The stock girdle is pretty close to the crank and some builders cut it off to reduce windage losses. It was said that cutting the stock girdle off the main caps was good for over 10 whp. We don’t feel that this is advisable unless the engine is the NA VG30DE or a low-power VG30DETT build! The EPR girdle is located farther from the crank counterweights to reduce windage effects.
Here is the whole assembly waiting to be installed on our block! We look forward to getting much better stiffness and bearing life. EPR rates their caps at 1600 crank or 1200 whp which is way more than what we were planning for which is a good thing.
Stay tuned, we are going to be using a lot of new exciting VG30DETT technology and parts for our engine refresh as they get completed.
9 comments
http://epracing.net/ too; actually came across them from watching some GTP oriented groups, seems like they’re working on doing a lot of stuff to keep the old cars running, which is awesome.
It’s funny to think of iron blocks as reaching their limits after all the stereotypes of the 2JZ and stuff but it’s not new; Electramotive actually had redesigned aluminum blocks cast to fix reliability issues back in the day.
They have built 2 of my VG engines and working on #3. Very happy with my engines. They do next level work.
Very nice information. These new parts look promising!!
Love this article. Thanks for keeping your 300ZX project going. The Z32 community thanks you.
Great to see more articles related to the Z32 platform. Keep it up! Also, it would be even better to create a series of videos on the YouTube channel. Been loving the content!
Videos coming!
I prefer the BDE billet girdle design over EP racings. Sponsorships are a “thing” but it’s much more stout in my opinion as it’s one piece with less points of failure, and has waaaay more tie in to the block. I am not sure EPR has the FEA work done on this either, which is problematic.
Check it out:
https://conceptzperformance.com/bde-billet-bedplate-girdle-assembly-w-oil-pan-upgrade-kit-nissan-300zx-90-96-z32-vg30dett-bde-bb001_p_64319.php
The EP Racing one was more affordable for me and my power goals are in the 3-digit range so I decided good enough. If I was going to G30 turbos instead of G25 I would have bought the BDE girdle for sure.
This is great!
Can’t wait to see the finished product. Glad to see the Motoiq team back on the Z32 platform.