black06ss

yeah i wasnt sure on exactly what you meant. and i think im more concerned about making power not boost.

Asphalt Assault

if you want to make power and not boost then you should think about pistons, then cams, and HP TUNERS. after you have done all that then you can do something about boost to make HP.

Your statement contrdicts itself. YOu want a whipple to make HP but not boost? it has to boost to make HP for you cause that is what it does. Hope I have helped you in planning your engine. Pistons are good for about 30HP and you are very safe for the future. you have a motor that you can tweak up to 600HP with head work and boost. no other way to get that kind of power. Exhaust and intake is just a matter of free flowing the engine. those dont make hp. it allows the motor to produce more.

Bad06SS

iTrader: (1)

The whipple flows 997cfm, I remember reading that that's about 500 cfm more than our stock blower. I don't believe they use a throttle body when testing cfm, I believe they just put the blower on a flowbench and test-I could be wrong. Max rpm for the Gen V M62 is 16,000rpms, the max for the whipple 100ax is 18,000 rpms.


HERE IS A THREAD THAT NEEDS TO BE READ:
https://www.cobaltss.net/forums/show...ht=blower+swap


Keep in mind, the whipple in that thread is the old whipple, the new 100AX is the 1.6 liter blower I'm talking about. Also, he's talking about the Gen 4 M62 and M90, we have the Gen V-but it gets the idea across.PLEASE read that thread! I hope this helps.

Cobalt_Supercharged

A Whipple W75AX is good for 22 PSI with a 3" pulley. It maxes out at 20,000 RPM with a max of 35 PSI, but would require a 2.1" pulley to reach that (physically impossible if I'm not mistaken). It's physically smaller than the M62.

I tried talking to Whipple, but they would tell me noting more than "That will not be out for several months".

I'm talking with another company that makes the cores for Whipple and Kenne Bell. Unfortunatly Whipple either does something to their units or rates them to higher RPM and PSI ratings than the original manufacturer.

I'm currently prototyping an intake setup that would allow us to still use all the intakes currently out for the Cobalt/RL.

I really haven't looked at the W100AX. I know that it is physically larger than the M62, but not sure if it will fit under the hood while on the stock intake manifold.

Sempher55

i dont care about the blower... i care about my engine.

glockglade

to run 25 pounds of boost you need only replace the pistons nothing else will blow the whole engine is forged anybody with the builbook what is the failure rate for the engine with replaced pistons? I am seriously interested in this modification.

Bad06SS

iTrader: (1)

I have the build book laying around somewhere. I remember reading that besides pistons and valve springs, everything else should be good to ~600hp.

zinner

Doesn't the whipple require more up keep because the tolerances between the rotor and the housing are so tight? It's definetly going to make more power, but I think it's going to be a mod that will require rebuilds in the future. Just something to consider.

Bad06SS

iTrader: (1)

Haven't heard that, but I'll look into that. Thanks for the advice.

Cobalt_Supercharged

I'm not sure on the tolerance of the twinscrew vs. roots.

According to Stiegemeier: "When new an Eaton has .0025 rotor to case clearance. (.0025 is equal to the thickness of a piece of paper.)"

That's pretty tight if you ask me. I would hate to see the tolerance of a twinscrew if it was tighter than that.

03gobluecobra

A whipple would not run under constant boost. On cobra's, the whipple works exactly like the stock blower, only because it is twin screw not roots it is more efficient. You get vacuum just like on a normal car. You can spin it faster and not create as much heat, therefore you can make much more power.

I don't think it matters what size pulley you need to create what boost level. That's really irrelevant in the big picture.

What might matter is how long that blower snout is. It looks longer than our eaton snout, which means it wouldn't line up with our belt, and it just wouldn't fit without a new snout, which I think is expensive.

A whipple doesn't require much additional upkeep over the eaton. It just requires you to add some oil to the blower every now and then, which you can just pour in. All that extra power though will require extra attention to the rest of your car, especially in regard to clutch, tires, tuning, halfshafts, etc.

StreetDreamz

Go turbo.

GT42R or PSC61.

It will be cheaper, more powerful, and cooler sounding.

Bad06SS

iTrader: (1)

No, I am not a fan of turbo's. I HATE lag. I want instant power and torque. Besides EVERYONE has a turbo. I'd like to be different.

03gobluecobra, in regards to your pulley size comment, I'll have to disagree. In the link I posted above, you see how much power it takes to spin a smaller pulley. If I can make the same boost with a much bigger pulley, I would free up quite a bit of power due to less parasitic loss. However, the less heat benefits interest me more.

03gobluecobra

Well, the size of the pulley isn't exactly what takes the power away. The gears inside the whipple snout multiply the RPM's, and that final spin rate of the rotors is what takes away the power. A blower with a bigger displacement will push more air with less RPM's, so it can make more power with less RPM's. What really matters is how fast you need to spin the rotors to achieve whatever power level you want, and that will be less with a whipple than eaton.

Bad06SS

iTrader: (1)

True, good point. I see what you mean by the "bigger picture". Thanks for the input.

senior_brown

heck if someone comes out with a kit for the M62 on the 2.4 PLEASE SIGN ME UP!!!

StreetDreamz

**** man you need a manifold, belt, tensioner, plugs, and a tune.

CTCOBALTSSS

Whipple is the shiznit. That would be a sick swap. I hope something productive comes out of this thread.

Bad06SS

iTrader: (1)

Huh? Why would I need a manifold? The plugs and a tune aren't a problem, and the belt and tensioner I'm using will work just fine. Like I said, 2 adapters. An adapter to mate the outlet of the whipple to the stock manifold, and an adapter to mate the throttle body to the whipple. I don't know where you're getting the idea that you need a new belt and tensioner. Even so, a belt and tensioner is cheap, you're not talking about re plumbing everything like you'd have to do to go turbo.

patathSS

I think he was talking to the guy with the 2.4.

Bad06SS

iTrader: (1)

Oh, gotcha. Thanks Pat Sorry streetdreamz, I misunderstood.

Cobalt_Supercharged

The current problem I'm haveing is lining up the S/C so that the bolts for the plate don't interfere with the stock bolts. When they don't interfere, the S/C ends up sitting over the opening for the bypass valve and leaving no room to hook it up. I think I might have the fix though.

I'm using the 1.2L. The 1.6L and 2.3L S/C's are wider and longer making them very close to the fuel rail and covering the bypass opening even more. The 1.6L might be usable after some serious motor work and even more intensive work will be needed to use the 2.3L assuming you can make them fit. If you are going that far with it, I would assume you would also go with a custom I/C and intake manifold so it could be possible.

All the above is not even considering the clearance for the pulley. I know I am cutting it close with the 1.2L and a 3.1" pulley.

Blown 4-banger

All we need are those diamond forged pistons and a new head gasket and hello 30 psi and 400+ whp!

Cobalt_Supercharged

Which should be achievable with a Whipple 1.2L.

SchwarzCamaroRS

oohhh... lol, wouldnt that be nice... a street legal, SINGLECHARGED, SC'd 2.0L that would run low 11's... while still getting 20-25mpg... Lets get this show on the road!!! ill pay 3-3.5k for 400whp...