Cam for L92 Heads: Lessons Learned
TECH Regular
Joined: May 2008
Posts: 460
Likes: 0
From: St.Louis Missouri
I'm glad to see you guys doing a thread on this subject because the camshaft i have in my car is fairly large for the street although the power is all that i want who cares about driveability really? My specs are 251/259 660/663 111LSA it made 527/475, M6, 4:10's, 11:5:1, Stock L76, 92mm TB Ported, 65lbz, 255, Pump, 1-7/8 LT's, true duals. I just dug this up the other day an found this cam was used in a single plane set-up N/A but with a 110+3LSA... What do you guys think about this? My ShortBlock is a LME Forged 408 BTW but this was a 418 CID so i would see as great of results as this, but not to far off atleast.
http://www.youtube.com/watch?v=8ti1zTgln2U
http://www.youtube.com/watch?v=8ti1zTgln2U
I'm glad to see you guys doing a thread on this subject because the camshaft i have in my car is fairly large for the street although the power is all that i want who cares about driveability really? My specs are 251/259 660/663 111LSA it made 527/475, M6, 4:10's, 11:5:1, Stock L76, 92mm TB Ported, 65lbz, 255, Pump, 1-7/8 LT's, true duals. I just dug this up the other day an found this cam was used in a single plane set-up N/A but with a 110+3LSA... What do you guys think about this? My ShortBlock is a LME Forged 408 BTW but this was a 418 CID so i would see as great of results as this, but not to far off atleast.
http://www.youtube.com/watch?v=8ti1zTgln2U
http://www.youtube.com/watch?v=8ti1zTgln2U
TECH Regular
Joined: May 2008
Posts: 460
Likes: 0
From: St.Louis Missouri
Thats awesome herd you guys do work up there! lol Do you think this camshaft is to large for these 68cc LS3 heads? it turns out at about 3500 an it start pulling around 4200 but i think it's starving for air. I was leaning towards the Vic Jr. because of what the guys who tuned my car were saying about the curve on the dyno. I was going with the biggest cam i could run on the street in my car through a M6 with a power range between 3500 an 7500. Figured on the street roll racing it would be ideal for what i was looking to do. It pulls hard as hell, but without a mass air it runs different everywhere and it's not always consistant running the same... 
I am trying to get as close as i can to 600 on the motor with my set-up then spray 200 to it.
I am trying to get as close as i can to 600 on the motor with my set-up then spray 200 to it. Thats awesome herd you guys do work up there! lol Do you think this camshaft is to large for these 68cc LS3 heads? it turns out at about 3500 an it start pulling around 4200 but i think it's starving for air. I was leaning towards the Vic Jr. because of what the guys who tuned my car were saying about the curve on the dyno. I was going with the biggest cam i could run on the street in my car through a M6 with a power range between 3500 an 7500. Figured on the street roll racing it would be ideal for what i was looking to do. It pulls hard as hell, but without a mass air it runs different everywhere and it's not always consistant running the same... I am trying to get as close as i can to 600 on the motor with my set-up then spray 200 to it.
I am trying to get as close as i can to 600 on the motor with my set-up then spray 200 to it.
Teching In
Joined: Sep 2006
Posts: 19
Likes: 0
So let's benchrace my new combo! Did some major overhauls during the winter, but the combo facing us today is:
2000 SS
403" with hand-ported L92s (342/232@.650 on SF 600)
Edelbrock L92 intake with a FAST 1375cfm throttle body (dyno tuning still not done, but obviously going SD)
Mainline nitrous kit 250 shot (plate)
246/254@.050" (306/314 advertised) .621"/.621" 113+4 with Comp Cams short-travel hydraulic rollers
Turbo 400 w/transbrake 4200 stall, ~4800 on the juice
Strange 12 bolt 4.10s, 295/65/15 ET Street Drag Radials
~3600lbs with driver
Looking to turn it 6800-7200 or so as necessary. Might drop in some solid rollers if I have to...
Went 11.0s@119 with 383, ported LS6 heads, LS-R 232/240@.050" .647"/.651" with a 3400 stall on a not-strong-enough 4l60e and Ed Wright tuning.
I'm hoping to get well into the 9's (.70s or .60s) with juice and maybe 10.80s or so on motor.... am I nuts, and what do you guys think of the cam?
2000 SS
403" with hand-ported L92s (342/232@.650 on SF 600)
Edelbrock L92 intake with a FAST 1375cfm throttle body (dyno tuning still not done, but obviously going SD)
Mainline nitrous kit 250 shot (plate)
246/254@.050" (306/314 advertised) .621"/.621" 113+4 with Comp Cams short-travel hydraulic rollers
Turbo 400 w/transbrake 4200 stall, ~4800 on the juice
Strange 12 bolt 4.10s, 295/65/15 ET Street Drag Radials
~3600lbs with driver
Looking to turn it 6800-7200 or so as necessary. Might drop in some solid rollers if I have to...
Went 11.0s@119 with 383, ported LS6 heads, LS-R 232/240@.050" .647"/.651" with a 3400 stall on a not-strong-enough 4l60e and Ed Wright tuning.
I'm hoping to get well into the 9's (.70s or .60s) with juice and maybe 10.80s or so on motor.... am I nuts, and what do you guys think of the cam?
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what size cam would you guys recomend for me i got a forged 370 with valve reliefs, ported l92 heads 64cc ported ls3 mani,1 7/8 tsp headrs all the bolt ons, all im missing for this build is the cam everyhting is sitting in my garage ready to put together just can find the right cam for this build im trying to get anywhere from 480 to 500...to the wheels thanks guys....seems like to me these heads are real headache.....for choosing the right cam oh... and later down the road im putting a fast 102 on it....
How do the Hotcam & GT11 compare against the following for a daily driver? When would I need to shift with these 4 cams? I'm used to revving it out on the old 347, but will I get better overall performance with more torque down low even though I have to shift earlier?
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
Last edited by JimMueller; Apr 24, 2010 at 07:22 PM.
How do the Hotcam & GT11 compare against the following for a daily driver? When would I need to shift with these 4 cams? I'm used to revving it out on the old 347, but will I get better overall performance with more torque down low even though I have to shift earlier?
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
I don't know exactly what that custom cam is but the best I came up with is 226/234 113 + 4. That is probably a pretty decent daily driver cam right there. Probably carry pretty good power to 6500 rpm but peak around 6100-6300 rpm. 4 degrees of overlap should have nice little lope with good manners.
Well that comp cam says it's recommended for towing. Is this a tow rig you are building? What kind of power are you looking for, are you looking for stock idle or lope? I have no idea why other people are doing what they do? I'm not really sure why most people do half the **** they do but they still do.
11 Second Club
Joined: May 2007
Posts: 226
Likes: 1
From: Sydney
How do the Hotcam & GT11 compare against the following for a daily driver? When would I need to shift with these 4 cams? I'm used to revving it out on the old 347, but will I get better overall performance with more torque down low even though I have to shift earlier?
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
LS3 Motor:
stock stroke
pistons with valve reliefs, 4.070 bore
stock ls3 heads, probably mill .040-.050
stock gaskets
ARH 1.75" headers
1. Comp 54-455-11
2. Custom spec
IVO 4
IVC 42
EVO 54
EVC 0
.598/.602
Thanks!!
I copped flak for not putting a big cam in it but don't care and now couldn't be happier with it as it's a very tough daily and the only trouble with it is it fry's the rears when rolling onto 3rd to heavily.
The Hotcam will work fine for a daily check out the the GM performance camshaft comparo thats basically what my cam is except for the XE lobes.
If you want a strip car I would suggest a bigger cam though managed 11.6 in a heavy VE/G8 with a 224 228 xer cam in it, same heads.
cheers
Nitroused383: No, I will not be towing. But the 54-455-11 appears to give more torque below 5000 than the GT11 or Hotcam with a minor HP hit starting above 6000. Since it's 90% daily driver, and the remainder would be autox/HPDE, I would spend little time above 6000. The custom cam above was chosen based upon my old LS1 shiftpoints, but I can't decide where I want my shiftpoint to be.
SS Enforcer: Do you have a dyno of your 418 with the previous cam for comparison? Since I chose to stick with the stock stroke, I'm trying to make up for the relative lack of torque by choosing a torquier (is that a word?) cam and not worry about losing 15-20HP above 6000.
SS Enforcer: Do you have a dyno of your 418 with the previous cam for comparison? Since I chose to stick with the stock stroke, I'm trying to make up for the relative lack of torque by choosing a torquier (is that a word?) cam and not worry about losing 15-20HP above 6000.
11 Second Club
Joined: May 2007
Posts: 226
Likes: 1
From: Sydney
SS Enforcer: Do you have a dyno of your 418 with the previous cam for comparison? Since I chose to stick with the stock stroke, I'm trying to make up for the relative lack of torque by choosing a torquier (is that a word?) cam and not worry about losing 15-20HP above 6000.
cheers
The "bigger" the cam the less torque as a % of Hp. A split of ~10 is plenty.
Also milling heads > than ~.030 will cause the intake manifold to seat poorly due to narrowing the V cavity between the heads.
IMO
Also milling heads > than ~.030 will cause the intake manifold to seat poorly due to narrowing the V cavity between the heads.
IMO