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If you are going back to stock rocker, you could do a Straub bushing trunion upgrade, I would stay away from needle bearing trunion upgrades
Thanks for the heads up on that. I did some quick research on this and asked my Engine tech this morning about the value of adding the Staub bushing Trunion upgrade. He was familiar with it, recommended it and had it is stock so we are adding it today!
bossdog - did the shop say what your dyno numbers were? inquiring minds want to know! Post a dyno sheet if you get one.
I am headed there in the morning. I will post the base line and new dyno numbers tomorrow night. I believe they use a dynoJet dyno.
423 whp @ 6250 rpm
390 ft/lbs Tq @ 4700 rpm.
My goal was to pack as much Tq between 2500 rpm and 5000 rpm as possible. He said I gained across the full power curve, 2000 rpm to 6000 rpm, I just don't know where and how much.
I'm like a kid going to bed on Christmas eve
It is worth noting that the base line was done under slightly different conditions. Also, the engine was missing slightly and the tune running rich. Once the valve train was opened up, we found 5 broken inner springs ( of the dual springs installed) and 1 of the outer springs broken. I'm not sure how the engine had not already gernaded. So, all the gains may not be attributable to the cam change.
Cam Motion Titan 3 Max HP, 423 @ 6250 rpm______________ Vengeance VXR5 max HP 425 @ 6425 rpm
It is worth noting that the base line was done under slightly different conditions. Also, the engine was missing slightly and the tune running rich. Once the valve train was opened up, we found 5 broken inner springs ( of the dual springs installed) and 1 of the outer springs broken. I'm not sure how the engine had not already gernaded. So, all the gains may not be attributable to the cam change.
Cam Motion Titan 3 Max HP, 423 @ 6250 rpm______________ Vengeance VXR5 max HP 425 @ 6425 rpm
Looks like a nice healthy combo! Thank you for the business!
Thanks for posting your results. It's looking more and more like what I want to use will be something in the 218 to 220 degree range (similar to the Titan 1 that was suggested). I'm looking for a very linear torque curve and my goal (380-400) is similar/not much more than what people seem to obtain with a C5 Z06 and bolt-ons (I have kooks 1-7/8" LTs on the way and will be picking up a pair of 243 heads soon).
Thanks for posting your results. It's looking more and more like what I want to use will be something in the 218 to 220 degree range (similar to the Titan 1 that was suggested). I'm looking for a very linear torque curve and my goal (380-400) is similar/not much more than what people seem to obtain with a C5 Z06 and bolt-ons (I have kooks 1-7/8" LTs on the way and will be picking up a pair of 243 heads soon).
So I'm finally resurfacing this thread (it's been a long year but I'm finally getting around to doing a cam).
As the car sits currently:
2004 C5 Coupe, manual, 3.42 gear, 1-7/8" headers, 90mm LS6 intake, LS2 243 heads (no porting)
I've talked to BTR, Cam Motion, Comp, and LG Motorsports trying to decide which way to go. I'd appreciate some unbiased input.
- BTR recommended their Stg 2 (227/234 113+2)
- Cam Motion recommended either their Titan 3 (224/228 113+4) or 4 (227/234 113+4), though pointed me more towards the 3
- Comp recommended 54-453-11 (219/235 113+4)
- LG suggested their G5X3 (23x/24x 114)
TO ME, the G5X3 seems WAYYYY to big as I've experienced going "too big" and perhaps that's making me "big cam shy" (I had a BIG solid roller 388 years ago, fun at the track but sucked on the street). Yet, I read people love it.
I'm not looking for any specific power number (couldn't care less what "number" is makes), I'm looking for a broad power cam that is going to pull well across the entire power band. It's not a "daily driver" but it's definitely a street car. I take it on day trips, sometimes to work, play on the weekends, etc. I certainly DON'T want a stock idle, but then again I'm not trying to have a pro stock idle either. I'm looking to get into autocross here next year, so that's something to think about as well.
Of the 4 I'd stick with BTR or one of the CamMotion grinds .
1/4 mile the 227/234s will likely be faster, the 224/228 maybe a bit more fun on the street with a bit more power down low. The 227s won't be hurting down low. A close friend is running HPDEs on 3.42s, CamMotion 227/234, 243 LS6 heads, FAST92, Straub trunion, BTR springs, and 1 3/4 dynatech LTs. It has run great.
I wouldn't say there is a wrong answer, just your own goals.
Titan 3 for what you're looking for. I've got a BTR Stage 2, and it's a bit more high winding. Still has great power everywhere, but it really comes alive above 4k RPM. Titan 3 would be pretty ideal for the street.
"Unbiased input" Hmmmm, Not sure that's available!
I really enjoyed researching cam's before I did mine, as you could probably see from all the posts above. I really like my Cam Motion Titan 3. I replace the Vengence VRX5. It had a very aggressive rumble/shake, too much for me, and, most of the power gains were above 5000 rpm. I don't know about you but I find it hard to get the car to 5000 RPM on the street except maybe the occasional on ramp.
Have you played with the Cam motion timer? I found it very helpful. I'm a complete novice but like most Novice, I'm more than happy to share what little I know.
The overlap number in the Cam Motion timer will give you an indication of the lope in the idle and also when the power is likely to come into the power band. The higher the overlap, the higher the RPM will be when the power kicks in.
Stock cam, plugged into the timer gives a -7 overlap. My Vengeance VRX5 had a +11 overlap. I was nearly the slowest car at any autocross event. When I opened up the valve train I did find 7 inner springs broken and one cylinder had both the inner and outer broken, so it wasn't all the cams fault.
I Digress!
If you want quickness, IMO, I'd keep the overlap at 0 to negative.
At zero overlap my Titan 3 has plenty of rumble and shake for me. It will make the Hula Girl's skirt go round!
The BTR you have listed is a +9.5 over lap. I can say I didn't like +11 driving around the street, but everyone is different.
Titan 4 is +4.5 overlap
The Comp cam is a +1 overlap
Al lot of other factors come in to play, its very complicated and way above my head. So, I used the cam timer to guide me and as it worked out, I really like my choice, Hence, no unbiased guidance. I hope some of this is helpful.
Good Luck, have fun!
10-31-2017, 08:32 PM
