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

 

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!

 

Why not ported L92's?

-Will

 

tarzan- some say that they lift alot easier than other heads, but i, myself have not seen any proof of that or know anyone that has had that problem.

 

mine didnt lift on a 300 out the hole with 26 degrees of timing and 109 in the standalone

 

yea, i was thinking about a port job on the l92s, as a buddy has got some great numbers with his ported heads. i do have the best ARP L19 heads studs (40% more clamping than standard Arp studs). I'll post up the ported flow numbers of the l92's.
Robert

 

what kind of numbers do your heads flow? what kind of times are you running, any traction probs with the bit hit out of the hole?

 

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

 

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.

 

Pretty close numbers to my buddy's heads. Man your car is going to be a beast, nice combo. I hope to upgrade to pretty close to what your doing.

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 ***!

 

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

 

Stock it flowed 317/218 @ .600

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.

 

I don't remember where the thread was, maybe engine section, but some of the top builders say that they can lift and are not sure why yet. They also stated that deck thickness is the same as other lsx heads so that's not why. Maybe there really isn't a problem, and the jury is still out for most.
Robert

 

anytime you have an exhaust port that out flows a stock intake port its going to be good for the juice, those are some serious numbers. what was the bore they where tested on?
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.

 

Come on man with the welding on the heads and the motors you melted you don't think it had anything ot do with it?

 

No he had problems with his first set of ET's his AFR's worked great but he went to a bigger boar and already had the ET's so he sold his AFR's.

 

After a ton of research, i'm hoping that me selling my AFRs for ETPs will pan out to be a good move. We will soon see.

 

im not sure what your talking about?
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.