blac89rx7

i have an 89rxt turbo II with 16-20psi and i want to know what would give me the most power, porting the heads of the factory turbo or an after market turbo tryin to get to at least 500horses or better with the help of an known rx7 tuner....

Black91n/a

You need to read up on the Wankel. It's got no heads to port. To port the motor you need to completely dissasemble it, meaning it usually only gets done when a rebuild is needed.

500hp is a lot for a 13B and you'll have to do lots of supporting mods and get a good tune, or it will promptly blow up.

Search the forum, there's lots of good infor out there. Forum member LUPE has 603whp, maybe look up some of his threads.

eastcoastbumps

iTrader: (1)

You'll need forged pistons to hold that kind of power.

EProdRx7

And a big cam...

Digi7ech

iTrader: (1)

If your running 16-20psi on the stock turbo....

The stock turbo is out of it's efficienacy range around 13psi.
15+psi is asking to destroy the turbo as well because it's not made for that range.
Then there's the question of fuel management for that given psi.

There is no head on a turbo to port.
There is very short exhaust manifold but is fine for stock turbo. Porting it won't do you any good. See above psi range reasons.

As for hitting 500hp.
A T70 will get you there but I highly doubt you have the knowledge to keep an Rx7 like that running for more than a month if you ever even finish building it.

prjct87rx7

iTrader: (7)

dont forget bigger valves,springs and retainers.lol

J-Rat

iTrader: (2)

Oh man..

jeremy

iTrader: (1)

the heads have plenty of flow. drop in a stage III cam and some underdrive pulleys and you should hit about 400hp @ 26psi on the stocker. make sure and get a bigger radiator. i'd remove the oil cooler. all it does is block airflow to the radiator.

Boostmaniac

Is the head V-TEC or non V-TEC? That is important before you get down to porting

Carzy Driver

hey my 7 has a valve... used one for the wastegate.

RotaryBuddha

iTrader: (4)

i feel bad for even being from the same state as this guy. were not all dumb down here

fastrotaries

The only cam on my 7 holds up my hood. BTW welcome to the forum. Rotary enginesl are a strange yet neat little motor. Treat one right, and it's faster than a raped ape.

RotaryResurrection

iTrader: (8)

What in the mother **** is going on in here?

Carzy Driver

gotta love it!!! ROFL again and again!!!!!!!!!!!!!!

NOPR

actually, a lot of puerto ricans call side housings, or irons 'heads'. on the rx-8 both the intake and exhaust port are on the irons, so why not call them heads?

Digi7ech

iTrader: (1)

Because a head would indicate that it's on top not sandwiched in the engine. :P

That's like calling the afm a carb :P :P Well it's a stretch but what eva.

BTW on the huge smiley from Kevin.

stevensimon

iTrader: (11)

so.. wait.. you are saying that my rx7 turbo 2 drift machine doesnt have heads? prove it!

razorback

im going to port the heads in my t2...

Funkspectrum

iTrader: (5)

I need to install my oversized titanium valves in my 13BT... I figure after the porting work that was done, i'd need em...

13b4me

PRICELESS!

The Wankler

iTrader: (14)

LMAO ******* LOUD!

Funny, I can not even speak piston language.... I just dont know all that rocker arm cam shiyat..

RotaryEvolution

iTrader: (30)

well if they call the irons heads in puerto rico then we need to bomb the country and start over regardless of how many quick rotaries there are there.

NOPR

noo! puerto rico is home to some rican rotary miracle makers!

i betchu fools dont even know about pac-men!

raptor22

WTF? I'm his psychiatrist. Here's a photo to prove it!

blmcquig

iTrader: (15)

way to go, scared him off (guess that'll be one more TII in the for sale section though)