300HP+

[ikessky]

What is it going to take to get a 2001+ 3x00 to around 300HP+? I'm already thinking forced induction of some type, but what else will I need.

[bszopi]

Even the forced induction guys aren't getting over 300hp...

[RebelGT]

Re: 300HP+

What is it going to take to get a 2001+ 3x00 to around 300HP+? I'm already thinking forced induction of some type, but what else will I need.

how much money you got?

[ikessky]

Well, I'd really like to stick with the 60 degree engines, but if they can't give me the power I need, then I may end up switching (we just won't name any names here quite yet). After all, the Century is basically the same as a Regal, and they have S/C versions running stock HP of around 240 (get where I'm going with this? ).

How off is GM from making a 60 that comes stock with ~250HP? If it is going into production soon, then I will hold off on engine mods for a while. Like I said, I want to keep it with a 60 degree engine, but I also want a mess of power.

[Anonymous]

Use a 3.4DOHC block, get the heads done, stronger pistons and whatever, and twin turbos. If you're engine is strong enough just run as much NOS as you need

[v6h.o.]

i think 300+ is doable Forced induction. just going to take alot of planning and time to do so. not that its not worth it. just as stated. you better have deep pockets.

dont even think of going that route! shame on you for thinking of that engine!

[ikessky]

Heck, I'd even settle for ~250HP.

I know I should get slapped for talking about that engine. Let me give you an idea of what is going to happen though. Once the engine starts to go in the Century, I need to pick up an engine and build it on the stand in my garage. Then I will need to pull the car in on Friday night, drop the engine (and probably PCM) in, get everything hooked up and the bugs worked out, and then drive to work on Monday morning. It is very much going to be a necessary swap, but I want more power. I don't want to go the DOHC route because I think there will be too much computer tuning issues with using my 4T65E trans. Do you guys think that an overbored 3400 with a turbo or supercharger setup would get me to my goal of 250?

[z24turbo93]

umm....yeah you might want more time then a weekend to be doing this. somethings could go wrong and prolly will when you are working on it. Also your 250 should be doable with forced induction on a 3x00. But you will most likely need some more mods then just the forced induction. TGP was 205 or 210 hp!

[ikessky]

Well, I'm thinking an overbore with stronger pistons, some head work, a new cam, ported intakes, a 62mm TB, a CAI, bigger injectors, a reprogram, headers, and a Hooker Aerochamber muffler.

BTW, what kind of power can the stock rods and crank take?

[Anonymous]

Also your 250 should be doable with forced induction on a 3x00. But you will most likely need some more mods then just the forced induction. TGP was 205 or 210 hp!

At the time the 3.1 n/a was only 140hp or so, with the turbo it was still only 205 or 210.
If we took a modern 3100 or 3400 (Call it a modern day TGP if you will), pushing 170-180hp n/a - with a turbo (or supercharger), it would be a different story.

But yes, it would still need work to handle the boost properly... 250 should definatley be realistic.

3400 n/a is 180hp, 3800 n/a is 200hp (not a huge difference)
3800 supercharged 240hp (easily boosted higher), so a 3400 with a supercharger would easily go to 250hp. Thats the way I see it anyways.

[ikessky]

Hmmm.... I should be okay then. If you figure that the N/A mods I have planned would take me to ~195, all I would really need is an extra 50 or so HP from my power adder. Should be something that a S/C and intercooler could handle.

I still need to know about the strengths of the internals though. I'm thinking that they are going to be my ultimate weak point.

[z24turbo93]

Nah your internals should hold up, however you could make them of better qaulity by getting new ones but with 250 hp slightly boost i think you will be fine. I run 8-9 psi on a na 3.1 and have had no problems

[TheProfessor]

if you want a real realiable performance motor start with a 3.1 build the hell out of it fully prt the top end from a 3400 (stay away from the 3400 itself though bad for performance applications) have some headers made go with a high volume fuel pump and you over 300 just make sure you build it to get peak hp by 6500 and if your still unhappy with it go with an rsm sc and get another 70 to 100 hp
as for the 3800 sc its a pain in the ass and then you are stuck with only being able to port the heads and pully swap as there is no room for headers

[TheProfessor]

oh and btw you should also look into haveing your tranny redone for this
a 3t40 rebuild with a bigger differential, and shift kit will hold up to anything plus you can get a stall convertor
and jet will custom program a chip for you too

[RacerX11]

3.1 with ported 3400 top end making 300 HP NA? I don't think so. And why exactly is the 3400 bad for performance applications? The extra displacement must not be good. It is not much different from a 3100, which is what you would have when you put the 3400 top end onto the 3.1 block. Except you wouldn't have a roller cam.

Marty