LS3 vs L92 heads (valves)
#3
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The intakes are hollow on the LS3. The exhaust are the same. There are better valves out then the stock GM ones. If the heads are already assy. then its a good buy. The GM intakes run over $ 25 a piece.
#4
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not quite sure where u seen the LS3 heads more expensive than the L92s.
Ls3- http://sdparts.com/details/12629063
L92- http://sdparts.com/details/gm-factor...parts/12582713
Ls3- http://sdparts.com/details/12629063
L92- http://sdparts.com/details/gm-factor...parts/12582713
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#9
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thats not too bad. i have seen stock l92 heads assembled on here go for 400 plus shipping. somtimes a bit more. for 650 plus shipping and the need for new springs you should just call some of the sponsors to see if they just have brand new fresh gm castings with upgraded springs on them already and u can bolt them on with no worries. probably would be around the same price. cuz u figure the heads will be 700 dollars shipped to you through your connection. plus a valve spring kit which is about 240 so thats 940 for stock used heads with a upgraded spring kit. plus a valve job on the used heads which would be into the 1200+ dollar range total. at that point it would almost be worth buying CNC'd L92s from a sponsor.
#10
TECH Enthusiast
Speaking of Scoggin-Dickey THIS LS3 head is brand new, CNC'd, and has much better flow than stock at a GOOD price !
http://sdparts.com/details/gm-perfor...parts/88958698
Dave
#12
TECH Enthusiast
What brand of valves are they using ?
http://sdparts.com/details/scoggin-d...enter/sd8801-1
Cylinder Head, LS3 CNC Ported, Manley Valves, 0.660" Lift Dual Springs
$749.99
Part Number:
SD8801-1
Brand:
Scoggin Dickey Parts Center
SKU: SD8801-1
Price: $749.99 ( EACH )
Casting Number 12595364 or 12582716
Valve Angle 15-degree
Combustion Chamber 70cc*
Intake Port Volume 279cc*
Exhaust port Volume 99cc*
Minimum Cylinder Bore 4.000
* Approximate, Numbers are within +/- 2ccs
Milling Information for Combustion Chamber Sizing:
- Approximately 0.006 per 1-cc
For 68-cc Chamber Remove 0.012
For 65-cc Chamber Remove 0.030
Specifications:
Max Lift: 0.660"
Locks: Patriot Perf
Retainers: Titanium
Valves: Manley
Flow Chart:
Flowed @ 28 H20
Lift 0.100 0.200 0.300 0.400 0.500 0.600 0.650
Intake 70 153 225 280 324 350 358
Exhaust 52 118 180 201 217 230 236
Dave
http://sdparts.com/details/scoggin-d...enter/sd8801-1
Cylinder Head, LS3 CNC Ported, Manley Valves, 0.660" Lift Dual Springs
$749.99
Part Number:
SD8801-1
Brand:
Scoggin Dickey Parts Center
SKU: SD8801-1
Price: $749.99 ( EACH )
Casting Number 12595364 or 12582716
Valve Angle 15-degree
Combustion Chamber 70cc*
Intake Port Volume 279cc*
Exhaust port Volume 99cc*
Minimum Cylinder Bore 4.000
* Approximate, Numbers are within +/- 2ccs
Milling Information for Combustion Chamber Sizing:
- Approximately 0.006 per 1-cc
For 68-cc Chamber Remove 0.012
For 65-cc Chamber Remove 0.030
Specifications:
Max Lift: 0.660"
Locks: Patriot Perf
Retainers: Titanium
Valves: Manley
Flow Chart:
Flowed @ 28 H20
Lift 0.100 0.200 0.300 0.400 0.500 0.600 0.650
Intake 70 153 225 280 324 350 358
Exhaust 52 118 180 201 217 230 236
Dave
#14
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thats not bad at all i think. that is if they are for sure brand new. 640 shipped plus some 180 dollar springs suited for a .600+ lift cam is only 820 dollars. than maybe try to sell those springs for 50 bucks to get some money back. not bad at all. the ls3 or l92 heads from SDPC are 750+ and u would still need springs (again assuming your putting in a .600+ lift cam). so 640 shipped for BRAND NEW ASSEMBLED PAIR of l92 heads is agreat deal.
#15
TECH Enthusiast
thats not bad at all i think. that is if they are for sure brand new. 640 shipped plus some 180 dollar springs suited for a .600+ lift cam is only 820 dollars. than maybe try to sell those springs for 50 bucks to get some money back. not bad at all. the ls3 or l92 heads from SDPC are 750+ and u would still need springs (again assuming your putting in a .600+ lift cam). so 640 shipped for BRAND NEW ASSEMBLED PAIR of l92 heads is agreat deal.
http://sdparts.com/details/scoggin-d...enter/sd8801-1
The STOCK Ls3 / L92 heads from SDPC are
Ls3- http://sdparts.com/details/12629063 $375 each
L92- http://sdparts.com/details/gm-factor...parts/12582713 $450 each
Dave
#16
TECH Resident
iTrader: (3)
Those SDPC heads that are $750 each have been CNC'd and flow like stock LS7 heads, plus they have Manley valves, Titanium Retainers, Patriot Performance Locks and DUAL valvesprings, good for .660" lift.
http://sdparts.com/details/scoggin-d...enter/sd8801-1
The STOCK Ls3 / L92 heads from SDPC are
Ls3- http://sdparts.com/details/12629063 $375 each
L92- http://sdparts.com/details/gm-factor...parts/12582713 $450 each
Dave
http://sdparts.com/details/scoggin-d...enter/sd8801-1
The STOCK Ls3 / L92 heads from SDPC are
Ls3- http://sdparts.com/details/12629063 $375 each
L92- http://sdparts.com/details/gm-factor...parts/12582713 $450 each
Dave
PAIR of STOCK l92 heads is a great price.
i think u just got confused on what i was telling him.
and as far as paying $1400+ dollars for cnc heads from SDPC is just not worth it TO ME. i would rather pay more at WCCH or TEA for their cnc l92s.
#18
#20
11 Second Club
iTrader: (3)
LS3 vs L92 heads (valves)
Jumped om here looking for answers to my questions and found this. I'm actually replacing the stock intake valves in some L92's or 823 heads with new GM LS3 hollow stem intake valves.
I'm finding the top of the LS3 valve to about .025 taller.
I'm finding the top of the LS3 valve to about .025 taller.