ReZ311

iTrader: (4)

That's why they are called , "GREEEEEEEEEEEEEEEEEEEEEEEEEDY."

fi addict

You have the info right there a greddy t78 is a t66 BASICLY...
look at the sizing specs... and it is not a magic wheel in there.
t66's max at about 550 hp (crank/ at the fly)
in a 20b it will spool about a 1/3 faster (expect that with any turbo at a given PSI) than a 13b PROVIDED THE PORTS ARE THE SAME and the manifolds have been engineered somewhat the same. check that rotaryheads.com site and see how some of the 13b's spool compared to 20bs but keep in mind porting and tuning and... such. You should see 13b's spool at 6000rpm with turbos that 20b's are spooling at 4k ish.

also look at what the turbos are maxing at. Your not going to be the first to make these turbos hit 700hp where others only can make 500.
People post this info to
1) brag (by all means that'a boy!!)
but
2) and the better reason to inform.

RETed

BSFC - this is why the rotary engine doesn't make the same power as a piston engine given turbo airflow numbers.


-Ted

Wargasm

I'm amazed that the catenet site is still up.

I actually moved the site to my own domain at

http://dyno.zeroglabs.com/

a while back I also put a bunch more dynos in there.

I haven't had time to work on it in a long while, and I"m probably losing my domain/web server setup soon... so take advantage of it while it's up! Maybe I'll move the "live" (newest) data back to catenet? I dunno.

Brian

ReZ311

iTrader: (4)

I'll host it for you anytime Brian.

onefastrx7

OK, airflow is airflow...
T72 on a streetported 20B - 600+whp at 14psi
T72 on a streetported 13B - 450whp at 14psi

????

RETed

Who made 600+ at 14psi on a 20B???


-Ted

t-von

iTrader: (8)

Red-Rx7 did; however the air flow efficiency of his ported engine was so high that it put the turbo so far out of it's efficiency range that he had to replace it after a couple thousand miles.

RETed

Hmm...I guess you're talking about this thread?
https://www.rx7club.com/20b-forum-95/dynod-my-car-293958/

I wonder how valid the 14psi was, cause the readings were fluctuating all over the place... *shrug*


-Ted

BNA_ELLIS

Mecha Goriza the company that built my 20b in Japan.
Have a conversion on cosmo's and are known for getting over 600rwhp at 1.4 bar boost and they use a td07s 25g turbo. Correct me if I am wrong but I believe this turbo has the same hotside as a t78 but a smaller compressor, or it's the otherway around i.e same compressor as a t78 but bigger hotside.

t-von

iTrader: (8)

Yep! I think the 14 psi was valid. I can easily see that turbo having a hard time keeping up the boost pressure given how well Acosta ported that engine. That engine was ported to handle 1000hp through the side ports. I mean damn, he made 14psi with a 1.32 hotside at 2,800 rpm.

RETed

Funny!
They stole an old Godzilla monster for their company!
Mecha Godzilla!

Yep, a T78 is a TD-07 hotside with a T88 compressor section.
It's the same as the T67 - TD-06 hot side with a TD-07 compressor section.

Hmmmm...you sure it was hp and not ps?


-Ted

Red-Rx7

It is very reliable. The "Average" was based from the Microtech data logs. The boost gauge itself read 14 psi. Yet, through the datalogs you could see it flux a little, and thus the boost average was "13.6".

sillbeer

There really isn't that much of a difference between hp and ps. My car was dyno'd with the ps @ 587ps.

http://www.mr2ownersclub.com/converter.htm

600hp is 591.78ps.

-Destin

RETed

Hey Destin, I think you got that backwards.
PS is typically more versus equivalent HP.
1hp = 1.01387ps; 1ps = 0.98632hp


-Ted