1FastBrick

iTrader: (16)

Looks good!!! Hopefully the new owner lets you know how it preforms if there not on here.

A.R. Shale Targa

iTrader: (2)

I certainly will. Just sold the engine to a buddy of mine who collects F bodies
This one is going into his Thirtieth anniversary. 1997 white with orange stripes
M6 car with houndstooth seats
He’s currently looking to get either a FAST 92 or the Dorman LS2 intake

omc8

iTrader: (7)

I like what you done with these heads. I have used Lunati cams before, but can you tell why you think their valve spring kit is a good deal ?

A.R. Shale Targa

iTrader: (2)

First the price has only gone up 25 bucks since the first Lunati kit I purchased back in 2011, still using those on my Vette engine with over 10,000 trouble free miles on them now
Secondly, they come with the locks, seals, locators and the Chrome-moly retainers while a bit heavier than the titanium stuff, dont get chewed up on the underside from spring surge or bounce.
Lastly, I've never heard of a spring failure from anyone using these kits.....perhaps it's happened but I've not seen a thread or anything...

ddnspider

iTrader: (26)

So what was the verdict on the $500 CNC by Katech? I've got a set of 243's off the car and Katech claims, "New Katech CNC ported LS2/LS6 cylinder heads flow 314cfm on the intake and 251cfm on the exhaust compared to the stock 254cfm intake and 212cfm exhaust at .650 lift."

Was it worth the money to send them out? I think you did 241's right? Is it worth the extra money to have them ran on my 243's? I'm dealing with assembly and springs separately so no need for money comparisons to other companies, just purely porting.

A.R. Shale Targa

iTrader: (2)

These were the 853 castings
272/221 w/pipe @ .600" on the G.M. valve-job after I blended the bowls

ddnspider

iTrader: (26)

I dont recall right off what stock is, but I assume you're happy? My 243's should flow quite a bit more when ported I assume too.

wannafbody

iTrader: (2)

I think stock is around 220-225 cfm for 853

ddnspider

iTrader: (26)

So like 50 cfms for 500 bucks lol? Sounds good to me.

A.R. Shale Targa

iTrader: (2)

Engine has yet to run but I will update with results
In all honesty my self imposed budget of one thousand dollars meant that a fancy valve job and at least 10-12 CFM was left on the table. But to be honest I barely made squat on the sale of this engine. It went to a great guy in an awesome car and he will get it to run strong

gnx7

iTrader: (28)

Curious what it makes for power..... Scotch Brite pads kick *** for cleaning piston tops and the block deck. I use them as well with Simple Green/brake cleaner.

ddnspider

iTrader: (26)

I'm in the same boat. Not looking to throw money away for minimal gains but for 500 bucks if I can gain 20hp seems like a good idea.

A.R. Shale Targa

iTrader: (2)

It was advertised as a fall special/perhaps Jason would still honor that deal
It's really quite debatable if the forty or so CFM was worth it since I still needed to have them milled locally and had about six hours in bowl finishing. Also the "no fancy valve-job" is still a sour taste for most flow number lovers
The CNC work was nice and Jason stated that it was an older program so eventually we shall see.....M6 trans but if it only puts 400 down then that would be considered weak; 435 would be labeled "strong" for what it is...certainly no special recipe by any means

ddnspider

iTrader: (26)

I was searching and found alot about the valve job being needed to really shine and the intake will also limit flow..so if the heads already flow 260 or so stock....maybe the best bet is to lap the valves and call it good and save the 500 bucks for other parts of the build. Not a max max effort at all considering I'm doing a Titan 2 cam lol.

1FastBrick

iTrader: (16)

I was quoted $600 from a few other vendors for just CNC work only. No additional labor or parts. So the original $500 sale was a good deal.

I was trying to see if I could save money over a complete package. The answer to that ended up being no.

ddnspider

iTrader: (26)

Ive already got the valve train so it really is just porting the heads. Katech still has it for 499 on their site. Supposedly Livernois also had a 500 port just but couldn't find any info. Everyone else is like 1000 and up. I don't want to sacrifice low end either if they just hog them out.

1FastBrick

iTrader: (16)

They are not "hogged out" They stratgicly removeing material in key areas that promote flow. You can gain 40cfm in just the bowl area when done properly.

ddnspider

iTrader: (26)

It's an old program and there's very little info about them. Are you saying in you're opinion it's a good bang for the buck deal?

A.R. Shale Targa

iTrader: (2)

A tighter valve margin would have helped and CNC chamber work- unshrouding also improves flow.
Only some of the most talented porters have approached 300 CFM with non 243/799 castings
At some point these do reach their design limits.
What kinda surprised me was that they continued to pick up at both .650 and .700 lift points. Even the 243/799s go turbulent at .550 and above lift in production form

A.R. Shale Targa

iTrader: (2)

Hence the very reason for this thread. Difficult for me to imagine that anything Katech has ever done would be “mediocre” or “meh”. Lol