RCSB Performance ?
04-17-2009, 08:49 PM
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RCSB Performance ?
Had an 08 CCSB 2wd Vortec max with 20s and 3.73 rear. I sold the truck for many reasons, one of which was it was just a turd. Even tuned, the truck was a disappointment driving around town. It just lacked the torque to please me. Currently have a Titan. It definitely performs well in the drivetrain department, but I find myself missing the comfort and interior of the Chevy. Considering getting a RCSB 4.8 or 5.3. I know there are plenty of guys running high 13s with their 5.3s, but do these trucks perform well under 3000 rpm?
Things I disliked about the 6.0 (tuned)
1) It didn't come alive until 4000rpm or so
2) Couldn't spin the tires
3) Downshift to pass and you had to floor it to accelerate
4) Damn thing wouldn't cross the bridge over Lake Charles unloaded without downshifting
I have no interest in going to the track, just want a truck with good mid range power.
Things I disliked about the 6.0 (tuned)
1) It didn't come alive until 4000rpm or so
2) Couldn't spin the tires
3) Downshift to pass and you had to floor it to accelerate
4) Damn thing wouldn't cross the bridge over Lake Charles unloaded without downshifting
I have no interest in going to the track, just want a truck with good mid range power.
04-17-2009, 09:42 PM
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Mine doesn't come alive before 3600 rpm; but that's what the converter flashes to 
Honestly most of the newer trucks don't have a lot of bottom end because of their small displacements. A 5.3 with a custom ground cam should do pretty nicely in the mid range though if it is set up and tuned correctly; not as good as a 6.0 but decent.
Honestly most of the newer trucks don't have a lot of bottom end because of their small displacements. A 5.3 with a custom ground cam should do pretty nicely in the mid range though if it is set up and tuned correctly; not as good as a 6.0 but decent.
04-17-2009, 10:48 PM
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bottom line- SBC's are very torquey down low, and in stock form hold a relatively low rpm range for peak power.
Newer LS based engines have peak power alot higher in the RPM range and not a whole lot of torque down low (3k or under). For the typical application they are good enough though, and typically out perform most other comparable trucks when it comes to towing and whatnot.
Newer LS based engines have peak power alot higher in the RPM range and not a whole lot of torque down low (3k or under). For the typical application they are good enough though, and typically out perform most other comparable trucks when it comes to towing and whatnot.
04-18-2009, 08:33 AM
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I have full bolt-ons on my 07 5.3 3:73's it dynoed 298 hp and 324 torque on a mustang dyno, and the truck will not get out of the hole if it's life depended on it. It doesn't wake up till about 3500 rpms. My best 60ft was 2.2 and an e.t of 14.45 @ 97mph
04-18-2009, 09:20 AM
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Well thats a little depressing. The 5.6 in the Titan makes 380ish ft lbs at 3600 and the curve is pretty flat below that. Guess I will go drive a RCSB 5.3 but it sounds like I will be disappointed.
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04-18-2009, 10:54 AM
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Isn't there a few guys who can tune the titan? I saw a guy on the internet running low 12's with bolt ons, but nissan didn't want to deal and I got a GMC.
I am personally debating on keeping 17's with 275-60-17 rubber to help my hole shot instead of going to 22's. Plus either tire will be way better then stock, and I really prefer performance to looks.
I am personally debating on keeping 17's with 275-60-17 rubber to help my hole shot instead of going to 22's. Plus either tire will be way better then stock, and I really prefer performance to looks.