Prelim. ported L92 intake #s
06-23-2006, 06:08 PM
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Prelim. ported L92 intake #s Finally got the GM 2.16 valve in the mail today. Did not modify the gm valve, valve job, or do more than blend the throat into the bowl.
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
06-23-2006, 07:49 PM
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Originally Posted by ArcticZ28
Maybe I should get some of those.... 
Brandon
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06-23-2006, 09:22 PM
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who did you have do the porting?
I just got my heads today and was thinking of having them worked over, and it sounds like whoever you have doing yours is doing it right.
GM has a single plane intake comming out, im thinking of getting that as I dont see any other option that will keep up with the heads. The GM composite intake wont keep up I dont think.
PM if necessary.
Ed
I just got my heads today and was thinking of having them worked over, and it sounds like whoever you have doing yours is doing it right.
GM has a single plane intake comming out, im thinking of getting that as I dont see any other option that will keep up with the heads. The GM composite intake wont keep up I dont think.
PM if necessary.
Ed
06-23-2006, 11:21 PM
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Originally Posted by 69firebird
who did you have do the porting?
I just got my heads today and was thinking of having them worked over, and it sounds like whoever you have doing yours is doing it right.
GM has a single plane intake comming out, im thinking of getting that as I dont see any other option that will keep up with the heads. The GM composite intake wont keep up I dont think.
PM if necessary.
Ed
I just got my heads today and was thinking of having them worked over, and it sounds like whoever you have doing yours is doing it right.
GM has a single plane intake comming out, im thinking of getting that as I dont see any other option that will keep up with the heads. The GM composite intake wont keep up I dont think.
PM if necessary.
Ed
06-23-2006, 11:22 PM
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Brandon how much are the valves? and what bout the rockers?
Originally Posted by xfactor_pitbulls
Finally got the GM 2.16 valve in the mail today. Did not modify the gm valve, valve job, or do more than blend the throat into the bowl.
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
06-24-2006, 12:33 AM
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Originally Posted by red90cobra
Brandon how much are the valves? and what bout the rockers?
Brandon
06-24-2006, 12:34 AM
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Originally Posted by DrkPhx
Any pics?
Brandon
06-24-2006, 01:58 AM
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brandon do you expect the castings to cost more in the future? so would it be wise to going ahead and buy a set and keep them till an intake becomes available. what are the flow numbers untouched? and who has the best prices on the bare
06-24-2006, 07:53 AM
#17
Breathtaking flow numbers Brandon. They will make some serious power with the right intake. Well done. 
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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.
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2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
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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.
06-24-2006, 09:20 AM
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Originally Posted by red90cobra
brandon do you expect the castings to cost more in the future? so would it be wise to going ahead and buy a set and keep them till an intake becomes available. what are the flow numbers untouched? and who has the best prices on the bare
06-24-2006, 05:46 PM
#19
Originally Posted by xfactor_pitbulls
Finally got the GM 2.16 valve in the mail today. Did not modify the gm valve, valve job, or do more than blend the throat into the bowl.
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
.200 155
.300 226
.400 282
.500 325
.600 351
.650 358
.700 362
Exhaust valve hasnt shown up yet, and I want to test it with the GM factory angle rather than a generic 1.60. Dont care to share what work was done, and we still have a way to go before the profile is done. This thing sucked the SF600 dry at .600 and we had to rerun .500-.700 and convert from 20 and 25". This head is going to need a very strong intake and massive TB. Looking forward to seeing a bunch of cars running these in the next few months. Oh yeah, flowed on a 4.040 bore, no BS.
Brandon
so u acheived these #'s with just blending the valve bowls? 90% valve diameter?
i assume no other wall, or short turn work,or guide work,
how bout chamber work?
no bs
what do u think of this combo i have in mind?
well i alredy started building the bottom end 6.0 block decked .010-.015
4.06 bore x 4.1 eagle crank
6.125 rods
1.061 ch pistons -.010 out da hole
thinking of 245-250's/650+ lift cam with 8.7-9:1 DCR 112-113 LSA
for some n20 small 150-200 plate shot
it will be carb. so i need the single plane coming out
with an HP type 850 cfm carb
i am building this engine based on the L92's, was hoping to see 350+cfm at .600 lift with minimal porting,seems like i did right
it seems like they will pick up even more with the right valve job and back cut
dare i mention 2.18 valves
and further portingthanks for the info provided, hope i didnt say too much
Art
06-24-2006, 06:21 PM
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As I said in the orginal post, the only changes I made to the seat was blending, ie. no valve job. The port itself did see some changes, the numbers yielded above did not come from blending the valve job alone.
Brandon
Brandon