4.8L Longevity

I just thought someone might find this info helpful/interesting.

I put my turbo on a few years back when my lil' 4.8L had a mere 22K. I just rolled over 51K and here are a few facts for anyone considering boost or anyone that just wants to make some good power/torque.

-Compression check revealed 160+ across all cylinders (Even #7 yes)

-Been running up to 13psi without a single knock

-ran at the track several times (only 1/8 mile unfortunatly)

-Still has GREAT drivability

-STOCK internals....although I have upgraded the valve springs and pushrods

-Haven't been on the dyno lately but 11psi yielded 444hp/484tq

So how's everyone else doing on LS longevity? The biggest reason I ask is cuz so many people swear by Toyota/Nissan/Honda longevity but the same people don't take into account the kind of info I just posted.

GM LSx engines are mules if you put them together correctly. Ford modular engines are mules if you put them together correctly. New generation engines in general are so well desgined, they will last a long time.

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Originally Posted by truckinL33

GM LSx engines are mules if you put them together correctly. Ford modular engines are mules if you put them together correctly. New generation engines in general are so well desgined, they will last a long time.

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Originally Posted by truckinL33

Retarburated E85 L92 2002 mustang in the works!

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Modulars can't be that great....

I never said they were good for power. :LOL: How many cop cars run modulars, and get the piss beat out of them? I rest my case.

What thermostat are you running?

I'm about to roll over 230,000 miles on my 99 5.3. Stock internals with your common bolt ons. Some day I'll add a cam and all that jazz and see where that puts me.

i've got 175,000 on my 4.8 and it was raped hard from 110,000 to 140,000 by my brother (talkin dirt oval track banging rev limiter)

And let me tell all of you! He has that truck dialed in! I got to ride in it acouple wks ago and the truck is flawless!!

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Originally Posted by zeake

What thermostat are you running?

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Stock

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Originally Posted by 06 4.8

And let me tell all of you! He has that truck dialed in! I got to ride in it acouple wks ago and the truck is flawless!!

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Thanks Chad, that sprayed 4.8 moves pretty good too!

140,000 on my avalanche and still running strong with no issues, getting ready to bolt a procharger onto it with no hesitation (all my non gm driving friends and family tell me im nuts). vortec motors have proven themselves for over 20 years

120k on my 5.3 and no issues yet!

125,000 on my 5.3 and about to have 7psi thru it until i get a boost controller...

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Originally Posted by st8kfinger

140,000 on my avalanche and still running strong with no issues, getting ready to bolt a procharger onto it with no hesitation (all my non gm driving friends and family tell me im nuts). vortec motors have proven themselves for over 20 years

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Huh?

Well the vortec 6 cyl multiport was first used in 88, I think thats what he was getting at. And since then have been rated top engines.

But 96 was the first year for the roller assemblies.