04BlackSilverado

iTrader: (6)

Could i put the heads, cam and tune from a LQ9 on my 04 5.3L?
and would it make some power?

Hit Man X

Yes, yes, yes, yes.

The LQ4/9 heads will dump compression way south of 9:1 on a 5.3, the cam is a decent cheap upgrade as it pulls to 6000 vs the stocker flattening out. The tune is for the LQ4/9, it won't be as good as a correct tune for your 5.3




'01+ LQ4 and 9s have the same heads, cam, internals minus the pistons. Both are quite potent in stock form. I don't see the ~½ point in compression making a huge difference in power in all honesty. The tuning really shuts them down stock.

The big difference in the LQ4 or 9 over the 4.8 (3.78x3.27) is both the bore and stroke, over the 5.3 (3.78x3.62) it's the bore. Stepping to a 4" bore from a 3.78" makes a BIG difference is the production of power throughout the power band.

Snake Eater

If you just want 350hp get a cam like TR220 and springs. If you do the install yourself it will cost you about $600. Then get a good catback and a Nelson tune for about $600. That will give you maybe 305 at the wheels. And its a whole lot cheaper than all the other stuff your trying to do.

A 5.3 with the right stuff can be a killer motor. More than good enough for mid 13s N/A.

04BlackSilverado

iTrader: (6)

Where can I get a TR220 cam and springs you speak of?
Should I get a different ratio rockers too?
what brand you say would be a good catback for power(but not too loud)?

Snake Eater

on the right, a sponcer called Thunder Racing. They have good cams. Comp Cams have the Comp 918 springs. And the stock rockers are fine.

You can either buy a Magnaflow 3" in/out and dump it, or spend more on a lesser flowing Gibson catback for $289.

Hey, just looked and saw your New Hamp. Are you far from the Maine border?

Ling_650vette

iTrader: (1)

Personally dont like Gibson. The magnaflow kit is really nice tho, i still prefer Dynomax or Flowmaster but they tend to be a more aggressive sounding system.

04BlackSilverado

iTrader: (6)

I work in Kittery at PNSY as an electrician so Maine is a daily commute for me, about 15 mi.

Onyx 02

iTrader: (7)

Thanks parish and the rest of you for the help!!!

Ling_650vette

iTrader: (1)

Dont stay on your knees to long in front of parish. He's goin 10s now, so he may not see you

Black04SS

Tiburon,Did I read your post on LQ9 cam specs right? Is the intake lode larger than the exhaust lobe?

WP