[Katech_Jason]

We are now offering CNC porting of LT4 heads as a service if you send in yours. We've also come up with an extremely competitive price on this. Just send in your bare, clean heads and we'll CNC port them for only $499. If you would like us to disassemble, wash and assemble to either stock spec or Katech package specs, just add those items to your cart. Turnaround time is expected to be just a few days but could vary based on shop load.

To order, use the link below:

http://store.katechengines.com/cnc-p...eads-p578.aspx

[JBones81]

Cool. What are the approx gains on this, for an NA application with presumable intake/exhaust mods?

[BradfordCamaro]

Porting the chambers an option?

[Jamesg89]

What kind of power are you seeing with your packages with your cam?

[JBones81]

Originally Posted by Katech_Jason

600hp at the crank.

600hp na is still legit, in my book

[F1FTY]

Originally Posted by Katech_Jason

600hp at the crank.

Damn that's impressive!

What percentage are you using for drivetrain loss on the Gen 6 so we can figure RWHP with your setup?

[DiGiam]

Although its probably less. Id figure 15-18% on the auto 12-15% on the manual

[SSTony]

600 NA is sick. you wont get much better than that

[Franko07]

there are several cam options.... which cam would be the cam mentioned?
and what supporting mods were required other than cam, heads and tune

[Jamesg89]

What are the flow numbers on the porting?

[Jamesg89]

Originally Posted by Katech_Jason

Flow can be found on the product page here:http://store.katechengines.com/cnc-p...eads-p578.aspx
And in the video above.

Guess I should have looked harder, are there any numbers available below .700", from say .300"-.600"?

[Jamesg89]

Similar to this

....................PRAY Int......GM Int..../...................PRAY Exh......GM Exh
Dep....Lift..................................../.Dep....Lift...................................
12"....300"...........214..........204.../.15"....300"............180...........165
8"......400"...........273..........264.../.12"....400"............228...........225
7"......500"...........320..........306.../.10"....500"............251...........249
5"......600"...........350..........328.../.10"....600"............258...........258

[6spdhyperblue]

Would these be a good match with the stock cam? Also can I have them milled and still run on 93 with the stock cam to improve hp on e85? I am considering just changing the heads for now and get some ls7 lifters in there. Then a cam once I get bored

I guess it would make sense asking for port volume

Trying to get an idea if these would be better paired with a big or small cam

[PRAY]

Originally Posted by Jamesg89

Similar to this

....................PRAY Int......GM Int..../...................PRAY Exh......GM Exh
Dep....Lift..................................../.Dep....Lift...................................
12"....300"...........214..........204.../.15"....300"............180...........165
8"......400"...........273..........264.../.12"....400"............228...........225
7"......500"...........320..........306.../.10"....500"............251...........249
5"......600"...........350..........328.../.10"....600"............258...........258

Hey Brother, would you mind editing your post and removing my name from above the flow numbers. I understand that you were just posting the data as an example of lay out and I appreciate you using my model as a good example. The reason is two fold.

1. I am sure Jason doesn't want another vendors name/product displayed in his thread.

2. Without the content of the thread to go with those numbers, they in themselves are very misleading and don't represent my product as they were intended to. This test was not at the industry 28" standard and this test was done against the GM CNC head, not a stock head.

Thanks for your understanding in this matter.

Brett