xx SiLVER xx x

im a noob. i have a (stock) 2002 silver ws6. i have a pretty conservative goal of 450 hp on motor alone. no power adders.

so in yalls opinion, whats the quickest way to get a stock ls1 to 450hp, without power adders?

z28_YOU_HO

iTrader: (7)

H/c/i

Pntbll309

iTrader: (33)

I wouldnt say conservative is 450rwhp. But your not going to be able to do it fast or cheap. Your gonna have to do a pretty nice cam, heads and intake.

MonochromeSS

iTrader: (1)

Without power adders your only real choice is HCI. And its going to need a pretty big cam to get you there.

unit213

There's nothing too conservative about making 450rwhp N/A with a 346cid LS1.
It will cost you many thousands of dollars to do it right.

...OR...you could spend $500 bucks and get there easily with nitrous.

junior28570

iTrader: (22)

If you have an M6, there are several proven H/C packages (with bolt-ons) out there.

Break the wallet out $$ !

unit213

To answer your question directly, you're going to need some
variation of the following mods:

• heads
• an aggressive cam
• intake
• pushrods
• full exhaust
• clutch (if you have a T-56)
• sticky tires to hook 450rwhp
• a 12 bolt or a 9" rear end to hold the 450rwhp with your stick tires
• a good tune (along with some colder plugs)

There's a lot of misc mods that you'll end up doing as well to support
the new power (such as a stall converter if you have a 4L60E trans).

If you're new to modifying cars or to the LSx platform in general, I suggest
going a lot of homework here and researching each individual topic. There
is a wealth of knowledge at your fingertips...just hit the search button.

You could also contact one of our sponsors that is located near you. They'll
be able to steer you in the right direction if you needs parts or installation.

DD966

iTrader: (3)

I thought the same way. No power adders. $3000 later I unhappily had 375 rwhp. My advise is to soul search exactly why you want 450hp. If you keep your foot off it Superchargers do not affect your gas mileage, and you have the power at all times. If you are looking for track times, or an occasional street race, nirous is great, and our cars can handle quite a lot. An extreme H/C/I package that nets you 450rwhp will be less streetable as well, but it sure will sound nasty!

Gordon0652

iTrader: (4)

Ported ETP GIII 215, nice size cam, FAST 92mm, and a 12:1cr & all the little extras that will add up power and $$$$$.

Prerun4fun13

iTrader: (6)

Is the car a M6 or A4? For 450RWHP i would go with AFR 205s milled to 59cc then give them to Tony Mamo and have him port them, Then fast 90/90 ported by Tony Mamo and a custom cam from Patrick G and a really good exhaust.

EndlessSummer85

This should make some good reading for ya!!!
https://ls1tech.com/forums/showthrea...light=500+rwhp

PewterScreaminMach

iTrader: (7)

Yeah, I agree with everyone else. 450 NA on a 346 is definitely not conservative, but it's doable with a high quality (properly chosen) heads/cam/intake setup with all the supporting bolt-ons (full exhaust with long tubes, pulley, etc, etc).

If you can do the work yourself, you'll definitely save a TON of money, but you're still talking many thousands of dollars. A quality set of heads alone with run you $2000-2500 or so.

All that said, it's absolutely doable if you have the money. Start reading up in the stickies.

Detoxx03

iTrader: (14)

It can be easily acheived if you have the moola. I wouldn't say that you need a big cam to get there but definitely no a small one. I putting down 414rwhp with bolt ons, stall, and a cam. When I get my afr's I will easily be at or over 450rwhp. My car is very street friendly btw.

xx SiLVER xx x

wow. i reread all yur posts, and all the related threads that a few of you suggested. thank you. that was very informative. after a little consideration, i think i will readjust my sights. and set a new goal of 400rwhp.

and for starters i think im gonna get a full exhaust.
my buddy and i are kinda competeing now.

im gonna order long tubes, and an x pipe, and some bullet mufflers. do you guys think that a full exhaust would make much of a difference on a stock car?

could u guys suggest some quality brand names?

dshag

iTrader: (1)

bolt ons, a healthy cam 230/232 111+3 lsa has gotten people to around 420 RWHP, pick up some heads good matched heads and your there...

SOM02WS6

450 isn't that high of a goal. I think it is perfectly do able. I was making 420 on a cam, with ported 241's and full bolt on's and I DD it.... It was an M6 which will help with DD but it was fine......You could hit 400 with just bolt on's and a cam.....

Pipelayaz

iTrader: (2)

450 isn't hard to make and it can be very streetable as well. There's people here that are well above that goal. I've seen individuals make 450 with a ls6 intake and stock ported TB on a mild cam. You just have to choose your parts wisely. And the cam doesn't have to be rediculous like an MS3 for instance. Stickies are your friend and pull up every post/thread in relation to your goal. Thats what I've been doing.

Detoxx03

iTrader: (14)

Don't change your goal. If you want 450rwhp do it cause its not hard. Like myself an a couple others said with bolt ons and a cam you can get around 420 so with heads you get 450 and up. I run qtp headers with a custom y-pipe and a lm2 exhaust with a borla xr1 bullet muffler.

WS6addiction

iTrader: (1)

I saw a post from someone here running a TR224, AFR 205s and a fast 90/90 that made 446rwhp. It's definatly doable with the right combo.

Benjamin Russick

iTrader: (1)

400rwhp is easy with a cam and bolt-ons. You could always add the heads later...