sowaidi

iTrader: (5)

i got the lq4 6.0 with a turbo at 6 psi right now, i havent dynoed it but im planning to get close to 600hp but i wouldnt know if the stock lq4 could take that? what is the limit on boost on these motors?

elias_799

iTrader: (8)

make sure you have a very good tuner and some meth

sowaidi

iTrader: (5)

i got meth but would the lq4 go up to 600 hp lelaving it all stock except for a small turbo cam? would 12 psi get you over 500? they should get over 400hp on 6 psi if im not mistaken

67maro

From what I have red alot of people who run a basic turbo setup (t70) break 600whp at this mark. I think Parishs buddy is looking to go into the 8's with a stock long block with a ls6 cam but dont qoute me on that. So depending on your turbo Id say you should be there.

98Z28CobraKiller

iTrader: (17)

You may need a little more than 12 psi to break 600 rwhp. I think that I was around 750 when mine popped. It was bone stock though. I think that one of the stock rod bolts let go but I haven't pulled it apart yet to be sure.

I would love to see that but I doubt that the stock pistons could take that.

hellbents10

iTrader: (10)

With good fuel and tuning the stock rods are the limiting factor. Pre 05's are good for about 800fwhp and the lq9's and 05' newer engines are good for 900fwhp or a little more. Afer that the rods bend/break. If the fuel is not good enough or the tuning is not on they all break shortly after 500hp though.

1320

iTrader: (6)

This is way more tune/rpm and user related the hp.

Mostly tune.....but if you monitor knock and dont spin the crap out of it, it will live a long happy life.

98Z28CobraKiller

iTrader: (17)

Read this

https://ls1tech.com/forums/forced-in...ld-w-pics.html

Vcious04

iTrader: (16)

If the engine is 100% stock, with a T70 (front mounted), supporting fuel mods and such I would say 12-14psi is what it would take to hit 600whp witha 6speed.

I am planning on 600+ on 8lbs and 700+ on 12lbs (Yes, I will test it to it's max), but my 6.0 has a custom cam, arp rod bolts, springs, pushrods, timing chain, pump and such. Also I am using the MPT76 with a Q-Trim wheel and 1.00 housing.

Remember, a LS6 cam or boost cam can yield as much as 100rwhp with no other mods and the same boost level. Search it...

98Z28CobraKiller - I think you would have easily hit the 9.xx with just a cam swap.

sowaidi

iTrader: (5)

i dont beat the hell out of her. just a few pushes on the road, nothing that i think would hurt, say raising it to 14 psi w/meth with a real good tune would do the trick? its got the cam, springs and pushrods, are there any minor things i could change to help the motor?

98Z28CobraKiller

iTrader: (17)

drop the pan and replace the rod bolts.

98Z28CobraKiller

iTrader: (17)

The new cam will be in the new forged bottom end currently at the machine shop.

I would have ran the 9 if I wouldn't have chunked the plug just after the 1/8th mile on that last pass in the video.

craig382ci

iTrader: (5)

What about the compression? I was told with the stock compression it was not safe to run over 8psi. That you needed to lower the compression to run higher boost and a good fuel setup.

kbracing96

iTrader: (25)

Yep, I have to agree here. Stock48 pushed his to the point of destruction and the rods where the week link. Tune was right on, AFR was low 11's and never detonated, just bent and broke the rods in the mid 800 RWHP level. His setup was a pre-05 stock bottom end 6l with hand ported heads and a TC 76 turbo with .96 a/r. Put his 4900lbs 4x4 truck into the mid to lower 10's and upper 120's in the 1/4.

NemeSS

iTrader: (127)

a stock lq4 is 9.4:1
it can handle 10+psi on pump with a correct tune and sufficient fuel system