Sorry my bad forgot to put YD22DDTi and YD25DDTi engines, which are diesel and share most
of the design with the QR, except the inlet valve mechanism.

This super sturdy diesel engine is the same engine as the qr and pr but cast iron to run
the higher diesel compression and stresses of added boost.

Allows a 2.5L turbo version using the PR25DD head to easily outflow the 4g63 and VW 16v
For a budget build use the YD25De block with QR25DE crank, yd22 rods, QR25DE pistons
Stock pistons are capable of 500hp with quality tuning as proven by altima owners.
Over that 500hp will need forged rods and pistons which are available off the shelf.


As a comparison to Toyota 1ar-fe 2.7L beast


This is the Toyota 1ar-fe 1000hp pappadakis world drift championship winning engine

https://www.motortrend.com/how-to/1809-inside-papadakis-racings-1000hp-4-cylinder-drift-engine?galleryimageid=caaf6702-02e6-4d96-a154-34afd97ff2ad

https://www.motortrend.com/uploads/f/172096648.jpg?fit=around%7C1000:625

One can see the head is much taller using Honda borrowed design than direct cam actuating
like Nissan keeps using on the PR25 and the Pappakis billet set is over 2k usd where the
Nissan PR head can remain untouched in this areas saving $$$ for cams.

The beauty of the toyota engine is the 105mm stroke and 90mm bores all alloy 2.7 L4
its a proven bottom end that can easily handle whatever is thrown at it
https://www.motortrend.com/uploads/f/172096669.jpg?fit=around%7C1000:625

vs
Nissan PR25DD 100mm stroke and 89mm bores
https://www.motortrend.com/uploads/f/172096669.jpg?fit=around%7C1000:625

PR25DD heads on the Toy 1AR is tempting!
but the 1ar brand new from china is a steal as it is
https://cgauto.en.made-in-china.com/pr ... esa-Senna-Highlander.html