Cam
09-20-2004, 10:41 PM
#4
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That cam is going to thump pritty good with 11 degrees of overlap. With that size of cam u might run into P/V clearance. You will have to check this by putting the cam in and rotating the motor by hand. Do you plan on running heads. Any kind of head that has been mill will not clear that cam for sure.
09-20-2004, 10:59 PM
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I Was Thinking About Running Ls6 Heads
Modern Muscle Technologies Made This Cam
They Said It Would Make 400+ Horsepwer On Stock Motor Without Heads
Just With Lt Headers And A Tune
It Came With Manley Pushrods, Ferera Retainers And Isky Valve Springs
Modern Muscle Technologies Made This Cam
They Said It Would Make 400+ Horsepwer On Stock Motor Without Heads
Just With Lt Headers And A Tune
It Came With Manley Pushrods, Ferera Retainers And Isky Valve Springs
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09-20-2004, 11:26 PM
#8
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I think i pmed u on the heads. The cam is big but it will make realy good power. I want $2,300 for the heads. Here is the write up on the heads from SDPC.
CNC Ported LS6 Heads
Once in a lifetime opportunity! Earlier this year we bought truckloads of bare LS6 cylinder heads for our engine customers and for our own R&D programs. What does this mean to you? A one-time special price on bare LS6 CNC ported heads. And here is the really cool part, we have not milled anything off of the deck surface so you can set the chamber size to your specification. A big plus for you LS1 guys who are trying to kill a little compression ratio or you just simply need a larger chamber for those big cubic inches.
These are fully CNC-ported new LS6 castings (243). The seat area is hand finished and they have a high performance valve-job. Wash and assemble! The valve seats are prepared for the stock LS1 valve sizes of 2.000” and 1.550” --- another big plus, because you can take your stock heads and just switch the components for bolt-on horsepower. No need to buy new valves, just match your valve springs to the camshaft, decide what chamber size you require, mill if necessary, lap the valves and assemble! Customers have reported a 30rwhp gain on stock ZO6’s with absolutely no other changes.
The combustion chambers are approximately 70cc with the stock GM valves. Larger valves can be installed, of course you will need to have the seats cut for the increased diameter, though we have not seen any gain on the stock bore with the combustion chamber remaining in this configuration when larger valves are installed.
For an additional $92.00, you can send us your valve train components and we will back-cut the intakes, lap the valves, set the spring heights, and assemble the heads for you. Completely painless! This price is for the stock diameter valves only and does not include any additional components or labor that might be required for proper assembly, i.e.; valve seals, shims, etc. Think about it – no core charge, new LS6 heads, CNC ported, use your stock valves --- it’s a no brainer! Don’t wait too long, ‘cause when their gone – they are long gone!
Flow Figures 0.100 0.200 0.300 0.400 0.500 0.550 0.600
Intake 66 140 210 255 291 304 307
Exhaust 55 112 163 213 218 222 225
SF1020 - 28”H2O, stock valve size 2.00/1.550, SDPC back-cut intake valve.
The flow numbers are higher than what i have posted by 4-7 CFM.
Stock Vavle's and springs. They where never went to GM to be milled. So they where 69.98 CC when i got the heads. I had them milled .02 so they are 67cc now. These heads are bad *** for any motor (346-427) $2,300
CNC Ported LS6 Heads
Once in a lifetime opportunity! Earlier this year we bought truckloads of bare LS6 cylinder heads for our engine customers and for our own R&D programs. What does this mean to you? A one-time special price on bare LS6 CNC ported heads. And here is the really cool part, we have not milled anything off of the deck surface so you can set the chamber size to your specification. A big plus for you LS1 guys who are trying to kill a little compression ratio or you just simply need a larger chamber for those big cubic inches.
These are fully CNC-ported new LS6 castings (243). The seat area is hand finished and they have a high performance valve-job. Wash and assemble! The valve seats are prepared for the stock LS1 valve sizes of 2.000” and 1.550” --- another big plus, because you can take your stock heads and just switch the components for bolt-on horsepower. No need to buy new valves, just match your valve springs to the camshaft, decide what chamber size you require, mill if necessary, lap the valves and assemble! Customers have reported a 30rwhp gain on stock ZO6’s with absolutely no other changes.
The combustion chambers are approximately 70cc with the stock GM valves. Larger valves can be installed, of course you will need to have the seats cut for the increased diameter, though we have not seen any gain on the stock bore with the combustion chamber remaining in this configuration when larger valves are installed.
For an additional $92.00, you can send us your valve train components and we will back-cut the intakes, lap the valves, set the spring heights, and assemble the heads for you. Completely painless! This price is for the stock diameter valves only and does not include any additional components or labor that might be required for proper assembly, i.e.; valve seals, shims, etc. Think about it – no core charge, new LS6 heads, CNC ported, use your stock valves --- it’s a no brainer! Don’t wait too long, ‘cause when their gone – they are long gone!
Flow Figures 0.100 0.200 0.300 0.400 0.500 0.550 0.600
Intake 66 140 210 255 291 304 307
Exhaust 55 112 163 213 218 222 225
SF1020 - 28”H2O, stock valve size 2.00/1.550, SDPC back-cut intake valve.
The flow numbers are higher than what i have posted by 4-7 CFM.
Stock Vavle's and springs. They where never went to GM to be milled. So they where 69.98 CC when i got the heads. I had them milled .02 so they are 67cc now. These heads are bad *** for any motor (346-427) $2,300
09-20-2004, 11:38 PM
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SPDC no longer sells these heads. They have a set like them but they are 59cc chambers so they will not clear the cam you have. Also we cleaned up the heads to add some more flow. We talked to SPDC, LPE, TEA, and GTP they said that it would help to pick up 5-7 CFM's.