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5.3 with comp 228R

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Old 11-19-2014, 07:06 PM
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love to see the forum working the way it should
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Old 11-20-2014, 06:56 AM
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Originally Posted by jakej152
Ahh nice save! Did they change the piston design for the newer 5.3 when they gave it the 799 heads to have the same CR as the old ones? Well looks like cold air intake and headers for now. Hopefully 350-360rwhp afterwards. Will post after it's done!
It looks like the l33 had a higher lift camshaft and a compression ratio of 9.9:1 vs 9.5:1 on the iron 5.3s.
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Old 11-20-2014, 07:02 AM
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The 5.3 with the 799 heads have the same flat top pistons as the 4.8. That is why the compression bump.
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Old 11-20-2014, 05:14 PM
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you defanitly need to free up that exhaust, that's a big cam for that truck and a stock converter. in my old L33 with a TSP220 I had a 3200 and wish it had a 3600.
tires rob a lot of power, ask me how I know. lol
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Old 11-20-2014, 06:37 PM
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Originally Posted by GREENSIERRA
you defanitly need to free up that exhaust, that's a big cam for that truck and a stock converter. in my old L33 with a TSP220 I had a 3200 and wish it had a 3600.
tires rob a lot of power, ask me how I know. lol
With 4.11 gears the tires would rob that much power you think? To dyno at 270? How was the streetability of your 3200 stall converter?
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Old 11-20-2014, 08:40 PM
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I have 5.38 gears and 36"s, rotating mass eats up a lot of power.
with the 3200 you could barely tell I had a stall until I went WOT. towed with it and DD the truck with no problems. just get a good cooler
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Old 11-20-2014, 08:47 PM
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Originally Posted by jakej152
With 4.11 gears the tires would rob that much power you think? To dyno at 270? How was the streetability of your 3200 stall converter?
If you're keeping the 33's, I'd recommend 4.56 gears.
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