Good or Bad? Take a look at the graph.
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Teching In
Joined: Oct 2005
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Good or Bad? Take a look at the graph. Went to the dyno today. I drove 1hr to the shop, pulled strait onto the lift, and ran 3 consecutive runs in 12 min. All three runs were within 2 hp of each other, and 1ft-lbs torque. I should have been more patient and waited to cool down to get a higher number, but I wanted it to be dynoed like it was running on the street. For the previous 4 months I have been messing with HP Tuners and a wideband.
Mods are as follows: 3.90 rear, Vararam, LT headers, and cam.
The cam specs are:
INTAKE EXHAUST
Gross Valve Lift .591 .605
Duration at .006 279 287
Duration at .050 230 238
Lobe lift .3480 .3560
Lobe Separation 114.0
Open Close
Valve Timing INT 5 BTDC 45
EXH 57 BBOC 1
The strait line is 13 afr, I was shooting for 13.1, so it's pretty close.
edit: just checked the log, and the water temp was 205F, and the oil temp was 216F. I got no KR at 29* timing.
So what do you think? Is it on par?
Jeremy
Mods are as follows: 3.90 rear, Vararam, LT headers, and cam.
The cam specs are:
INTAKE EXHAUST
Gross Valve Lift .591 .605
Duration at .006 279 287
Duration at .050 230 238
Lobe lift .3480 .3560
Lobe Separation 114.0
Open Close
Valve Timing INT 5 BTDC 45
EXH 57 BBOC 1
The strait line is 13 afr, I was shooting for 13.1, so it's pretty close.
edit: just checked the log, and the water temp was 205F, and the oil temp was 216F. I got no KR at 29* timing.
So what do you think? Is it on par?
Jeremy
Last edited by oupike1757; Apr 25, 2006 at 08:30 PM.
On The Tree
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I think this is a Corvette because you mentioned the Vararam. The power number looks good but the torque looks a little low. My friend did 385wtq on his full-bolt on Z06 but I don't know if this is an LS1 or LS6.
Your TQ and HP seem to cross early, mine does that aswell, but... my cam has timing ground into it. I think for a cam only LS6 your doing pretty good, what mufflers are on the car?
Thread Starter
Teching In
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Originally Posted by Trust
Your TQ and HP seem to cross early, mine does that aswell, but... my cam has timing ground into it. I think for a cam only LS6 your doing pretty good, what mufflers are on the car?
It has Borla mufflers, but they give no performance benefits over the factory TI.
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Teching In
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All dyno sheets should show the HP & TQ crossing at 5250. The definition of TQ is HP*Rpm/5250. The dyno measures the acceleration rate of the inertial mass. By connecting the spark pickup sensor to read engine Rpm, the software calculates TQ.
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Kinda hard for me to see but are those numbers 395rwhp and 356rwtq??? If so then the hp is just fine. You do have low tq peak but a decent band but i still wonder why it would've peakedso low. I'd have thought more like 375+peak rwtq but some cars are just different. Someone w/ a hellva lot more experience might chime in as to why the rwtq is relitivly low.
I don't believe your cam is in correctly. Although you may have installed it dot to dot, it appears to be retarded many degrees. Torque is too low down low and hp peak is too high in rpm range. Mismatch with intake manifold.
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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.
Thread Starter
Teching In
Joined: Oct 2005
Posts: 33
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Originally Posted by Patrick G
I don't believe your cam is in correctly. Although you may have installed it dot to dot, it appears to be retarded many degrees. Torque is too low down low and hp peak is too high in rpm range. Mismatch with intake manifold.
How retarded are we talking? It is a lot of work in these cars to pull the cam back out. Is this something I should worry about or just leave well enough alone? If it will only net me 5-10hp, I'm way out on messing with it.
Thanks for your input.
Jeremy
