ShopDAP: 2016 GTI vs Golf R Engine Differences

[geokilla]

Pretty cool to see the differences. Best comment was how VW went and overbuilt the engine, then put in crappy cooling lol.

 

[ucfquattroguy]

My gut tells me there's more to do with NAR low-output EA888.3 (IS20) engine codes being exclusively produced in the Mexico plant for US market than the R engine codes being "beefier" with a different exhaust cam because higher power output. I'd be curious about a teardown of a ROW IS20 engine code compared to the IS38 engine codes that seem to be common for all markets.

 

[BudgetPhoenix]

Watched this yesterday. More than anything, I'm curious if the intake cam is actually the same or not.

 

[Kdubya]

Cams in the R have bigger lobes

Compression ratio in GTI is 9.6 versus 9.3 in the Rs

 

[mike-y]

Only the exhaust cam is different. The exhaust cam on the R has more duration (not lift), so technically not bigger per se, but they do keep the valves open longer than the GTI Ex cam. Intake cam lobes were the same between GTI and R.

Pauly was going to use the GTI intake cam on his build because the cost was like 20% of what an R cam costs.

 

[woodardhsd]

Got some random technical document that explained some differences between the GTI and R engines. Think most were covered by Paul or comments here.
• Cylinder head with another alloy than other engines of this group, due to the
higher thermal stress
• exhaust valves (hollow Ni content higher, nitrided)
• Rings exhaust valve seat (temperature resistance and improved wear)
• Exhaust camshaft (setting of the appropriate distribution)
• Compression ratio 9.3: 1
• piston cooling nozzles (increased speed)
• High-pressure injectors (further increased speed)

 

[scrllock]

Got some random technical document that explained some differences between the GTI and R engines. Think most were covered by Paul or comments here.
• Cylinder head with another alloy than other engines of this group, due to the
higher thermal stress
• exhaust valves (hollow Ni content higher, nitrided)
• Rings exhaust valve seat (temperature resistance and improved wear)
• Exhaust camshaft (setting of the appropriate distribution)
• Compression ratio 9.3: 1
• piston cooling nozzles (increased speed)
• High-pressure injectors (further increased speed)

All of that is accurate, he concluded that the valves were the same since it was not sodium-filled(??).

He missed the different oil pump. Some other part numbers are different but unlikely they're anything but a supplier change.

 

[GoatAutomotive]

6:57 in the video: “if you have a GTI, you’re a loser.” -Paul

He did credit Tony, though, which was a move in the right direction. @DerHase