TDI HEAD PORTING

[tunedbandit]

Hi guys as it says
can porting a diesel cylinder help in general performance
anyone have any info on this if they have done it 
cheers Rick

[R.O.R-2.0]

Hi guys as it says
can porting a diesel cylinder help in general performance
anyone have any info on this if they have done it 
cheers Rick

there IS a RIGHT AND WRONG way to port a TDI head, so please wait till someone has a definitive answer!

im not the one with the answer tho

[carrizog60]

tdi or not an engine will always benefit from a well ported head

[R.O.R-2.0]

tdi or not an engine will always benefit from a well ported head

the TDI has swirl inducing runners tho, and there is a bump cast into the runner that NEEDS NOT BE REMOVED..

it will smoke like a train when its cold if you port the head, and dont know what your doing..

[carrizog60]

dont know abot that,but its like i said,a WELL ported head.

out here most of the +300hp tdi“s have ported heads,thats for sure.

[tunedbandit]

thanks for all your advice guys,,,iam not planning on doing the porting myself it will go to a cylinder head specialist
i was just wondering if any you guys have ported heads 

[theman53]

I don't have a TDI with a ported head, but my TD was and will be again soon. Big difference.

[R.O.R-2.0]

thanks for all your advice guys,,,iam not planning on doing the porting myself it will go to a cylinder head specialist
i was just wondering if any you guys have ported heads 

take it to a guy that has DONE TDI HEADS BEFORE..

these are nothing like gasser heads, if you go too big on the port shape, and shave the swirl inducing bump out of the port, then it will be a cold blooded pig. it will smoke and run rough if the head is ported by someone who has no idea what they are doing, ive seen this exact thing happen before.. somebody RUINED a perfectly good TDI head because they didnt know what they were doing..

(and heads are NOT cheap)

[Smokey Eddy]

My aaz head had a "swirl bump" I attributed to Chinese casting. Removed it and the thing ran awesome. Heavily modified though...

[rallydiesel]

Yeah, that would just be a casting flaw as you said. TDI's have a very obvious intake port shape that is crucial to proper combustion. IDI's are almost like gassers as far as porting goes.

[RabbitJockey]

I remember a while back Dave at pp was experimenting with tdi head porting he said if you took too much of the swirl part out they'd smoke white down low but run better up top I guess there is enough turbulence at higher rpms for combustion to happen correctly.  It's probably easy to figure out just by checking out what cummins guys do

[snakemaster]

what power were you thinking of , i think a std head good for round 220hp but some may no beter

[gldgti]

I did this myself on this 1Y (same as AAZ) head:



goes to



and







not much, just took the ridge off the inside of the port near the valve and opened up the manifold connections to the same size as the manifolds.

Made a noticable difference to driveability.

[Smokey Eddy]

I did very similar to my AAZ head. I went all the way to the valve stems and then removed any part of the stem that stuck out. Matched the ports to the gasket and then on the other size i opened the ports up all the way to the valve seats.
Resulted in incredible mileage and super torque under 0 boost. Flowed amazing. Looking forward to selling my head to someone who will use it well.

I was so happy with the results i will definitely be looking into doing some head work on the ALH I just got.

[gldgti]

I did very similar to my AAZ head. I went all the way to the valve stems and then removed any part of the stem that stuck out. Matched the ports to the gasket and then on the other size i opened the ports up all the way to the valve seats.
Resulted in incredible mileage and super torque under 0 boost. Flowed amazing. Looking forward to selling my head to someone who will use it well.

I was so happy with the results i will definitely be looking into doing some head work on the ALH I just got.

Yup, I don't like to overstate it but it does make a huge difference to torque off boost.