Fritz_X

iTrader: (1)

Some people are only 15-20 whp away from 200 on stock ports Ted how is it so unbelievable to make an additional 15-20 with a good streetport?

--Fritz

White_FC

Getting damm close though.
289rwhp on a dyno dynamics dyno.
So i guess if that same person did it on a mustang dyno it could've reached 300rwhp.

but anyway, your right, the average joe even if he had a lot of money to spend wouldn't get that.
thats with alot of development and testing.

A good read on powerful N/A 13b's is to be had http://ausrotary.dntinternet.com/for...pra+birdgeport

RETed

This has been the magic number that no one has attained yet...
174 and 177 is the highest I've seen.
Someone mentioned 18x from some other forum, but I called bullshit on that thread.

It becomes the law of decreasing returns.
Surely one with an "unlimited" budget can do it, but how many of you can afford a $10,000 NA 13B engine?


-Ted

flamin-roids

Yep 300hp is going to be pretty damn impossible with a N/A. You're best off with the standard S5 9.7:1 rotors. Peripheral port definitly. Now I believe you have to run dual carbs on a PP but I really don't know a whole lot about that. Anyways dual carbs dumping alot of fuel and an ignition system to light the ****. Man its a lot of work and only if its well tuned will you see 300hp at the wheels. Would be a fun motor but unless you have money to burn its a bad idea.

SDrotary-FC

i think your wrong on that the motors i've seen are'nt cheap but they make big power , when a guy spends more than $6k on a motor it better make more than 200 at the wheels

SDrotary-FC

and i've seen some of roger mandeville 12'a hit 200 to the wheels

BGH

I read that in the late 70's that racing beat put
together a 200hp steet port 12a.
Dont know if it was flywheel or rwhp.

Fritz_X

iTrader: (1)

Law of decreasing returns sure, but porting is widely known to be the biggest net gain in power in a Naturally aspirated rotary, so explain to me how you can't squeeze an additional 15 to 20 out of an engine with stock ports buy porting it?

--Fritz

Fritz_X

iTrader: (1)

agghhh spelled "by" totally wrong what the hell happened there!?

--Fritz

edmcguirk

You can't change Torque in a NA engine by much but with the proper porting you can move the torque to an RPM range that will make the HP you want.

Let's be generous and say that you can get 150 foot pounds of torque out of a NA 13B. You'll need to port it to run at 10,500RPM to make 300 HP.

(RPM=HP*5250/T)

good luck
ed

SnowmanSteiner

You don't have to use carbs on a pp port setup. There are many other alternatives, there are ida throttle body setups that have four injector holes already manufactured into them. Or you can go with two regular throttlebodies and add injector bungs on the intake runners. If you look at Banzaitoyota's setup he has an IDA setup. I will be running a similar setup but I will be placing my two primary injectors in front of the port and the four secondaries much further up on the intake runners.

- Steiner

RETed

I ask again, you think the original poster or most of the FC NA owners in here can afford something like that?
Can it be done on a stock ECU?


-Ted

RETed

And the specs?
Street port spun over 9kRPM?
Bridge?


-Ted

RETed

This is what I'm doubting.
This is what you need to prove.


-Ted

banzaitoyota

Trust me, its getting real expensive REAL QUICK in PP land!!!

NZConvertible

I'm assuming you mean power at the wheels, since people have been getting 300fwhp from 13B's for over 20 years...

flamin-roids

Yeah but seeing as how now adays most N/A FC owners can't afford to fund such a project. I'm sure with enough money you can make a 400hp N/A but most of us can't afford it. And I've seen a street ported N/A get 213hp at the wheels. It had a huge port job done along with a dual side draft carb setup and some other goodies.

Fritz_X

iTrader: (1)

I just hope I can come close to doing that once my motor is broken in and dynoed. Only graphs and numbers will prove it though. Can't wait to see the final results.

--Fritz

IaMtHeRuThLeSs1

hell yes

Terrh

iTrader: (7)

I went for a ride in BamBam7's s5 NA with a streetport.. . he was shifting around 9krpm, I never saw a dyno sheet, but the"butt dyno" says it was faster than a stock TII..

edmcguirk

400HP NA 13B??? Not unless you can turn 15,000RPM

SDrotary-FC

no it is not for the average FC owner and a full stand alone is the only way to make big power, i'm just saying it can be done