Just wondering what you would need to do, or how to reach this #?
is there anyone out there with 270-300hp on stock motor?

thanks

 

some of the dudes running a 2.5 with the works, exhaust, manifold, intake, injectors, additonal cooling system, and meth!

 

HPTuners, Diamond Forged 10.0:1 Pistons w/ Thermal & Teflon Coated, Siemens/Deka 60lbers, AEM Short Ram, Magnaflow Cat Back, GMPP Header, BilletFlow 2.7" Pulley, Cobra Heat Exchanger, ZZP Downpipe w/ cat, Bwoody Supercooler, Bwoody Intercooler Resivour. That is alphajaguars mods and he is at 270 or so.

 

Also consider at that power to make use of it, you will need mounts, clutch/flywheel, axles, tires, etc.

 

i agree

 

glockglade put down 275whp and 260wtq, with my Magical tune, 2.7" pulley, full exhaust, headers, no cat and intake, also he had an octane booster and 20 degrees of timing.

 

stage3 and a 50 shot.
easy way out

 

Do a blower swap!

 

wouldnt a smaller pulley do the same thing? how much psi could you possibly pound on a lsj

 

Not exactly, the stock m62 blower makes shitloads of heat!

 

on pump gas 60# injectors, 2.6" pulley, dual pass, heat exchanger, intake, header-back exhaust, headers, tranny/motor mounts & one hell of a good tune, & you can make damn close to 300whp.

 

psi is irrelivant.
cfm is what you need to worry about.

 

how is psi irrelivant

 

PSI just reflects how much pressure is built up in your intake manifold. With extremely hot air created by our M62 there will be a high psi reading but not necessarily alot of dense usable air available. Same things with flow modification; if you modify your head to flow more cfm, your boost level reading will drop because more air is being pumped through the engine. This does not have a correlation with a drop in power as the cooler/denser air flows through a better air pump you would be making more power at 15psi than a completely stock LSJ boosting 25psi.

 

so buying a completely new sc is better than investing in a better cooling system that will run for a couple of hundred bucks

 

turbo

 

Because you make PSI by pushing air into a place where it cant flow. You want better flow, not better pressure.
Plus as stated earlier, the m62 makes hella heat, and it sucks HP off the engine because its not as efficient as say, a whipple (i know thats the brand, i had a brain fart) type blower

edit...
twin screw, thats it!

Well investing in cooling here is, say a couple hundred bucks. A blower swap is a major project (right now, hopefully we'll get some kits soon)

 

so your saying that our sc's are producing the pressure but just not the greatest type of dence/cooled air? so wouldnt it be more a factor of the intercooler cooling the air and not so much the sc?

 

it could be looked at both ways.

You could have an amazing cooling system to increase the efficentcy but it would be better IMO to have a S/C that is just more effcient. AKA dual pass and whipple.

 

Well yes and no. Cooling the air will help, but that is not the only level on which our M62s lack efficiency compared to say a turbo. They also do not flow as much CFM. This is why I gave the example of the ability to flow more as well as the air charge density.

Although our roots blowers can build boost extremely quickly, it will not be able to flow as much mass of air into the engine. The main difference here being that the roots blower actually blows air into the intake manifold where it is compressed, and a twin screw let's say, compresses the air inside of itself. This alone makes it more efficient and able to flow more CFM.

 

^^^^add this to the end of my last post

 

right, i fully understand this. but the way i see it is why invest in a large project when the same hp numbers can be found on the m62 with the exception of accommdating cooling mods. unless someone planned on going over 300hp where internals would need to be upgraded and so forth, but we're talking about 270-300hp here.

 

Haha, yeah, exactly.

 

ya if you're looking for 270whp only, you can keep the M62, cooling mods, 2.6, 60's, tune and probably have the car running pretty reliably.

 

Well, did you see the other thread in this section about swapping to a turbo? For the same price as paying for a setup on the M62 that would make around 270WHP, you could make 300WHP and do it safely on a turbo setup.

As NJHK has said in the thread about returnless fuel systems; we are having to use fuel as a coolant when we take our boost over certain levels (aka levels high enough to make over 250WHP). This is because no matter what cooling modifications we make, even methanol, we end up having to use too large of injectors and too much fuel to do it safely.

As discussed in that same thread, this strains the fuel system, which then deprives cylinders of fuel. At that point you would also need to modify the fuel system to keep up.