65SSZO6

iTrader: (4)

Wanted to get some input from you guys/gals on a cam and head swap for my Chevelle's engine.Original build...

2004 LQ4 6.0L LS motor from a 2500 Chevrolet truck.Stock crankshaft turned .010/.010 new bearings Speed Pro 4.020 Hypereutetic Pistons and Plasma Moly rings.2004 Corvette Z06 Cam and matching spring kit. LS1 intake,throttle body, fuel injectors, and fuel rail from a 2000 F-Body(Camaro/Firebird).F-Body accessory drive from 98-Up Camaro/Firebird and custom alternator relocation kit from SMOKINHAWK here on LS1Tech.com.Oil pan and pick up tube from Street and Performance.Stock GM 5.3L ECU and engine harness from LS1engineharness.com tuned with HPTuning software.Dougs Ceramic coated 1 7/8" long tube headers (and motor mount adapters) into 2 1/2 exhaust with X pipe and 40 series Flowmasters.03 5.3L truck MAF.Custom intake tube with K&N filter.

200R4 trans with a 2500 RPM converter,3.73 Posi 12 Bolt rear end.

Here are my #s now 328RWHP and 337FTLBS at the rear wheels.

As you can see from the dyno graph my A/F ratio was way lean,so I bought some FIC 42gph injectors(stock injectors are max on duty cycle).I replaced my LS1 intake with a LS6 intake and purchased a Jantzer(SP?) ported and polished 85mm throttle body.

Knowing the engine needs to be retuned for the larger injectors and other changes,I think it might be a good time for a cam and head swap.Plus, I hate to pay $ to tune for my current changes then for a cam and spring change etc,etc.

My goals are to get to 440-450 RWHP while keeping good drivibility.Instead of fighting with the 317 cylinder heads,and ZO6 springs, I am thinking a pair LS3 heads with upgraded springs,intake with a cam change would be the easiest and least expensive way to reach my HP goal.Any help/input would be appreciated.

TurboS10

iTrader: (12)

Upgraded pushrods and YT roller rockers
Check sweep and measure lifter preload
SD tune
Budget -
Livernois 243 stg II's $1400 231/237 LSL custom cam

Not budget-
AFR 230's and 231/231 LSL custom cam, Fast 102/NW102

At least 3.5" CAI regardless 4" would be better and you could use 3" duals w/magnaflows.
Swap to XER lobes and same duration cam and use stock rockers.

65SSZO6

iTrader: (4)

Oops,already upgraded to Trick Flow push rods.I thought with my LQ4s 4.020 bore the LS3 heads at under $800 for the pair and the LS3 intake around $200would be the best flowing top end for the $? I would be willing to mill the heads to increase compression and upgrade the valve springs. Could use a cam with .600-.650 lift without flycutting the pistons? What cam would be best for that combo? I hear the LS3 heads need help on the exhaust side?

TurboS10

iTrader: (12)

https://ls1tech.com/forums/generation-iii-internal-engine/1327224-l92-heads-off-afr-230-v2-heads-504rwhp-6-0l-automatic.html

https://ls1tech.com/forums/generation-iii-internal-engine/1327224-l92-heads-off-afr-230-v2-heads-504rwhp-6-0l-automatic.html

https://ls1tech.com/forums/generatio...-v2-heads-504r

https://ls1tech.com/forums/13832085-post1.html


IDK why it does this every once in a while, sometimes it changes what it pastes......last one works

65SSZO6

iTrader: (4)

Link does not work.

Anyone else have input?

garygnu

SDPC is selling ls3 heads for $375 each.look at a comp lsr cam ,or contact PAT-G for a cam.

65SSZO6

iTrader: (4)

Last link works.Yes #s are impressive but you have to think those AFR heads are $2250-2500 for a pair?Then I still have to buy a cam so Im $3000+ for the swap.Too rich for my budget. If I go LS3 with spring upgrade $1000,mill them?, L98 intake $230, and ? cam?$450, new Tb $300,and sell off my 317's with ZO6 springs,ZO6 cam, LS6 intake and Janzer TB,I think Im into the whole swap for a little more than a $1000?