450hp H/C combo
08-06-2008, 09:15 PM
#21
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I would do a livernois stage 2 head w/ stage 2 r cam, they consistently see 440 w/ 2/2 on an ls6 manifold on stock injectors... the 2-r should get you another 10 hp or so then the 2
I think they have a package that is about 2400 shipped that includes ARP bolts, MLS head gaskets, copper spray, plugs, cam, pushrods, and heads...
I think they have a package that is about 2400 shipped that includes ARP bolts, MLS head gaskets, copper spray, plugs, cam, pushrods, and heads...
08-06-2008, 10:42 PM
#22
Around 400+rwhp is where the stock injectors need to be upgraded for sure. The main goal is to keep the injector at or below 80% duty cycle, above that they will not spray fuel accurately. The oil pump is mainly if your going to spin higher with a big cam, but is good insurance anyways regardless. I should be hitting this power level here once I get my final tune, and have replaced both oil pump and injectors.
08-06-2008, 11:29 PM
#23
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Sounds like you are seriously down on power if you are only at 440 to the wheels. 425 hp can be achieved with cam only/full bolt on setups. If those stage 3 heads are only netting you an extra 15 hp, sounds like someone didn't do their homework on either the cam selection or the head headwork.
08-06-2008, 11:37 PM
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What you dont understand is that peak power means nothing when you're soft down low. I'll bet his power under the curve will be much greater than yours with his peak just pulling away.
So for you to imply that you put down 475 "for only $1700 blah blah" and that he spent an extra "3 grand extra for 25 hp" is a ridiculous. A properly matched intake/heads/cam and other misc. necessities is straight up NASTY. 243's that were in the hands of Joe M. are going to simply be works of art and move plenty of air.
08-06-2008, 11:46 PM
#25
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Sounds like you are seriously down on power if you are only at 440 to the wheels. 425 hp can be achieved with cam only/full bolt on setups. If those stage 3 heads are only netting you an extra 15 hp, sounds like someone didn't do their homework on either the cam selection or the head headwork.
08-07-2008, 12:01 AM
#27
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You spent only $1700 on a FAST 90/90 setup PLUS the heads/cam/misc. ?
What you dont understand is that peak power means nothing when you're soft down low. I'll bet his power under the curve will be much greater than yours with his peak just pulling away.
So for you to imply that you put down 475 "for only $1700 blah blah" and that he spent an extra "3 grand extra for 25 hp" is a ridiculous. A properly matched intake/heads/cam and other misc. necessities is straight up NASTY. 243's that were in the hands of Joe M. are going to simply be works of art and move plenty of air.
What you dont understand is that peak power means nothing when you're soft down low. I'll bet his power under the curve will be much greater than yours with his peak just pulling away.
So for you to imply that you put down 475 "for only $1700 blah blah" and that he spent an extra "3 grand extra for 25 hp" is a ridiculous. A properly matched intake/heads/cam and other misc. necessities is straight up NASTY. 243's that were in the hands of Joe M. are going to simply be works of art and move plenty of air.
08-07-2008, 12:02 AM
#28
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Do a Cam and SPRAY!!! MY cam swap alone cost me around $1,000 and that's without labor. So... either buy everything used or keep saving up. PRC 5.3 Stg 2.5 aren't too expensive used.
08-07-2008, 09:28 AM
#29
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Sounds like you are seriously down on power if you are only at 440 to the wheels. 425 hp can be achieved with cam only/full bolt on setups. If those stage 3 heads are only netting you an extra 15 hp, sounds like someone didn't do their homework on either the cam selection or the head headwork.
08-07-2008, 02:04 PM
#31
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I'm in the process of installing the "Va Speed" HC kit. New stock 243's ported w/ Dual valvesprings, pushrods, and a moderate Comp 111LSA cam. $1550. Add in gaskets, etc it'll be in the $2K range. W/ my upgraded fuel system, Lt's, GMMG, etc I should end out in the 420-450RWHP range w/ a 9" rear and 4.11 gears 
. So, it is possible...... but the key is the supporting mods.
Supporting mods: clutch - $500 to 12000 depending on brand, tune (unless you're doing it yourself), and save for the CheaTR cam, no HC package will work that great w/out headers, air intake, free-flowing exhaust, etc. It's all this supporting stuff that will drive the total price to the $4K+ range.
. So, it is possible...... but the key is the supporting mods.Supporting mods: clutch - $500 to 12000 depending on brand, tune (unless you're doing it yourself), and save for the CheaTR cam, no HC package will work that great w/out headers, air intake, free-flowing exhaust, etc. It's all this supporting stuff that will drive the total price to the $4K+ range.
08-08-2008, 09:34 AM
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That was 1700 before the FAST. I feel that the 5.3l heads with the MS3 is a very well matched combo. Heads with a smaller runner and smaller combustion chamber with a large cam. I have a very broad and useable powerband because of that. I daily drive my car still with 3.42's in the rear and i have no cam surge anywhere. Ill put my car against any other h/c street car out there, it makes plenty of power for a great price.
08-08-2008, 12:14 PM
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Yes, Comp 228/232 .600/.601 111LSA. Installed straight up.
08-08-2008, 04:28 PM
#36
OK you've got $250 in the springs...what kind of ported heads do you get for other $600 ... Like I said I wonder about the quality meaning how well they perform and what kind of flow numbers they produce......hand porting is old school tech that is why CNC porting is used now days so that all the porting is duplicated identically.
08-08-2008, 09:21 PM
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OK you've got $250 in the springs...what kind of ported heads do you get for other $600 ... Like I said I wonder about the quality meaning how well they perform and what kind of flow numbers they produce......hand porting is old school tech that is why CNC porting is used now days so that all the porting is duplicated identically.
08-09-2008, 12:04 AM
#38
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OK you've got $250 in the springs...what kind of ported heads do you get for other $600 ... Like I said I wonder about the quality meaning how well they perform and what kind of flow numbers they produce......hand porting is old school tech that is why CNC porting is used now days so that all the porting is duplicated identically.
Sure I could have spent $2300-2800 on AFR's or TrickFlows, but the heads I got look great and they are 64cc 243 castings. I can spend that other $2K elsewhere now.
As for your doubts....It's cool. If I hadn't dealt w/ Va Speed before on other work (got a 9" rear center section assembled by them) then I might be skeptical too. So far their assembly/workmanship has been top notch.
Hell if nothing else I'll take her to the track and let the timeslips (not the flowbench) be the measure of performance once I get it assembled
Exactly.
08-09-2008, 01:53 PM
#39
I am very familar with old school tech since I am old school (45+ years of hot rodding) All of your prototype porting is done by hand till the right port shape is found that produces the flow that the head porter is seeking but then it is duplicated with a CNC program for ease of production..
