Torque coming out of my EARS! (cam change)
#362
I just took time over the past two days and read this entire thread and I believe I am walking away with a lot more knowledge than I walked in with.
I appreciate all of the input from everyone, and I will be taking most (can't take all) of it into account when I order a cam in a month or so.
I appreciate all of the input from everyone, and I will be taking most (can't take all) of it into account when I order a cam in a month or so.
#363
Just wanted to give an update on my noise issues. I finally measured for pushrods and ended up buying some 7.350" pushrods. They quieted things down considerably, and already it is much more enjoyable without all of the added engine noise. Weird, you would think excessive valvetrain noise would be caused by too short of pushrods not too long of them.
The heads are ported. I don't have a complete flowsheet, but when I bought them I was given a few of the numbers, and they were right around 310 and 250-260 at useable lifts with this cam. I will get them flowed next time I pull them off, which shouldn't be until next winter now.
Anyways, I did not check PtV clearance as I was told there would be no way I could have any troubles with these cam specs. Haven't had a single problem though. Only have a few thousand miles on the setup, but so far so good.
Originally Posted by hammertime
Are your heads ported, or just milled? If you were able to get those numbers with stock heads that were just milled, that's fantastic!
Also, did you check PTV clearance. I know Patrick is running AFR heads that tend to have more clearance after milling than stock unmilled castings. You should be fine at this duration, but just curious.
Also, did you check PTV clearance. I know Patrick is running AFR heads that tend to have more clearance after milling than stock unmilled castings. You should be fine at this duration, but just curious.
Anyways, I did not check PtV clearance as I was told there would be no way I could have any troubles with these cam specs. Haven't had a single problem though. Only have a few thousand miles on the setup, but so far so good.
#364
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From: Victoria, TX
I just added an idle clip to my signature for anyone interested. You can hear how smooth the idle is (at 850 rpm). Some people expect a 110LSA to have a really hard chop to it. Mine is nice. You will also hear the underhood valve music (for those wondering how loud LSK lobes are with stiff springs).
Idle clip here
Idle clip 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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#365
WOW that sounds good LSK not even that bad. lopes less than my 233-239 113
i hope ol pat can help me get a cam figured out that will should that good and make soem AWESOME TQ HP for my 402
i hope ol pat can help me get a cam figured out that will should that good and make soem AWESOME TQ HP for my 402
Last edited by camarokid94; 01-01-2007 at 10:42 PM.
#368
Originally Posted by camarokid94
WOW that sounds good LSK not even that bad. lopes less than my 233-239 113
i hope ol pat can help me get a cam figured out that will should that good and make soem AWESOME TQ HP for my 402
i hope ol pat can help me get a cam figured out that will should that good and make soem AWESOME TQ HP for my 402
Natural that it lopes less
#369
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From: Victoria, TX
Originally Posted by Hennytime
that thing sounds great, btw im sorry if it was covered in the post prior, but how would the lsk lobes work with the stock 02 heads with the proper valvetrain of course
__________________
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#370
So in another thread I was looking to do an XE-R lobed cam, 226/230@.050, .585/.592 Lift w/ 108+1 LSA . After reading this entire thread, I've decided to switch specs to an LSK lobed cam, 220/224@.050, .632/.636 Lift w/ 108+2 LSA . Keeping in mind I want to shift under 6300 RPM and want great low end, will this cam work for me?
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#371
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From: Victoria, TX
Originally Posted by LS1Formulation
So in another thread I was looking to do an XE-R lobed cam, 226/230@.050, .585/.592 Lift w/ 108+1 LSA . After reading this entire thread, I've decided to switch specs to an LSK lobed cam, 220/224@.050, .632/.636 Lift w/ 108+2 LSA . Keeping in mind I want to shift under 6300 RPM and want great low end, will this cam work for me?
__________________
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#372
Yeah, I want a cam that makes a lot of power between 2500 and 4500 but still pulls like a **** up to redline. After reading how well your cam performed and the fact that it still pulled all the way to 6500 without having to use a lot of duration, I figured a slightly smaller grind would work great for what I wanted to do.
#373
Originally Posted by LS1Formulation
Yeah, I want a cam that makes a lot of power between 2500 and 4500 but still pulls like a **** up to redline. After reading how well your cam performed and the fact that it still pulled all the way to 6500 without having to use a lot of duration, I figured a slightly smaller grind would work great for what I wanted to do.
*ported heads
*high compression
*90mm intake
*cam is installed straight up
It might work, or it might crater by 5800 let us know. I would vote for straight up.
#374
Hmmm, you may be right there. I'm wondering though, why does my stock cam seem to pull all the way to redline even though it's only 198@.050? Is it because of the incredibly wide LSA? Does anyone know what the DCR is for a stock cam? I'm hoping I can spec this cam to actually gain a little torque over the stock cam down low and just annihilate it above 3000 RPM.
#376
Originally Posted by LS1Formulation
I'm wondering though, why does my stock cam seem to pull all the way to redline even though it's only 198@.050? Is it because of the incredibly wide LSA? Does anyone know what the DCR is for a stock cam?
#377
Originally Posted by 1989GTA
You could always retard the cam a couple of degrees to delay the IVC closing to raise the peak power. Sounds like maybe a custom cam would be in order.
#378
Well yeah, it's definitely going to be custom, lol. I don't think anyone has an off the shelf 108 LSA Comp grind with LSK lobes. I'm curious what the valve events are for a stock cam. Is there any place on the site I can look them up? I did a search but only found lift and duration figures.
#379
I'm guessing you found these:
Good luck finding the advertised durations. Also, the ramps are so much slower than even Comp XE lobes, that the actual intake valve closing point is much, much later than that tiny duration @ .050" would suggest. Using XE rates from .006 to .050, 116 + 0, and the DCR calculator, I get a 8.53:1 DCR. But I'm sure that the rate is much slower than 53 degrees from .006 to .050. I'd guess there is 10 more ramp opening and closing to keep the noise down. That gives a rate of 73 degrees, and a DCR of 7.88:1
Code:
Stock 98-00 trans am cam Duration@.050 198.86 intake 209.25 exhaust Lift .498 intake .497 exhausts LSA 119.45 Stock 01-02 trans am cam Duration@.050 196.37 intake 208.72 exhaust Lift .464 intake .479 exhausts LSA 115.92
#380
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Stock '98-00 F-body cam gives a 6.97:1 DCR based on these valve events from the Cam Doctor:
1998-2000 Stock F-Body Cam 0.006 0.050 0.200
Intake Duration - ID 284 199 113 stock cam
Exhaust Duration - ED 289 210 118 stock cam
Lobe Center Angle - LSA 119.5 119.5 119.5
Intake Centerline - ICL 119 119 119
Intake Valve opens - IVO 23 -19.5 -62.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 81 38.5 -4.5 ABDC
Exhaust Valve Opens - EVO 84.5 45 -1 BBDC
Exhaust Valve Closes - EVC 24.5 -15 -61 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 120 120 120
Overlap 47.5 -34.5 -123.5 degrees
1998-2000 Stock F-Body Cam 0.006 0.050 0.200
Intake Duration - ID 284 199 113 stock cam
Exhaust Duration - ED 289 210 118 stock cam
Lobe Center Angle - LSA 119.5 119.5 119.5
Intake Centerline - ICL 119 119 119
Intake Valve opens - IVO 23 -19.5 -62.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 81 38.5 -4.5 ABDC
Exhaust Valve Opens - EVO 84.5 45 -1 BBDC
Exhaust Valve Closes - EVC 24.5 -15 -61 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 120 120 120
Overlap 47.5 -34.5 -123.5 degrees
__________________
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.