Decided to start a new thread for these. Here are my before and after dyno sheets from my stage 3 Comp cams. Gained 28 rwhp. As for the seat of the pants - yes, I definately do feel a nice improvement. Before anyone starts an "it's in your imagination" flame, I have been into performance for years, have hed a few nice muscle cars and am too old for fantasies. The car pulled much harder on the dyno after the cams were in. The car sounds awesome. I have hit the rev limiter at 6850 a couple of times since with the shift light at 6200. Never had to think about it before, but now the car revs and accelerates faster to the point that I am going to have to re-learn my shift timing for a few days. I am going to go back to my CMR tuner to get the dyno tune tweaked for the cams, which should net even better results. I had to add 4% in the lower rpm range and 8% in the upper range in the fuel tables. The cams had leaned out the engine to a little more than my comfort zone. These changes put me back at 12.8 and 12.9 A/F readings. I am also attaching a vid clip of the idle. Sorry the sound quality is poor, just turn the sound way up. I have a vid of one of the dyno runs, but need to edit it for hosting.
He's not wrong about that sound! At idle the car sounds awesome with a very perceptable lope, but on the dyno it seemed to pull forever, redline is up there and the only car I thought gave serious compitition in the sound department during pulls was a Wildhorse Member's late model Cobra that put down about 400 RWHP and only has a cold air kit added. That factory blower was singing a sweet song too, what do you like blower sound or old school cam sound - both build solid wood
Impressive dude and what I'm anxious to see is the difference at the track, that will be very interesting!
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2006 Roush convertable Stage "X"
Whipple HO polished SC
460 RWHP & 433 RWTQ
14" drilled & slotted Wilwood brakes 4 wheels
Roush Suspension - Steeda extras
B&M shifter
CHE K-member Torque Limiter
20" wheels
SLP Longtubes & X Pipe w Hi
I like the torque in the end it is a real improvement on torque in the top end, doesn't fall as steep as stock. 30hp is nice but it is 2 linear at end going up. So this is stage 3 comp cams from brent right? Which is the highest you can get if you are going under psi in the long run?
Although I had said this in my install thread, again, I want to thank Brenspeed for there unbeatable customer service. They were there for me every step of the way and never hesitated to offer assistance and advice. Brent and Dave - You guys are awesome!
Just so I understand this right, you gained close to 30rwhp, but only like 3-4 lbft of torque from the cams...what gives? I would have thought that the torque and hp gains would have been close to each other
Nope. The cams upped his powerband into higher rpms giving him the top end horsepower. Basically, he launches close to the same as before, but he can stay in gear longer and accelerate faster in the top end than before. I believe he also said that he hasn't custom tuned the cams yet. He may get more out of them.
The dyno numbers are one thing, but I think the real payoff here will be at the track.
Getaway is correct, his car seemed to pull and pull on the dyno the other day. Most were over in 5 to 7 seconds, but Musiccity's pulled much further and just sounded awesome! I'm sure when he's racing someone, they'll have to upshift way before him and he'll still be building HP! Probably be a learning curve to get used to it and not shortshift by instinct.
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2006 Roush convertable Stage "X"
Whipple HO polished SC
460 RWHP & 433 RWTQ
14" drilled & slotted Wilwood brakes 4 wheels
Roush Suspension - Steeda extras
B&M shifter
CHE K-member Torque Limiter
20" wheels
SLP Longtubes & X Pipe w Hi
You got it Zcat! The torque curve is higher in the band and does not drop out as fast or as soon. You are only in the lower band at launch which is good. Maybe I can retain those 1.68 60 foots and then as I am shifting I am still in the higher rpm band where the sweetspot of these cams is. This thing makes power to 6700+. I am going to have to go from my normal 6300 shift point to 6600. Like you mentioned, it just kept pulling on the dyno after others fell off.
It looks like I will be going to Alabama in the near future. A major tuner there has offered to develop a custom dynotune for me. Sweetheart of a deal. I buy the new tuner, they do all of the tuning, and I only pay for the tuner, not the dynotuning, and only if I am completely satisfied with the results. Win - win situation I'd say!
How much more Power do you think a custom tune could pull from that? Are you thinking about having porting done in the near future?
I like the way that dyno sheet looked, I wonder if that would be to much cam for Forced Induction?
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06 Performance white GT
18" fan wheels
23% tint
Xcal 2 w/JLT 2 Tuned
280.34RWHP & 293.93RWTQ
FRPP 4.10s
Dyno sheets from Comp stage 3 install
The car pulled much harder on the dyno after the cams were in. The car sounds awesome. I have hit the rev limiter at 6850 a couple of times since with the shift light at 6200. Never had to think about it before, but now the car revs and accelerates faster to the point that I am going to have to re-learn my shift timing for a few days. I am going to go back to my CMR tuner to get the dyno tune tweaked for the cams, which should net even better results. I had to add 4% in the lower rpm range and 8% in the upper range in the fuel tables. The cams had leaned out the engine to a little more than my comfort zone. These changes put me back at 12.8 and 12.9 A/F readings. I am also attaching a vid clip of the idle. Sorry the sound quality is poor, just turn the sound way up. I have a vid of one of the dyno runs, but need to edit it for hosting.
Win - win situation I'd say!
