View Poll Results: Which head for big spray
Multiple Choice Poll. Voters: 30. You may not vote on this poll
Head Choice for Spraying Bigger Hits
8 second mod
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From: East Side Performance! mASShole
sure, i will sell the one good head and all the valves are still good so those too.
not sure about atv?
as for me, right now im leaning towards the etp ls7 style 6 bolt heads
not sure about atv?
as for me, right now im leaning towards the etp ls7 style 6 bolt heads
difference will be minimal.... yet the L92 can be ported on the exhaust to flow with the AFR....... and for much less money.
If you go 4 bolt (which you must with the L92) just make sure you have ARP heads studs and it should hold the 300.... unless you want to spray at 2500-3kk vs 3500+rpm.
That is my take... I think the intake design/cubes/stroke has a greater impact on lifting the heads than the deck thickness.
Just dont mushroom a valve.... get some REV Valves as cheap insurance on the L92.... and be done with it!
If you go 4 bolt (which you must with the L92) just make sure you have ARP heads studs and it should hold the 300.... unless you want to spray at 2500-3kk vs 3500+rpm.
That is my take... I think the intake design/cubes/stroke has a greater impact on lifting the heads than the deck thickness.
Just dont mushroom a valve.... get some REV Valves as cheap insurance on the L92.... and be done with it!
Thread Starter
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From: Tacoma, WA
difference will be minimal.... yet the L92 can be ported on the exhaust to flow with the AFR....... and for much less money.
If you go 4 bolt (which you must with the L92) just make sure you have ARP heads studs and it should hold the 300.... unless you want to spray at 2500-3kk vs 3500+rpm.
That is my take... I think the intake design/cubes/stroke has a greater impact on lifting the heads than the deck thickness.
Just dont mushroom a valve.... get some REV Valves as cheap insurance on the L92.... and be done with it!
If you go 4 bolt (which you must with the L92) just make sure you have ARP heads studs and it should hold the 300.... unless you want to spray at 2500-3kk vs 3500+rpm.
That is my take... I think the intake design/cubes/stroke has a greater impact on lifting the heads than the deck thickness.
Just dont mushroom a valve.... get some REV Valves as cheap insurance on the L92.... and be done with it!
Robert
Thread Starter
TECH Senior Member
iTrader: (2)
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From: Tacoma, WA
here's the numbers from member Mikey97ZM6 port job.
Stock L92 Heads
Lift.....intake.....exhaust
.200...160.........122
.300...214.........173
.400...268.........200
.500...302.........216
.550...315.........222
.600...319.........226
.650...321.........229
Ported L92 Heads
Lift.....intake.....exhaust
.200...164.........130
.300...228.........179
.400...280.........223
.500...317.........252
.550...335.........260
.600...350.........266
.650...357.........270
.700...357.........274
Robert
Stock L92 Heads
Lift.....intake.....exhaust
.200...160.........122
.300...214.........173
.400...268.........200
.500...302.........216
.550...315.........222
.600...319.........226
.650...321.........229
Ported L92 Heads
Lift.....intake.....exhaust
.200...164.........130
.300...228.........179
.400...280.........223
.500...317.........252
.550...335.........260
.600...350.........266
.650...357.........270
.700...357.........274
Robert
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heres what my livernois stg 3 L92s flow
.100: 79/60
.200: 160/117
.300: 228/195
.400: 288/214
.500: 323/221
.600: 354/232
.700: 363/238 (278 with 1 3/4" pipe)
they are milled, and i am going to hit the motor with probably a 300 shot, i have L19 head studs on right now, i dont want to spray any more than 300 cause i dont know if the heads will lift or not, hell they might lift with the 300 shot.
240/252 .650/.661 114+3 comp cam on LSK lobes.
.100: 79/60
.200: 160/117
.300: 228/195
.400: 288/214
.500: 323/221
.600: 354/232
.700: 363/238 (278 with 1 3/4" pipe)
they are milled, and i am going to hit the motor with probably a 300 shot, i have L19 head studs on right now, i dont want to spray any more than 300 cause i dont know if the heads will lift or not, hell they might lift with the 300 shot.
240/252 .650/.661 114+3 comp cam on LSK lobes.
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From: Tacoma, WA
heres what my livernois stg 3 L92s flow
.100: 79/60
.200: 160/117
.300: 228/195
.400: 288/214
.500: 323/221
.600: 354/232
.700: 363/238 (278 with 1 3/4" pipe)
they are milled, and i am going to hit the motor with probably a 300 shot, i have L19 head studs on right now, i dont want to spray any more than 300 cause i dont know if the heads will lift or not, hell they might lift with the 300 shot.
240/252 .650/.661 114+3 comp cam on LSK lobes.
.100: 79/60
.200: 160/117
.300: 228/195
.400: 288/214
.500: 323/221
.600: 354/232
.700: 363/238 (278 with 1 3/4" pipe)
they are milled, and i am going to hit the motor with probably a 300 shot, i have L19 head studs on right now, i dont want to spray any more than 300 cause i dont know if the heads will lift or not, hell they might lift with the 300 shot.
240/252 .650/.661 114+3 comp cam on LSK lobes.
Robert
I have ET 245`s on my 408 and love them. Greg Good did alittle work to them and here are the flow numbers!
These are the numbers from my bench(Greg Good). 28", 4.030" bore, and no pipe on the exhaust port.
Intake Exhaust
.200" 148 117
.300" 228 160
.400" 301 196
.500" 339 247
.600" 354 263
.650" 354 269
.700" 355 272
I spray a 200 shot and she flat hauls ***!
These are the numbers from my bench(Greg Good). 28", 4.030" bore, and no pipe on the exhaust port.
Intake Exhaust
.200" 148 117
.300" 228 160
.400" 301 196
.500" 339 247
.600" 354 263
.650" 354 269
.700" 355 272
I spray a 200 shot and she flat hauls ***!
....Why would they, if accompanied with nice studs/gaskets be any more likely to lift if ported?-Will
After porting:
238@ .300 intake
297@ .400 intake
360@ .600 intake
369@ .650 intake
257@ .600 exhaust (no pipe)
Ran 6.48@ 108 on a 200 shot full weight. No traction problems... converter sucks *** IMO.
Thread Starter
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From: Tacoma, WA
Thanks for the explanation...I was looking at it from a financial stand point and was left wondering "WTF?" lol....for the price of AFR's you could have some nicely ported L92's....Why would they, if accompanied with nice studs/gaskets be any more likely to lift if ported?
-Will
....Why would they, if accompanied with nice studs/gaskets be any more likely to lift if ported?-Will
Robert
converter problems? just buck up and put a stick behind that beast
thank man, it should be decently quick, i wont be up there with the big guys, cause my car is still a fully loaded street car with a 6 speed. but it will be a hell of a lot of fun.
8 second mod
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Joined: Nov 2002
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From: East Side Performance! mASShole
i burnt one pistion last year, never even melted a plug this year and my 346 was still in 1 piece when i took it out and sold it. what motors did i melt down?
and no i dont think the welding i did to the deck did anything. i had it tested, and i have also spoken to alot of racers who have done the same things with no issues on much more motor then me. but again, i realy dont care, its over and done with.