300HP+

[Guest]

ok, im confused. What 60V6 is already supercharged?

I was wondering the same.

[GPXSS]

is the 3800 not a 60v6?

[nocutt]

To obtain 300hp from a 3x00, say a 3400 with 9.5:1 compression ratio you will need about 9psi IC'd. "In theory" you will need about 400-430CFMs to keep 1.61PR. That works out to 29-30 lb of Air/min or 290-300hp, since we are dealing with a 200ci motor, ft/ lb TQ will be in the 270-290 range. Compressor efficiency and intercooler efficiency are very important, they must be over 75% respectively, especially at that PR, to avoid problems associated with flow...(this is just an overview)
BTW with 6-7 psi, "in theory" with that kind of CR, you are looking at about 80-100HP everything remaing equal...TQ however will still be affected due to the displacement and PR...Don't compare any other FI setup to a properly setup turbo...PK power on any other setup even a turbo is really WORTHLESS...the graph of the tq/hp plotted against RPM gives a much better picture

[SappySE107]

its been done, so I sure hope its possible:P

[Manitcor]

its very achieveable

this is 4psi intercooled on a 3100 with stock internals and 3inch exhaust:



On a 3400 with more boost it shouldnt be a problem at all to reach 300hp

[3100GAGT]

Get a Vortech supercharger from www.rsmracing.com it runs 8 psi and will give you 80HP and you dont have to worry about the heat or the piping of a turbo!
with a couple of modds 300 HP no problem. Exhaust, TB, ported intake manifold.
heads would help a lot if you want o spend a grand or have some done. With these parts about $6,500 I say 300 HP no problem. the supercharger cost $4,600 it self.


If you spend about 15 grand or more it will decimate all . JP if u got it

[3100GAGT]

o www.doctorspeed.com has TB, PP intake manifold, and PP heads just to let you know good luck

[SappySE107]

What a complete waste of cash! You can do a turbo setup for much less than RSMs outrageously priced SC. Doctorspeed, another overpriced company, and their product descriptions show how much they dont know. PM me if you want to know what im talking about...I dont want to devote any more time to either of those companies, especially RSM.

[nocutt]

Why would a "normal" person spend do much for a SC setup on a ~200 ci motor is beyond me...get a turbo and stay true to the 3x00 character

[3100GAGT]

who would you suggest using to get parts

prsonaly i rather have a vortech supercharger but watever you want to do.

[ikessky]

I would much rather do a turbo than a supercharger.

I agree with Ben. Let's not waste time talking about over priced companies any more. I'm going to be doing the majority of the work myself to keep costs low. I don't know about you, but I enjoy doing this type of work and I don't have a ton of extra cash just lying around the house. I will be giving the intakes and heads a backyard P&P and will probably get some valve work done on the heads. As for the TB, I already know where I'm going for a brand new 62mm unit. No cheap bored out stock unit for me!

I pretty much have everything planned out already. Now all I need to do is pick up some side work to fuel this monster!

[Manitcor]

with proper planning you can pull off a fairly cheap turbo kit to run between 4 and 8psi.

Do some digging in a junkyard and you can most likley rip a turbo off a wrecked car, Volvos, GNs, RX7s, ect. You will prob have to have it rebuilt but that can be done for about $300

If you dont want to do turbo headers you can use your stock manifolds (though I would reccomend at least having them ported) and just have a custom crossover made to mount the turbo too.

Ballpark I would say you could do a low boost setup without an intercooler for about $1500 or so depending on your hookups and how much work you do yourself.

Add in an intercooler and other goodies and you can go for higer boost at a higher cost of course.

[nocutt]

...As for the TB, I already know where I'm going for a brand new 62mm unit. No cheap bored out stock unit for me...!

You don't need that big of a TB, especially when running low to mild boost...put the money somewhere else...

[ikessky]

If a NA 3x00 can benefit from a bigger TB, why wouldn't a forced induction engine? No offense, but I think that I will need it if I'm looking for 300+HP. Besides, why should I pay the same amount for a stupid bored out unit? I can do that crap at home and yield no gains.

[bszopi]

The benefits of the larger bore can be argued from many different points of view. Some say that the stock size is plenty for modded engines. But you have to think that GM bumped up TB size 4mm for a slightly larger displacement (the 3400). Therefore, with a forced induction setup, it would make sense (from that perspective) that a larger bore would be of benefit. But unless you actually get into calculating true amounts of airflow into and out of the system, you can't make a truly reasonable judgement. Personally, I don't think you can ever get too much air into the engine. A larger bore will just allow the CC to fill up sooner, or with less throttle. In the end, its not going to hurt...