Stroker ls3 cam
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Joined: Jan 2010
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Stroker ls3 cam
Hey guys
Am seeking experts/users opinion on proven Ls3 stroker cam.
Honestly, I've tried several cams at the same combo with not bad results but haven't hit my goal yet.
It's an M6 C6 Ls3 stroked to a 429ci with L99 heads, Fast 102 intake and throttle body. Compression is 11.3
I've seen people making over 560rwhp with similar combos. The max I've reached was 537rwhp and 502RWTQ
239/251 .621”/.632” 112 LSA +2
Comp HUC lobes
I feel like am still leaving a room to make more power
Am seeking experts/users opinion on proven Ls3 stroker cam.
Honestly, I've tried several cams at the same combo with not bad results but haven't hit my goal yet.
It's an M6 C6 Ls3 stroked to a 429ci with L99 heads, Fast 102 intake and throttle body. Compression is 11.3
I've seen people making over 560rwhp with similar combos. The max I've reached was 537rwhp and 502RWTQ
239/251 .621”/.632” 112 LSA +2
Comp HUC lobes
I feel like am still leaving a room to make more power
Last edited by z0vette; Sep 27, 2015 at 01:31 AM.
Racer
Joined: Jan 2015
Posts: 375
Likes: 31
From: San Antonio TX
Hey guys
Am seeking experts/users opinion on proven Ls3 stroker cam.
Honestly, I've tried several cams at the same combo with not bad results but haven't hit my goal yet.
It's an M6 C6 Ls3 stroked to a 429ci with L99 heads, Fast 102 intake and throttle body. Compression is 11.3
I've seen people making over 560rwhp with similar combos. The max I've reached was 537rwhp and 502RWTQ
239/251 .621”/.632” 112 LSA +2
Comp HUC lobes
I feel like am still leaving a room to make more power
Am seeking experts/users opinion on proven Ls3 stroker cam.
Honestly, I've tried several cams at the same combo with not bad results but haven't hit my goal yet.
It's an M6 C6 Ls3 stroked to a 429ci with L99 heads, Fast 102 intake and throttle body. Compression is 11.3
I've seen people making over 560rwhp with similar combos. The max I've reached was 537rwhp and 502RWTQ
239/251 .621”/.632” 112 LSA +2
Comp HUC lobes
I feel like am still leaving a room to make more power
I ask because it's possible to have too much lift. And if your valve lift is too high (pass the point where the head flow stalls or hits turbulence) then you can actually hurt power.
Now.....that much said, chasing dyno numbers is pretty dumb. Why? Because different types of dynos will yield different results; sometimes, the same type of dynos will yield different results if the calibration is off. Also, weather/atmospheric conditions can alter your results on the same dyno. So......there's that.
That said, you can go with a big-assed cam. It may kill your low RPM numbers/performance, but it should get you a bunch more power up top.....especially if you're willing to rev to 7000+ RPMs like most of those 560+ HP engines you're chasing.
Finally.....for an LS3 with 11.2:1 static compression ratio, your current cam is pretty much 'there', from a duration standpoint. The only thing that may need to be sorted out are the lobe angles.
KW
Last edited by KW Baraka; Sep 27, 2015 at 01:48 AM.
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Are the heads ported? And if so, have you had them flowed?
I ask because it's possible to have too much lift. And if your valve lift is too high (pass the point where the head flow stalls or hits turbulence) then you can actually hurt power.
Now.....that much said, chasing dyno numbers is pretty dumb. Why? Because different types of dynos will yield different results; sometimes, the same type of dynos will yield different results if the calibration is off. Also, weather/atmospheric conditions can alter your results on the same dyno. So......there's that.
That said, you can go with a big-assed cam. It may kill your low RPM numbers/performance, but it should get you a bunch more power up top.....especially if you're willing to rev to 7000+ RPMs like most of those 560+ HP engines you're chasing.
Finally.....for an LS3 with 11.2:1 static compression ratio, your current cam is pretty much 'there', from a duration standpoint. The only thing that may need to be sorted out are the lobe angles.
KW
I ask because it's possible to have too much lift. And if your valve lift is too high (pass the point where the head flow stalls or hits turbulence) then you can actually hurt power.
Now.....that much said, chasing dyno numbers is pretty dumb. Why? Because different types of dynos will yield different results; sometimes, the same type of dynos will yield different results if the calibration is off. Also, weather/atmospheric conditions can alter your results on the same dyno. So......there's that.
That said, you can go with a big-assed cam. It may kill your low RPM numbers/performance, but it should get you a bunch more power up top.....especially if you're willing to rev to 7000+ RPMs like most of those 560+ HP engines you're chasing.
Finally.....for an LS3 with 11.2:1 static compression ratio, your current cam is pretty much 'there', from a duration standpoint. The only thing that may need to be sorted out are the lobe angles.
KW
To me.. The Dyno is a measurement device that measures your output throughout the whole RPM/run. so, it made me think that There is a room to improve and compete with the guys that are making 35/40 rwhp more than me up to 6800rpm with similar setups and with less CID's.
But I have noticed that all the cams used were at the 113 to 115 LSA range!!!
To nswering your question.. The heads are GM L99 PRC stage one. So.. Yes they are ported.
The cam am using now has the HUC lobe which is suppose to be very stable and control the valves very well at higher RPMs and the lift is reasonable as I can see.. Comparing to other stroker cams
Last edited by z0vette; Sep 27, 2015 at 07:02 AM.
Melting Slicks
Joined: Jun 2005
Posts: 2,396
Likes: 52
From: Sicamous BC
I chased a power issue with my LS3 stroker, finally pulled the heads & had them checked. They were supposedly ported by a big name, other than cleaned up chambers the ports had not been touched. They were never going to make my power expectation's.
I only did one cam change before becoming suspicious of the cylinder heads. I went thru the valve train, 2 sets of 3" cat backs. 1 7/8's AR headers with 3" mid section with a FAST 102 & NW 102 TB
We did a completely different set of cylinder heads, cathedral BTW & substantial power gains. The only change was the cylinder heads.
I only did one cam change before becoming suspicious of the cylinder heads. I went thru the valve train, 2 sets of 3" cat backs. 1 7/8's AR headers with 3" mid section with a FAST 102 & NW 102 TB
We did a completely different set of cylinder heads, cathedral BTW & substantial power gains. The only change was the cylinder heads.
Racer
Joined: Jan 2015
Posts: 375
Likes: 31
From: San Antonio TX
KW
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But still.. The combo should still make more with stock heads.. Assuming they aren't ported. The ls3 heads have big ports and should support the bore/stroke I have
No doubt that the porting job will affect the power though
Thread Starter
Instructor
Joined: Jan 2010
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I chased a power issue with my LS3 stroker, finally pulled the heads & had them checked. They were supposedly ported by a big name, other than cleaned up chambers the ports had not been touched. They were never going to make my power expectation's.
I only did one cam change before becoming suspicious of the cylinder heads. I went thru the valve train, 2 sets of 3" cat backs. 1 7/8's AR headers with 3" mid section with a FAST 102 & NW 102 TB
We did a completely different set of cylinder heads, cathedral BTW & substantial power gains. The only change was the cylinder heads.
I only did one cam change before becoming suspicious of the cylinder heads. I went thru the valve train, 2 sets of 3" cat backs. 1 7/8's AR headers with 3" mid section with a FAST 102 & NW 102 TB
We did a completely different set of cylinder heads, cathedral BTW & substantial power gains. The only change was the cylinder heads.
Racer
Joined: Jan 2015
Posts: 375
Likes: 31
From: San Antonio TX
Ported heads done right should absolutely make more power than stock heads. And if ported right, the LS3 heads should build flow right up to .650" of lift.
But if your heads (for example) does NOT build flow past the point of your cam lift, then you're gonna have less power than you should through the entire power curve.
So....my point? Unless you know the capabilities of your heads, spec'ing a cam to go with those heads as a crap shoot. If you can spend the cheese to continually buy and swap cams, you can pull a head and have it flowed.
Jus' sayin'.....
KW
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Melting Slicks
Joined: Jun 2005
Posts: 2,396
Likes: 52
From: Sicamous BC
I agree 100% with KW, it is was a thread on LS1 regarding stall that raised my suspicions of my cylinders holding the motor back. Some blew it off, if you go past this forum & LS1 & dig deeper the results will speak for themselves.
Cylinders heads make the motor, yes I'm cathedral vs rect port. Doesn't matter they both will make power if they work as KW is describing.
Cylinders heads make the motor, yes I'm cathedral vs rect port. Doesn't matter they both will make power if they work as KW is describing.
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Joined: Dec 1999
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From: Texas Speed TX
Not sure if they are GM ported heads or the PRC ported heads, but I've seen both make good power. Not as good as the aftermarket casting PRC stuff of course, but good none the less. Just about every heads cam LS3 Camaro makes 500+rwhp with prc porting on the stock castings & a TSP camshaft.
If you'd like to try a different camshaft let me know. I'll help ya get something together to try.
Jason
Texas Speed
www.texas-speed.com
If you'd like to try a different camshaft let me know. I'll help ya get something together to try.
Jason
Texas Speed
www.texas-speed.com
Thread Starter
Instructor
Joined: Jan 2010
Posts: 166
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Not sure if they are GM ported heads or the PRC ported heads, but I've seen both make good power. Not as good as the aftermarket casting PRC stuff of course, but good none the less. Just about every heads cam LS3 Camaro makes 500+rwhp with prc porting on the stock castings & a TSP camshaft.
If you'd like to try a different camshaft let me know. I'll help ya get something together to try.
Jason
Texas Speed
www.texas-speed.com
If you'd like to try a different camshaft let me know. I'll help ya get something together to try.
Jason
Texas Speed
www.texas-speed.com