sig. yikes!

 

I'm not doing the whole dual pass thing either.

Just get the PCM because that is the most bad ass PCM to ever come out of the factory.

Tune for a 2.9" pulley
100 Octane tune.
Nitrous tune/armed and shot with stock buttons.

That is just sick. I'm getting the stage 3 PCM and a bigger heat exchanger. That's it.
Already have the 2.9

 

The 50 shot of nitrous will get you over the 300 HP mark. When a 50 shot hits in 2nd gear @ 3500 RPM the wheels lose traction Keep in mind you doing like 45-55 MPH at that point.

 

so if i just got the PCM, how does that work for me since im running a custom tune already?

 

Well, I don't believe it till I see a Dyno, I've not seen one person yet over the 300whp mark yet in there SS. If this stage kit can prove it then I'd be a believer.

Also, they are making the exhaust system a pre req, I sure to hell hope they don't mean installing the GM Catback. Your going to need to run something better then that and run no CAT for the higher octane. Otherwise, once that sucker gets plugged your screwed.

 

Well the stage 3 PCM is a full replacement so you can bounce between both.

Maybe run your cutom tune PCM for daily driving and throw the stage 3 PCM in for races or weekend cruises and what not.

 

Im gonna make 300whp man, I swear!

 

Well I have a 3 inch hiflow CAT. The first think I noticed was a 1-2 psi drop on boost, so that must make the whole engine flow a bit more free. Consider when people clog there cat there boost goes up.

I do need to get to the dyno. If I do it will be a 75 shot with 100 octane gas.

 

i wonder if i can load my tune in the new pcm using hpt or if that wont work, maybe hpt will crack this pcm aswell and that would be the 2.9 tune for me personally, and use the other tunes later as i build up more mods...

 

ok cool it does. thanks

 

yeah and the icing on the cake for this kit it that it disables your a/c. so i guess they are really serious about this being off road only. who the hell in there right mind would want to disable the a/c on a daily driven car for 100 octane mode+19hp and and a gain of 8hp on pump gas. i mean the dual pass intercooler plate is nice and also the adjustabe rev limit even the nitrous compadability. but seriously has gm even looked at what people are doing in the aftermarket for these cars? by the time you bought a stg2 and a stg3 for 1300. you could easily have had 60lb injectors, any tinny pulley you want, a good tune, dual pass intercooler endplate, and obiously and exhaust setup which you need either way. and make as much as 20 extra horsepower as the stg 3 off the bottle. and just about as much power as a stg3 on the bottle. only with the stg3 you have no a/c (to some it does not matter) and either way you still manage to not retain any kind of warranty at all.

also im not sure how the stg3 can provide enough fuel to support a 50 shot and a 2.9in pulley on 42lb injectors? i mean 42lb injectors really should not even support a 2.8 pulley if you care about your car. much less a 50 shot and a 2.9in pulley. lets think about this, 50 shot of spray, 2.9in pulley 42lb injectors and a rev limit set to lets say 7800 so it cuts spray at 7300 that has to be to much for the injectors to take on a regular basis. now im sure that gm engineers know far more than me about this but it just does'nt sound smart to me.

so i say congrats gm on the stg2 but you must be high to run the stg3 for more money, no ac and still no warranty i just cant see a clear advantage to running this kit. over just going aftermarket

 

I agree completely.

 

how is everyone figuring that the pulley w/ the stage 3 is a 2.9"? its a 76mm pulley, read on crateenginedepots website .........do the math its the stage 2's 3" pulley in that kit, being that ur swapping pcm's, the kit allow's u to jump from gm stage 1 to stage 3 w/o stage 2, thats their intention with that, u will not make anymore boost, than the stage 2 provided (15psi)......................crateenginedepot does offer the pcm by itself if u want to go that route but u better upgrade ur valvetrain.....ur bottom end can support 8k but if u have mods beyond the stage 2 then u should get forged pistons....and what the instructions in the stage 3 suggest is a good flowing exhaust which if ur pushing anything over stock (12psi) then u would want one ne ways.........................

 

It's a 76mm pulley, which is 2.9921 inches, in the Stage 3. Not a 2.9 inch. That's probably where the extra fuel comes from.

Ian

 

And I believe the Stage 2 is 77.9mm, which is 3.0669 inches.

Also, the install instructions specifically state that you should get Neutral balance shafts and high-speed Valve springs for RPM settings over 7000.

Ian

 

Also: Remember that the help guide states that STAGE 3 REQUIRES 93 OCTANE (Not 91 octane like Stage 2). As indicated here

Just trying to clarify.

Ian