Head Porting

devonutopia

devonutopia

Top Post Dawg
Joined
Dec 1, 2003
Location
Devon, U.K
TDI
PD300 Skoda Fabia
Hullo. :D

Have got myself a quite tidy PD130 spare head and am contemplating getting it ported, and fitted at the same time as my (soon to be) rehoned injector units go in.

Anyone actually ported a head on a TDI?
 
L

LTR

Veteran Member
Joined
Nov 9, 2005
Location
Finland
TDI
Golf 4Motion, 2002
Yes. First one's about three years back.

Maybe you should take contact directly with 68corvette to get it right the first time.

And what comes to porting the inlet of a tdi head, don't listen to gasser porting guy's what they have to say. The exhaust can be made with common style.
 
devonutopia

devonutopia

Top Post Dawg
Joined
Dec 1, 2003
Location
Devon, U.K
TDI
PD300 Skoda Fabia
Ideally I want to send the head to someone in the UK to get it done... I'm going to have a word with Allard during the coming week. The cam I have fitted is supposed to give porting characteristics, but why not do the real thing. :D

Have a spare pd130 cam if anyone needs one. :D
 
H

hatemi

Veteran Member
Joined
Aug 25, 2005
Location
Finland
TDI
Audi A6 4F 3.0TDI
I Recomend 68corvette too. My curent head has been ported by him, and the next head I'm going to test will be his work aswell.
 
H

hatemi

Veteran Member
Joined
Aug 25, 2005
Location
Finland
TDI
Audi A6 4F 3.0TDI
His nic on these forums and many others is 68corvette :) Done most of the preformance heads for TDIs in Finland amongst other things.
 
TheoSweden

TheoSweden

Veteran Member
Joined
Jun 10, 2006
Location
Uppsala, Sweden
TDI
A3Q,A4Q, Passat Biturbo TDI
hatemi said:
His nic on these forums and many others is 68corvette :) Done most of the preformance heads for TDIs in Finland amongst other things.
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What can the price for porting a PD head be? I just need to get mine ported:D
 
C

chapelhill

Veteran Member
Joined
Aug 19, 2005
Location
Scotland
TDI
03 Ibiza pd13- 2260vk Turbo etc.., Merc E280cdi
I would like to try porting the cylinder head on my 5 cyl 2.5 Volvo 850 tdi. I have to take the head off as the cam belt has failed and hopefully if there is not too much damage I will repair and port at the same time. (I have a spare head.)

Does anybody have some advice on the port sizing, and especially whats the deal with the swirl on the inlet side? Can you have too much swirl? Are ther any place where you need to be careful not to break into the water jacket? Does anyone have any pictures of port castings?

Many thanks in anticipation.
Chapelhill
 
G

GoFaster

Moderator at Large
Joined
Jun 16, 1999
Location
Brampton, Ontario, Canada
TDI
2006 Jetta TDI
If you are going to try this yourself, the best thing is to smooth out the surfaces and blend out any casting ridges or corners, without making any change to the overall shape of the intake port. The swirl-generating shape is extremely important. You CAN have too much swirl, but the mistake that a "gasser-think" person would make is to remove the swirl-generating shape; that would be a BAD bad thing to do.

Very easy to *lose* power via porting, by doing the wrong thing.

Another thing - very large "hogged-out" ports might flow better on the flow bench but won't necessarily work better in the engine. You need velocity in the intake system to produce a "ram" effect that stuffs a bit more air into the cylinder after bottom-dead-centre, if the whole system is properly designed.
 
devonutopia

devonutopia

Top Post Dawg
Joined
Dec 1, 2003
Location
Devon, U.K
TDI
PD300 Skoda Fabia
It looks like I've found a UK based porting specialist, who has done TDIs before as well. Looking forward to seeing what he can do. :)
 
R

Rub87

Top Post Dawg
Joined
Dec 10, 2006
Location
Belgium
TDI
Ibiza '99 90HP
I ported mine, only the exhaust runners and polished the intake ones..

I made the exhaust runner radius 1mm bigger, I smooted the inner bend alot, fixed the valve stems but did not cut them, I wish I took some photos of the work..
 
DanEboy

DanEboy

Veteran Member
Joined
Mar 26, 2003
Location
Commack, NY (Long Island)
TDI
Jetta GLS 2000 Auto
Hey Rub,
What were the results of your porting efforts?
Can you feel the difference? If so, all across the RPM band?
Any difference in economy?
I've done mild porting myself, on gassers, and have liked the results to cost ratio! :)
 
M

MarkoP

Veteran Member
Joined
Mar 5, 2005
Location
Finland
TDI
2.0 BKD 140hp
devonutopia said:
yeah, although I've also been recommended a place near Northampton too.
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260hp.. thats nice.
Hatemi went just a little over 100mph with his Golf IV on 1/4mile, but that must be because he is still tuning the engine =)

Have you tried what your car goes mph on 1/4mile? Seems like they are weighting pretty near the same, skoda is ~50kg lighter.
 
R

Rub87

Top Post Dawg
Joined
Dec 10, 2006
Location
Belgium
TDI
Ibiza '99 90HP
I will dyno in 2 weeks..

But I did the porting the same time as the vnt-20 install, so I can't really say what the differences are..

But now I'm stuck with a boost leak in the intercooler.. can't weld it because its between the fins, and I tried with some kind-a putty but it still leaks with results in some smoke and a bit less power..
 
skid9uk

skid9uk

Veteran Member
Joined
Oct 31, 2005
Location
Leicestershire UK
TDI
1998 110
is TSR PERFORMANCE still open? there in somerset. Not sure if they do just gassers though, could be worth giving them a ring.
 
devonutopia

devonutopia

Top Post Dawg
Joined
Dec 1, 2003
Location
Devon, U.K
TDI
PD300 Skoda Fabia
skid9uk said:
is TSR PERFORMANCE still open? there in somerset. Not sure if they do just gassers though, could be worth giving them a ring.
Click to expand...
I was there yesterday. :D They don't get involved in diesels to be honest and they don't do their own head porting. I will go direct to someone (eventually :))
 
skid9uk

skid9uk

Veteran Member
Joined
Oct 31, 2005
Location
Leicestershire UK
TDI
1998 110
oh ok worth a try i said it as i think its near you, Got back from Brixham in devon today very nice place anywhere near you?
 
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