mattcossel29

iTrader: (2)

I pulled these heads off of the motor that came out of my car.. I am wondering if I should just sell them off disassemble them, have them cleaned and have the portwork cleaned up some and reassemble them with my 918s and my stainless valves..

Let me know what you think.. I can get more pictures of other ports as well..

djjab57

iTrader: (17)

any markings on the heads, stamps ect

cause4panic

iTrader: (2)

needs more bowl work

gixxer75094lt1

iTrader: (8)

how did the car run with those heads? power wise i mean.

Ed Wright

iTrader: (1)

You can't tell much from the photos, except maybe intake guide boss was left a tad fat. Maybe they got more polishing than porting?

355z28

iTrader: (8)

The car was bought with a bad engine and in non running condition. This is what we found when it was dissassembed.

wht97ws6ta

Looks like they just got a fluff and buff done to them. It doesnt really look like they had much material removed around the guide. The chambers look ok, mostly just polished. The more critical areas of the port are not revealed in the photos, so its hard to tell if they are of quality port work. From what i can see they arent gonna be a huge improvement over as cast.

Gojira94

iTrader: (4)

These are 10128374. This is one of the 2 stock castings that is sought after for P/P work. 10207643 is the other one. These are the same as mine. They flow really well and can help make close to 400RWHP with the right P/P & valve choice + cam in the 230 nieghborhood. I got 1.94 & 1.56 Manley stainless in mine with a 5-angle job. You don't need big valves to make HP, so if you keep 'em don't go too big...

Potentially very nice heads. Good find.

mattcossel29

iTrader: (2)

Thanks for the info! Ill try to get more pictures with a better camera.

blackz93

iTrader: (2)

Doesn't look like much material was removed.

96capricemgr

iTrader: (1)

A LOT of guys use that casting and it does have potential, BUT that was not the point of the thread.

These heads have been modified, and as others have observed possibly more fluff job than meaningful port work. Once heads have been worked most shops wont want to touch them.

Gojira94

iTrader: (4)

Good to know. I would not have expected that, have not been in a position to seek help with heads that were already worked so I've never asked. What do you think about CNC shops' approach/ willingness? Or would it be even worth it to bother?

96capricemgr

iTrader: (1)

A CNC shop definitely does not want previously worked heads. It screws up the tool cutting path and can cause the tool to chatter.

01FbTaWs6

iTrader: (12)

any good porter would atleast take a look at them. As if they havnt had much done they are likelly fixable because the good porter would be taking material out anyhow. The most important picture would be to remove the valves and show us the bowl work if any.

355z28

iTrader: (8)

Thats a poor excuse to not touch them, expecially if they have minor work done to them like these. If the tool starts to chatter because of the different depth of cut any good machinst knows to adjust speeds and feeds.

gixxer75094lt1

iTrader: (8)

looks like someone took a dremel to them, thats all. combustion chambers look pretty decent though. best thing to do is and im surprised no one has said this is to get them FLOWED and see the numbers.

FASTFATBOY

iTrader: (23)

The port match is TERRIBLE on these. I dont see how a gasket would seal well on the intake port.

gixxer75094lt1

iTrader: (8)

yea take a pic with a gasket on..i wanna see.

96capricemgr

iTrader: (1)

CNC has two key advantages accuracy/repeatability and freeing up the operator to do something else while the machine runs.

If you have to stand there and babysit because the port was already hacked up then you lose one of those advantages and should charge MORE to do it. With stock castings being so readily available the smart thing to do would be to just get a virgin set of castings. Besides, they could already have had meterial removed where a porter wants it left.

I run a wood CNC, not exactly the same as metal but still gives me a good idea of what CNC is and is not good for.

wht97ws6ta

If you look at the pics closely you can see where the gasket was sealing, and their not quiet out to the marks left by the gasket. Like i said earlier the most critical areas of the ports arent revealed by the pics you have, so its hard to judge whether the bowls have been hacked. It looks like they still have alot of bias in the beginning of the ports, so theres alot of material left in the roof. Most anybody with a good CNC program should be able to straiten them out for you if they are willing, or for that matter someone that has a clue about making heads flow and the tools to make it happen can fix them. It dont have to be done on the CNC machine. If the bowls havent been moved around a bunch then they can be fixed.