Question for those who have ported your LS3/L92 heads???
01-23-2012, 01:21 PM
#21
I know the exhaust side is definitely worth it. Even a cleanup job will help you. I think for a stock cubed engine I would just cleanup the humps and blend the runner near the seats. I guess porting the entire runners should be left for engine with more displacement.
01-23-2012, 09:39 PM
#27
My LS3 heads are out for porting right now, and I have great dyno numbers from before...but I'm also changing the cam and intake manifold when they come back...so it's just not a fair dyno test.
...I don't think you'll find many people that will do ported heads and leave the stock cam...and while you may find people who get a cam, then decide to port their heads...that's not really a fair comparison either...properly ported they'll run better with a different cam than a set of stock heads dictated.
If you want a test like that, do it...it doesn't make sense to people who are spending the money to do it in the order you want them to do it in.
01-23-2012, 10:03 PM
#28
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Your missing my point. I'm saying a porter/vender should do a legit test to show the gains. Dyno testing is out of the question for me since I live hours away from a dyno.
01-23-2012, 11:54 PM
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Has anyone every had portwork done buy a guy on a g8 forum named g8 4 speed? I think thats the screen name. Hes is very reasonably priced and supposably does very good work and knows his stuff. Patrick G said he hasnt tested his heads yet but wants to. Any input?
01-24-2012, 10:24 AM
#35
I have a 02 Fbody A4, a stock L92 motor and a dyno about 5 mins away. I can probably talk to the guys at the dyno and see if they can cut me a deal on the dyno runs. I can do the back-to-back testing but the problem is time and money to tune. I have a HPTuners Pro tuner but I've not had time to play with it so I'm not good at tuning right now. Currently my car is undergoing body work. I'm trying to get it ready to primer and paint. If within a few months and if no one has done it, I would like to do this testing. Seeing how I have nothing to gain but knowledge it should put this whole thing to rest. This is what I'm thinking of doing...
TEST #1
I would like to swap in my stock L92 w/ LS3 intake & a cam, drop in a good street tune and get a base line on it. (absolutely nothing done to the heads except a spring package)
TEST #2
Swap out the heads for a set of ported LS3/L92s, drop in a good tune and head back to the dyno.
The only problem is, I don't have the kind of cash to just go and buy a set of ported LS3/L92s. I can port them like I did my previous LS3s but that would take me a week or so. So if anyone who is local is willing to donate heads, it would help out the process. I can also talk to the guys next door to the dyno shop and see if they'll be willing to donate a set of LS3s for this test but I doubt they'll do so.
Any input???
TEST #1
I would like to swap in my stock L92 w/ LS3 intake & a cam, drop in a good street tune and get a base line on it. (absolutely nothing done to the heads except a spring package)
TEST #2
Swap out the heads for a set of ported LS3/L92s, drop in a good tune and head back to the dyno.
The only problem is, I don't have the kind of cash to just go and buy a set of ported LS3/L92s. I can port them like I did my previous LS3s but that would take me a week or so. So if anyone who is local is willing to donate heads, it would help out the process. I can also talk to the guys next door to the dyno shop and see if they'll be willing to donate a set of LS3s for this test but I doubt they'll do so.
Any input???
01-24-2012, 04:53 PM
#37
Ya, to bad we're all scrattered all over the country.
I'll post up a thread as I start to get closer to the test. To make the test fair I want to swap out the L92 valves for LS3 valves. I'll also be keep the combustion chambers the same size as to not raise compression.
What I would like to do is test a stock head vs head with valve job vs head milled vs ported head. This particular test will show which mod gains the most power. Too bad I don't have the money.
I really enjoy doing research like this. It puts all other theories/myths to rest.
I'll post up a thread as I start to get closer to the test. To make the test fair I want to swap out the L92 valves for LS3 valves. I'll also be keep the combustion chambers the same size as to not raise compression.
What I would like to do is test a stock head vs head with valve job vs head milled vs ported head. This particular test will show which mod gains the most power. Too bad I don't have the money.
I really enjoy doing research like this. It puts all other theories/myths to rest.
01-24-2012, 06:15 PM
#38
01-24-2012, 06:48 PM
#40
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Sounds like I'll just have the exhaust cleaned up since the heads are off. Good machine shop here quoted me ~$400 to mill, port, and grind for 2.00" valves on some 5.3's. Canceled that build as I'm exchanging those heads, 2 more sets, 5.3 short, msd 6ls and perfomer intake for this L76. Probably be $200 to mill and port exhaust on the 823's...
Jason
Jason