5.3 with comp 228R

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Nov 19, 2014 | 07:06 PM

#21

TXsilverado

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From: Humble Texas

love to see the forum working the way it should

Nov 20, 2014 | 06:56 AM

#22

07bluelbz

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From: Beaumont,Texas

Quote:

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.

Nov 20, 2014 | 07:02 AM

#23

gagliano7

TECH Resident

Joined: Aug 2005

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From: warwick,ny

The 5.3 with the 799 heads have the same flat top pistons as the 4.8. That is why the compression bump.

Nov 20, 2014 | 05:14 PM

#24

GREENSIERRA

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Joined: Mar 2006

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From: Canada

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

Nov 20, 2014 | 06:37 PM

#25

jakej152

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Quote:

Originally Posted by GREENSIERRA

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?

Nov 20, 2014 | 08:40 PM