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Fastbacks bus! WOW
Posted: Sat Jul 21, 2012 2:50 pm
by panel
Re: Fastbacks bus! WOW
Posted: Sat Jul 21, 2012 5:09 pm
by turbobaja
Why are we just now seeing this thing
Looks freakin' awesome!!!
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 2:34 am
by fastback
oh..!
thx guy's .i see The Speedhunters guys have been at the Norwegian "Gatebil" festival last weekend
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 4:05 am
by Typ 11 Beetle
Fastback ,
please show us more pic´s of your bus!!!
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 1:50 pm
by brookester
What kind of powerplant is that?
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 1:57 pm
by fastback
engine is a 2.4L Wasseboxer turbo megasquirted 571 RWHP
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 2:04 pm
by fastback
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 2:09 pm
by fastback
IMG_20120711_191356 (Medium).jpg
Re: Fastbacks bus! WOW
Posted: Sun Jul 22, 2012 3:08 pm
by Clonebug
How much boost is it running????
That's a lot of hp from 2.4 liters....
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 2:22 am
by Wally
Wow! 571 RWHP now?!!
That is indeed awesome!
(stupid max 800 pixels wide STF thing)
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 7:34 am
by shag55
Vary nice Fasty!
Agreed. Hard to post any pics anymore with this size restraint.
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 7:36 am
by shag55
What size turbo? How much boost? Is lag an issue on the track?
Thanks
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 7:59 am
by fastback
The turbo is a Precision with a ~60'ish compressor wheel and a ~65'ish turbine.
boost is pretty stable on 1.2 bar(wastegate spring pressure) up to 6500 and from there it creeps up to 1.75 bar @ 7500 where i stopped on the dyno last time.
before i have had it up in 7650 on the dyno with climbing HP numbers and on the track 8200 RPM without any signs of the engine loosing power...
also with backpressure 0.7bar under boost pressure i have more horses waiting
I'ts not laggy, but my grandpa style gearchanges may give an impression of that but the few times i changes gear fast it's fast on boost again.
since i have spent 3 years collecting parts and saving money and building it , i will have some time on the track with these numbers to get some quality time with it
in the end of the season my goal is to exceed 2.0bar and go 8000+ RPM AND start using the boost control to get boost form lower RPM's
I left the boost creep as it is , since it gives the engine the extra punch on the top end . it's like a porsche GT3 on crystalmeth!
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 8:08 am
by fastback
a funny story during testing , i actually blew the wall out of the combined plenum and IC's... yes i had been a coward with the amp's on the welder and not calculated the forces on the weld. it actually is almost 1000kg force on the wall at 1.5 bar boost.!!
so i had to crank up the amp's and made a lot of reinforcements inside the plenum
IMG_20120617_183344 (Small).jpg
Re: Fastbacks bus! WOW
Posted: Tue Jul 24, 2012 8:11 am
by fastback
so i took some stock 1600 pushrods and made reinforcements .
it does not seem to influence airflow
IMG_20120619_204337 (Small).jpg
