Chevy performance cnc ported ls3 heads - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

zz430camaro · 11-29-2017, 05:45 PM

Heads were worth 28 hp in this article on 700 HP engine.

http://www.hotrod.com/articles/hrdp-...er-heads-test/

WHAMMO · 11-29-2017, 11:41 PM

Quote:

Originally Posted by zz430camaro

Heads were worth 20 hp in this article on 700 HP engine.

http://www.hotrod.com/articles/hrdp-...er-heads-test/

28hp for GMPP and 35hp for the SDPC version.

And when you see that big bore Mast heads gain 69hp, its a miss match with stock style LS3 heads for this 468ci engine.

Bo White · 11-30-2017, 06:12 AM

Yes so imagine having almost 100ci less displacement and around 1.5 less compression on what you would gain from these heads. Wouldnt surprise me if it was almost half.

NikolaiD · 11-30-2017, 04:44 PM

Here's a good test on a stock crate motor:

http://www.powerperformancenews.com/...flow-vs-power/

They gained 10HP on the stock motor. It's consistent with what I saw in that it's the same gain throughout the whole rev range.

I had to add exactly 10% fuel to get my AFR back though and the difference was noticeable right away (anything under 10hp difference can't be felt at all in my opinion), I wish I had dyno data. I'll get it on the dyno soon to at least see what it's at after the swap.

NikolaiD · 12-19-2017, 11:16 PM

Quote:

Originally Posted by NikolaiD

I wish I had dyno data. I'll get it on the dyno soon to at least see what it's at after the swap.

Well, here's that useless dyno data... It's a number, but I don't have a base line...

11-29-2017, 05:45 PM	#43
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,498	Heads were worth 28 hp in this article on 700 HP engine. http://www.hotrod.com/articles/hrdp-...er-heads-test/ Last edited by zz430camaro; 11-30-2017 at 03:10 AM.

11-30-2017, 06:12 AM	#45
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,095	Yes so imagine having almost 100ci less displacement and around 1.5 less compression on what you would gain from these heads. Wouldnt surprise me if it was almost half. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter, stage 4 cam and Wilkes 11° 65cc heads Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

11-30-2017, 04:44 PM	#46
NikolaiD Drives: 2002 M3, LS3, TR6060 Join Date: Mar 2016 Location: Chicago, IL Posts: 31	Here's a good test on a stock crate motor: http://www.powerperformancenews.com/...flow-vs-power/ They gained 10HP on the stock motor. It's consistent with what I saw in that it's the same gain throughout the whole rev range. I had to add exactly 10% fuel to get my AFR back though and the difference was noticeable right away (anything under 10hp difference can't be felt at all in my opinion), I wish I had dyno data. I'll get it on the dyno soon to at least see what it's at after the swap.