N/Arx7

i saw a couple cars with a 20B but didnt see turbos, is there a 20B n/a or is it converted? and if so how much power do they make? ive been looking for a different hp option than turbo and that would be pretty cool in a fc. and ive seached and looked through the 20B threads but have found nothing. any info is appritiated or can a 13B-rew be converted?

KompressorLOgic

iTrader: (6)

the only production 20B was twin turbo stock in eunos cosmo...

i have seen a few racing companys and people that build for na setup on a 20B motor or perephail port ones ect...
the stock 20B twin turbo makes 320 hp at the flywheel.

N/Arx7

but they can be converted? and does anyone know where i can get info on it?

vipers

iTrader: (8)

of coarse they can be converted...... but its not as simple as just taking the turbos off and putting a header on....... the compression of the 20b is lower for higher boost.....and would be practically useless in an NA state.... swapping the rotors w/ ones from an na 13b (best would probubly be from the s5 na motor)....and you have the start of something...while the motor is apart, street porting it would also help dramatically....... id guess that a streetported na 20b would be good for 230-250 whp

MPM

Wrong. It can be as simple as taking the turbos off and making a header. The compression is not ideal but is usable in an N/A application. The link below shows exactly what you said can't be done.

http://fc3spro.com/PROJECTS/SKY/20B/sky20b.html

now

iTrader: (1)

didnt think a Haltech E6K could do a 20b efi and ig.
matt

RETed

It's being triggered as a 6-cylinder.
Fuel injection is staged.
Ignition fires into 3 channels.
We're using a trio of stock FC leadings with dual tower.
Each rotor leading and trailing is fired at the same time.


-Ted

vipers

iTrader: (8)

well, i dont give half-*** responses........i feel if your going to do something, do it right the first time....... as stated, low compression is NOT ideal for na applications....which is why i said to swap the rotors.....why spend all that money on a 20b, and not spend a little more to do it right (although in my opinion, taking the turbos off isnt what i would do....but, to each their own)........... i already know it CAN be done without swapping the rotors...but wont have the HP of the higher compression rotors...

so, im not wrong......i just like to do things right

t-von

iTrader: (8)

To each his own. The gentlemen is going to turbo charge the car later. No need to swap the rotors.

MPM

If putting an untouched 20B(N/A that is) in an FC chassis is wrong them I'm all for doing it the wrong way.

RETed

WTF is your problem???

You know, the people who talk **** like this are the same people who have never done it.

Go reread the page again...the dyno was run just to see what it would do, since it's at an "intermediate" stage to it's final build.
The turbo system is going to cost around $3,500 JUST IN TURBOS.
It's not like I'm super duper rich and drop that **** out of my ***.
The turbos should be in within the next two months.
We'll rerun the whole thing with turbos, and then we'll see what you will say when it puts down over 500...

Our 20B NA put down 232 at the wheels.
Another 20B with turbos put down 240 at the wheels.
I don't call that half-bad considering it took the stock twin sequential turbos just to make 8 more hp...


-Ted

GtoRx7

iTrader: (5)

damn straight

vipers

iTrader: (8)

everyone is veering away from what the original question was!! he wanted to know if a 20b could be converthed to na....he didnt want turbos...so im my opinion, what i stated earlier is his best choice..... everyone is getting so butt-hurt over all this...

reted...i never said anything that should have given you that response...... i wasnt commentig on anything you said....i was replying to the guy (MPM) who said i was wrong.... since im not "wrong"...i responded.....everything is a difference of opinion... the guy originally said he wanted an alternate way to produce power besides turbos.....of coarse a 20b (even w/ lower compression rotors) is going to put down good hp #'s.....BUT, isnt it safe to say that a 20b w/ higher compression rotors in an NA configuration would put down more power (no a buttload, but a few more ponys!)?? thats all i was trying to say! so, i apologize if i offended you!

i dont know about everyone else, but i try to squeeze every horsepower i can out of a motor...and if i wanted to build a 20b NA, i would go higher compression, and port the hell out of it!!! is that so hard to understand??

MPM

I'm not offended. You were still wrong

DMRH

Thats not entirely true.

We all know the official rating of 206kW is untrue. Mazda insiders are quoted saying it was really around 225kW.

However, with its performance from 1600kg, many journo's have said the engine would actually be around 238kW

Dont ask me what that works out to in old fashioned 19th century imperial measurements.......

RETed

Someone also managed to dyno 240 at the wheels on a DynoJet, which (assuming 15% drivetrain loss) is right at 280BHP at the flywheel.
Tired motor?


-Ted