Nice car indeed... The dual wastegates help with spiking and provides much easier boost control. Engines running at high boost also create high exhaust pressures, and although you may think that one single big wastegate can do the same, it is not what it seems.

One big wastegate has a large valve, which equates to a large surface area being subjected to exhaust pressures. Since exhaust pressure pushes the wastegate valve upwards, the larger the surface area, the more force is pushed upwards. You often run heavier wastegate springs to keep it shut and run more boost. One single big wastegate (like a 60mm) has a huge surface area, and to run 30+ PSI of boost for example will require a VERY heavy spring. Too heavy of a spring then you lose resolution in boost control and you often run into huge boost spikes. You also lose the ability to run lower boost if needed for better traction during launching.

Two wastegates will allow both gates to run a reasonably sized spring without the drawbacks of one huge heavy spring on a big wastegate.

Aside from that, the other reason to run dual wastegates is to provide a separate path for exhaust to bleed pressure on a twin-scroll or divided turbo setup. Twin-scroll/divided manifold setups are divided into two separate sections, thus, allowing quicker spool (common practice on turbo diesels). Having two wastegates, one on each "scroll" provides equal venting on both sides of the scroll.

Anyway, here's a video of the same drag car over at DMT.. No numbers are released, but you can see it do a few quick dyno runs:

Videos & Updates (check out August 2009 videos):

 

While the car is sick, I don't think it's right to call it a Civic :-)

 

ya man my brothers pictures will be delayed a bit
he just put a turbo on his car but the turbo was no good
so now he needs to get a new turbo
i will let you ppl know once everything will be running .. hopefully sometime before the winter

 

nice car

 

Crazy!!!!

 

thats alot of work

 

^^

 

Same here.

 

nice

 

jesus.... an eight second civic. I wonder what the hell he did for traction. Whats next some POS delorean that once it his 88 Mph can time travel......

 

it looks nice... would like to see some videos with it on the track once its ready

 

any more pics?!

 

no sorry guys havent seen him in a while ... will try to get more but this is all for the time being

 

wow

 

nice work

 

to much work for nothing.. in the end

 

nice

 

nice

 

that ish looks surrus!

 

it is serious man
u can see this guy at cayuga sometimes in the summer

 

Dima wats going on bro. how's the exhaustt?
this car is looking sick bro tell your brother i need to see his accord man.
once again this thing is SICKKK

 

hey whats up sina
ya man my brothers accord is sick man nice h22 in it from japan
come by sometime and check it out
my brother is loving the accord right now
and mufler is good man.. thanx again

 

i know i was supposed to come by check it out last week with adam he never called back to tell me wen his not busy. neway pm me ur number i lost it.

 

ETD built this car many years ago, use to be owned by mike p.
Yes it did have a turbo d-series in it 2 or 3 years ago.
very nicely built car, John is one of only guys that i would still trust out there to build my stuff i can't do

 

sorry man i think your wrong.. my bothers friend built this car from scratch and nobody named mike p owned it.. but its all good man i will try to get u more pics so you can see its not someone that u know named mike p. lol and im not sure who john is either..