HELP! Swap in a Vortec 8.1 or build my 5.3??

[Ilikemtb999]

Maybe the gmt800 section would know more?

 

[Pilot]

Maybe the gmt800 section would know more?

Shit, I didn't realize I had posted this in the wrong section! I posted this from my iPhone at 35k feet while flying from India back to Newark lol. Damn

 

[Tonyrodz]

Shit, I didn't realize I had posted this in the wrong section! I posted this from my iPhone at 35k feet while flying from India back to Newark lol. Damn

Damn, you can do that now? Lol

 

[S33k3r]

Damn, you can do that now? Lol

What? You've never cruised the forums while flying? "Go go in flight!" <-- Ok, not really...

 

[Tonyrodz]

What? You've never cruised the forums while flying? "Go go in flight!" <-- Ok, not really...

Lol

 

[inmypassatlife]

LS6

 

[blackjack]

Just rebuild the 5.3...
SOOO MUCH STUFF YOU CAN GET
Mine is a beast with a comp .525, no AFM, bigger ThrotBody, Airraid, new waterpump, oil pump, chain, no cats-duals with balance tube and shift kit in 4LE and royal purple in G80diff. ppv wheels tires 265x60x17's and 3.73's.
Less than 1700$ parts and I would value the labor at ...maybe $1,500+- (did mine in driveway, except friend did tranny)
Guess what...still gets 14 1/2 - 15 1/2 mpg and I have a (very) heavy foot.

 

[blackjack]

me agaim...of course I did good trick v

 

[blackjack]

me again, of course I did a good trick valve job ($150.) on heads and matched ports

 

[Pilot]

Just rebuild the 5.3...
SOOO MUCH STUFF YOU CAN GET
Mine is a beast with a comp .525, no AFM, bigger ThrotBody, Airraid, new waterpump, oil pump, chain, no cats-duals with balance tube and shift kit in 4LE and royal purple in G80diff. ppv wheels tires 265x60x17's and 3.73's.
Less than 1700$ parts and I would value the labor at ...maybe $1,500+- (did mine in driveway, except friend did tranny)
Guess what...still gets 14 1/2 - 15 1/2 mpg and I have a (very) heavy foot.

Awesome! Mind sharing your dyno results? I'm wondering what kind of low end torque/HP you can get out of a 5.3.