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08-04-2006, 06:18 PM
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#1
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Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
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got my new heads
ok heres the deal i got my new heads and they were supposed to be gen3's with D port ex ports and a slightly larger valve.but they turned out to be gen 2 heads with a round ex port and a .040 smaller intake valve.
was a lil pissed till i looked up the flow numbers.the gen 3 heads avg around 20 cfm more then the gen 2's on the intake,but they lose 6-10 cfm on the ex side.
so now i have no idea which heads i want to run
heres some flow sheets(granted these wont mean **** once there ported but this gives u an idea of what they flow stock)
stock iron heads
gen2 aluminum heads
and gen 3 aluminum
now should i go for max flow with the gen 3's or use the better flowing at low lift gen 2's
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#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
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08-04-2006, 06:32 PM
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#2
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Banned Camp Director Emeritus
Join Date: Aug 2004
Location: Somerset County
Posts: 8,395
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better flowing at low lift. you're gonna be forcing air in anyway, so it really wont matter too much on the top end.
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Quote:
Originally Posted by baddest434
and 1 more smart ass answer by you and i'm going to reach into this monitor and grab you by the throat
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08-04-2006, 06:40 PM
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#3
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Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
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thats what i figured but all the ppl over at ftv6 and thirdgen are saying its a waste to use the gen2's and id be wasting my time.wanted to see if somone could give a valid reason.other then they flow better at higher lift
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
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08-07-2006, 10:33 AM
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#4
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Most of the W-body guys prefer Gen 3's for boost. turbo 3.1s with 3x00 top end swaps are getting pretty popular.
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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08-07-2006, 09:43 PM
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#5
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Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
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well the gains on the intake on the gen 3's are hurt by the cfm loss on the ex side.so im sticking with my gen 2's i can get my intake side to flow the same with a simple valve swap to the same size valve as the gen3.and my ex side already outflows the gen 3.there out to be ported and remachined for .650 lift
/and ls1 valve springs/and sbc studs installed so i can use my full roller 1.6 rockers on them.
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#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
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