penko

What are the benefits of porting a t2 engine,and what's the bad side of it ,in other words is it worth it.
I'm putting in a t04 60-1 in january and somebody suggested that i did that.Thanks

HWO

will give you a broader power range, will pull harder in the mid range and top end. it may make your car slightly louder (is that a bad thing?)

Wargasm

Depending on how much you change the shape of the port, it may also make your idle a little rougher and could increase your emissions.

I'd still do it though!!!!

Brian
87 TII
93 R1

Judge Ito

If u get your engine ported by a good reputable Rotary Engine builder, u will be very happy. Ported turbo engine =

kabooski

Thats Right!
NOTHING increases POWER Like porting a Rotary engine
and altering it's Port Timing......

B430

i want to ask something about porting a TII so i'll add it here:

how much of a port is too much for a street car? would a bridge port be too big? all the RX-7 shop sites say a bridge port is too much for the street, but soul assasin has a bridge port and his car is daily driven, so i'm confused. i don't mind if i lose some low end as long as the car is still practical in traffic.

HWO

all depends on the persons definition of streetable

13BAce

What else do you plan on doing besides the port?

B430

well at first just intake and exhaust, maybe bigger injectors and port the wastegate so i don't get boost creep with the bigger exhaust. Eventually a FMIC, bigger turbo, and a haltech or something similar. i don't know how long it will take me to do everything, depends how much money i have but i'd like to be able to get a big turbo, FMIC, and ECU before the end of the 2002 race season.

crispeed

Yeh!
Shoeshine was running 150hp+ shot out of the hole without the wheelie bars on! I was standing behind the car when he did that wheelie! It was pretty interesting when I saw the back bumper scrape the track!

crispeed
87TII
9.20@150mph

13BAce

If you're going to take it slow with the mods then I would say to go with a good streetport because the stock ECU isn't going to be able to handle a bridgeport.

HWO

the factory turbo will be at its 'redline' at about 4000rpm with a bridge port aswell.

13BAce

Yeah, I forgot about that. My friend just put a 13B REW with a BIG exhaust port in his TII, but he's using the stock TII turbo for now. I think he's going to make 20 PSI at 2000 RPM.:p

B430

isn't that a good thing? full boost at like 1500rpm, as long as you wastegate can keep the boost where you want it wouldn't that be a good setup for low end power?

13BAce

It wouldn't be good on a car with a redline of 8K+ RPM's. That turbo would choke a bridgeported motor.

FastX7

Mine's not a T2, but portin is portin...
1 - What would be a good turbo for a half-bridged "weekend warrior" FD?
2 - Can the Power FC handle tuning for a half-BP motor?
3 - What kind of fuel setup would be needed for a half-BP and 14 psi? 22 psi?

13BAce

With a partial bridgeport you should get a turbo with a pretty big exhaust housing, maybe like a T-76. The PFC will only work up to 17.5 PSI. The main attribute it seems to have is that it just plugs in and works right away. You're better off with a different ECU that has more flexibility. You'll need an external pump and large fuel injectors--at least 720 primaries and 1600 secondaries--to handle the kind of power a partial BP will make.

R1DREAD has a partial bridgeport with a T-88, Haltech E6K, and 4 1600 cc injectors. I don't know what kind of pump he has, but I'm sure it's an external pump, maybe twin Bosch's? His car is making ALOT of power.

HWO

a t04 with a 1.15 or 1.32A/R divided exhuast housing will work well on a FD with bridge ported secondaries. with a 60-1 compressor set up on the front of it you'll have the potential for upto 600HP if you wind up the boost, i'd think about 18psi would be adequate for 600HP with B.P.S

anything over that and you'll be outta the compressors efficency range.

For fuel supply at 22 psi on that motor i'd say 720cc primaries and 1600cc secondaries or similar, make sure you have a very large volume pump and upgraded lines

B430

is the problem the ECU or the AFM? if it's the AFM i think i can get around it (i think, i'll have to test it out) and then i can use the money i saved not buying a haltech to get a big turbo (i would eventually get a haltech or similar though)

HWO

the factory ECU and the AFM go hand in hand, they both complement each other at being pieces of ****.

throw away both and get an aftermarket efi system

13BAce

That's the best way I have ever heard it said.