Cam spec for 450 LS
Cam spec for 450 LS Get ready to buy a cam for c6 corvette . New RHS 450 short block 11.50 compression with 260 TF LS 7 heads hollow stem valves crower shaft system. Looking @ LLSR solid roller maximum effort for the street . Car has a 4.10 gear with 15inch conversion . Need input . Thanx for your help .
Would imagine Mod Speed Tigger should chime in soon
Max effort and street cam are like looking for a blonde AND a brunette
I agree with Darth with the 260-ish intake lobe. Guess some more info from you on transmission clutch/converter and intake/TB plus intended RPMs too
Max effort and street cam are like looking for a blonde AND a brunette
I agree with Darth with the 260-ish intake lobe. Guess some more info from you on transmission clutch/converter and intake/TB plus intended RPMs too
Get ready to buy a cam for c6 corvette . New RHS 450 short block 11.50 compression with 260 TF LS 7 heads hollow stem valves crower shaft system. Looking @ LLSR solid roller maximum effort for the street . Car has a 4.10 gear with 15inch conversion . Need input . Thanx for your help .
The car has AR 1 7/8 headers m6 trans 266 first gear Mcleod RXT clutch / most likely I will be running Tony MSD intake. Car has a ls2 with cnc ls3heads with a Kaotik cam 235/243@.050 lift is 623/625 113+3 . The car has good driving ability after I installed the 410 gear
Last edited by Last 1; Mar 14, 2018 at 03:38 PM. Reason: Changed
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Car made great power as an LS2 with LS3 heads. North of 520whp if I recall.
Now he's decided to add cubes in efforts to destroy driveline components.
Great fellow here guys, appreciate you all chiming in with recommendations. Mike and myself have bacame good friends over the past couple of years and chat weekly and ahoot the ****. We both love cars and get tired of listening to our old lady's.
Now he's decided to add cubes in efforts to destroy driveline components.
Great fellow here guys, appreciate you all chiming in with recommendations. Mike and myself have bacame good friends over the past couple of years and chat weekly and ahoot the ****. We both love cars and get tired of listening to our old lady's.
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Verdad Gallardo Car made great power as an LS2 with LS3 heads. North of 520whp if I recall.
Now he's decided to add cubes in efforts to destroy driveline components.
Great fellow here guys, appreciate you all chiming in with recommendations. Mike and myself have bacame good friends over the past couple of years and chat weekly and ahoot the ****. We both love cars and get tired of listening to our old lady's.
Now he's decided to add cubes in efforts to destroy driveline components.
Great fellow here guys, appreciate you all chiming in with recommendations. Mike and myself have bacame good friends over the past couple of years and chat weekly and ahoot the ****. We both love cars and get tired of listening to our old lady's.
Just to throw something out there. I don't think it needs a tight lobe center, you have enough cubes to make torque down low.
I'll throw my un-educated guess out there for a MAX effort "street" car as something like this:
Intake - 265 @ .050" - .420" lobe lift (.756" w/ 1.8:1)
Exhaust - 278 @ .050" - .400" lobe lift (.720" w/ 1.8:1)
LSA - 114 +6
ICL - 108
ECL - 120
This would require different valve springs than those that come with the assembled head if you are buying them that way. Also, a set of good shaft rockers.
I had Mike Jones spec a cam for my last SBC. It made exactly the power he said it would and at the RPM I asked for. Great guy to deal with. I would trust his recommendations.
Just to throw something out there. I don't think it needs a tight lobe center, you have enough cubes to make torque down low.
I'll throw my un-educated guess out there for a MAX effort "street" car as something like this:
Intake - 265 @ .050" - .420" lobe lift (.756" w/ 1.8:1)
Exhaust - 278 @ .050" - .400" lobe lift (.720" w/ 1.8:1)
LSA - 114 +6
ICL - 108
ECL - 120
This would require different valve springs than those that come with the assembled head if you are buying them that way. Also, a set of good shaft rockers.
Just to throw something out there. I don't think it needs a tight lobe center, you have enough cubes to make torque down low.
I'll throw my un-educated guess out there for a MAX effort "street" car as something like this:
Intake - 265 @ .050" - .420" lobe lift (.756" w/ 1.8:1)
Exhaust - 278 @ .050" - .400" lobe lift (.720" w/ 1.8:1)
LSA - 114 +6
ICL - 108
ECL - 120
This would require different valve springs than those that come with the assembled head if you are buying them that way. Also, a set of good shaft rockers.
Very streetable system in a C6Z.
I had Mike Jones spec a cam for my last SBC. It made exactly the power he said it would and at the RPM I asked for. Great guy to deal with. I would trust his recommendations.
Just to throw something out there. I don't think it needs a tight lobe center, you have enough cubes to make torque down low.
I'll throw my un-educated guess out there for a MAX effort "street" car as something like this:
Intake - 265 @ .050" - .420" lobe lift (.756" w/ 1.8:1)
Exhaust - 278 @ .050" - .400" lobe lift (.720" w/ 1.8:1)
LSA - 114 +6
ICL - 108
ECL - 120
This would require different valve springs than those that come with the assembled head if you are buying them that way. Also, a set of good shaft rockers.
Just to throw something out there. I don't think it needs a tight lobe center, you have enough cubes to make torque down low.
I'll throw my un-educated guess out there for a MAX effort "street" car as something like this:
Intake - 265 @ .050" - .420" lobe lift (.756" w/ 1.8:1)
Exhaust - 278 @ .050" - .400" lobe lift (.720" w/ 1.8:1)
LSA - 114 +6
ICL - 108
ECL - 120
This would require different valve springs than those that come with the assembled head if you are buying them that way. Also, a set of good shaft rockers.
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Joined: Jun 2016
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From: Central Cal.
Most LS engines, Gen IV in particular, need lots of help in the exhaust department, as the intake ports are HUGE and the exhaust ports are NOT. Therefore the exhaust duration should far exceed the intake duration.
114* LSA + 2* or 3*.
That said.....see what Cam Motion would recommend.
KW
Ls-482 rhs Hi ALL, I did not know there were SO MANY here with experience in the RHS block engine.
My RHS experience is in Off Road racing engines, a common build for a LS-482
My Experience is with shared "tech" from Wegner Automotive, the ones the TAUGHT COMP HOW the machine their RHS blocks.
I use a Calles 4.5" Crankshaft, Calles 6.350" Rods, Racetech Pistons
My engine has a MAX REV of 6500, with a 6200 Shift Point.
I run a 242/256 Cam of .600"/.560" on a 116 C/L
I too fit Crower Shaft rockers, Crower Cams cam.
This is a Dry Sump engine (pan) with External Three Stage Pump.
AGAIN, thanks Jake as you ARE SPOT ON !
The REASON is the CAM RPM TORQUE BAND must MATCH MAX Piston Speed.
What stroke will your crankshaft have ?
Problems found :
Oil pressure, my spec is an external pump.
You could fit a Crower Copper cam with Roller Bearings.
Pin Boss area INCREASE as the LS uses a "short" pin.
I have used a .990" pin in some, regardless ALL .180" + wall (M-350)
DLC Pin coating is a requirement.
Spark Advance VERY Low at 2500 RPM (18 degrees as common)
A 2" exhaust is fitted OR LARGER (required) Step Header
THUS, Last1 NO as to that cam spec 265/278
I would welcome you to call (949-250-1797) there is MUCH more to share.
ONE SUCH is that you will need to "sert" the short end bolt of the Crower cast steel Rocker mount OR the plate will break !
Lance
My RHS experience is in Off Road racing engines, a common build for a LS-482
My Experience is with shared "tech" from Wegner Automotive, the ones the TAUGHT COMP HOW the machine their RHS blocks.
I use a Calles 4.5" Crankshaft, Calles 6.350" Rods, Racetech Pistons
My engine has a MAX REV of 6500, with a 6200 Shift Point.
I run a 242/256 Cam of .600"/.560" on a 116 C/L
I too fit Crower Shaft rockers, Crower Cams cam.
This is a Dry Sump engine (pan) with External Three Stage Pump.
AGAIN, thanks Jake as you ARE SPOT ON !
The REASON is the CAM RPM TORQUE BAND must MATCH MAX Piston Speed.
What stroke will your crankshaft have ?
Problems found :
Oil pressure, my spec is an external pump.
You could fit a Crower Copper cam with Roller Bearings.
Pin Boss area INCREASE as the LS uses a "short" pin.
I have used a .990" pin in some, regardless ALL .180" + wall (M-350)
DLC Pin coating is a requirement.
Spark Advance VERY Low at 2500 RPM (18 degrees as common)
A 2" exhaust is fitted OR LARGER (required) Step Header
THUS, Last1 NO as to that cam spec 265/278
I would welcome you to call (949-250-1797) there is MUCH more to share.
ONE SUCH is that you will need to "sert" the short end bolt of the Crower cast steel Rocker mount OR the plate will break !
Lance
Thank everyone for their input . I appreciate your help I just trying to do it right the first time . Lance I will be calling you . Crankshaft is a 4.125 stroke and 4.165 bore -11 domes wiseco
Last edited by Last 1; Apr 23, 2018 at 06:59 PM. Reason: Changed
Best bet is to get an expert like Pantera EFI, Mike Jones or similar to custom spec a cam for you.