What can i expect with these heads
11-20-2005, 12:26 AM
#1
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What can i expect with these heads They are a Stage 3 ls6 head, milled .030 and flow at 314.4 CCFM with a 3.910" bore. 254 cc int runner and 62.5 chamber.
Rest of my mods are in the sig.
Thanks,
Kenny
Rest of my mods are in the sig.
Thanks,
Kenny
11-20-2005, 12:30 AM
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Originally Posted by destroyerSS
They have a 254 intake runner 
got them for a hell of a deal, so i said screw it, i'll take them even though they are overkill for a stock engine
11-20-2005, 12:35 AM
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Originally Posted by destroyerSS
Who did the porting on the heads?
Should be around 400hp
Should be around 400hp
11-20-2005, 12:44 AM
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ok i've got Mac-Mid lengths also ready to go in, plus new HS 1.7 roller rocker arms, new plus and wires also. Not sure if i want to stay with the off road pipe or get one with some cats. SLP LM exhaust at the moment also.
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11-20-2005, 12:56 AM
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Originally Posted by destroyerSS
Ok, i would say about 400-420 MAX
Intrested to see what it make with those monster intake runners. They seem to big for a mild cammed 346.
Intrested to see what it make with those monster intake runners. They seem to big for a mild cammed 346.
yea that's true but i got the heads for a really good deal so i said what the heck, plus when i do upgrade engines, won't need the heads
11-20-2005, 08:37 AM
#11
If you run those HS rockers, you better have some excellent valve springs. Lots of people getting pre-mature valve float with them. I would recommend the stock rockers myself. It's what I run.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
11-20-2005, 11:33 AM
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Originally Posted by Patrick G
If you run those HS rockers, you better have some excellent valve springs. Lots of people getting pre-mature valve float with them. I would recommend the stock rockers myself. It's what I run.
11-20-2005, 02:45 PM
#13
It was reported to me by the original customer that those heads made over 465rwhp on a stock LS6 bottom end with a G5-X3 cam. As I recall, he didn't have an electric water pump installed yet either. The car was dynoed at LAPD in Chatsworth.
You have plenty of room to grow your engine around those heads.
Happy hot rodding,
Richard
You have plenty of room to grow your engine around those heads.
Happy hot rodding,
Richard
11-20-2005, 03:40 PM
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Originally Posted by Richard@WCCH
It was reported to me by the original customer that those heads made over 465rwhp on a stock LS6 bottom end with a G5-X3 cam. As I recall, he didn't have an electric water pump installed yet either. The car was dynoed at LAPD in Chatsworth.
You have plenty of room to grow your engine around those heads.
Happy hot rodding,
Richard
You have plenty of room to grow your engine around those heads.
Happy hot rodding,
Richard
thanks for the advise Richard
11-20-2005, 03:42 PM
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Originally Posted by Patrick G
If you run those HS rockers, you better have some excellent valve springs. Lots of people getting pre-mature valve float with them. I would recommend the stock rockers myself. It's what I run.
11-20-2005, 03:52 PM
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Originally Posted by Patrick G
Probably not good enough unless you shim them to within .050" of coil bind.
11-20-2005, 04:21 PM
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Stick with the stockers. The aftermarket rockers don't increase power and have shown to be a big pain in the ***. Stockers work great. I use them on my 422ci with no issues. Are those a 2.08 1.60 valve combo? How much power you make will come down to total parts combination and the tune. If your doing macs why not just use a full long tube header. Either way it is illegal in cali.
11-20-2005, 09:34 PM
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Originally Posted by strokedls1
Stick with the stockers. The aftermarket rockers don't increase power and have shown to be a big pain in the ***. Stockers work great. I use them on my 422ci with no issues. Are those a 2.08 1.60 valve combo? How much power you make will come down to total parts combination and the tune. If your doing macs why not just use a full long tube header. Either way it is illegal in cali.
