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#1
12-11-2011, 03:07 PM
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5.3 vs. 6.0
This is all hypothetical of course..
Both engines are using stock short blocks, aftermarket cam, heads have just clean up work done, Edelbrock carb intake, appropriate sized carb. Both have properly setup valvetrains. 5.3 makes peak power at 7500rpm 6.0 makes peak power at 6500rpm How close would they run together? I know the displacement hurts the 5.3 but the added RPM will help a bit. At what point do stock castings fall on their face and prohibit more power?
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9" 
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#2
12-11-2011, 03:56 PM
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running 5.3 heads on the 6.0 Or running stock 6.0 heads? and what 6.0 LQ4 or 9? makes a WORLD of difference.
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 1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore.  BAAAAAA!!!!!!
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#3
12-11-2011, 04:06 PM
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my pal has 5.3 heads on an lq.
I look at the 5.3 as the modern 327 and the 6.0 as the 396 or 350.
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 95 Z28 hard top - LT1 | 4L60e | bolt ons | Yank SS3600 | suspension | viking coil overs | 3.42 10 bolt | 3520 lbs - 12.331 @ 108.22mph 1.668 60' 08 Saab 9-7x - L96 6.0 swap | L92 heads/intake/TB | LS6 cam | LS9 springs | 7.425" hardened pushrods | CAI | 1-3/4" stepped LT's | catback | 4L60E | FTI 3000 278mm converter
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#4
12-11-2011, 06:15 PM
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But being all stock heads and everything else the same and of course this is oppinion i'd say about 100 hp difference and about 1 second faster in 1/4.
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 2000 SS Procharger 98 Z vert turbo 07 TB SS cai catback and tune
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#5
12-11-2011, 06:36 PM
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Stock heads on both, I know 5.3 heads would help the other engine to a point. I didnt think the difference would be terrible but if you think a second then screw that lol
Both blocks are iron as well
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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#6
12-11-2011, 08:03 PM
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Quote:
 J/K man 
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#7
12-11-2011, 09:06 PM
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**I HAVE ZERO INTENTIONS TO DO A LSx SWAP**
Its just been going through my head a bit how close it would be. You see a lot of 6.0 swaps and some 5.3 Turbo swaps but I'm more curious as to how they would compete N/A. RPM can really help a engine like the 5.3
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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#8
12-11-2011, 09:07 PM
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Quote:
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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