User-c3

The same question asked manny times, I am sorry for bringing up another beaten down topic but I cant seem to find the info I am looking for.

I am thinking about getting some 6.0 heads to drop the compression. I am not sure what cam to use with them. I hear the Ls6 cam is great for these engines boosted. I would like to get above 550hp

Car is a street car running the T-56. I am just looking to do this the most cost effective way and achieve some good numbers. Input would be really helpful

HRHohio

Actually the LS9 Cam is a much better choice. You have a few other things that you need to do to switch over to the LS9 Cam, but it's worth it. I have it and I put down 551 rwhp @10 psi with stock LS1 Motor (Rear Mount Turbo T76).

See:
http://www.lingenfelter.com/LPEforum...read.php?t=502
and:
http://forum.grrrr8.net/archive/index.php/t-23278.html

Good info.

User-c3

seems like a good option, Your right a bit more to dive into though.

Would it be better to not go with the 6.0 heads and just simply upgrade the cam, maybe a LS6 or after market turbo cam with the factory LS1 heads? I do like the idea of keeping my bottom end power.

More thoughts?

User-c3

So far here is what I am thinking for a reliable some what lower cost top end. I would love to know if anyone is running a similar setup or knows if the combination will be affective.

LQ4 heads
LS6 Valve springs
LS6 cam

My thought is the LQ4 heads will drop the compression to the right levels to maintain a stock bottom end, I can get a set for right around $120. The LS6 cam seems to do really well with turbo applications and the LS6 springs would be a no brainer to run with the cam. Should I use the LQ4 valves or run different valves?

What kind of numbers could I see from this setup? Upwards of 600?

30th t/a

iTrader: (51)

I ran the 317 heads and a LS6 cam on my last twin turbo setup. I would not do it again though.
My 317 heads had the chamber's CNC'd to 79cc to drop the CR way down. I believe I was 8:7:1. That low of cr plus the LS6 cam made the car feel slugglish out of boost. The LS6 cam is weak below 4500. After 4500 it takes off. If top end power is your goal then the LS6 cam is for you.

I made 603/600 with this setup at 14psi (forged pistons & rods) 347cid, thru a 4L80e unlocked. 93 octane, no meth.

User-c3

Lets see some more numbers people have achieved with stock LS1 with the 317 heads and what cam choice you ran? Also did you run the stock 317 springs and valves?

dtsti

iTrader: (6)

I am going with 317 heads and TU1 cam. I do not have any personal experience on the combo yet. Soon though.

Camokid09

iTrader: (1)

im going with 317 heads and running a torquer v.2 cam with a rearmount 67mm stilll working on the set up now but last year i had the cam and turbo on stock motor and made 475 on 10psi and meth mild tune tho good power without boost and good street driving cam IMO

02gangsta/ss

im at 575 rwhp 535fttq procharger disc meth and exhaust motor is bone stock tuned by don at slowhawk

User-c3

Those are good numbers. How long have you been running at that hp level? Is it a street car?

I was planning on tuning to 500hp about 7-8psi if I kept the motor completely stock with the turbo, but if I do the heads cam, drop the cr and increase some lift, I should be safe to run a bit more.

02gangsta/ss

its a street car ...plan on running at track here and theyre also ...been running it over a year at this level i think im close to 12# of boost

willizm

iTrader: (10)

I have a forged ls1 with TU1 cam and 317 heads. My turbo is a TC78 and I have no laggy issues but then again my CR is around 9.5:1 and the tc78 spools pretty damn fast. Even out of boost the car feels pretty responsive.

dtsti

iTrader: (6)

Every FI thread I go into I see you posting so I have been pretty much been ordering parts for my car off of what you did with yours lol.

User-c3

What springs are you running?

willizm

iTrader: (10)

Let me know if you have any questions about what components I used. Can't say what I have is the best setup by any means, but I didn't cut corners at the same time.

I have the patriot gold dual spring kit, stock rockers with trunion upgrade, hardened push rods, ls7 lifters, and stock 317 valves. They seem to be doing well so far and even then I don't have a crazy lift on my cam.

FWIW my tuner who has done quite a few turbo lsx setups in the chicagoland area said that my car is really responsive compared to other cars. Boost pours in quickly and holds it up top decently. Although the TC78 has a 68mm turbine wheel that is limiting me a little up top. I'd rather have a beefy midrange than to have a peeky top end and be laggy.

JoshuaGrooms83

iTrader: (2)

so how laggy does the turbo respond (T76 .81 type) with 317 heads and stock ls1?

Sales@Tick

iTrader: (3)

I am working on a couple off the shelf boost cams for those guys that don't want a custom cam.

I will throw it out that our custom cams are the same price as any of our other cams and we have a package for 679.99.

JoshuaGrooms83

iTrader: (2)

so a decent 22? cam with 317s will perform well then? what size head gasket do you use to keep CR at aroudn 9.5ish so as not to have too much of a CR lose switching to 317s from stock LS1 heads?

Sales@Tick

iTrader: (3)

Really is more to it than just a "decent 22x" cam. It needs to have softer controllable lobes that have a lower major intensity than a higher major intensity. You can't put a XER, XFI, LSL, LSK lobe in a boosted motor and expect to control the valves as well as a softer lobe like an Extreme Marine, HUC, LXL, Extreme RPM, etc. will.

My stage one turbo cam would be perfect for you. 226/226 .605/605 114+3.

JoshuaGrooms83

iTrader: (2)

yeah, i keep running into lobe comments alot latly lol and must say i am learning alot about that.

ok, let say with a properly designed cam with lobes for forced induction, 317 heads, rear turbo, and street manners in mind, the out of boost reponse would not be noticed with such a cam? this is what really is im worried about when switching to 317 heads is the lose of part throttle torque when dropping the CR for boost apps. a larger cam in theory would help this right?

and you are really tempting me with that 226 cam by the way lol