Author Topic: G-Teched my 1.6TD - Part 2 (Read 146954 times)

SMOKEYDUB · « **Reply #285 on:** May 29, 2006, 03:49:13 pm »

malone have you done anything to your project lately any recent upgrades or dynos?

malone · « **Reply #286 on:** May 29, 2006, 04:22:04 pm »

Ha!

I won't be spending much, if anything, on the IDI (machining & parts) yet as I have Three Big Expenses for 2006:

1) An engagement ring (bought 1 week ago).

2) A new vehicle (base TDI model with DSG, Platinum Grey, should pick it up this week).

3) A new home this Fall.

For now I'm selling all of my older VWs (already sold one of them) and will be driving just the TDI for a while. Then once I'm settled the IDI will be rebuilt and I will look for a clean VW chassis to drop the IDI engine back in.

SMOKEYDUB · « **Reply #287 on:** May 29, 2006, 05:32:35 pm »

o well.... good stuff congrats and all that good stuff good luck!

X@V · « **Reply #288 on:** July 09, 2006, 10:28:17 am »

Quote from: DVST8R

Got your PM.

Here is my attempt at Paint, straight up KG style.

The Red circle is the the exhuast valve, the Blue one is the intake valve, the grey area's on either side are the area that has been relived. Of coures in real life they have uniform shape and size, as well as, they have a slightly differn't overall shape, size, ect..., but it will give you guys an idea. As Dave said earlier the relief is about .25mm-.5mm deep.

What do you think about this?

X@V · « **Reply #289 on:** July 11, 2006, 08:07:34 pm »

Still waiting...

DVST8R · « **Reply #290 on:** July 12, 2006, 01:10:25 pm »

I don't know, I didn't do the head work, you will have to get Dave (935racer) to chime in. I would say they are excessive though, and the one side is supposed to be conciderably smaller then the other side. On your drawing they look equal. What I have down is not even close to scale, it was a lame at best attempt in paint to make a graphical representation of what was going on. Malone doesn't have that car on the road currently so mabey you could convince him to pull the head and take a picture or two of the head work. :wink:

Benjamin · « **Reply #291 on:** July 13, 2006, 04:02:56 am »

i even dont understand wich benefit it give...

Greetz, Benjamin

X@V · « **Reply #292 on:** July 13, 2006, 01:33:19 pm »

Better flow under the head.

935racer · « **Reply #293 on:** July 13, 2006, 04:26:09 pm »

[/quote]

Like brett said, his computer paint photo is not very accurate, but its a hell of a lot better than I could do on the computer :? Don't relieve the head like you have pictured above. I wouldnt reccomend to anyone doing this unless you have quite a bit of porting experience and ultra steady hands and killer hand eye coordination. One thing you can do though is radius the edge of the aluminum head right before the valve seat, just dont hit the valve seat. So it will look somewhat similar to what you have painted above just don't let the bevels' edge stray more than 1-1.5mm wide. Do the intake ones first to get your practise down (preferably on a core head before you do it on your good one) than do your exhaust last, so you can do the best job on them as the bevel has most benefit on the exhaust side.

greggearhead · « **Reply #294 on:** July 14, 2006, 08:12:43 am »

Was that tested on the flow bench at all or a single change done dyno/g-tech tested? Not doubting it, just curious.

935racer · « **Reply #295 on:** July 19, 2006, 04:29:22 pm »

Yeah I'll see if I can dig up some flow charts, I havent flow tested any IDI heads for a long time now, after I did all the research I just doccumented what worked well and where and I just duplicate it now.

I would like to RE-STRESS, the mod I mentioned above with the bevel around the complete radius is small, the bevel should not exceed 1-1.5mm.

greggearhead · « **Reply #296 on:** July 20, 2006, 03:21:01 pm »

I imagine any more than you are talking about would be disastrous to the compression ratio.

935racer · « **Reply #297 on:** July 20, 2006, 04:54:25 pm »

Exactly.

zooky · « **Reply #298 on:** July 20, 2006, 06:50:42 pm »

Quote from: greggearhead

I imagine any more than you are talking about would be disastrous to the compression ratio.

why? Its on the other side of closed valves....

X@V · « **Reply #299 on:** August 02, 2006, 02:25:06 pm »

935racer: look at this:

What do you think about it?