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#285
by
SMOKEYDUB
on 29 May, 2006 15:49
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malone have you done anything to your project lately any recent upgrades or dynos?
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#286
by
malone
on 29 May, 2006 16:22
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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.
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#287
by
SMOKEYDUB
on 29 May, 2006 17:32
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o well.... good stuff congrats and all that good stuff good luck!
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#288
by
X@V
on 09 Jul, 2006 10:28
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#289
by
X@V
on 11 Jul, 2006 20:07
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Still waiting...
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#290
by
DVST8R
on 12 Jul, 2006 13:10
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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:
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#291
by
Benjamin
on 13 Jul, 2006 04:02
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i even dont understand wich benefit it give...
Greetz, Benjamin
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#292
by
X@V
on 13 Jul, 2006 13:33
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Better flow under the head.
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#293
by
935racer
on 13 Jul, 2006 16:26
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[/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.
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#294
by
greggearhead
on 14 Jul, 2006 08:12
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Was that tested on the flow bench at all or a single change done dyno/g-tech tested? Not doubting it, just curious.
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#295
by
935racer
on 19 Jul, 2006 16:29
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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.
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#296
by
greggearhead
on 20 Jul, 2006 15:21
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I imagine any more than you are talking about would be disastrous to the compression ratio.
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#297
by
935racer
on 20 Jul, 2006 16:54
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Exactly.
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#298
by
zooky
on 20 Jul, 2006 18:50
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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....
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#299
by
X@V
on 02 Aug, 2006 14:25
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935racer: look at this:
What do you think about it?
