I purchased a new set of Efini twin turbos from RX7.com last month. I just wanted to share the pics and tell you guys what I noticed. I noticed its not stamped N3G1 on the side of the housings, but instead it's stamped HT12-3CR. I also noticed the actuators are more of a silver color instead of a bronze color. It has very minor lateral (side to side) shaft play, but no in and out shaft play. I just wanted to share and this maybe how they make them now. It still has the abradable housings and all the other stuff that indicates there "99 spec turbos."

Any info for the reason why it doesn't say N3G1 would be nice.

 

Pic #2

 

Pic #3

 

The part number is different because Mazda discontinued the S8 turbos 1 or 2 year ago. The turbos you received are directly from Hitachi which is the original manufacturer. The shaft play is normal, once there is oil running through them it will be eliminated.

 

Was there a reason you chose the Efini over stock or Efini over BNR? I'm looking at changing the twins on my car. Been reading lots of threads comparing the Efini against the BNR.

 

Thank you Banzai-Racing for the information.

I chose the Efini twin turbos because I don't plan on making high horse power numbers. I have minor modifications and I don't plan on doing anything crazy with my FD (I wish I could, California problems).

 

We have customers making over 400whp with the 99 twins

 

Nice, even better now if I do decide to go that route.

 

You should consider porting the wastegate before installing them.

 

...

 

Really?

what mods ? how much psi?

 

Thread is a year old. Get over it.

Matt

 

All documented on our website

Banzai Racing Gaglio SMP

 

95hp more @ 21 psi over 16.4 psi,
with or without water injection?

 

[QUOTE=MILOS7;12057597]



are the new 99 twins , the one you sell on your website from Hitachi , improved/ported compared to the old 99 twins? ( new 99 twins with silver actuators vs old 99 twins with gold actuators)



thanks

 

that average hp does not mean it was made at average boost. the 16.4 is likely before or way after peak torq or peak hp.

 

That is not how a dyno sheet is read. 16.4 is the average boost for the run from 3k-8k rpm, 21 psi is after transition. Exactly like peak HP is from 6k-8k the average for the run is 305, which means nothing. If I started the dyno run at 2k the average would be lower. If I started the dyno run at 5000rpm the averages would be 400 hp and 21psi, which again mean nothing really as far as peak number go. Dyno sheets are designed to show the range of power from low to high rpm.

Follow the link if you want the mods list.

Just to show how great of a sheet that actually is here is a 509rwhp car I tuned last week, single turbo. This cars averages for the run are only slightly better, even though it made over 100 hp more at peak power. At 3k rpm the single turbo car can't even pretend to keep up to the twins car.

 

Here is a car I just tuned today

99 twins with our street port 350rwhp @ 14psi

 

I hope the owner did port the stock wastegate holes and powder coated those hotside manifolds before he installed them...might as well do everything to protect that investment and future proof things IMHO.



^^^That is what I hope you can get out of my car Chris, but stock twins

Engine goes in Saturday...need to set up a date with you!

 

I'm loving these numbers... good to know you can still get a new set of the twins.