Iron ls1/prc 2.5 heads or 6.0/ls3 heads build
08-12-2018, 01:38 PM
#21
ModSquad
iTrader: (6)
The 6 liter, with untouched LS3 heads/intake, and a very drivable mild camshaft with long tube headers will make 500 easy flywheel horsepower, and be torquey as well.
08-12-2018, 03:13 PM
#22
For what its worth, here is the price breakdown of long block assembly
* 4.8 & 5.3 that I already own bored to a ls1 bore- the machine shop said it will charge me $ 570 including cam bearings installed for machine work to prep for rebuild
* I was going to get Ws6 store rebuild kit which I believe is $699 so about $800 shipped
*I have a friend that said he would install the rebuild kit for me since I helped him with his car but I still was going to throw him something anyway $300
* tsp or tms heads outright $1600
* ls6 intake $350
* cam. $350
lets just round this off to $4000
--------------------------
* 6.0 shortblock $ 2300 shipped
*Stock ls3 new intake $ 300
* Stock ls3 new heads $ 1200
* cam. $350
Lets just round this off to $4150
--------------------------
which has more bang/hp per buck here?
* 4.8 & 5.3 that I already own bored to a ls1 bore- the machine shop said it will charge me $ 570 including cam bearings installed for machine work to prep for rebuild
* I was going to get Ws6 store rebuild kit which I believe is $699 so about $800 shipped
*I have a friend that said he would install the rebuild kit for me since I helped him with his car but I still was going to throw him something anyway $300
* tsp or tms heads outright $1600
* ls6 intake $350
* cam. $350
lets just round this off to $4000
--------------------------
* 6.0 shortblock $ 2300 shipped
*Stock ls3 new intake $ 300
* Stock ls3 new heads $ 1200
* cam. $350
Lets just round this off to $4150
--------------------------
which has more bang/hp per buck here?
08-12-2018, 03:26 PM
#23
TECH Veteran
The 6.0 for sure. You can use a TFS cam which is 280 dollars and make 515 horses with the LS3 heads and GM Ls3 intake.
08-12-2018, 03:38 PM
#25
TECH Veteran
08-18-2018, 06:27 PM
#29
For off the shelf, it's a matter of preference. I haven't been keeping up with the best cam options, however, I think something like a Torquer V2.
08-18-2018, 06:43 PM
#30
I'd look into a custom cam if I were you so that you can specify your powerband goals. You can provide answers to questions like do you want highest numbers, best track times, how will the car be used, idle characteristics, etc?
For off the shelf, it's a matter of preference. I haven't been keeping up with the best cam options, however, I think something like a Torquer V2.
For off the shelf, it's a matter of preference. I haven't been keeping up with the best cam options, however, I think something like a Torquer V2.
honestly im leaning toward the stock 364-370 shortblock build
08-18-2018, 07:53 PM
#31
TECH Veteran
A 6.0 shortblock can make 500 flywheel horspower easily. Just depends on how much you can swing on heads and cam. A small runner aftermarket head will be really explosive on the street and exceed your goals.
08-18-2018, 09:25 PM
#33
TECH Senior Member
08-18-2018, 11:19 PM
#35
TECH Senior Member
You could, but the LS3 would LOVE a .600 lift cam so much better. Get some .600 beehives and you're good. The GM Hot Cam gets 495 HP on the LS3 crate engine thus equipped, and it only has .425 lift. Get yourself a WS6store High Lift Hot Cam with just under .600 lift and 500HP should be yours. And it's VERY streetable!
08-19-2018, 12:57 AM
#36
With what you are building I don't see how a set of dual valve springs is going to break the project. Get a quality set so that you can get a cam that will make optimal power through a wide power band, especially with those heads.
08-19-2018, 01:46 AM
#37
You could, but the LS3 would LOVE a .600 lift cam so much better. Get some .600 beehives and you're good. The GM Hot Cam gets 495 HP on the LS3 crate engine thus equipped, and it only has .425 lift. Get yourself a WS6store High Lift Hot Cam with just under .600 lift and 500HP should be yours. And it's VERY streetable!
I think you will be happy with that choice.
With what you are building I don't see how a set of dual valve springs is going to break the project. Get a quality set so that you can get a cam that will make optimal power through a wide power band, especially with those heads.
With what you are building I don't see how a set of dual valve springs is going to break the project. Get a quality set so that you can get a cam that will make optimal power through a wide power band, especially with those heads.
08-19-2018, 06:57 AM
#38
TECH Veteran
It's hard to spec out a cam. Honestly you basically asking what's your favorite flavor. However when talking to a cam guy the more info you can give the better of you are..... such as gear ratio, vehicle weight, intended usage of vehicle, tire height, intake choice, head choice, compression ratio, cfm flow of the heads, lifter choice, etc.....
08-19-2018, 10:10 AM
#39
TECH Senior Member
^^^^ What Tusky said ^^^^^ Call Cam Motion, TSP, or WS6store for cam advice.
08-20-2018, 08:09 AM
#40
What's the cost/performance ratio difference between these 2 combos:
Gen 3 Iron 5.3 LM7 bored to 3.800 with TFS 220cc heads (328cc)
Gen 3 Iron 6.0 LQ9 bored to 4.030 with TFS 220cc heads (370cc)
Figure 9.5 to 10 compression and an S48x turbo with BTR stage 3 turbo cam or similar.
K1 Chevy LS1 Forged Crank 3.622 used in both cases, with the rest of the combo in both cases being something like:
WISECO custom pistons
Lunati 6.125" Pro Billet Connecting Rods, .927" Wrist Pin, 2.1" Crank Pin
ARP 8740's
Clevite H main Bearing Set (MS-2199H)
Clevite H rod Bearing Set (CB-663HN)
Federal Mogul Sealed Power (1898M)
ARP 234-5608
BTR 0.660 titanium springs
ARP 12-Point Head Stud Kit, Pre-2004 Blocks
Morel 5206 linkbar lifters
Comp Cams Trunion Upgrade 13702-Kit
ARP 134-1003
Timing Set
Let's say the 328 combo puts you at 850 hp on 17 lb of boost and 1050hp on 24 lbs of boost and C16 fuel, how much more would you think the 370 combo would give at similar boost levels? Just trying to get an idea of cost vs performance between these two. If there's a better head to use on the 6.0L that is worth the increase in cost...?
Gen 3 Iron 5.3 LM7 bored to 3.800 with TFS 220cc heads (328cc)
Gen 3 Iron 6.0 LQ9 bored to 4.030 with TFS 220cc heads (370cc)
Figure 9.5 to 10 compression and an S48x turbo with BTR stage 3 turbo cam or similar.
K1 Chevy LS1 Forged Crank 3.622 used in both cases, with the rest of the combo in both cases being something like:
WISECO custom pistons
Lunati 6.125" Pro Billet Connecting Rods, .927" Wrist Pin, 2.1" Crank Pin
ARP 8740's
Clevite H main Bearing Set (MS-2199H)
Clevite H rod Bearing Set (CB-663HN)
Federal Mogul Sealed Power (1898M)
ARP 234-5608
BTR 0.660 titanium springs
ARP 12-Point Head Stud Kit, Pre-2004 Blocks
Morel 5206 linkbar lifters
Comp Cams Trunion Upgrade 13702-Kit
ARP 134-1003
Timing Set
Let's say the 328 combo puts you at 850 hp on 17 lb of boost and 1050hp on 24 lbs of boost and C16 fuel, how much more would you think the 370 combo would give at similar boost levels? Just trying to get an idea of cost vs performance between these two. If there's a better head to use on the 6.0L that is worth the increase in cost...?
Last edited by 5.7stroker; 08-20-2018 at 09:39 AM.
