The Beast in Me...

[L31MaxExpress]

I have a buddy that spent $$$$$$$ on a 6L swap to replace his Vortec 350 in his C1500. It has ported, milled heads, thumpy cam, trailblazer ss intake manifold, and long tube headers. Put down 345 RWHP through a 4L80E in 2nd gear unlocked. The thing does not impress me at all.

Then again I think the reason it does not impress me is the fact my Infiniti sedan with its stock V8 I bought with 60,000 miles on it for less than $25,000 put down 378 RWHP and 390 RWTQ on the same dyno. Swapped K&N filters into it, bumped the ignition timing 2* and it put down 390 RWHP and 410 RWTQ. Idles dead smooth and gets 26 mpg highway in a 4,400 lbs car that ran 12.90s stock.

 

[94burbk1500]

I have a buddy that spent $$$$$$$ on a 6L swap to replace his Vortec 350 in his C1500. It has ported, milled heads, thumpy cam, trailblazer ss intake manifold, and long tube headers. Put down 345 RWHP through a 4L80E in 2nd gear unlocked. The thing does not impress me at all.

Then again I think the reason it does not impress me is the fact my Infiniti sedan with its stock V8 I bought with 60,000 miles on it for less than $25,000 put down 378 RWHP and 390 RWTQ on the same dyno. Swapped K&N filters into it, bumped the ignition timing 2* and it put down 390 RWHP and 410 RWTQ. Idles dead smooth and gets 26 mpg highway in a 4,400 lbs car that ran 12.90s stock.

I find it hard to believe that a cammed 6.0 only put out 345 whp. A stock lq4 is good for 300 at the flywheel and an lq9 is good for 345. A good cam and tune can pump out another 100hp easy, been done time and time again. Are you telling me that he has such a bad setup that he lost 100 hp from flywheel to axle?

 

[BowtieBrody]

I wonder, do kids of this generation even desire or dream of a big block build, its been the 6.0 ERA since 2001.

Is a BBC a fictional Beast...?

View media item 31707
View media item 31708

LS swaps are cool and all, and there's a few members on here who have some pretty badass trucks running LS engines, but I like my old caveman Vortec big block.
I've got a 96 454 as my daily and I love it. I dig your Suburban too, what's the plans for it?

How's the quality on those headers? I've been mulling around between shelling out for Gibsons or trying to make a set of Hedman headers work.

 

[L31MaxExpress]

I find it hard to believe that a cammed 6.0 only put out 345 whp. A stock lq4 is good for 300 at the flywheel and an lq9 is good for 345. A good cam and tune can pump out another 100hp easy, been done time and time again. Are you telling me that he has such a bad setup that he lost 100 hp from flywheel to axle?

His engine is 450-460 at the flywheel. 4L80E/9.5" 14-bolt is 25% loss. Stock LQ4/4L80E trucks put down 240-260 rwhp on the dyno. 4L60E and an 8.5 is about 18% loss. Add in a transfer case if 4x4 or a carrier bearing and an extra U-joint if LWB and the losses get even worse.

 

[94burbk1500]

His engine is 450-460 at the flywheel. 4L80E/9.5" 14-bolt is 25% loss. Stock LQ4/4L80E trucks put down 240-260 rwhp on the dyno. 4L60E and an 8.5 is about 18% loss. Add in a transfer case if 4x4 or a carrier bearing and an extra U-joint if LWB and the losses get even worse.

Sounds like his real problem is the auto trans.

 

[slowburb]

Sorry guys. Bigblocks are wayyyyyyyyyy cooler than late model chevy "LS" motors.

 

[94burbk1500]

Sorry guys. Bigblocks are wayyyyyyyyyy cooler than late model chevy "LS" motors.

Not really, they run wayyy hotter.

 

[someotherguy]

I have a buddy that spent $$$$$$$ on a 6L swap to replace his Vortec 350 in his C1500. It has ported, milled heads, thumpy cam, trailblazer ss intake manifold, and long tube headers. Put down 345 RWHP through a 4L80E in 2nd gear unlocked. The thing does not impress me at all.

Wow, whoever chose the parts for that build and did the tune did a bad job.

Richard

 

[L31MaxExpress]

Not really, they run wayyy hotter.

Says who? If you have the correct size radiator core, a good mechanical fan and a proper shroud they run every bit as cool as a smallblock. The big block does not have to work nearly as hard as the small block to move the same weight. My old 83 G20 has a factory radiator for a 1988 454 G30 van with the OEM oil cooler and trans cooler in the passenger tank. I run the OEM small block fan shroud and a cooling fan/clutch from a Vortec 4.3 S10.

 

[94burbk1500]

Says who? If you have the correct size radiator core, a good mechanical fan and a proper shroud they run every bit as cool as a smallblock. The big block does not have to work nearly as hard as the small block to move the same weight. My old 83 G20 has a factory radiator for a 1988 454 G30 van with the OEM oil cooler and trans cooler in the passenger tank. I run the OEM small block fan shroud and a cooling fan/clutch from a Vortec 4.3 S10.

Aside from anecdotal evidence, I don't really have anything to back that up, I was being a smart ass.