Solid roller cam with hydraulic lifters gained 28 rwhp!
03-09-2009, 09:12 AM
#1
Solid roller cam with hydraulic lifters gained 28 rwhp! Since not everybody visits the Gen3 internal section, I have posted the results in here too.
I got a call several weeks ago from Coach 02 Z28 A3. He was going to be installing a fresh set of valve springs and timing chain on his 347 cubic inch bracket motor and thought a cam swap might be in order.
Coach's motor is a 13.5:1 forged 347 from LME that runs ported 5.3L truck heads, FAST intake, and a Cam Motion 244/249 .643/.644 112LSA +0 advance cam. He also runs a TH350 trans with a 5000 stall race converter. Needless to say, it's not built as a dyno queen, but a strip warrior. It's been a solid combo that has taken Coach to consistent 10.20s at 130mph. On 98Aggie's dyno, the combo put out 470rwhp/408rwtq.
After spending time with Billy Godbold at Comp Cams (their chief lobe designer) in December, he mentioned a family of solid roller lobes that were compatible with hydraulic lifters. He said very few people in the country were running them. According to Billy, these lobes have ramp rates that aren't as aggressive as some of the "square" hydraulic lobes, but they would rpm much better.
So after looking at Coach's current set, I decided that we could pick up some mid-range by having an earlier intake valve closing point and by using a longer exhaust lobe (with a higher revving solid roller lobe), we could carry power better after peak. The approach worked. The cam is a 245/254 .643/.648 111LSA +3 advance solid roller cam running stock rockers and Comp R hydraulic lifters. One half turn of pre-load. AFR 8019 dual valve springs.
The chart below shows the before and after of the cam swap. Same dyno. If you are wondering why there is a dual peak, remember, this is an unlocked torque converter. The 5000 stall converter does not couple up until 6500 rpm. After that, it's fairly efficient. Check out the better mid-range, the higher peak power and the extended power range. For those who can't read the chart, the before power was 470rwhp/408rwtq and the after was 498.9 rwhp/421.6 rwtq. All this from a cam that to the uneducated would look almost exactly like the one that got taken out. The moral of the story, don't look just at duration and lift when choosing a cam.
I got a call several weeks ago from Coach 02 Z28 A3. He was going to be installing a fresh set of valve springs and timing chain on his 347 cubic inch bracket motor and thought a cam swap might be in order.
Coach's motor is a 13.5:1 forged 347 from LME that runs ported 5.3L truck heads, FAST intake, and a Cam Motion 244/249 .643/.644 112LSA +0 advance cam. He also runs a TH350 trans with a 5000 stall race converter. Needless to say, it's not built as a dyno queen, but a strip warrior. It's been a solid combo that has taken Coach to consistent 10.20s at 130mph. On 98Aggie's dyno, the combo put out 470rwhp/408rwtq.
After spending time with Billy Godbold at Comp Cams (their chief lobe designer) in December, he mentioned a family of solid roller lobes that were compatible with hydraulic lifters. He said very few people in the country were running them. According to Billy, these lobes have ramp rates that aren't as aggressive as some of the "square" hydraulic lobes, but they would rpm much better.
So after looking at Coach's current set, I decided that we could pick up some mid-range by having an earlier intake valve closing point and by using a longer exhaust lobe (with a higher revving solid roller lobe), we could carry power better after peak. The approach worked. The cam is a 245/254 .643/.648 111LSA +3 advance solid roller cam running stock rockers and Comp R hydraulic lifters. One half turn of pre-load. AFR 8019 dual valve springs.
The chart below shows the before and after of the cam swap. Same dyno. If you are wondering why there is a dual peak, remember, this is an unlocked torque converter. The 5000 stall converter does not couple up until 6500 rpm. After that, it's fairly efficient. Check out the better mid-range, the higher peak power and the extended power range. For those who can't read the chart, the before power was 470rwhp/408rwtq and the after was 498.9 rwhp/421.6 rwtq. All this from a cam that to the uneducated would look almost exactly like the one that got taken out. The moral of the story, don't look just at duration and lift when choosing a cam.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
Trending Topics
03-09-2009, 08:26 PM
#11
Those are some very nice results from just a cam swap. These new lobes sound very nice. I'm going to have to keep them in mind.
On a side note that graph makes my head hurt. I don't know if it's the color blindness or the shape of it, but I fail at trying to comprehend that.
On a side note that graph makes my head hurt. I don't know if it's the color blindness or the shape of it, but I fail at trying to comprehend that.
03-09-2009, 09:19 PM
#14
Moderator
iTrader: (19)
Join Date: Jan 2004
Location: Mission Valley, TX
Posts: 2,241
Likes: 0
Received 0 Likes
on
0 Posts
Allways nice to take it 7600rpm with .648" lift and no signs of valve float.
Sorry for the first run not having a smooth line - had some interferance with the inductive pickup.
Sorry for the first run not having a smooth line - had some interferance with the inductive pickup.
03-10-2009, 11:56 AM
#20
Staging Lane
iTrader: (4)
Join Date: Mar 2007
Location: St. Paul, MN
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
This is insane power out of a stock cube ls1. The way that it holds power is crazy. I am building something similar and have a couple of quick questions:
1. Do you have any additional info on the engine as for internals or who did the heads etc. I am guessing it is a 59cc chamber with about a +10cc effective volume. Also was the intake ported and if so by who? If the owner does not want to discuss information on his setup I completely understand.
2. Is there any long term durability issues with this cam compared to a large lobed LSL cam?
3. Is there any real advantages that you have seen with running the compR's as opposed to a LS7?
4. Patrick you have mail
1. Do you have any additional info on the engine as for internals or who did the heads etc. I am guessing it is a 59cc chamber with about a +10cc effective volume. Also was the intake ported and if so by who? If the owner does not want to discuss information on his setup I completely understand.
2. Is there any long term durability issues with this cam compared to a large lobed LSL cam?
3. Is there any real advantages that you have seen with running the compR's as opposed to a LS7?
4. Patrick you have mail