I'm wanting to do valve upgrade on my 862 heads, 2" valves intake and have them milled n hand ported an polished. Can I just throw the valves in and go what needs to be done to accomplish this.
I'm wanting to do valve upgrade on my 862 heads, 2" valves intake and have them milled n hand ported an polished. Can I just throw the valves in and go what needs to be done to accomplish this.
about 4 yrs ago Texas speed did a test with installing 2" valves in these heads. the results showed the stock size valve netted better performance then the 2" valve. had to do with the larger valve hurt flow of the head. look on ls1tech in the gen3 section and go back 4 yrs if possible.
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
So it be best just hand p&p and get them milled?instand of the 2" valve upgrade
Originally Posted by fordkiller91
thats what i would do but then again id just get some 2.5 heads from TSP
Simple: 408 on steroids!
single digits coming soon!
don't the prc 2.5 5.3 heads come with 2.02' valves?
04 RCSB 5.3, Homemade 80mm FM, TU1, TH400
Can't afford prc heads right now.. just want little more low end torque and more commpression
yes they do, but the way they are cnced makes it all that much better, i used to run them on my lq9! theyre great heads!
Simple: 408 on steroids!
single digits coming soon!
Good to know, thanks skeet. You notice a decent gain?
04 RCSB 5.3, Homemade 80mm FM, TU1, TH400
Which do y'all think be. Better milled p&p 2" valve upgrade or just 243/799 heads and milled them .030-.045
243 with a proper P&P+milled .030 is a bad ass head for the money. JMO.
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
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