Best-flowing 16V CR TDI head castings available in NA

Just want to open up this discussion to anyone who've actually taken the time and effort to compare the castings of the 4-cylinder CR heads. I am most interested in engine codes available in North America, but substantive and/or quantitative comparisons -- not, "My gut feeling tells me..." -- to home market European engines and other TDIs (eg. flow bench numbers comparing 8V IDI, VE TDI, PD TDI, 16V BKD, etc.) are welcome to advance the knowledge base.

The passat ones are better than golf jetta. But that much is obvious.

BKD /AZV are 16v PD not CR just saying.

mrchill said:

The passat ones are better than golf jetta. But that much is obvious.

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Helps they did away with the intake manifold runner flaps, too!

mrchill said:

The passat ones are better than golf jetta. But that much is obvious.

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I'm still learning CR-speak... What are the engine codes for a Passat application?

Steve

I believe CKRA is one of the Passat engine codes.

VW increments engine codes alphabetically. There must be a CRAP somewhere. The last code I'm aware of is CUNA (184 HP CR TDI), which reminds me of something else......

TDIMeister said:

VW increments engine codes alphabetically. There must be a CRAP somewhere. The last code I'm aware of is CUNA (184 HP CR TDI), which reminds me of something else......

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I had been thinking for a while how different the CRUA head in the CR150 could be compared to the CUAA as they are both in the EA288 family. I'm no expert on part numbers, but I had looked up some components (cylinder heads being one) for both the CRUA and CUAA to compare and they shared the same last six digits on several items. The first three digits were different, but from what I read those digits refer to platform and/or country of origin?

Did the CKRA have the rotated valve star found in the CRUA? I wonder how that effects flow or if it was solely intended for emissions.

Sent from my Nexus 6P using Tapatalk

Thought this may help for the purpose of info gathering:

CJAA bare cylinder head part number:

03L-103-351-J

Which is also the same for CBAA, CBAB, CBBA, and CBBB engines (so lots of DOHC CR 2.0L applications, Tiguan, Eos, all kinds of stuff).

CKRA bare cylinder head part number:

03L-103-351-M

This appears nowhere else in ETKA, it is CKRA-only.

Then there are some other engines that use:

03L-103-351-F

And these are engine codes CLCA, CFFA, CFFB, and CFGB

Out (in HP) of these [non-US] engines:

CBAA 136
CBAB 140
CBBA 163
CBBB 140
CLCA 110
CFFA 136
CFFB 140
CFGB 170

The CUAA is unique in many ways. The cylinder head is only one. IN terms of stateside engines, the CKRA is the better early engine. If we could get the CUAA...then that would be the best for the EA288 series.

How do you intend to bolt it on the old versions engine block?
CUNA cyl head cant be fitted on the previous engine block from what i see.

What can be done is remove all that material on the pre 2015 heads and make it similar to this intake to have a better flow on intake side. Exhaust ports are also larger.