DREYKO

im trying to see how far a stock port engines been pushed successfully.
this includes ram air, home-made manidolds, exaust mods, standalone, any and everything exept porting, turbo, supercharger, and nos
i know its been asked, but i want actual sheets if possible. exact numbers

adrock3217

Exact sheets? Exact numbers? Exact SEARCH? Search up Kahren..

There is no such thing as ram air...aside from jets...

DREYKO

yes there is it doesnt do much, nothing on a dyno in fact but it does work a bit and i do NOT want this to turn into a ram air discussion
i looked up kahren and only found ported numbers

DREYKO

anybody?

arghx

iTrader: (3)

the thing about a custom manifold is that you would really want to use it with a ported engine to fully take advantage of it

GTU_FAN

What are the pros or cons about porting/polishing intake runners on a rotary? And remember he said stock-"ported" engine not "stock" engine so everything else could be modified including internals.

DREYKO

well actually im looking at all internals beings stock

SirCygnus

iTrader: (1)

there isnt much you can do to the internals. lol.

GTU_FAN

You could raise compression...

staticguitar313

iTrader: (2)

not really

Sideways7

iTrader: (7)

Only if its an s4 and you swap in s5 rotors. Sseriously, though, I don't think anyones gone to the effort to tune up a stock port engine. Theres just not really much reason for most people. If its still got stock ports, then its probably an older engine so it won't be with maxing out.

razorback

gsl-se rotors are 9.7 arent they? isnt the highest fc rotors 9.4?

arghx

iTrader: (3)

gsl-se are 9.4 . highest FC is 9.7 in the s5's... stock for stock 2nd gen nonturbos engines are understandably better than the older gsl-se design. The manifolds on an s4 are better for example.

DREYKO

my plan is to run a s5, on a standalone, with t2 manifolds using the t2 scoop as an intake for cold air, lightweight rims tires, light weight fly, gtus tranny or miata box, dyno tuned with zero emissions, racing beat header straight through muffs and any other little things i can do to push it over the edge. im trying to break the 200 mark if possible, i highly doubt it but we'll see.

drft_180sx

ummm...yeah good luck buddy. i mean that. cause that would mean a positive outlook for me...

RotaryEvolution

iTrader: (30)

highest are 10:1 RX8 rotors and port phasing the rotors would also allow for more power but this thread is about a STOCK motor that has been modded externally.

slpin

iTrader: (9)

raising compression is overrated.....
i doubt you would see that much difference between 9.4 and 9.7... if any
try different ways of getting air into engine instead

GTU_FAN

Why couldn't you weld unto the rotor and raise the compression like you could by welding a combustion chamber on a piston engine?

RotaryEvolution

iTrader: (30)

1) the rotors would need to be rebalanced, not just any machine shop can rebalance rotors.
2) the rotors are cast iron, cast iron is not a material that is easily weldable nor would the welds be adequate for the temps/pressures in the combustion chamber

88rx7gxl

Who the hell welds the combustion chamber of a piston engine to raise the compression? The easiest way to raise the compression in a piston engine is either with flattop/popup pistons, and/or have the block 0 decked, and/or surface the heads, and/or get a smaller cc combustion chamber head. I have never heard of anyone adding a weld in the combustion chamber to raise compression. Thats just goofy.

You could also just throw some JB weld on top of the piston to raise the compression, if you were a dumbass.

I have also heard that you can wrap the rotor in electrical tape(the more you wrap, the higher the compression!!) then cut slits out so the apex seals can come through... this also will raise the compression, if your a dumbass.

SuIcIdeKiNg-

your a funny guy

DREYKO

ok once again, no internal engine changes, this is all bolt on type stuff

dufourmike

iTrader: (1)

Pd-day hit 151 to the wheels in an s5, without porting the manifolds. there isnt much left after that, other than a holley carb or tb injection.

drewski86

I put down 146whp and 135wtq on a mustang dyno. Thats on S4 with ~170k on stock motor with just a 12lb fly wheel and no main cat. Full exaust feels like ~20whp, no dyno soon as i just wrecked it and insurance is trying to screw me.

arghx

iTrader: (3)

i'm pretty sure you can't put a 4 port manifold (T2) on your 6 port engine...