Hybrid as in a mix of SR with QR and yes SR20 crank with full counterweight, proven and cheap 86mm down from 100mm stroke.

A stock QR25DE is 200+hp from factory achieved at a low 6500rpm but with 86mm stroke crank 9k rpm is possible and more lift
with slightly more duration 240-280hp is possible.

The conrods are the weak link on post 2008 engines but everything else is sorted on that second revision.

just the better balance I think but weight gets heavier due to extra counterweights and denser steel matrix

Durability is the key therefore higher rpm with longer life thanks to less torsional vibrations stress etc.

The idea is to get an 87mm or 88mm stroker for sleeved 83 offset sleeved bores 1.9-2.0L A series etc

Trav and J Wolf have found the SR20DE crankshaft fits with little work into the qr engines
this was done when the 2008 revised edition of the qr25de with full counterweight crank
from factory and also as an alternative to the SR20DE stroker sleeved engine.

1.15:1 compression pistons are available from 2jz racing as used in NA 2jz engines
https://www.2j-racing.com/media/catalo ... mg_20200706_144503874.jpg
https://www.2j-racing.com/2jr-high-comp-piston-set-11-5-1-qr25.html
Canam forged pistons also available that can be used
https://canampartsguy.com/product/40152m09200/?v=24d22e03afb2
https://canampartsguy.com/wp-content/u ... 43b-9bf1-79055d3c65e1.jpg


2.0L
QR20DE SR20DE custom rods, QR25DE cams induction and exhaust for 8-9000rpm 200hp

2.2L
QR25DE using SR20DE crankshaft and custom rods can rev to 8-9000rpm with no issues to make over 220hp.
90mm bores dont need sleeves whilst 92mm bores are possible with sleeves

2.4L high rev
91mm J Wolf crankshaft, rods, cams

2.5L Stock with bolt ons (rods limit it to 7k rpm)
QR25DE post 2008 is a serious bit of gear an improved version with full counterweight
100mm crankshaft that with with bolt on 200+hp has been done in the US for over a decade but limited to FF or FWD

2.7L QRazy
92mm sleeves, pistons, rods and stock crankshaft

The engine is lighter and more compact than the SR20DE
with the only obstacle a rwd gearbox.

Now if only I can get hold of an old N10 Pulsar for
a QR27DE with AWD Sir setup.

putting it up for the all out power freaks
https://adracingparts.com/collections/ ... t-crank-shaft-82mm-stroke

John hope you get that lil beast going again, was good to see you cruising in the area long ago as you and I were some of the only guys driving analog machinery as dailys. We where like 5 minute drives from each other then, seems like a different life for me now I am in another world. Still love Terra Australis but we saw the writing on the wall as it is a corporate commonwealth registered under the SEC in washing DC running the show

https://scontent-nrt1-1.xx.fbcdn.net/v ... NdFDKByeSfiTw&oe=62912237

https://www.bitchute.com/video/h4XnLjr ... 3c-6Q7vzn_NbO-Dh1rWFwjW7U

if you ever come to Japan let me know and I will steer you away from toxic tokyo were most drones end up as a have to.

Yes the price is rice, I mean nice or even wise
just putting it out there for those on a budget

3kg cro mo through jauce around 180 usd on special
much cheaper than what I paid once upon a time

https://www.jauce.com/auction/x1051843612

LOL just that first pic looks like your ute extra long than 98-99inch wheelbase
One of those old spirit v8 engines was tuned for 680hp in engine masters challenge
about 15 years ago, amazing just like now someone go an A series to 350hp boosted.

The LWB ute is the only datsun that is still affordable still in Japan.

Yep my external regulator sat in the bay for a while till I trusted
the modifications over the years then eventually removed it and shortened
the wires that were connected to rid the external reg.

Japan maybe improved the quality of their later internally regulated alts
on fwd engines maybe from the extra heat and improved know how as japanese
economy improved and exports increased out of Japan.

My Mazda 70s alternators died from living over 7000rpm but when replaced
with later 80s units one I know has had engine rebuilt halve a dozen times
but alternator is the 90s version upgrade I had done which the auto elec
just charged me a 4L Cask of Lambrusco. It was just a wire with connectors
that joined 2 pins and to check the charging voltage etc.
For me at the time it was like he knew how to do magic :)

Looks like a nice head for boost for a cheap SR20DE bottom end
as the SR crank fits the QR but the SR is still a closed deck
and sand cast block thicker than pressure die cast.
This head would make an SR 10-12kg lighter using boost as no
need for a heavy turbo manifold, no need for porting just take
out those new worlds first resin insert thinga me bobs