How far off are my dyno #s?
Thread Starter
TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
How far off are my dyno #s? How far off are my dyno #s?
Setup is:
LS1 (Forged Pistons)
-Stock LS6 heads
-HPE S-Cam (238/242, .608/612 on a 115 LSA)
-Underdrive Pulleys
-Long Tubes
-Lid
-Cutout
-Ported Throttle Body
-Ported Oil Pump
-Double Roller Timing Chain
-NGK Plugs
-MSD Plug Wires
-Z06 Clutch/Slave
-3:42s/M6
-Tuned
I made 385 rwhp on dynojet. A few folks are telling me that those numbers are way too low. Where should I be? Now granted, when my car was dynoed it was with a bad TP sensor that was throwing the idle way off and also giving me 12-14 mpg. Does that have anything to do with the low numbers, I don't know. Now the sensor has been replaced and I haven't been able to get it back to the dyno. Thanks for your input.
Setup is:
LS1 (Forged Pistons)
-Stock LS6 heads
-HPE S-Cam (238/242, .608/612 on a 115 LSA)
-Underdrive Pulleys
-Long Tubes
-Lid
-Cutout
-Ported Throttle Body
-Ported Oil Pump
-Double Roller Timing Chain
-NGK Plugs
-MSD Plug Wires
-Z06 Clutch/Slave
-3:42s/M6
-Tuned
I made 385 rwhp on dynojet. A few folks are telling me that those numbers are way too low. Where should I be? Now granted, when my car was dynoed it was with a bad TP sensor that was throwing the idle way off and also giving me 12-14 mpg. Does that have anything to do with the low numbers, I don't know. Now the sensor has been replaced and I haven't been able to get it back to the dyno. Thanks for your input.
Last edited by anLS1x2; Aug 24, 2006 at 07:01 AM. Reason: TP sensor instead of throttle body sensor
my uneducated guess would be your cam is too big and the 115 lsa isn't helping either.even so you seem to be down around 30 rw.i would think a cam that big would clear 400 rw easily ,but your dcr is way low so that may be the problem.
CAM GURUS INSIDE PLEASE !
CAM GURUS INSIDE PLEASE !
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Thread Starter
TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
Originally Posted by slow trap
my uneducated guess would be your cam is too big and the 115 lsa isn't helping either.even so you seem to be down around 30 rw.i would think a cam that big would clear 400 rw easily ,but your dcr is way low so that may be the problem.
CAM GURUS INSIDE PLEASE !
CAM GURUS INSIDE PLEASE !
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TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
Originally Posted by slow trap
with a cam that size on stock heads i would think you should be over 415 rw easily tuned with 380 rwtq.
WOW! So what does that mean that my Heads/Cam/Bolt-on car will make? 
I hope to have it over there next week, so I will post up the results. 
Originally Posted by anLS1x2
.... He just told me that he has tuned S-Cam/Bolt-on only cars at 460 rwhp!!! WOW! ...
WOW! ... Thread Starter
TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
Originally Posted by Trust
S-Cam?
Originally Posted by Trust
I hope he didnt say this was on stock heads/intake. There is no way a cam only bolt on car is making more than 420RWHP. You need a re-tune with a good sensor etc.
Originally Posted by Trust
S-Cam? I hope he didnt say this was on stock heads/intake. There is no way a cam only bolt on car is making more than 420RWHP. You need a re-tune with a good sensor etc.
Thread Starter
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Joined: Jan 2002
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From: Bellville, Texas
Originally Posted by lilbuddy1587
The 460rwhp S-cammed car is an ls2 GTO. So very believeable, but the cam IMHO is garbage.
In a nutshell:
Chuck and Eric from HPE = Badass tuners, builders and racers.
HPE S-Cam in a low compression cam-only LS1 = Bad
Why? Intake valve closing point is way too late for a 346, which lowers dynamic compression and tries to force a power peak past the harmonic resonance of the LS6/FAST intake. The exhaust valve opening is too early for a naturally aspirated 346 which will bleed off cylinder pressure too early during the power stroke.
I don't know why people buy this cam for a cam-only 346. It's much better suited for a large displacement motor running a power adder, but not a low compression, small displacement naturally aspirated motor.
Chuck and Eric from HPE = Badass tuners, builders and racers.
HPE S-Cam in a low compression cam-only LS1 = Bad
Why? Intake valve closing point is way too late for a 346, which lowers dynamic compression and tries to force a power peak past the harmonic resonance of the LS6/FAST intake. The exhaust valve opening is too early for a naturally aspirated 346 which will bleed off cylinder pressure too early during the power stroke.
I don't know why people buy this cam for a cam-only 346. It's much better suited for a large displacement motor running a power adder, but not a low compression, small displacement naturally aspirated motor.
__________________
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.
Originally Posted by anLS1x2
I'm curious as to why you don't believe in the S-cam? Did you or someone you know have a bad experience with one?
Thread Starter
TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
Originally Posted by Patrick G
In a nutshell:
Chuck and Eric from HPE = Badass tuners, builders and racers.
HPE S-Cam in a low compression cam-only LS1 = Bad
Why? Intake valve closing point is way too late for a 346, which lowers dynamic compression and tries to force a power peak past the harmonic resonance of the LS6/FAST intake. The exhaust valve opening is too early for a naturally aspirated 346 which will bleed off cylinder pressure too early during the power stroke.
I don't know why people buy this cam for a cam-only 346. It's much better suited for a large displacement motor running a power adder, but not a low compression, small displacement naturally aspirated motor.
Chuck and Eric from HPE = Badass tuners, builders and racers.
HPE S-Cam in a low compression cam-only LS1 = Bad
Why? Intake valve closing point is way too late for a 346, which lowers dynamic compression and tries to force a power peak past the harmonic resonance of the LS6/FAST intake. The exhaust valve opening is too early for a naturally aspirated 346 which will bleed off cylinder pressure too early during the power stroke.
I don't know why people buy this cam for a cam-only 346. It's much better suited for a large displacement motor running a power adder, but not a low compression, small displacement naturally aspirated motor.
Originally Posted by lilbuddy1587
The 460rwhp S-cammed car is an ls2 GTO. So very believeable, but the cam IMHO is garbage.
EDIT: Ok, I just re read it and saw he has LS6 heads, my mistake!
Thread Starter
TECH Regular
Joined: Jan 2002
Posts: 434
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From: Bellville, Texas
Well I had the car re-tuned and re-dynoed on Tuesday. I'm bummed. It was dynoed with the cap on the cutout and in 100+ degree weather. I sure hope it is putting down at least 400 with the cap off and in cooler weather. Like everyone says, "Take it to the track - dynoes don't mean nothing." 
