I just got the results back on my LT4 ported heads. Here are the numbers I got:
Starting at .2 to .6

In.

135
200
245
271
286

Ex

96
134
158
185
196


2.02/1.56 valves


These will be going on the top of my fully forged Callies component 383 stroker.

Thanks

 

good.

 

Do you think there is more left in them? I was kinda under the impression that they should do 300 intake and at least 230 exhaust. Oh well. I guess still better than stock

 

I have never seen credible flow numbers >300CFM from stock castings, unless you include extensive welding as part of "porting". If those numbers are accurate you have a great flowing set of heads.

Rich

 

Hey Rich, you probably know the guy who ported my heads, Jordon Musser. He has been great to deal with. He was able to get these heads ported even while doing some professional racing and going to class this semester.

Oh and I was being sarcastic in the last post. I mean you know EVERYONE who gets their LT4 heads done do more than 300 intake.

 

Nice set of heads!! My LT4's flow the same give or take a few.

I was told to have the intake ported as well; in the upper r's it is a bit restrictive. I have no proof of this I'm just going off what I was told. Might want to take that into consideration though, or get more opions.

 

Been there done that. Jordon went and portmatched the entire setup along with porting the runners. He also opened up the Throttle Body inlet (two circles) to 58mm, and told me that when I wanted to go MOnoblade that he could fully open it up.

I can't wait to get these on a 383

 

Those are flow numbers at lift hts and they are probably typical of a nicely ported Lt4.

 

Nice numbers. Have you got your cam selected yet?

 

Not yet. I am picking up my heads/intake tomorrow from Jordon. He is a Cam Motions distributer, so he is going to get me a fully custom, big and nasty camshaft. I am really looking forward to ordering the Callies Dragonslayer crank, Oliver rods and JE pistons next week. Should be a nice January project

 

Yeah, that is about what I was thinking.
I know Jordon pretty well now with dealing with him, and i know he wouldn't send me "padded" numbers to wow me. What he tells me they flow, I know that is what they truely do.