ap2002

iTrader: (8)

will some stock heads just with p&p help on a 5.3??? if so how much gain can you expect??e/t wise...

wondering if its worth the trouble to just get a P&P on the heads???

thanks...

Yelo

YES....that is what MOST of the aftermarket P&P heads ARE, just a stock head that has been Stage II P&P'd. Expect to pay ~$750 for a good Stage II P&P and 5-angle valve job with disassembly and reassembly

mason110

Yes, I agree with yelo. Try looking on ebay, or keep a eye open in the classified section, sometimes you can get a set already done for less than you can get yours done at a machinist.

ap2002

iTrader: (8)

does anyone know about how much time you'll knock off the 1/4 with a set of heads on a 5.3??? do ya'll think I can achieve a 13.0-13.2 with a set of heads on my truck.... I ran a 13.7, and that was with the converter not tuned, and I got a set of LT's coming in anyday now... so do ya'll think that with LT's and heads will bring me down that low on my et??? plus I havent taken my tonneau cover off yet, which I believe is good for another .1-.2?? I'll be happy with a 13.0-13.2 N/A in my 5.3.... what do ya'll think...

Richard@WCCH

iTrader: (3)

I'm not sure about the change in ET, but one of our customers (BBT) made 18rwhp with some mild port work and some larger valves on his 5.3l engine. Here's the thread he posted on the results WCCH Stage 1 heads dyno results
Also, we're finishing up some final details and will have some test results soon on a CNC ported Edelbrock head geared for the 4.8l and 5.3l engines. It's going to be a VERY nice head when finished, not to mention the only aftermarket head built specifically for the smaller bore engines. It will offer a nice power increase for both NA and blown applications. I'll post more when I have the results in my hands.

Good luck,

Richard

white1

iTrader: (5)

The heads will work with the cam and headers too, making even more power. While you have them off, Id shave them .20-.30 also. I have a set, but one cc needs a little work done, and a couple of new valves. I noticed a big differenc just driving around, but unsure of actual et gain. I was guaranteed by the guy who hooked me up with them I would cut .20 off my et's though

SlvrSierra4.8

iTrader: (24)

Thanks for the info regarding the CNC'd edelbrock heads. Def keep us posted on the status and gains from these heads for all us cubically challenged LS motors.

kerryt1

iTrader: (10)

.020 - .030??????

tdrumm

iTrader: (18)

I will have results of WCCH Stage 1 5.3 heads on 5/20. I am aiming for 20-25 hp. and tq.

white1

iTrader: (5)

Yea, thats what I meant .20-.30 would be fun on pump gas